The settlement analysis of treated marine clay

Abstract

This research was conducted to understand the settlement analysis of treated marine clay. Marine clay is well known as problematic soil because of the high compressibility and low in shear strength. Therefore, there were many structure failures due to this problematic soil. The marine clay is normally found at coastal area. This research was done in order to understand and discuss properties of the soil and settlement occurred for treated and untreated marine clay. The additives that used were lime, cement, and Palm Oil Fuel Ash (POFA) with percentages of 5 %, 10 %, and 15 %. In order to determine the parameter of marine clay, Atterberg’s limit and sieve test had been conducted. Based on the result, marine clay had been classified as group A-7-6 according to American Association of State Highway and Transportation Officials (AASHTO) shows that the marine clay is a weak soil. Besides that, the settlement analysis of treated and untreated marine clay had done by one-dimensional consolidation test. The results show that lime as a stabilizer of the soil is the most effective additives in order to improve the marine clay strength. Based on calcuation of t90, the time taken for the lime to stabilized the soil took only 1 year compared to untreated marine clay which is 17 years. As conclusion, the settlement of treated marine clay is faster than untreated marine clay. Therefore, the treated marine clay can be used in the construction to prevent from landslide and structure failure due to soft soil behaviour.