A COMPOSITION FOR PREPARING SUSTAINABLE CONCRETE COMPRISING MARBLE POWDER AND COPPER SLAG

Abstract

The present invention relates to a composition for preparing sustainable concrete comprising marble powder and copper slag. this sustainable concrete composition that utilizes industrial waste materials, specifically metakaolin, marble dust powder, and copper slag, to enhance environmental sustainability while maintaining or improving concrete strength. The optimized mix consists of 11.29% of cement, 1.10% of metakaolin, 1.38% of marble dust powder, 21.97% of natural sand, and 6.9% of copper slag, alongside coarse aggregates and water. Experimental results demonstrate significant improvements in concrete properties, including a 15.2% increase in compressive strength, an 18.27% increase in flexural strength, and a 17.22% increase in split tensile strength compared to conventional concrete. this composition not only reduces reliance on conventional materials but also promotes recycling of industrial byproducts, positioning it as an eco-friendly solution for construction applications.

Specification

Description:TECHNICAL FIELD OF INVENTION

The present invention is related to the field of civil engineering. More specifically, it relates to a composition for preparing sustainable concrete comprising marble powder and copper slag.

BACKGROUND OF THE INVENTION

The background information herein below relates to the present disclosure but is not necessarily prior art.

Cement, sand and aggregate are basic needs of construction industry. Cement and Sand is a prime material used for preparation of concrete and which plays a major role in mix design. In India urbanization has been increased this increases the demand of natural sand in construction sector. The scarcity of river sand will affect the construction industry, hence there is a need to find the new alternative material to replace the river sand, so that excessive river erosion and harm to environment is prevented. Recycling of industrial wastes has environmental, economic and technical benefits.

The ordinary Portland cement is acknowledged to be the most widely used construction material throughout the world. The cement production is known to be one of the most environmental unfriendly processes because it releases of CO2 gases to the atmosphere. The present invention introduces the development of sustainable concrete using industrial waste copper slag as a substitute to natural sand (Fine aggregate) and marble dust powder along with metakaolin as partial replacement of ordinary Portland cement.

IN202341087902 related to a development of eco-friendly concrete with waste marble sludge. The present invention relates to development of eco-friendly concrete with waste marble sludge. The continuous development of the marble industry has led to an increase in the accumulation of waste marble sludge causing landfilling and health-associated issues. The present invention relates to waste marble sludge powder (MS) utilization as a means of controlling alkali-silica reaction (ASR) in concrete. Specimen (cubes, prisms, and mortar bars) were prepared to incorporate reactive aggregates and various proportions of MS ranging from 5% to 40% as a replacement for aggregates. Expansion and mechanical strength characteristics were determined to investigate the effectiveness of MS to control ASR for up to 150 days. Furthermore, specimens incorporating MS exhibited improved compressive and flexural strength as compared to the identical specimen without MS. Thus, it can be foreseen that the use of MS as a partial replacement of aggregates can control ASR in concrete as well as reduce the dumping and harmful emissions issue.

A method of preparation of paver block incorporation of copper slag. A composition and method for preparation of paver block incorporating copper slag consisting of cement (13.93%, 360 kg), fine aggregate (14.32%, 370kg), copper slag (13.54%, 350kg), coarse aggregate (51.86%, 1340 kg), fibrillated polypropylene fibers (0.4%, 3.64kg), water (5.80%, 150 kg) and superplasticizer (0.5%, 1.81 kg) for production of one cubic meter concrete.

OBJECTIVE OF THE INVENTION

The primary objective of the present invention is to provide a composition for preparing the sustainable concrete comprises marble powder and copper slag.

Yet another objective of the invention is to utilize industrial waste materials to create environmentally friendly concrete.

Yet another objective of the invention is to determine the optimal percentage of metakaolin, marble dust powder, and copper slag to achieve maximum strength.

Yet another objective of the invention is to develop concrete with superior strength properties compared to normal concrete.

