A FIBER-REINFORCED RCA CONCRETE COMPOSITION WITH INTEGRATED PLASTIC WASTE FOR PAVER BLOCKS

Abstract

Present invention discloses a fiber-reinforced concrete composition for paver blocks, incorporating recycled coarse aggregate (RCA) and plastic waste to enhance sustainability and performance. The composition includes cement, fine aggregates, fiber reinforcement, and water, achieving increased tensile strength, crack resistance, and water resistance for durability in outdoor applications. Designed for compatibility with standard concrete equipment, this composition supports environmental conservation by reducing reliance on virgin materials, repurposing waste, and providing a cost-effective, durable solution for sustainable infrastructure projects.

Specification

Description:FIELD OF THE INVENTION:
The field of this invention pertains to construction materials, specifically a concrete composition that utilizes recycled coarse aggregate (RCA) reinforced with fibers and integrated plastic waste. This composition is optimized for the production of durable, sustainable paver blocks, addressing environmental concerns through waste material repurposing and enhanced structural resilience.

BACKGROUD OF THE INVENTION:
Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
Concrete has long been the backbone of modern infrastructure, widely utilized for its durability, versatility, and affordability. However, with the increasing demand for sustainable construction practices, traditional concrete production faces scrutiny due to its environmental impact, particularly its contribution to resource depletion, carbon emissions, and landfill waste. This impact is amplified by the significant consumption of natural aggregates and the reliance on conventional, high-carbon-emission materials. As global construction activity continues to rise, there is an urgent need to develop innovative concrete formulations that reduce environmental harm while maintaining the mechanical integrity and durability expected of construction-grade materials.
One approach to reducing concrete's ecological footprint is the partial or complete replacement of natural aggregates with recycled materials, specifically recycled coarse aggregate (RCA) sourced from construction and demolition (C&D) waste. RCA is derived from crushed concrete debris, which, instead of being disposed of in landfills, can be processed and reintroduced into the production cycle as a substitute for virgin aggregates. This practice not only reduces the strain on natural resources but also lowers the carbon footprint associated with aggregate extraction and processing. However, RCA alone has certain limitations, including its variable quality and sometimes lower strength compared to natural aggregates, making it essential to optimize its composition for specific applications.
Simultaneously, the accumulation of plastic waste has emerged as a critical environmental issue, with millions of tons of plastic ending up in landfills or polluting ecosystems annually. Despite the recyclability of certain plastics, the recycling rate remains low, and much of the plastic waste generated is not effectively utilized. One potential application for this plastic waste is its incorporation into concrete as a partial replacement for aggregate or as an additive to enhance specific properties. When processed and integrated correctly, plastic waste can improve concrete's durability, reduce weight, and potentially lower production costs. However, there are challenges in ensuring compatibility between plastic particles and the cement matrix, as well as in achieving the desired mechanical properties for load-bearing applications.
To address these challenges, this invention proposes a fiber-reinforced concrete composition specifically formulated for paver blocks, which integrates both RCA and processed plastic waste. Paver blocks are widely used in paving applications for walkways, driveways, and outdoor spaces, and they require a composition that provides both durability and resistance to weathering. By introducing a carefully balanced mix of RCA and plastic waste, reinforced with high-strength fibers, this composition achieves structural integrity and longevity while promoting sustainable material practices. The addition of fibers helps to mitigate the inherent weaknesses of RCA, enhancing the tensile strength and crack resistance of the concrete, which is especially important for paver blocks that endure repeated loading and exposure to environmental stressors.
The integration of plastic waste, in particular, brings several advantages. First, plastic particles, when appropriately processed and sized, can act as a lightweight aggregate, potentially reducing the density of the concrete and making it easier to handle and install. Additionally, plastic waste contributes to the material's resilience against moisture and freeze-thaw cycles, which are common causes of concrete deterioration in outdoor settings. The hydrophobic nature of plastic can improve the water resistance of the paver blocks, reducing the likelihood of water ingress and subsequent damage during cold weather. Furthermore, using plastic waste in concrete contributes to a circular economy, diverting waste from landfills and reducing the demand for virgin materials in construction applications.
One of the critical innovations in this composition is the combination of RCA and plastic waste with fiber reinforcement. This three-part strategy addresses both environmental and structural concerns, creating a material that is both sustainable and performance-oriented. The fibers, which may be synthetic or natural, are distributed throughout the concrete matrix, bridging microcracks and enhancing the material's tensile strength. This reinforcement is particularly beneficial in paver blocks, which are often subject to compressive and flexural stresses. By bridging cracks and redistributing stress, the fibers contribute to the overall longevity of the concrete, reducing the likelihood of premature failure and extending the service life of the paver blocks.
