AU2021100390A4

AU2021100390A4 - A Method and mix proportion of concrete for rigid pavement containing single used polythene bags

Info

Publication number: AU2021100390A4
Application number: AU2021100390A
Authority: AU
Inventors: 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: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-04-22
Anticipated expiration: 2029-01-21

Abstract

The present invention relates to a method of preparation of rigid pavement. The object of the proposed invention is to utilize single used polythene bags in the preparation of sustainable rigid pavement. The composition for preparation of concrete mix for sustainable rigid pavement comprises of cement (18.25%, 435 kg), fine aggregate (26.64%, 635 kg), 10 mm coarse aggregate (18.33%, 437 kg), 20 mm coarse aggregate (27.48%, 655 kg), single used polythene bags (2.0%, 47.6 kg) and water (7.30%, 174 kg) for production of one cubic meter concrete for sustainable rigid pavement. This sustainable rigid pavement have unique feature of improved flexural resistance, abrasion resistance, freeze-thaw durability factor, flexural toughness factor and low drying shrinkage strain which will restrict the early formation of cracks. 1 3/1 45 40 25 2 0 25 O%SUPB 2%SUPB Figure 1 6.0 5 ID 4.0 3 2~0 0-0 OSupe 2%$UPS Figure 2

Description

3/1

45 40

25 2 0

25

O%SUPB 2%SUPB

Figure 1

6.0

5 ID

4.0

3 2~0

0-0 OSupe 2%$UPS

Figure 2

A Method and mix proportion of concrete for rigid pavement containing single used polythene bags

Technical field of invention:

[001] Present invention in general relates to the field of civil engineering and more particularly to a method of preparation of sustainable rigid pavement by utilizing single used polythene bags.

Background of the invention:

[002] Roads are essential features of the transport medium and always attract to researcher for exploring innovative solution in this direction. Rigid pavement is constructed for smooth riding, durable and serviceable structure to withstand the vehicular load acting over it. These types of pavements should have sufficient flexural strength to transmit the vehicular load to a wider area below. In the rigid pavement, load is generally distributed by the slab action hence higher toughness in flexural is also required. Rigid pavements should have high durability factor and low shrinkage strain to withstand all possible environment impact.

[003] Rigid pavement, often called concrete pavement are constructed by Portland cement concrete of higher grade so that these types of pavement can resist all possible loads and can withstand in extreme weathering conditions.

[004] Due to ecological reasons, recycling of waste product has been encouraged throughout the world. On the other hand, construction industry is searching new sustainable material, which may be long lasting. In the construction, concrete is most widely used component due to its advantages. Simultaneously, disposal of single used polythene bags in the environment is very dangerous for living entities. For last few years, most single used polythene bags leave into the free environment which stuck the into drains, water bodies, farms, roads etc and cause a terrible problem for the human health and environment. In the direction of consumption of single used polythene bags in concrete will be good effort to produce a more efficient material i.e. rigid pavement.

[005] For satisfying the requirement various attempts are made for providing various means for utilization of single used polythene bags for making concrete rigid pavement and therefore few of them are such as- 201621026010 discloses recycling of waste plastics for manufacture of pavement & kerb blocks, slabs and bricks, 201741025033 discloses utilization of waste plastics in pavement block, US 8545748b2 discloses building bricks including plastics, WO 2017093822al discloses process for construction of artificial roads, walk ways, footpaths, etc. from waste plastic, plastic type resins and related polymers, WO 2017093821al discloses multi-purpose module or container or block prepared from mixed waste plastic, plastic type resins and related polymer, US 5702199a discloses plastic asphalt paving material and method of making same

[006] The prior art discussed above undergo at least all or any of the following disadvantages such as they do not provide composition that provide sustainable rigid pavement utilizing single used polythene bags. 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 improved flexural resistance and abrasion resistance. They also do not provide a composition for sustainable rigid pavement having an improved freeze-thaw durability factor. Most of the invention did not consider flexural '0 toughness factor and drying shrinkage strain as evaluation parameter for sustainable rigid pavement.

[007] Consequently, none of method is available in prior art utilizing single used polythene bags in shredded form in concrete rigid pavement. And, there is a vital need of eco-efficient sustainable material which can overcome the adverse issues related to waste management of single used polythene bags which is very difficult for local bodies or governments as polythene bags cannot easily biodegradable. However such type of single used polythene bags can be recycled. Hence, the present invention provides a method of preparation of sustainable rigid pavement utilizing single used polythene bags.

Object of the invention:

[008] Primary object of the present invention is to provide a method of preparation of sustainable rigid pavement.