SUMMARY OF THE INVENTION

Accordingly the following invention provides a composition for preparing sustainable concrete comprising marble powder and copper slag. this sustainable concrete composition that incorporates industrial waste materials to enhance both performance and environmental friendliness. this mix consists of cement (11.29% or 287.00 kg), metakaolin (1.10% or 28 kg), marble dust powder (1.38% or 35 kg), natural sand (21.97% or 558.35 kg), copper slag (6.9% or 175.35 kg), and a combination of 10 mm and 20 mm coarse aggregates (25.5% or 647.94 kg each). Additionally, it includes water (6.22% or 157.95 kg) and an admixture (0.14% or 3.5 kg). This carefully formulated composition maximizes the mechanical properties of concrete while minimizing reliance on traditional materials, thereby promoting sustainable construction practices.

Experimental results demonstrate that this sustainable concrete composition significantly enhances mechanical performance compared to conventional concrete. Specifically, the compressive strength increases by 15.2%, flexural strength by 18.27%, and split tensile strength by 17.22%. These improvements underscore the potential of utilizing industrial byproducts, such as metakaolin, marble dust powder, and copper slag, to create high-performance concrete. This invention not only addresses the growing need for environmentally responsible construction materials but also contributes to the effective recycling of waste products, making it a valuable advancement in the field of sustainable concrete technology.

BRIEF DESCRIPTION OF DRAWING:

Figure 1 of sheet 1 illustrates the gradation of natural sand in zone II and 20% copper slag.


DETAILED DESCRIPTION OF THE INVENTION

As used in the description herein and throughout the claims that follow, the meaning of "a," "an," and "the" includes plural reference unless the context
clearly dictates otherwise. Also, as used in the description herein, the meaning of "in" includes "in" and "on" unless the context clearly dictates otherwise.

The present invention is related to a composition for preparing the sustainable concrete comprises marble powder and copper slag to enhance environmental friendliness and mechanical properties. The developed concrete is evaluated for compressive strength, flexural strength, and split tensile strength. The invention suggests the feasibility of incorporating copper slag as a replacement for natural sand along with marble dust powder and metakaolin for the development of sustainable concrete.

In this present invention the experimental work is carried out using M30 grade of concrete. The metakaolin is used in varied percentage replacement of cement i.e 5%,8% 10%. The waste marble powder is replaced with cement by constant 10%. The Copper slag of 20% is used at a constant replacement level with natural sand. The concrete is evaluated for compressive strength, flexural strengths, split tensile strength as shown in Figure.

Table 1: Mix Proportion (%)
Mix Ordinary Portland Cement Fine Aggregate Coarse Aggregate
Cement Metakaolin Marble Dust Powder Copper slag Natural Sand 10mm 20mm
CC 100 -- -- 100 50 50
MK-05+MDP-10+CS20 85 5 10 20 80 50 50
MK-08+MDP-10+CS20 82 8 10 20 80 50 50
MK-10+MDP-10+CS20 80 10 10 20 80 50 50
MK-Metakaolin, CS-Copper Slag, MDP-Marble dust powder

Table 2: Quantity of Ingredients for 1 cubic meter of concrete (kg/m3)
Mix Ordinary Portland Cement Fine Aggregate Coarse Aggregate Water Admixture
Cement Metakaolin Marble Dust Powder Copper slag Natural Sand 10 mm 20 mm
CC 350 -- -- 701.18 650.94 650.94 158.00 3.5
MK-05+MDP-10+CS20 297.5 17.5 35 175.52 558.88 648.55 648.55 157.97 3.5
MK-08+MDP-10+CS20 287 28 35 175.35 558.35 647.94 647.94 157.97 3.5
MK-10+MDP-10+CS20 280 35 35 175.24 558.00 647.53 647.53 157.97 3.5

Compressive Strength:

The cubical specimens of size 150 mm X 150 mm X 150 mm were tested to determine the compressive strength of concrete after 7,14 and 28 days of curing as presented in Table no. 3. The compressive strength test under compression testing machine of capacity 2000KN was carried out as per IS:516-1959.