In terms of processing, the composition is designed to be compatible with conventional concrete mixing and molding equipment, ensuring ease of implementation in existing manufacturing setups. The RCA is sourced from carefully screened C&D waste to ensure consistent quality, while the plastic waste is processed to achieve a particle size that enhances bonding within the cementitious matrix. The fibers are introduced during mixing, ensuring an even distribution throughout the batch. This approach allows manufacturers to produce sustainable paver blocks without significant alterations to production processes, making it a viable solution for large-scale adoption.
The development of this concrete composition also aligns with several sustainable development goals (SDGs), including responsible consumption and production, climate action, and sustainable cities and communities. By reducing the need for virgin aggregates, the composition helps to conserve natural resources and minimize the environmental impact of aggregate mining. Furthermore, the use of plastic waste and RCA contributes to waste reduction, addressing the urgent issue of landfill overflow and environmental pollution. The increased durability and longevity of fiber-reinforced paver blocks also contribute to sustainability by reducing the frequency of repairs and replacements, thereby lowering resource consumption over the long term.
In terms of performance, preliminary tests indicate that this fiber-reinforced RCA and plastic-infused concrete achieves satisfactory compressive and tensile strength for use in paver blocks, meeting the structural demands of both pedestrian and light vehicular applications. The resistance to wear and degradation under cyclical loading is another significant benefit, as it ensures that the paver blocks maintain their integrity over time. Additionally, the composition has shown improved resistance to abrasion and impact, both of which are critical factors for outdoor paving materials exposed to frequent contact and mechanical stress.
This invention represents a practical, eco-friendly solution for the construction industry, offering an effective means of producing durable paver blocks with reduced environmental impact. As cities and infrastructure projects increasingly prioritize sustainability, the demand for such materials is expected to grow, driving the need for innovations that balance performance with ecological responsibility. The fiber-reinforced RCA concrete with plastic waste integration meets this demand by providing a viable alternative to conventional paver block materials, combining the benefits of waste reduction, resource conservation, and enhanced durability.
Therefore, the development of fiber-reinforced RCA concrete incorporating plastic waste is a timely advancement for the construction sector, reflecting the industry's shift towards more sustainable practices. By leveraging the properties of recycled aggregate, plastic waste, and fiber reinforcement, this composition not only meets the technical requirements for paver blocks but also contributes positively to environmental conservation efforts. This invention has the potential to transform paver block production, paving the way for a more sustainable and resilient built environment.
OBJECTS OF THE INVENTION:
The prime object of the invention is to provide a fiber-reinforced RCA concrete composition with integrated plastic waste that offers enhanced durability and structural integrity for paver blocks, meeting the demands of both pedestrian and light vehicular applications. This composition seeks to address environmental concerns by incorporating recycled materials, reducing reliance on natural aggregates, and promoting the use of plastic waste within the construction industry.
Another object of the invention is to produce paver blocks with improved mechanical properties, such as increased tensile strength and crack resistance, by introducing fiber reinforcement. These fibers are dispersed throughout the concrete matrix, effectively bridging microcracks and enhancing the material's overall resilience. This addition allows the paver blocks to withstand repeated loads and environmental stresses, thereby extending their service life and reducing the frequency of replacements.
Yet another object of the invention is to contribute to sustainable construction practices by utilizing recycled coarse aggregate (RCA) derived from construction and demolition (C&D) waste. The inclusion of RCA not only conserves natural resources by reducing the demand for virgin aggregates but also helps to minimize the waste sent to landfills. This approach aligns with the principles of the circular economy, promoting material reuse and supporting resource conservation within the construction sector.
Still another object of the invention is to mitigate environmental pollution by repurposing plastic waste in the concrete composition. By processing plastic waste into a form suitable for concrete integration, this invention diverts a significant amount of plastic from landfills and the environment. This inclusion of plastic waste also offers performance benefits, such as increased water resistance, which reduces the likelihood of freeze-thaw damage in outdoor paver applications.
A further object of the invention is to create a concrete composition that is compatible with standard manufacturing processes, allowing for easy integration into existing paver block production lines. By designing the mix to be adaptable to conventional concrete mixing and molding equipment, the invention provides a practical solution that can be adopted at scale without requiring significant modifications to current manufacturing setups.
