AU2020102838A4

AU2020102838A4 - Method of preparation of conplas paver block utilizing waste polythene bags

Info

Publication number: AU2020102838A4
Application number: AU2020102838A
Authority: AU
Inventors: Sandeep Chaudhary; Trilok Gupta; Sudhir Jain; Ravi Kumar Sharma
Original assignee: College of Technology and Engineering Maharana Pratap University of Agriculture and Technology Mpuat Udaipur
Current assignee: College of Technology and Engineering Maharana Pratap University of Agriculture and Technology Mpuat Udaipur
Priority date: 2020-10-18
Filing date: 2020-10-18
Publication date: 2020-12-17
Anticipated expiration: 2028-10-18

Abstract

The present invention relates to a method of preparation of paver block utilizing waste polythene bags. The object of the proposed invention is to utilize sustainable waste material and analogously minimizing the consumption of fine aggregate by replacing it with waste polythene bags in shredded form. The composition for preparation of sustainable conplas paver blocks comprises of cement (17.15%, 416.67 kg), fine aggregate (26.79%, 650.95kg), coarse aggregate (48.15%, 1170kg), waste polythene bags (1.71%, 41.55kg) and water (6.19%, 150.5kg) for production of one cubic meter concrete. Conplas paver blocks have unique feature of high impact resistance and energy absorption capacity. Following invention is described in detail with the help of Figure 1 of sheet 1 showing schematic presentation with dimensions of the sustainable conplas paver block. 1 1/4 250 250 801 Figure 1 10 8 6 4 2 0 0 10 20 30 40 50 2 Figure 2

Description

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METHOD OF PREPARATION OF CONPLAS PAVER BLOCK UTILIZING WASTE POLYTHENE BAGS

Technical field of invention:

[001] Present invention in general relates to the field of concrete paver blocks and more particularly to a method of preparation of sustainable paver block by utilizing waste polythene bags.

Background of the invention:

[002] Paver blocks are the most commonly used unreinforced concrete products increasingly used in many application i.e. footpath, flooring, landscaping, bus stop, industries etc. because of durability and flexibility in fixing. Hence, consumption of river sand is also increasing in analogous to the production of paver blocks. Extraction of river sand at such high rate has adverse impact on the rivers, deltas, marine ecosystems, biodiversity, water turbidity, water table levels, and landscape and on climate.

[003] Disposal and accumulation of daily uses plastic waste is another huge problem in the existing scenario. Destroying and disposal of polythene waste in environment lead to emission of dangerous gases in the course of incineration, decreased fertility of land and water percolation. Thus the proposal of mixing of polythene bags in concrete as sand replacement will become good alternative choice to minimize the adverse impact of excessive sand mining on the environment and environment effective approach for disposal of daily uses of waste polythene bags.

[004] For satisfying the requirement various attempts are made for providing various means for utilization of plastics for making concrete paver blocks and therefore few of them are discussed below.

[005] W02017093821A1 discloses multi-purpose module or container or block prepared from mixed waste plastic, plastic type resins and related polymer. A multi-purpose module /container/ block comprising the hollow module /container/ block of mixed waste plastic, plastic type resins and related polymer filled with filling material such as road paving mixture or concrete or bitumen or asphalt or similar material.

[006] US20120047833A1 discloses building bricks including plastics. A brick comprises a thermoplastic material, such as high density polyethylene (HDPE), and a cement-containing material. The brick may be made by mixing thermoplastic material and dry, uncured cement containing material. This mixture is placed in a mold. The mold is heated while the mixture is compressed to melt or soften the thermoplastic material and to bind the particulate material in the mold into the shape of a brick. After the hardened brick is removed from the mold, the surface of the brick may be sprayed with water to cure cement containing material on the surface of the brick.