Table 3: Test Results
Mix Compressive strength
28 Days (MPa)
Flexural strength
28 Days (MPa) Split Tensile strength
28 Days (MPa)
CC 35.78 4.87 2.67
MK-05+MDP-10+CS20 37.13 5.13 2.89
MK-08+MDP-10+CS20 41.22 5.76 3.13
MK-10+MDP-10+CS20 39.23 5.22 2.98
MK-Metakaolin, CS-Copper Slag, MP-Marble powder

Flexural Strength:

The flexural strength of the beam specimen was tested by using two point loading method. The test was carried out as per (IS516:1959). The beams of size 100x100x500 mm were tested after 28 days of curing as presented in Table 3.

Split Tensile Strength:

Split tensile test on cylinder is the indirect test which was used to determine the tensile strength of concrete. The compressive force was applied under compression testing machine of 2000KN capacity on cylindrical specimen of 150mm diameter and 300mm length, such that the tensile stresses induce in the specimen and specimen fails under tensile stresses. The test was carried out as per IS: 5816-1999 and the split tensile strength after 28 days of curing are presented in Table 3.

BEST METHOD OF PERFORMING THE INVENTION:

The proposed composition to sustainable concrete, comprises of; cement (11.29%, 287.00 kg), metakaolin (1.10%, 28kg), marble dust powder (1.38%, 35kg), natural sand (21.97%, 558.35kg), copper slag (6.9%, 175.35 kg), 10mm coarse aggregate (25.5%, 647.94 kg), 20mm coarse aggregate (25.5%, 647.94 kg), water (6.22%, 157.95kg), admixture (0.14%, 3.5kg) for making of one cubic meter of concrete. This mix composition of blended sustainable concrete gives maximum strength as compared to other combination.

The compressive strength of concrete increased by 15.2% as compared to normal concrete the Flexural strength of concrete increased by 18.27% as compared to normal concrete and, the split tensile strength of concrete increased by 17.22% as compared to normal concrete.

While various embodiments of the present disclosure have been illustrated and described herein, it will be clear that the disclosure is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents will be apparent to those skilled in the art, without departing from the spirit and scope of the disclosure, as described in the claims.
, Claims:1. A composition for preparing sustainable concrete comprising marble powder and copper slag, comprising of;
11.29% of cement by weight (287.00 kg);
1.10% of metakaolin by weight (28 kg);
1.38% of marble dust powder by weight (35 kg);
21.97% of natural sand by weight (558.35 kg);
6.9% of copper slag by weight (175.35 kg);
25.5% of coarse aggregate (10 mm) by weight (647.94 kg);
25.5% of coarse aggregate (20 mm) by weight (647.94 kg);
6.22% of water by weight (157.95 kg); and
0.14% of admixture by weight (3.5 kg).

2. The composition for preparing sustainable concrete comprising marble powder and copper slag as claimed in claim 1, wherein the resulting concrete demonstrates an increase in compressive strength by at least 15.2%, flexural strength by at least 18.27%, and split tensile strength by at least 17.22% compared to conventional concrete.

3. A method for preparing sustainable concrete comprising marble powder and copper slag as claimed in claim 1, comprising the steps of;
a) Mixing 11.29% ordinary portland cement, 1.10% metakaolin, and 1.38% marble dust powder;
b) Adding 6.9% copper slag as a substitute for natural sand and thoroughly mixing;
c) Incorporating 21.97% natural sand and coarse aggregates comprising 25.5% of 10 mm particles and 25.5% of 20 mm particles;
d) Adding 0.14% admixture as a superplasticizer to the mixture;
e) Adding 6.22% water to form a concrete mix;
f) Casting the concrete mixture into molds; and
g) Curing the concrete for 28 days to achieve optimal strength properties.

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