Experimental Investigation on Making of Plastic Brick

DOI : 10.17577/IJERTV12IS050016

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Experimental Investigation on Making of Plastic Brick

Mr. Pandhre S.B, Mr. Sonal Kumar, Mr. Zaman Raza, Mr. Vishal Kumar, Mr. Krishna Kumar, Mr. Amit Kumar, Mr.Vivek Kumar

Civil Engineering Department, A.G.Patil Polytechnic Institute

Opp.SRP Camp, Vijapur Road, Solapur 413003.

Abstract The plastic waste is the hazardous problem in todays world. This is most dangerous problem in front of humanity. The most hazardous type of wastes are LDPE and PTE and the plastic below 50micron is also causing a serious problem. These plastic mixed in the soil, it directly effects on fertility of the soil. Nowadays, the large amount of plastic is deposited into sea. This plastic wastes gives hazardous effect on the aquatic life and quality of seawater also polluted by this plastic. So, we try to finding efficient way to solve this problem of plastic waste. So, we added this plastic wastes into the bricks and create the bricks by using plastic wastes. It is most economical solution present in the construction industry and it is also economical and environment friendly solution of the plastic wastes. The bricks produced are light weight, have smooth surface and fine edges, do not have cracks and have high crushing strength and very low water absorption. The bricks are manufactured by heating waste plastic to temperature range of 150 to 200 degree centigrade and mixing sand to the molten plastic.

KeywordsLDPE, CTM, PTE ,Water Absorption


Low density polyethylene (LDPE) is the most common packaging material used worldwide and is used for packaging a variety of products. It is also used for making containers and bottles. However they pose great threat to the environment as their effective disposal is a herculean task. They are not easily degradable; it usually takes more than ten decades to decompose. As a result, they clog water ways, channels and drains. As they require many years to decompose, they fill up the landfills faster. Polythene bags and packaging sheets harm aquatic life and wildlife as they pose the threat of chocking if ingested. Low density polythene can be reused for making bricks. Bricks are the basic components of a building and are required in bulk.

By using plastic in making the brick, the overall cost of the brick will get reduced as, waste polyethylene is being reused. Brick earth is costly, and digging of brick earth poses some damage to the environment. Hence using plastic to make bricks is not only cost effective and ecofriendly but also the plastic bricks have a smooth finish, devoid of cracks and have low water absorption value, and will not have problems like efflorescence & Dampness of wall in future.



    • SAND


    • Collection of Materials.

    • Batching.

    • Melting.

    • Mixing.

    • Moulding.

    • Curing.

Collection of Materials:

The plastic material should be collected from the factories waste and Canteen waste, Grocery Polythene bags & Stationary waste and also food packages and plastic bottles this will come under the LDPE plastic type


Measurement of materials for making brick is called batching. After collection of materials, we separate the types of plastic and remove any other waste presented in the collected material and check that any water content in in sample collected ten proceed for remove the moisture content by atmosphere

Usually a common brick is made from clay & approximately 3kg of clay is used to make a clay brick. We are taking 70:30 ratio of plastic brick to plastic waste and sand respectively. i.e. 2.1Kg Plastic waste & 0.9kg per plastic brick

Melting of plastic waste:-

After completion batching the plastic waste was taken for burning in which the plastic bags are drop one by one into the container and allowed to melt. These would be done in closed vessel because to prevent the toxic gases released into atmosphere. These will be at the temperature of 150-200 degrees centigrade


As per Proportion (70 % Plastic bags & 30 %) River sand mixing of materials is essential for the production of uniform and strength for brick. The mixing has to be ensuring that the mass becomes homogeneous, uniform in color and consistency. Generally, there are two types of mixing, Hand mixing and mechanical mixing. In this project, we adopted hand mixing. Until the entire plastic content required for making plastic brick of one mix proportion is added into it. Then these plastic liquids thoroughly mixed by using trowel before it hardens. The mixture has very short setting bags are turned to molten state; the river sand is added to it. The sand added is mixed time. Hence mixing process should not consume more time.

Moulding & De-moulding

After completion of proper mixing, we place mix into required mould. In these projects we use the normal brick sizes (19x9x9 cm). After 1Hrs remove the brick from the mould and then done curing

Moulding of Plastic Brick De-Moulding of Plastic Brick

Curing: –

The test specimens after moulding were allowed to dry for a period of 01hours. The specimens were kept in curing tank and allowed to cooling purpose for a period of 3hrs.






Testing of Plastic Brick & Comparison of normal Clay Brick.

