MANUFACTURING OF INTERLOCKING BRICKS USING HEMPCRETE

Abstract

Abstract: Hempcrete blocks, a composite material made from hemp fibers, lime binder, and water, are gaining recognition as a sustainable altemative to traditional constouction materials. This paper provides an overview of hempcrete blocks, including their composition, manufacturing process, and environmental benefits. The unique properties of hempcrete, such as its low carbon footprint, excellent insulation capabilities, and breathability, make it an attractive choice for eco-conscious builders. Additionally, this abstract discusses the potential .challenges and future prospects of hempcrete blocks in the constouction industry, highlighting the importance of research and innovation in advancing sustainable building practices5

Specification

FIELD OF INVENTION:
Hempcrete is a bio-compositc material made from hemp hurds (the woody inner core of the
hemp plant), lime, and water. It's used as a building material tor insulation and construction.
Hempcrete is lightweight, breathable, and has excellent thermal properties, making it an
attractive option for sustainable building practices. It's also renewable and has a low carbon
footprint, as hemp absorbs C02 during its growth. While not as strong as traditional
concrete, hempcrete offers other benelits such as being non-toxic, fire-resistant, and resistant
to Mold and pests.
BACKGROUND OF INVENTION:
Study of Mechanical Properties for Masonry Produced Using Hemp and Lime in The fom1 of
Interlocking Blocks
Teemwat Sinsiri l, Komchai Thaiying2, and Sudniran Phetchamt 3
The results of the interlocking hempcrete test showed that the strength of hempcrete is very
low and at the same time, they arc very similar despite of the amount of hemp shiv used. The
compressive strengths were 0.38, 0.39, 0.35,. 0.35, 0.38 and 0.35 MPa for the hempcrete
blocks with l 00, 150, 200, 250, 300, and 400 grams of hemp respectively.
Physical Properties and Structure of Composite Made by Using Hemp Hurds and
Different Binding Materials
Giedrius Balciiinasa,•, Sigitas Yejelisb, Saul ius Vaitkusc, Agne Kairyte
The best thermal properties were obtained by using hemp hurds of 2.5 mm fraction, because
of formation of finely porous structure. The minimum thermal conductivity obtained using
starch binder- 0.074 W/(m·K) with the density of260 kg/m3; thermal conductivity of0.075
W/(m· K) with the density of 351 kglm3 ,\•as obtained with a cement binder.
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INTERLOCKING BRICK FOR SUSTANABLE HOUSING DEVELOPMENT
R. K. Watile(l),S. K. Deshmukhl, H.C.Muleyl
Interlocking bricks with economically available fly ash in large proportion have sufficient
strength for their use in low cost housing, non-load bearing construction and in regions where
good quality bumt clay bricks are not available. Water absorption of interlocking bricks
without GFRP is found to be in the range of 6.42 to 12.4 percent, whereas the water
absorption for ordinary burnt clay bricks should not be more than 20 percent. The water
absorption of interlocking bricks increases with the increased fly ash content.
Life cycle assessment of natural building materials: the role of carbonation, mixture
components and transport in the environmental impacts of hempcrete blocks
Alessandro Arrigoni a,*, Renata Pelosato a, Paco Melia b, Gianluca Ruggieri c, Sergio
Sabbadini d, Giovanni Dotelli a
The main source of enviromnental impacts of a wall made of hempcrete blocks is the binder
production. While the choice of a different binder would reduce some impacts and increase
others, are duction in \:1e amount of binder would in any case guarantee a substantial benetit
to the overall wall sustainability. This should be taken in to account by lime-based materials
producers, who, in most cases, consider lime as a natura land sustainable material.
Concrete Masonry Blocks Reinforced with Local Industrial Hemp Fibers and Hurds
Elie Awwad I, Dominique Choueiter2, and Helmi Khatib3.
the behaviour of hemp masonry blocks, prepared using raw (untreated) hemp material was
investigated. A control mix 0 (no hemp) and three other hemp reinforced concrete mixes
were considered. Hemp mixes I, 2, and 3 were produced based on the control mix, and by
adding 0.5, 1.0, and 1.5 Kg of hemp material, respectively. The effects of adding hemp
material on the compressive strength, water absorption, and density, in addition to thermal
conductivity were monitored.
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Hemp Concrete-A Traditional and Novel Green Building Material
Tarun Jami I, S R Karade2 and L P Singh3
With enough emphasis laid on the carbon negative nature and the various mechanical
properties of the material, it can be concluded that while hemp concrete has been in use since
several centuries ago, the traditional material has freshly acquired a futuristic status.
However, competing against technologies that enable rapid construction and reduce cost
would mean that considerable research efforts would need to be undertaken. Currently, only
one variety of hemp construction is being explored, which is the application of hemp
concrete in combination with timber studs in walls and columns.
SUMMARY:
This project main goal is to have good sustainability, insulation, durability, carbon
sequestration, versatility and health benefits. To achieve these things, we introduce the
Hempcrete. The composition of this hempcrcte has cement, lime, hemp shivcs,
OBJECTIVE:
l.Sustainability: Hempcrete blocks are a sustainable building material, as they are made from
renewable resources such as hemp fibres and lime, which have minimal environmental
impact compared to traditional concrete blocks.
2.Energy Efficiency: Hempcrete blocks offer excellent insulation properties, helping to
regulate indoor temperatures and reduce energy consumption for heating and cooling.
3.Carbon Sequestration: 1-Iempcrete blocks have the potential to sequester carbon dioxide