An additional object of the invention is to enhance the water resistance of paver blocks through the hydrophobic properties of plastic waste. This quality reduces water absorption, helping to prevent damage from moisture and freeze-thaw cycles, thereby improving the durability and lifespan of the paver blocks, especially in regions with extreme weather conditions.
Another object of the invention is to improve the sustainability profile of paver blocks by incorporating recycled materials without compromising structural performance. The combination of RCA, plastic waste, and fiber reinforcement allows the composition to meet the strength and durability requirements of outdoor paving while reducing its environmental impact, offering a balanced solution that supports both functionality and ecological responsibility.
Finally, the invention aims to provide a cost-effective solution for paver block production, leveraging readily available waste materials to lower raw material costs. By using recycled aggregates and plastic waste, the composition reduces the dependency on more expensive virgin materials, potentially lowering production costs and making sustainable paver blocks a financially viable option for large-scale construction projects.

SUMMARY OF THE INVENTION:
The invention presents a specialized concrete composition formulated for paver blocks that incorporates recycled coarse aggregate (RCA), plastic waste, and fiber reinforcement, resulting in a highly durable and eco-friendly material. The composition is designed to reduce reliance on natural aggregates and to repurpose plastic waste effectively, meeting environmental goals while ensuring the mechanical strength and durability needed for outdoor paving applications.
The primary ingredients in this composition include:
1. Recycled Coarse Aggregate (RCA): 50-60% of the total aggregate volume, replacing natural coarse aggregates. RCA, derived from construction and demolition (C&D) waste, offers an eco-friendly alternative to virgin materials.
2. Plastic Waste: 5-10% of the total aggregate volume, processed to a specific particle size to ensure compatibility within the concrete matrix. The plastic waste is incorporated as a lightweight aggregate replacement, contributing to reduced density, improved water resistance, and waste reduction.
3. Cement: 20-25% of the total composition, serving as the primary binder. This standard percentage ensures optimal binding of aggregates and waste materials, maintaining the composition's structural integrity.
4. Fine Aggregate (Sand): 15-20% of the total aggregate volume, supporting the distribution of RCA and plastic waste within the concrete matrix.
5. Fiber Reinforcement: 0.5-1% by weight of the cement, introduced to enhance the tensile strength, crack resistance, and overall durability. Fibers may be synthetic or natural, selected based on compatibility with the concrete matrix and durability under environmental stresses.
6. Water: 10-15% of the composition by weight, providing the necessary hydration for cementitious reactions while maintaining the desired workability for ease of molding and setting.
The composition is designed to be adaptable to conventional concrete mixing and molding processes, allowing for scalable production without the need for significant modifications to existing equipment.
An inventive aspect of the invention is to provide a sustainable concrete composition for paver blocks that incorporates RCA and plastic waste, effectively addressing resource conservation and waste management goals in the construction industry. This composition reduces the demand for natural aggregates and utilizes plastic waste, which would otherwise contribute to landfill pollution, thereby supporting the principles of a circular economy.
Another inventive aspect of the invention is to provide a durable concrete composition with enhanced tensile strength and crack resistance, achieved through the inclusion of fiber reinforcement. This feature allows the paver blocks to withstand repeated loading and exposure to environmental stresses, making them highly suitable for outdoor applications. The fibers effectively bridge microcracks, redistributing stresses and enhancing the overall longevity of the blocks.
Yet another inventive aspect of the invention is to provide a concrete composition with improved water resistance by integrating plastic waste particles. Plastic waste, with its hydrophobic nature, reduces water absorption in the paver blocks, minimizing freeze-thaw damage and increasing durability in regions prone to moisture and temperature fluctuations. This aspect improves the service life of the paver blocks, reducing the need for frequent replacements.
Still another inventive aspect of the invention is to enable a cost-effective production of sustainable paver blocks by utilizing readily available recycled materials, such as RCA and plastic waste, in place of more expensive virgin materials. This approach lowers raw material costs and makes sustainable concrete solutions more financially accessible for large-scale construction projects, thus promoting widespread adoption of eco-friendly practices within the industry.

BRIEF DESCRIPTION OF DRAWINGS:
The accompanying drawings illustrate various embodiments of "Fiber-Reinforced RCA Concrete Composition with Integrated Plastic Waste for Paver Blocks," highlighting key aspects of its formulation and application. These figures are intended for illustrative purposes to aid in understanding the invention and are not meant to limit its scope.
FIG. 1 depicts a block diagram of a fiber-reinforced RCA concrete composition with plastic waste integration, showing its ingredients and their respective proportions according to an embodiment of the present invention.
