In today’s world, there are numerous sources of waste generation. A large number of industries e.g., textile, automobiles, electronic, cement and construction, etc. These industries generate different types of waste products which are harmful to the environment, if not recycled/reused. The used vehicle tyre is one such example of end product material. The utilization of these tyres, as waste tyre chips may be used for road subgrade strength enhancement (in terms of CBR Value), as suggested by the researchers in the literature. A vast literature is available to enhance the engineering properties of soils such as permeability, bearing capacity, unconfined compressive strength, etc. by adding various additives like cement, lime, fly ash, foundry sand, geotextiles, tyre chips etc. However, the studies on mixing of tyre chips for strength enhancement of such type of soil is scantly available. Therefore, in this study, an experimental investigation has been done by mixing two additives in original soil in different proportions i.e., cement (0%, 2.5%, 5% by weight) and tyre chips (0%, 3%, 6%, 9% by weight). The standard experiments were performed for different combinations of soil cement and tyre chips. The analysis shows that the CBR value of original soil is 2.411% the percentage increases in CBR value of original soil is 65%, when added with 2.5% cement and while it is 110% with 5%cement. The percentage increase in CBR value with increase in cement content from 2.5 to 5% is ~ 28%. This shows that increase in CBR value increases at a slower rate as the cement content increases. The mixing of tyre chips in different proportions, with soil added with cement, shows an increasing trend of CBR value and gives optimum value when added with 6% tyre chips. Further increase in tyre chips content i.e., 9% shows a reduction in CBR value. The study shows that the rate of increase of CBR value increases at a slower rate for original soil mixed with 6% tyre chips, when cement content increases from 2.5 to 5%. Study also reveals that if higher value of CBR is not required for the specified work the combination of original soil + 2.5cement and 6% tyre chips will be more economical compared to combination with 5% cement.

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Strength Enhancement of Clay Soil Added with Cement and Tyre Chips

  • Kishan Kumar Yati,
  • U. K. Maheshwari

摘要

In today’s world, there are numerous sources of waste generation. A large number of industries e.g., textile, automobiles, electronic, cement and construction, etc. These industries generate different types of waste products which are harmful to the environment, if not recycled/reused. The used vehicle tyre is one such example of end product material. The utilization of these tyres, as waste tyre chips may be used for road subgrade strength enhancement (in terms of CBR Value), as suggested by the researchers in the literature. A vast literature is available to enhance the engineering properties of soils such as permeability, bearing capacity, unconfined compressive strength, etc. by adding various additives like cement, lime, fly ash, foundry sand, geotextiles, tyre chips etc. However, the studies on mixing of tyre chips for strength enhancement of such type of soil is scantly available. Therefore, in this study, an experimental investigation has been done by mixing two additives in original soil in different proportions i.e., cement (0%, 2.5%, 5% by weight) and tyre chips (0%, 3%, 6%, 9% by weight). The standard experiments were performed for different combinations of soil cement and tyre chips. The analysis shows that the CBR value of original soil is 2.411% the percentage increases in CBR value of original soil is 65%, when added with 2.5% cement and while it is 110% with 5%cement. The percentage increase in CBR value with increase in cement content from 2.5 to 5% is ~ 28%. This shows that increase in CBR value increases at a slower rate as the cement content increases. The mixing of tyre chips in different proportions, with soil added with cement, shows an increasing trend of CBR value and gives optimum value when added with 6% tyre chips. Further increase in tyre chips content i.e., 9% shows a reduction in CBR value. The study shows that the rate of increase of CBR value increases at a slower rate for original soil mixed with 6% tyre chips, when cement content increases from 2.5 to 5%. Study also reveals that if higher value of CBR is not required for the specified work the combination of original soil + 2.5cement and 6% tyre chips will be more economical compared to combination with 5% cement.