[009] Another object of the present invention is to provide a method for utilization of single used polythene bags in preparation of rigid pavement.

[0010] Yet another object of the present invention is to provide a sustainable rigid pavement having an improved flexural resistance, abrasion resistance and freeze-thaw durability factor.

[0011] Other objects, features and advantages will become apparent from detail description and appended claims to those skilled in art.

Summary of the invention:

[0012] Accordingly following invention provides a method of preparation of rigid pavement. The present invention provides a method of utilizing 2% single used polythene bags in shredded form in the preparation of sustainable rigid pavement. The composition for preparation of concrete mix for sustainable rigid pavement comprises of cement (18.25%, '0 435 kg), fine aggregate (26.64%, 635 kg), 10 mm coarse aggregate (18.33%, 437 kg), 20 mm coarse aggregate (27.48%, 655 kg), single used polythene bags (2.0%, 47.6 kg) and water (7.30%, 174 kg) for production of one cubic meter concrete. Freshly prepared mix concrete is poured in casting moulds and vibrate using table vibrator. After vibration, casting mould are left in free environment for next 24 hrs then casting moulds are de-molded and are kept in water tank for 28 days curing. The specimens are tested after 28 days of standard curing.

Brief description of drawing:

[0013] This invention is described by way of example with reference to the following drawing where,

[0014] Figure 1 of sheet 1 shows graphical representation of the compressive strength of conventional concrete (0% single used polythene bags) and concrete containing 2% single used polythene bags of total weight of concrete.

Where, 1 denotes percentage of single used polythene bags, 2 denotes Compressive strength (N/mm 2).

[0015] Figure 2 of sheet 1 shows graphical representation of the flexural strength of conventional concrete (0% single used polythene bags) and concrete containing 2% single used polythene bags of total weight of concrete. Where, 1 denotes percentage of single used polythene bags, 3 denotes Flexural strength (N/mm2).

[0016] Figure 3 of sheet 2 shows graphical representation of the abrasion resistance in terms of loss of thickness of conventional concrete (0% single used polythene bags) and concrete containing 2% single used polythene bags of total weight of concrete. Where, 1 denotes percentage of single used polythene bags, 4 denotes abrasion resistance in terms of loss of thickness (mm).

[0017] Figure 4 of sheet 2 shows graphical representation of the freeze-thaw durability factor '0 of conventional concrete (0% single used polythene bags) and concrete containing 2% single used polythene bags of total weight of concrete. Where, 1 denotes percentage of single used polythene bags, 5 denotes freeze-thaw durability factor (%).

[0018] Figure 5 of sheet 3 shows graphical representation of the flexural toughness factor of conventional concrete (0% single used polythene bags) and concrete containing 2% single used polythene bags of total weight of concrete. Where, 1 denotes percentage of single used polythene bags, 6 denotes flexural toughness factor (x10-4 MPa).

[0019] Figure 6 of sheet 3 shows graphical representation of the drying shrinkage strain of conventional concrete (0% single used polythene bags) and concrete containing 2% single used polythene bags of total weight of concrete. Where, 7 denotes percentage of single used polythene bags, 8 denotes drying shrinkage factor (x10-6 mM).

[0020] 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 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:

[0021] The present invention relates to a method of preparation of rigid pavement. The proposed invention provides a method of preparation of sustainable rigid pavement by utilizing single used polythene bags.

[0022] The proposed method provides utilization of single used polythene bags in shredded form in the preparation of a sustainable rigid pavement. This rigid pavement formulation are produced using single used polythene bags of 2% of total weight of concrete in addition to its normal ingredient materials such as cement, fine aggregate, coarse aggregates.

[0023] In the proposed method cement, fine aggregates, coarse aggregates, water and single used polythene bags utilized to produce sustainable concrete mixes. The concrete mix design of M30 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.

[0024] Table 1: Proportion of material to produce one cum of sustainable concrete Typeof Cement Fine 10mm 20mm Single Water concrete (Kg) aggregate Coarse Coarse used (Kg) (Kg) aggregate aggregate polythene (Kg) (Kg) bags(Kg)

Conventional 435 635 437 655 0.00 174 concrete Sustainable concrete containing 2% single 435 635 437 655 47.6 174 used polythene bags

[0025] In the preferred embodiment, the composition for preparation of concrete mix for sustainable rigid pavement comprises of cement (18.25%, 435 kg), fine aggregate (26.64%, 635 kg), 10 mm coarse aggregate (18.33%, 437 kg), 20 mm coarse aggregate (27.48%, 655 kg), single used polythene bags (2.0%, 47.6 kg) and water (7.30%, 174 kg) for production of one cubic meter concrete.

