An Experimental Study on the Effect of RBI Grade 81 Additive on the Engineering Properties of Clayey Soils

This article focuses on the study of influence of RBI grade 81 stabilizer on the improvement of the expansive soil properties with an emphasis on the micro-level analysis of the treated soils. The soil samples were treated with various dosages (2, 4 and 6%) of the stabilizer and cured under controlled conditions. The improvement in the treated soil properties in terms of effectiveness of dosage and effectiveness of curing periods was studied. An attempt has been made to understand the soil behavior and the efficiency of the stabilizer by comparing the laboratory test results with the micro-level analysis. The test results indicated reduction in free swell index of the soil samples and a significant increase in the strength parameters of the treated soils. The addition of RBI 81 stabilizer resulted in the improvement of about 500% and 300% in the UCS values for samples 1 and 2, respectively. The CBR values obtained from treated soil samples were observed to be around 50% for both the soils in soaked condition. The swell potential of the treated soil samples was reduced by 80% for both the soil samples.