Penambahan Serbuk Cangkang Kerang Terhadap Perubahan Nilai CBR Laboratorium Lempung Lunak
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Abstract
Coastal area development is one of the efforts to improve the socio-economic conditions of the community. To realize this development, adequate supporting infrastructure is needed. However, in the implementation of infrastructure development, problems are often encountered, such as the type of soil in coastal areas being predominantly soft clay. Soft clay is a type of soil that often causes construction failures due to its low bearing capacity and shear strength. To improve these characteristics, chemical stabilization can be carried out by adding other materials. In this study, chemical stabilization was performed on soft clay soil using shell powder, which contains lime and thus acts as a pozzolan. The shell powder added to the soft clay varied from 5%, 10%, 15%, to 20%. Changes in the characteristics of the soft clay due to chemical stabilization were observed from the changes in consistency limits and California Bearing Ratio (CBR) values. Based on the test results, changes in the characteristics of the soft clay were obtained. With the addition of shell powder, the liquid limit value decreased with the largest difference being 12.40%. This is in contrast to the plastic limit and shrinkage limit values, which increased with the addition of shell powder. The change in laboratory CBR values showed an increase up to the addition of 10% shell powder and then gradually decreased with the addition of 15% and 20% shell powder.
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