[0026] Yet in the proposed method the single used polythene bags are shredded into fiber form. Before shredding, single used polythene bags are properly cleaned using water. These water cleaned shredded single used polythene bags are washed with sodium hydroxide (IM NaOH) to increase the hydrophilicity of the polythene bags particle surface.

[0027] Mixing of shredded single used polythene bags are carried out into three steps. In first step, 25% single used polythene bags aere mixed with dry ingredients (cement, fine aggregate, coarse aggregate). In next step, 25% single used polythene bags are mixed at the time of mixing of water. In the last step, rest 50% single used polythene bags are mixed at the time of casting of rigid pavement. These mixing process leads to better effect on mechanical as well as ductility properties.

[0028] In the further process freshly prepared mix concrete is poured in casting moulds and vibrate using table vibrator. After vibration, casting mould are left in free environment for next 24 hrs then casting moulds are de-molded and are kept in water tank for 28 days curing. The specimens are tested after 28 days of standard curing.

[0029] Therefore the prepared product is tested in laboratory first for compressive strength, flexural strength, abrasion resistance, freeze-thaw durability factor, flexural toughness factor and shrinkage strain. In the testing, it is observed that compressive strength of concrete containing 2% shredded single used polythene bags is reduced by only 7.14% at 28 days, in comparison of the conventional concrete as shown in Figure 1 however as per IS 456:2000 and IS 10262:2009 the acceptance value of compressive strength is achieved. The decrease in compressive strength is attributed to loss of adherence between the polythene fibers and cement matrix. Flexural strength of this modified concrete increased by 4.24% as shown in Figure 2 and abrasion resistance is also increased by 9.22% as shown in Figure 3 which is within the permissible limit as per Indian Standard IS 1237: 2012. At the same time, freeze thaw durability factor was increased 10.14% when these shredded single used polythene bags is incorporated in modified concrete shown in Figure 4. Significant increase in flexural toughness factor i.e. 56.25% is also observed an important parameter of sustainable rigid pavement shown in Figure 5. Drying shrinkage strain is decreased by 1.65% for this modified concrete which is also a positive sign (Figure 6). This type of single used polythene bags has the further advantages of decreasing cracking due to elastic properties of polythene bags.

[0030] Table 2: Test results of sustainable rigid pavement with 2% single used polythene bags Test Results of conventional Result of modified concrete concrete Compressive strength 44.82 MPa 41.62 MPa (Figure 1) (Figure 1) Flexural strength 4.72 MPa (Figure 2) 4.92 MPa (Figure 2)

Abrasion resistance 1.41mm (Figure 3) 1.28mm (Figure 3) Freeze-Thaw durability 0.69% (Figure 4) 0.76% factor (Figure 4) Flexural toughness 1.60x10-4 MPa (Figure 5) 2.50x10-4 MPa (Figure 5)

Shrinkage strain at 365 182x10-6 mm (Figure 6) 179x10-6 mm (Figure 6) days

[0031] Therefore in the preferred embodiment it is confirmed that the 2% single used waste polythene bags of total volume in sustainable rigid pavement for roads can be used without much affecting the compressive strength whereas other properties are improved a lot.

[0032] 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 2021100390 THERE IS ONE PAGE OF CLAIMS ONLY THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:

1. A method for preparation of sustainable rigid pavement consisting of cement 18.25%, fine aggregate 26.64%, 10 mm coarse aggregate 18.33%, 20 mm coarse aggregate 27.48%, single used polythene bags 2.0% and water 7.30%.

2. The method for preparation of sustainable rigid pavement as claimed in claim wherein said rigid pavement of prepared through following steps;

a) first single used polythene bags are properly cleaned using water; b) then shredded into fiber form; c) these water cleaned shredded single used polythene bags are washed with sodium hydroxide (IM NaOH) to increase the hydrophilicity of the polythene bags particle surface; d) 25% single used polythene bags are mixed with dry ingredients (cement, fine aggregate, coarse aggregate); e) in next step, 25% single used polythene bags are mixed at the time of mixing of water; f) finally rest 50% single used polythene bags are mixed at the time of casting of rigid pavement; g) further freshly prepared mix concrete is poured in casting moulds and vibrate using table vibrator; h) after vibration, casting mould are left in free environment for next 24 hrs then casting moulds are de-molded and are kept in water tank for 28 days curing.

3. The method for preparation of sustainable rigid pavement as claimed in claim 1 wherein 2 % single used polythene bags of total weight of concrete in addition to its normal ingredient materials is used.