from the atmosphere over their lifespan, as the lime binder absorbs C02 during the curing
process, making them carbon-negative building materials.
4.Durability: 1-Iempcrete blocks are known for their durability and longevity, with the ability
to resist fire, pests, and Mold, making them suitable for a wide range of construction
applications.
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5.Breathability: Hempcrete blocks allow buildings to "breathe," promoting healthy indoor air
quality by regulating humidity levels and preventing the buildup of moisture and pollutants.
6.Low Environmental Impact: The production ofhempcrete blocks requires fewer resources
and emits less greenhouse gases compared to traditional concrete blocks, contributing to
overall environmental conservation efforts.
BRIEF DESCRIPTION OF THE PRODUCT:
Figure I: Hemp hurds, also known as hemp shives or hemp core, are the inner woody fibers
found in the stalk of the hemp plant (Cannabis sativa). After harvesting hemp for irs seeds,
fibers, or cannabinoids, the remaining stalk contains these hurd fibers. Hemp hurds are
typically separated from the outer fibers (bast fibers) and other plant materials during
processmg
Figure 2: Lime binder, commonly referred to as lime, is a type of binder used in construction
and building materials. It is derived from limestone, a naturally occurring sedimentary rock
composed nlainly of calcium carbonate . .Lime binder is produced by heating limestone to
high temperatures in a process called calcination, which drives off carbon dioxide and leaves
behind calcium oxide (quicklime).
Figure 3: An interlocking brick mould is a tool used in the manufacturing process of
interlocking bricks, which are bricks designed to fit together without the need for mortar or
adhesive. The mould typically consists of two or more sections that create the shape and
pattern of the interlocking bricks when filled with the desired building material, such as
concrete, clay, or hempcrete.
Figure 4: This figure entails the dimensions details of the product
DETAILED DESCRIPTION OF THE PRODUCT:
COMPOSITION:
Hemp Fibers: The primary component of hempcrete blocks is hemp hurds, which are the
inner woody core of the hemp plant stem. These fibers are lightweight, highly insulating, and
have excellent thermal properties.
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Lime Binder: Hempcrete blocks are bound together using lime, typically in the form of
hydrated lime or hydraulic lime. Lime acts as a binder, adhering the hemp fibers together and
providing stmctural integrity to the blocks.
Water: Water is used to activate the lime and facilitate the binding process. It is mixed with
the hemp fibers and lime to create a workable mixture.
MANUFACTURING PROCESS:
Hemp Hurds: The hemp hurds are shredded or ground to create a fibrous material that will be
the primary ingredient in the blocks.
Lime Binder: Natural hydraulic lime (NHL) is commonly used as the binder. It's mixed with
the hemp hurds to create a strong, breathable material.
Water: Water is added to the mixture to activate the lime binder and facilitate the bonding
process.
Mixing: The hemp hurds and lime binder are mixed together thoroughly, ensuring even
distribution of the lime throughout the hemp fibers.
Moullling'-The mixture is then poured into moulds or forms and compacted to create blocks
of the desired size and shaoe.
Curing: The blocks are left to cure for several weeks, allowing the lime to harden and the
blocks to become structurally stable.
Drying: After curing, the blocks are allowed to dry completely before they are ready for use
in construction.
CHARACTERISTICS:
Insulation: Hempcrete blocks offer excellent thermal insulation properties, helping to
regulate indoor temperatures and reduce heating and cooling costs.
Breathability: Hempcrete is breathable, allowing moisture to move through the material,
which can contribute to a healthier indoor environment by preventing the buildup of mold
and mildew.
Lightweight: Hempcrete blocks are lightweight compared to traditional concrete blocks,
making them easier to handle and transport.
Fire Resistance: While not as fire-resistant as concrete, hempcrete does have some fireretardant
properties due to the high silica content in hemp fibers.
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CLAIMS
We claim
I. A method for manufacturing interlocking bricks using hempcrete, comprising blending
hemp fibers, lime binder, and water to fom1 a homogenous mixture.
2. The method of claim l, wherein the hemp fibers are sourced from industrial hemp plants
and processed to achieve desired dimensions and characteristics.
3. A process for fom1ing interlocking bricks from the hempcrete mixture, involving
compression within mould to shape the bricks and facilitate interlocking features.
4. The process of claim 3, wherein the compression is achieved through mechanical or
hydraulic means to ensure uniformity and structural integrity of the interlocking bricks.
5. An apparatus for manufacturing interlocking bricks using hempcrete, comprising mould
with interlocking patterns and pressing mechanisms for shaping the bricks.
6. The apparatus of claim 5, further comprising heating elements or curing chambers to
'facilitate the curing process of the hempcrete interlocking bricks.
7. A method fo~ controlling the moisture content and curing time of hempcrete interlocking
bricks during manufacturing, optimizing strength and durability.
8. The method of claim 7, utilizing temperature and humidity control systems within curing
chambers or designated environments to regulate curing conditions.
9. A process for integrating reinforcing materials, such as steel or fiberglass, into hempcrete
interlocking bricks to enhance structural stability and load-bearing capacity .
10. The process of claim 9, incorporating reinforcing materials during the mixing stage or
embedding them within the hempcrete interlocking bricks during formation for optimal
reinforcement.

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