The drawings provided will be further described in detail in the following sections. They offer a visual representation of the concrete composition's formulation, mixing process, and structural properties, helping to clarify and support the detailed description of the invention.

DETAILED DESCRIPTION OF THE INVENTION:
In the following detailed description, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that the embodiments may be combined, or that other embodiments may be utilized and that structural and logical changes may be made without departing from the spirit and scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims and their equivalents.
The present invention is described in brief with reference to the accompanying drawings. Now, refer in more detail to the exemplary drawings for the purposes of illustrating non-limiting embodiments of the present invention.
As used herein, the term "comprising" and its derivatives including "comprises" and "comprise" include each of the stated integers or elements but does not exclude the inclusion of one or more further integers or elements.
As used herein, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. For example, reference to "a device" encompasses a single device as well as two or more devices, and the like.
As used herein, the terms "for example", "like", "such as", or "including" are meant to introduce examples that further clarify more general subject matter. Unless otherwise specified, these examples are provided only as an aid for understanding the applications illustrated in the present disclosure, and are not meant to be limiting in any fashion.
As used herein, the terms ""may", "can", "could", or "might" be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. These exemplary embodiments are provided only for illustrative purposes and so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those of ordinary skill in the art. The invention disclosed may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Various modifications will be readily apparent to persons skilled in the art. The general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the invention. Moreover, all statements herein reciting embodiments of the invention, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure). Also, the terminology and phraseology used is for the purpose of describing exemplary embodiments and should not be considered limiting. Thus, the present invention is to be accorded the widest scope encompassing numerous alternatives, modifications and equivalents consistent with the principles and features disclosed. For purpose of clarity, details relating to technical material that is known in the technical fields related to the invention have not been described in detail so as not to unnecessarily obscure the present invention.
Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases, it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.
All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., "such as") provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition and persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.
With reference to FIG. 1, in an embodiment of the present invention, present fiber-reinforced RCA concrete composition integrates recycled coarse aggregate (RCA) from construction and demolition waste, plastic waste particles, and fiber reinforcement, creating a durable, environmentally friendly concrete mix designed specifically for paver blocks. The invention capitalizes on the recycling potential of RCA and plastic waste, reducing the environmental footprint associated with traditional concrete production and providing a sustainable option for paving materials. RCA replaces natural aggregates in the composition, with an inclusion of 50-60% by volume. This substantial replacement rate offers both ecological and functional benefits, as RCA, processed from recycled construction materials, conserves natural resources while maintaining structural integrity within the concrete matrix. The RCA acts as a fundamental structural component, contributing to the concrete's compressive strength and durability.
Plastic waste particles are integrated as lightweight aggregate replacements, ranging from 5-10% of the composition by volume. These particles are specially processed to achieve a specified particle size that ensures compatibility with the cement matrix. When incorporated, plastic waste particles contribute to the material's durability and hydrophobic properties, enhancing water resistance and improving the concrete's performance in outdoor conditions. The hydrophobic nature of plastic prevents water ingress, reducing freeze-thaw damage, which is a common cause of wear in paver blocks. Additionally, the plastic waste serves as a sustainable material, addressing the global issue of plastic pollution by repurposing waste that would otherwise contribute to landfill overflow or environmental pollution.
The composition also includes 20-25% cement by weight, serving as the primary binder that holds the aggregates and plastic waste particles together. Cement plays a vital role in achieving the necessary binding strength and cohesive structure for the paver blocks, ensuring that all components are securely held within the matrix. Fine aggregate, comprising 15-20% of the total volume, is included to support the distribution of RCA and plastic particles throughout the concrete. The fine aggregate fills the voids within the matrix, contributing to a dense, stable structure that aids in the overall strength and uniformity of the composition. This carefully balanced mixture ensures that all components are well-distributed, resulting in a material that is both structurally sound and suitable for paver block applications.
Fiber reinforcement, in a proportion of 0.5-1% by weight of cement, is added to enhance tensile strength and crack resistance within the concrete. Fibers, which may be synthetic or natural, are distributed throughout the matrix, bridging microcracks that may develop over time. This reinforcement mechanism improves the concrete's resistance to stresses, helping it to withstand repeated loads and environmental factors that are typical for outdoor paving applications. The fiber reinforcement not only contributes to the longevity of the paver blocks but also enhances their performance under dynamic and compressive loads, making them suitable for both pedestrian and light vehicular applications.
