A Comparative Study of Stabilization on Sub-Grade Soil by Using Rice Husk Ash in Different Combinations

  Sunil Kumar Thakur,  Abhijeet Shukla

The objective of this work is to utilize the effectiveness of Rice Husk Ash (RHA) material to enhance the properties of natural soil used for subgrade soil .The standard of a pavement depends on the strength of its soil sub-grade. The soil sub-grade should be uniform in terms of properties like index, compaction and strength properties etc. Materials selection for the construction of soil sub-grade should be of adequate strength and at a similar time it should be economical to be used. If the natural soil is soft and weak it desires some improvement to be used as soil sub-grade. It is therefore required to stabilize the weak soil to increase its strength and reduced softness. The laboratory work concerned index properties to classify the soil sample. The preliminary investigation of the soil shows that it belongs to SC class of soil in the USCS soil classification system. Whereas as per IS classification this class are generally of clay with low compressibility (CL). Atterberg limits, compaction, and CBR tests were used to evaluate properties of stabilized soil. The soil was stabilized with Rice Husk Ash (RHA) in stepped concentration of 5%, 10%, 15%, 20%, 25% and 30% by dry weight of the soil individually. All stabilized soil samples were cured for 96 hours for CBR test in fully saturated condition. The test results indicate that the addition of RHA enhances the percentage of grain size distribution, but with addition of RHA till 10% the LL, PL and PI decreases, while these parameters further increases in this limit beyond i.e. 10% to 30% of RHA. Specific Gravity and Maximum Dry Density (MDD) decrease with addition of RHA for all percentage values, whereas OMC increases in each material. The CBR value increases with the addition of RHA till 10%, while it decreases beyond the limit 10% to 30% with addition of RHA.

Keywords- Subgrade, Rice Husk Ash (RHA), LL, PL, PI, MDD, OMC, CBR

Unique Identification Number - IJEDR1704018
Page Number(s) - 107-112
Pubished in - Volume 5 | Issue 4 | October 2017
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Sunil Kumar Thakur,  Abhijeet Shukla,   "A Comparative Study of Stabilization on Sub-Grade Soil by Using Rice Husk Ash in Different Combinations", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.5, Issue 4, pp.107-112, October 2017, Available at :http://www.ijedr.org/papers/IJEDR1704018.pdf