[0071 US5702199A discloses plastic asphalt paving material and method of making same. An asphaltic concrete or paving material includes from 5 to 20 percent or more of granular recycled plastic, which supplements or replaces the rock aggregate component of the mixture. The material produces a structurally superior paving material and longer lived roadbed. The paving material includes any and all residual classes of recyclable plastic, including thermosetting plastics and other plastics having little to no current widespread utility. The material produces roadbeds of higher strength with less total asphalt thickness and having '0 greater water impermeability, and is most useful for all layers below the surface layer. The recyclable plastic component of the material is preferably a mixture of all recyclable classes through, or of those materials from such classes from which potentially more valuable recyclable materials have been selectively removed.

[008] The paving product is preferably formed by a process of shredding or mechanically granulating used and industrial waste plastic to a no. 4 to 1/2 inch sieve size, and preferably to 1/4 inch to 3/8 inch granules. The granules are then treated with a reducing flame, with a plasma flame process, to activate the surface of the granules and increase the surface tension without raising the temperature of the plastic. The activated treated granules are then added to the aggregate and mixed with the asphalt to produce the paving material.

[009] US20170088463A1 discloses recycled plastic aggregate for use in concrete. The synthetic recycled plastic aggregate for use in concrete is a composite material containing between 30% and 50% by weight shredded recycled plastic, the balance being filler embedded in a matrix of the recycled plastic. The recycled plastic includes polyethylene terephthalate (PET). The filler can include dune sand, fly ash and quarry fines. The synthetic recycled plastic aggregate is best used to make concrete with a water-to-cement ratio of at least 0.5.

[0010] US6488766B2 discloses aggregate using recycled plastics. The invention comprises an aggregate for use in cementitious building materials which successfully incorporates plastic such as recycled plastic scrap of diverse types and a abrasive, inorganic grit particles. The plastic scrap is impregnated with grit, such as sand, glass or other inorganic material. The plastic will then bond satisfactorily with a ark cementitious binder. Impregnation is accomplished by heating the plastic in particulate form, the grit or both, then mixing the plastic and grit. The aggregate can be reinforced by the addition of metallic or artificial fibers. Optionally, the aggregate can be formed with gas filled voids by adding sodium bicarbonate or borax during the heating process or by using plastics which "off-gas" during heating. In a further option, adhesive can be added to the cementitious mix, thereby fusing plastic particles together such that a skeleton providing reinforcement or support is formed in the cured aggregate.

[0011] The prior art discussed above undergo at least all or any of the following '0 disadvantages such as they do not provide composition that maximum minimizes the consumption of sand. Most of them use chemical activators and plasticizer that are not efficient. They do not provide a composition and method that eliminates the use of special techniques and method for desired results, hence utilizes energy and time and are not efficient. They do not provide abrasive resistance paver blocks. Most of them unable to provide paver blocks with high impact resistance. Most of them are fails to provide a method of manufacturing a paver blocks that has high energy absorption capacity and abrasion resistance.

[0012] Consequently, none of method is available in prior art utilizing waste polythene bags in shredded form as fine aggregate replacement in concrete paver blocks. And, there is a vital need of eco-efficient sustainable material which can overcome the adverse issues related with extraction of excessive sand mining by reducing its consumption and disposal and accumulation problem related with plastic waste. Hence, the present invention provides a method of preparation of paver block utilizing waste polythene bags.

Object of the invention:

[0013] Primary object of the present invention is to provide a method for utilization of waste polythene bags in preparation of sustainable conplas paver blocks.

[0014] Another object of the present invention is to minimize the consumption of sand by replacing it with sustainable waste material (waste polythene bags).

[0015] Yet another object of the present invention is to provide a conplas paver blocks having an improved abrasion resistance and impact resistance property.

[0016] Yet another object of the present invention is to provide a conplas paver blocks having an improved energy absorption capacity.

[0017] Other objects, features and advantages will become apparent from detail description and appended claims to those skilled in art.

