Analisa Perkuatan Tanah dengan Menggunakan Semen sebagai Bahan Tambahan dalam Meningkatkan Nilai Cbr pada Tanah Lempung ( Penelitian )

Abstract

Soil is the base of a structure or construction, either building or road. It oftenbrings about problems if it has bad quality. Bad soil qualities, such as highplasticity, low shove force, solidity, big change of volume, and big shrinkingpotentiality, will be harmful if they are used as the base of a building orconstruction. There are many ways to improve power the soil, among others byadding chemical substance (chemical way of stabilization) with ussualy Portland Cement. The intention to analyze the effect of adding cement on clay. Then the purpose of the writing of this research is to get a comparison between the basic soil plasticity and CBR value with the original soil has been stabilized using cement. Based on the results of laboratory testwith high plasticity,with plasticity index (PI), 30.28%, classification CH According to USCS and categorized into group A-7-5 AASHTO.Clay mixed with Cement has led to reduced Based on the AASHTO. From a study in laboratory with soil that has been mixed cement 30%, the most dominant influence due to stabilization with cement, namely a decrease plasticity index (PI), 30.28% into 5.24%, with decreasepercentace as 24.04%.CBR value also increased significantly, namely from 5.17% into 61.25% with increasepercentace as 56.08%.