Water absorption test

Water absorption test on bricks is conducted to determine durability property of bricks such as degree of burning, quality and behavior of bricks in weathering. A brick with water absorption of less than 7% provides better resistance to damage by freezing. The degree of compactness of bricks can be obtained by water absorption test, as water is absorbed by pores in bricks. The water absorption by bricks increases with increase in pores. So, the bricks, which have water absorption less than 3 percent can be called as vitrified.

Water Absorption of Plastic Brick

Sample 1

Sample 2

Sample 3

Avg. Water Absorption (%)





Plastic Brick Specimen (Frog fill-up 1:3 Mortar Proportion)

Plastic Brick immersion in Water for 24Hrs

Calculation of Water Absorption of Bricks

Water absorption, % by mass, after 24 hours immersion in cold water in given by the Formula

M1= Weight of dry brick

M2= Weight of moist brick (After water Absorption) W = Water Content %

Sample 1 W= 1682-1673

1673 *100

Sample 2

W= 1350-1323 1323

W= 2.04 %


Sample 3

W= 1370-1350 1350

W= 1.48 %


W= 0.537 %


Water absorption of the given bricks = 1.35 %

Compressive strength test

Compressive strength test on bricks is carried out to determine the load carrying capacity of bricks under compression with the help of compression testing machine. Bricks are generally used for construction of load bearing masonry walls, columns and footings. These load bearing masonry structures experiences mostly the compressive loads. Thus, it is important to know the compressive strength o bricks to check for its suitability for construction.


Compression testing machine, the compression plate of which shall have ball seating in the form of portion of a sphere center of which coincides with the center of the plate

Compressive strength sample with fill-up frog

Dimension of plastic Brick

Compressive Strength of Plastic Brick

Compressive Load on Plastic Brick


Compressive Strength of Bricks = Maximum Load at Failure (P)/ Area of brick (mm2)

Sample No 01= Load=92KN=92000N Sample No 02= Load=102KN=132100N Sample No 03= Load=126KN=156800N

Sample 1 Stress= P A

= 92000 (230*100)

= 4.00N/mm2

Sample 2 Stress= P














= 132100 (230*100)

= 5.22N/mm2

Sample 3 Stress= P A

= 156800 (230*100)

= 6.19N/mm2

Compressive Strength of Plastic Brick

Sample 1

Sample 2

Sample 3

Avg. Comp Strength (N/mm2)






Average compressive strength of plastic bricks = 5.13N/mm2

Hardness & Toughness test

Hardness test is done to check hardness of brick. This is an indirect test to know its compressive strength and to know how well the brick is kilned. This is tested by using a sharp tools or finger nail and scratching against the brick surface. If there is no impression of the scratch on the brick surface, the brick is sufficiently hard and fit for use

Procedure of hardness test

Make a scratch on the bricks with your finger or with anything with sharp edges like a nail. If there is Impression on brick then it is said to be hard brick.

(No Scratch of plastic brick so brick is hard)

Toughness test



Clay brick

Plastic Brick




  • Plastic Waste

  • Sand


Water Absorption




Comp. Strength









Low Toughness

High Toughness








400-500 /Hr


Cost of Manufacturing


1.5-2rs /Brick

No Break of Plastic Brick Comparison between Clay Brick & Plastic Brick


  • Plastic bricks can a very good alternative of traditional earthen bricks.

  • Plastic bricks can be used for partition walls and exterior walls

  • Cost of manufacturing per unit plastic brick is significantly lower than traditional earthen bricks, hence they are cheaper

  • Re using plastic will reduce environmental pollution.

  • Plastic sand bricks reduce the usage of clay in making of bricks

  • Water absorption of plastic sand brick is 1-2 percent. Hence Dampness of wall problem prevented

  • Consume less time compare to traditional brick

  • Plastic brick available many different colors adding color pigment


[1] Dinesh S; Dinesh A; and Kirubhakaran k., Utilisation of Waste Plastic in Manufacturing of Bricks and Paver Blocks International Journal of Applied Engineering Research, Vol.2 (4), pp. 364-368.

[2] . Nitin Goyal ; Manisha., Constructing structures using eco- bricks, International Journal of Recent Trends in Engineering & Research . Vol.2 (4), pp. 159-164

[3] Puttaraj M.H; Shanmukha S; Navaneeth Rai P.G; and Prathima T.B, Utilization of Wate Plastic in Manufacturing of Plastic- soil Bricks International Journal of Technology Enhancement and Emerging Engineering Reshearch Vol. 2(4), pp. 102-107.