Summary of the invention:

[0018] Accordingly following invention provides a method of preparation of paver block utilizing waste polythene bags. The proposed method provides a sustainable conplas paver block by partially replacing the fine aggregate with waste polythene bags in shredded form. The composition for preparation of sustainable conplas paver blocks comprises of cement (17.15%, 416.67 kg), fine aggregate (26.79%, 650.95kg), coarse aggregate (48.15%, 1170kg), waste polythene bags (1.71%, 41.55kg) and water (6.19%, 150.5kg) for production of one cubic meter concrete. The concrete mix design of M40 grade is made as per the guidelines of Indian standards IS 10262: 2009 and IS 456: 2000. Freshly prepared mix concrete is poured in paver block molds and pre-compressed using hydraulic pre compression machine. After pre-compression, the paver blocks are de-molded and are kept for 24 hours at room temperature. The paver blocks are tested after 28 days of standard curing.

Brief description of drawing:

[0019] This invention is described by way of example with reference to the following drawing where,

[0020] Figure 1 of sheet 1 shows schematic presentation with dimensions (mm) of the conplas paver block.

[0021] Figure 2 of sheet 1 shows graphical representation of the compressive strength of conventional concrete paver block and conplas paver block with waste polythene bags as partial replacement of fine aggregate.

Where, 1 denotes Replacement level of fine aggregate by waste polythene bags, 2 denotes Compressive strength (N/mm 2

[0022] Figure 3 of sheet 2 shows graphical representation of the abrasion resistance in term of depth of wear (mm) of conventional concrete paver block and conplas paver block with waste polythene bags as partial replacement offine aggregate. Where, '0 1 denotes Replacement level of fine aggregate by waste polythene bags, 3 denotes abrasion resistance in terms of loss of thickness (mm).

[0023] Figure 4 of sheet 2 shows graphical representation of the water absorption value of conventional concrete paver block and conplas paver block with waste polythene bags as partial replacement of fine aggregate. Where, 1 denotes Replacement level of fine aggregate by waste polythene bags, 4 denotes water absorption (%).

[0024] Figure 5 of sheet 3 shows graphical representation of the impact resistance value of conventional concrete paver block and conplas paver block with waste polythene bags as partial replacement of fine aggregate. Where, 1 denotes Replacement level of fine aggregate by waste polythene bags,

5 denotes impact resistance (Joule).

[0025] Figure 6 of sheet 3 shows graphical representation of the energy absorption capacity value at first crack of conventional concrete paver block and conplas paver block with waste polythene bags as partial replacement offine aggregate. Where, 1 denotes Replacement level of fine aggregate by waste polythene bags, 6 denotes energy absorption capacity at first crack (N.m).

[0026] Figure 7 of sheet 4 shows graphical representation of the energy absorption capacity value at ultimate crack of conventional concrete paver block and conplas paver block with waste polythene bags as partial replacement offine aggregate. Where, 1 denotes Replacement level of fine aggregate by waste polythene bags, 7 denotes energy absorption capacity at ultimate crack (N.m).

[0027] In order that the manner in which the above-cited and other advantages and objects of the invention are obtained, a more particular description of the invention briefly described above will be referred, which are illustrated in the appended drawing. Understanding that '0 these drawing depict only typical embodiment of the invention and therefore not to be considered limiting on its scope, the invention will be described with additional specificity and details through the use of the accompanying drawing.

Detailed description of the invention:

[0028] The present invention relates to a method of preparation of paver block utilizing waste polythene bags. The proposed invention provides a sustainable conplas paver block utilizing waste polythene bags as partial replacement of fine aggregate. Hence, consumption of fine aggregate is decreased which saves the natural resources and save the environment. Further, waste polythene bags will be reduced as waste polythene bags are available in abundance which creates the various environmental problems.

[0029] In the proposed method cement, fine aggregates, coarse aggregates, water and waste polythene bags utilized to produce sustainable concrete mixes. The concrete mix design of

M40 grade is made as per the guidelines of Indian standards IS 10262: 2009 and IS 456: 2000. Proportions of various ingredients are shown in Table 1.

[0030] The composition for preparation of sustainable conplas paver blocks comprises of cement (17.15%, 416.67 kg), fine aggregate (26.79%, 650.95kg) coarse aggregate (48.15%, 1170kg), waste polythene bags (1.71%, 41.55kg) and water (6.19%, 150.5kg) for production of one cubic meter concrete.

