An Experimental Study on CBR of Soil Reinforced With Plastic Waste

  • Asfaque Habib
  • Mohsin Jamal
  • Nehal Ahmed
  • Abhijit Mondal


The usage of plastic is more popular compared to biodegradable objects which are costlier. But humans often forget about the undesirable effects of plastic use which consecutively leads to pollution which must be completely removed or at least reduced. Plastic is considered one of the most harmful pollutants of the environment as it would not decay and it has become one of the major problems for the world. The harmful gas which is being produced by this agent leads to tremendous health related problems. So, executing these wastes in soil stabilisation helps to reduce the risk of natural destruction which is caused due to precipitation or other aspect and also it help in decreasing the waste in an adequate amount. This implies that stabilisation using waste plastic strips is an economic method where the use of unusable materials as plastic and other cheaply materials of plastic can be used which is easily obtainable. The soil is the key element of nature and all the basic needs of life are fulfilled by the soil. Soil stabilisation is the process by which it improves the physical properties of soil, such as shear strength, bearing capacity which can be done by the use of controlled compaction or addition of appropriate admixtures like bitumen, cement, lime, sand, fly ash or by using geotextiles, geosynthetics etc.

This paper reflects that the plastic strips which are taken from used plastic bottles, are mixed with the soil, and with this, a series of California Bearing Ratio (CBR) tests were conducted. The soil sample is prepared by adding plastic strips with varying percentages (0.5%, 1%, 2% and 3%) and with lengths (1 cm and 3 cm, the thickness is 0.5 cm for both, so the aspect ratios are 2 and 6 respectively). And the results and conclusions are summed up which shows that the use of plastic in the soil in an appropriate amount really aids in improving its CBR value