Pengaruh Penambahan Abu Sekam Padi dan Matos sebagai Bahan Stabilisasi Tanah Lempung terhadap Nilai CBR dan Swelling

Abstract

Soil is a very important part in any construction work, because it functions to receive and withstand the load from the structure above it, so the soil must have a good bearing capacity. However, clay soils have relatively high swelling and shrinkage values and low bearing capacity. This study aims to determine the effect of adding rice husk ash and matos to the CBR and swelling values of soil originating from Pereng Village, Prambanan, Klaten, Central Java. This research consisted of testing soil properties, granular analysis, consistency limits, and soil compaction, CBR unsoaked and CBR soaked, and swelling. The results showed that based on the AASHTO classification the soil used was included in group A-7-5 which had loamy soil with moderate to poor properties. The results of the CBR test for unsoaked native soil were 7.580% and CBR for soaked native soil was 2.790%, and swelling of native soil was 9.591%. After the addition of 1% matos, the unsoaked CBR value increased to 9.998% at 7 days of curing, while the soaked CBR decreased to 1.163%. The addition of 1% matos and 15% rice husk ash resulted in unsoaked CBR values of 16.275%, soaked CBR values of 4.883%, and swelling of 3.871%, so that the mixture was the mixture with the most optimum percentage.