[0031] Table 1: Proportion of material to produce one cum of sustainable concrete Type of paver block Cement Fine aggregate Coarse Waste Water (Kg) (Kg) aggregate (Kg) Polythene (Kg) Bags (Kg) Conventional paver 416.67 692.50 1170 0.00 150.5 block Sustainable conplas paver block (2% 416.67 678.65 1170 13.85 150.5 waste polythene bags) Sustainable conplas paver block (4% 416.67 664.80 1170 27.70 150.5 waste polythene bags) Sustainable conplas paver block (6% 416.67 650.95 1170 41.55 150.5 waste polythene bags) Sustainable conplas paver block (8% 416.67 637.10 1170 55.40 150.5 waste polythene bags) Sustainable conplas paver block (10% 416.67 623.25 1170 69.25 150.5 waste polythene bags)

[0032] In the further process freshly prepared mix concrete is poured in paver block moulds and pre-compressed using hydraulic pre-compression machine. After pre-compression, the paver blocks are de-moulded and are kept for 24 hours at room temperature. The paver blocks are tested after 28 days of standard curing. According to Indian Standard IS 15658:2006, paver blocks are tested for compressive strength, abrasion resistance, water absorption, impact resistance, energy absorption capacity at first and ultimate crack.

[0033] Compressive strength of sustainable conplas paver block is decreased for all replacement level however as per IS 456:2000 and IS 15658:2006 the acceptance value of compressive strength is achieved upto 6% replacement of fine aggregate by waste polythene bags (Figure 2). At the same replacement level abrasion resistance of sustainable conplas paver block is within the permissible limit as per Indian Standard IS 1237: 2012 (Figure 3). The value of water absorption was less than 6% as per IS 15658:2006 for all replacement levels (Figure 4). Impact resistance and energy absorption capacity of conplas paver blocks at first crack and ultimate cracks is much higher than conventional concrete paver blocks (Figure 5-7). The test results of sustainable conplas paver block at 6% waste polythene bags are shown in Table 2.

[0034] Table 2: Test results of sustainable conplas paver block with 6% Waste Polythene Bags Test Result Requirement as per Indian standards Compressive strength 46.50 MPa 30 MPa - 55MPa (IS 15658:2006) (Figure 2) Abrasion resistance 1.32mm 2 mm (IS 1237:2012) (Figure 3) Water absorption 0.79% 6% (IS 15658:2006) (Figure 4) Impact resistance 112.50 Joule (Figure 5) Energy absorption capacity at first 1689 N.m crack (Figure 6) Energy absorption capacity at 2026 N.m ultimate crack (Figure 7)

[0035] In the preferred embodiment it is confirmed that the 6% replacement of fine aggregate by waste polythene bags in conplas paver blocks for medium traffic roads can be used without much affecting the compressive strength and where 10% waste polythene bags can be used in conplas paver blocks for light traffic roads like as domestic drives and public gardens.

[0036] Additional advantages and modification will readily occur to those skilled in art. Therefore, the invention in its broader aspect is not limited to specific details and representative embodiments shown and described herein. Accordingly various modifications may be made without departing from the spirit or scope of the general invention concept as defined by the appended claims and their equivalents.

Claims

EDITORIAL NOTE 2020102838 There is one page of claims only THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:

1. Method for preparation of conplas paver block utilizing waste polythene bag, characterized in that;

a) composition for preparation of sustainable conplas paver blocks comprises of cement (17.15%, 416.67 kg), fine aggregate (26.79%, 650.95kg) coarse aggregate (48.15%, 1170kg), waste polythene bags (1.71%, 41.55kg) and water (6.19%, 150.5kg) for production of one cubic meter concrete;

b) then freshly prepared mix concrete is poured in paver block moulds and pre compressed using hydraulic pre-compression machine;

c) after pre-compression, the paver blocks are de-moulded and are kept for 24 hours at room temperature.