The Effect Of Clam Shell Powder And Fly Ash as Clay Stabilizier on California Bearing Ratio (CBR) And Unconfined Compression Test (UCT)

Abstract

Stabilization is an attempt to improve soil conditions that have poor properties index. One of the stabilization of soils is usually done by adding chemicals to the soil. Common chemicals used are cement, lime, bitumen. In this study clay soil stabilization was carried out by the addition of clam shell powder and fly ash.

The purpose of this study was to determine the value of the index properties, the Atterberg value, the standard Compaction value, the value of the California Bearing Ratio (CBR) and compressive strength test values of Unconfined Compression Test (UCT) on clay.

From the study, it was obtained that the original soil sample had a moisture content of 34.43%, a specific weight of 2.65, a liquid limit of 47.33% and a plasticity index of 29.88%. The original soil classification according to USCS is classified as Clay - Low Plasticity (CL) and according to AASHTO it is classified as A-7-6 (9). The unconfined Compression Test (UCT) of the original soil added was 1.42 kg / cm2. Soaked laboratory CBR values for native soils are 6.29%.

The most effective results were obtained from a mixture of 8% of shell powder and 5% fly ash with a UCT value of 2.50% kg / cm2. For the CBR testing of laboratory mixtures the most effective variation on the mixture of 8% of shell powder and 5% fly ash with a laboratory CBR value soaked by 9.57%. The soil that has been mixed with the most effective stabilizer material, 8% of clam shell powder and 5% fly ash, belongs to the type of Clay - Low Plasticity (CL) based on USCS classification and classified as A-6 (6) based on AASHTO classification.