Open AccessEffect of using clamshell ash as stabilization material for clay
Author(s) -
Ika Puji Hastuty,
Aulia Rahman
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1122/1/012018
Subject(s) - california bearing ratio , atterberg limits , compressive strength , pozzolan , soil stabilization , water content , materials science , proctor compaction test , geotechnical engineering , cement , composite material , environmental science , compaction , soil water , soil science , geology , portland cement
Clamshells are the waste of clams which are usually consumed by people. Clamshells contain 66.70% of CaO, the chemical compounds that have pozzolanic properties, which can be used as a substitute for cement. The purpose of this study was to determine the effect of the addition of clamshell ash to the index value of soil properties, soil classification, soil plastic properties, free compressive strength value, and CBR value. The test was carried out with Unconfined Compression Test (UCT) and California Bearing Ratio (CBR). The result showed that according to AASHTO this soil was classified as A-7-6 (9) and according to USCS it was classified as CL (Clay - Low Plasticity). The original soil sample had a moisture content of 34.43%; specific weight of 2.65%; liquid limit of 47.33%; plastic limit of 17.45%; and plasticity index of 29.88%. The values of unsoaked design CBR and UCT for the original soil were 6.29% and 1,42 kg/cm 2 . Meanwhile, among all the variations, the mixture of 12% clamshell ash reached the optimum value of soaked design California Bearing Ratio and free compressive strength in Unconfined Compression Test which were 8.13% and 2.39 kg/cm 2 .