Water is added at a proportion of 10-15% by weight to achieve optimal workability and hydration. This specific water content enables the cement to hydrate effectively, forming strong bonds with the aggregates and plastic particles. The water also ensures that the concrete mixture has the required consistency for molding, allowing it to be shaped into paver blocks with ease. This balanced hydration is crucial for achieving the desired mechanical properties in the final product, such as compressive strength, density, and durability.
To maximize compatibility with conventional concrete mixing and molding equipment, the composition is designed to require no significant modifications in the production process. RCA and plastic waste particles are processed to precise particle sizes to ensure a homogenous mix and optimal bonding within the matrix. During production, the RCA, plastic waste, cement, fine aggregate, fiber reinforcement, and water are mixed in specified proportions, ensuring a uniform distribution of all components. Once mixed, the concrete is molded into the desired paver block shapes using standard molds and equipment. The ease of processing allows for scalable production, enabling manufacturers to adopt this eco-friendly composition without additional equipment costs.
The curing process plays a critical role in enhancing the concrete's mechanical properties, as it allows for the gradual development of strength and durability. Curing is performed under controlled conditions to ensure the hydration of cement and proper bonding between the matrix components, which leads to increased mechanical strength, crack resistance, and overall durability. This curing phase is essential for achieving the structural stability and longevity expected in paver blocks, particularly those exposed to outdoor conditions.
This concrete composition provides an eco-friendly and cost-effective alternative to traditional paver blocks. By incorporating RCA and plastic waste, the material significantly reduces reliance on virgin aggregates, offering an economical solution that supports resource conservation. The recycled components also contribute to the concrete's sustainability profile by diverting waste from landfills and repurposing materials that would otherwise contribute to environmental degradation. This approach not only addresses material sustainability but also aligns with circular economy principles, promoting a shift towards more responsible consumption and production practices in the construction industry.
The use of plastic waste particles within the composition further enhances the water resistance of the paver blocks. Plastic's hydrophobic properties prevent water from penetrating the concrete, reducing the likelihood of freeze-thaw cycles, which can cause cracking and surface degradation. This water resistance is especially beneficial for outdoor applications, where paver blocks are frequently exposed to moisture, rainfall, and fluctuating temperatures. By mitigating water-related damage, the plastic-infused concrete extends the lifespan of the paver blocks, reducing maintenance and replacement costs.
The addition of fiber reinforcement contributes another layer of durability by improving the concrete's resistance to tensile stresses and crack propagation. In typical concrete applications, microcracks can develop under stress, leading to larger cracks and eventual material failure. However, the fibers bridge these microcracks, redistributing stresses across the matrix and minimizing crack growth. This feature is particularly valuable in paver blocks, which are subjected to repeated compressive and flexural stresses. The fiber reinforcement improves the structural integrity of the concrete, enabling the paver blocks to retain their shape and strength even under heavy loads.
Another advantage of this composition is its adaptability to existing concrete mixing and molding processes. The RCA and plastic waste particles are processed to a compatible size, allowing them to blend seamlessly with cement and other aggregates. This compatibility ensures a smooth manufacturing process and makes it feasible to produce paver blocks at scale. The composition's adaptability supports its potential for widespread adoption, as manufacturers can incorporate it into their production lines without significant adjustments.
In addition to its structural and environmental benefits, the composition provides a cost-effective solution by utilizing recycled materials, which are typically less expensive than virgin aggregates. RCA and plastic waste offer a sustainable alternative to traditional materials, helping to lower raw material costs. This cost efficiency makes the composition an attractive option for large-scale construction projects that prioritize sustainability without compromising on budget constraints.
The invention provides a balanced combination of recycled coarse aggregate, plastic waste particles, fine aggregate, and fiber reinforcement, resulting in a durable, high-performing concrete composition that meets the mechanical requirements of paver blocks. The materials are carefully proportioned to ensure that the composition offers strength, durability, and water resistance, making it suitable for a wide range of applications. By incorporating these recycled materials, the invention contributes to waste reduction, resource conservation, and sustainable construction practices.
The development of this concrete composition addresses several critical challenges in the construction industry, including the need for sustainable materials, reduction of environmental impact, and durability in outdoor applications. By repurposing C&D waste and plastic waste, the composition reduces landfill dependency and conserves natural resources. Its enhanced durability and resistance to environmental stresses offer a practical, long-lasting solution for paver blocks, extending their service life and reducing the frequency of repairs and replacements.
This fiber-reinforced RCA concrete composition represents an advancement in sustainable construction materials, providing an effective way to incorporate recycled content into durable, load-bearing applications. By blending RCA, plastic waste, fine aggregate, and fiber reinforcement within a cement matrix, the invention achieves a concrete mix that performs effectively under demanding conditions while contributing to environmental conservation. This solution has the potential to transform paver block production, making it possible to create eco-friendly, resilient paving materials that align with the growing demand for sustainable infrastructure.
Through its unique composition, the invention supports a shift towards environmentally responsible building practices, offering a concrete solution that prioritizes both performance and sustainability. This innovation reflects the construction industry's commitment to reducing its ecological footprint and creating materials that contribute positively to the built environment, paving the way for more resilient, resource-efficient infrastructure.

ADVANTAGES OF THE INVENTION:
The prime advantage of the invention is to provide a sustainable concrete composition that integrates recycled coarse aggregate and plastic waste, reducing reliance on virgin materials and supporting environmental conservation within the construction industry.
Another advantage of the invention is its enhanced durability and structural integrity, achieved through fiber reinforcement, which increases tensile strength and crack resistance, ensuring long-lasting performance in paver block applications.
Yet another advantage of the invention is the hydrophobic property provided by plastic waste particles, which improves water resistance, minimizes freeze-thaw damage, and extends the lifespan of paver blocks in outdoor settings.
Still another advantage is the composition's compatibility with standard concrete mixing and molding equipment, allowing seamless integration into existing manufacturing processes without requiring additional infrastructure or costly modifications.
A further advantage of the invention is the reduction of plastic waste pollution, as the composition effectively repurposes plastic particles, diverting them from landfills and contributing to a circular economy in construction.
Another advantage is the cost-effectiveness of the composition, utilizing recycled materials such as RCA and plastic waste, which are generally less expensive than natural aggregates, thus lowering overall production costs.
An additional advantage of the invention is its high adaptability to varied construction requirements, making it suitable for a wide range of paving applications, including pedestrian walkways, driveways, and light vehicular routes.
A final advantage of the invention is the reduced maintenance requirement due to improved crack resistance and durability, leading to a lower frequency of repairs and replacements, thereby saving on long-term operational costs.
, Claims:CLAIM(S):
We Claim:
1. A fiber-reinforced RCA concrete composition with integrated plastic waste for paver blocks, comprising:
a) 50-60% by volume of recycled coarse aggregate (RCA) derived from construction and demolition (C&D) waste as a replacement for natural aggregates;
b) 5-10% by volume of plastic waste particles as a lightweight aggregate replacement;
c) 20-25% by weight of cement serving as a binding agent;
d) 15-20% by volume of fine aggregate to support RCA and plastic waste distribution within the matrix;
e) 0.5-1% by weight of fiber reinforcement to enhance tensile strength and crack resistance; and
f) 10-15% by weight of water to achieve desired workability and hydration.
2. The fiber-reinforced RCA concrete composition of claim 1, wherein the plastic waste particles are processed to a specified particle size for compatibility with the concrete matrix, improving water resistance and durability.
3. The fiber-reinforced RCA concrete composition of claim 1, wherein the fiber reinforcement includes synthetic or natural fibers to enhance crack resistance, tensile strength, and longevity of the paver blocks.
4. The fiber-reinforced RCA concrete composition of claim 1, wherein the plastic waste particles impart hydrophobic properties to reduce water absorption, improving freeze-thaw resistance and suitability for outdoor applications.
5. The fiber-reinforced RCA concrete composition of claim 1, wherein the composition is formulated to be compatible with conventional concrete mixing and molding equipment for scalable production of paver blocks.
6. The fiber-reinforced RCA concrete composition of claim 1, wherein the composition achieves enhanced durability, tensile strength, and environmental sustainability by incorporating RCA, plastic waste, and fiber reinforcement as a unified structural material for paver blocks.
7. A method of manufacturing fiber-reinforced RCA concrete paver blocks using the composition of claim 1, comprising the steps of:
a) Processing RCA and plastic waste to desired particle sizes;
b) Mixing RCA, plastic waste, cement, fine aggregate, fiber reinforcement, and water in specified proportions;
c) Molding the mixture into paver block shapes using conventional equipment; and
d) Curing the molded paver blocks to achieve the required mechanical properties.
8. The method of claim 7, wherein the curing process enhances the mechanical strength, crack resistance, and durability of the paver blocks.
9. The method of claim 7, wherein the composition of fiber-reinforced RCA concrete provides a sustainable and cost-effective alternative to traditional paver blocks by reducing reliance on virgin aggregates and repurposing plastic waste.

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