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Advances in Civil Engineering
Volume 2018, Article ID 1945808, 9 pages
https://doi.org/10.1155/2018/1945808
Research Article

Investigation of the Application of Various Water Additive Ratios on Unconfined Compressive Strength of Cement-Stabilized Amorphous Peat at Different Natural Moisture Contents

1Master Student, Department of Civil Engineering, Universiti Malaysia Sarawak, Samarahan, Malaysia
2Associate Professor, Department of Civil Engineering, Universiti Malaysia Sarawak, Samarahan, Malaysia
3Lecturer, Department of Civil Engineering, Universiti Malaysia Sarawak, Samarahan, Malaysia

Correspondence should be addressed to Siti Noor Linda Taib; ym.saminu@adnilt

Received 13 March 2018; Revised 26 July 2018; Accepted 9 August 2018; Published 12 September 2018

Academic Editor: Constantin Chalioris

Copyright © 2018 Atikah Rahmi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Natural peat is considered incapable of supporting built structure due to its poor engineering properties. Chemical stabilization is one of the peat soil improvement methods which has been studied by many researchers. This study describes an investigation of water additive (W/A) ratio application on cement-stabilized peat strength. Peat soil at different moisture contents, which are 1210%, 803%, and 380%, were stabilized with cement by W/A ratio of 2.0, 2.5, 3.0, 3.5, and 4.0. Unconfined compressive strength (UCS) test was conducted after the specimens were being air-cured for 28 and 56 days. The result shows that there is an increase of UCS value as the decrease of W/A ratio (the increase of cement dosage) and the increase of curing time and peat moisture content. The higher strength found in the specimen with higher moisture content, compared to the lower one at the same W/A ratio, shows that the mix design of cement-stabilized peat using W/A ratio should have differed under different peat natural moisture contents. From the result, it is also found that cement hydrolysis reaction occurred despite the presence of humic acid in the peat soil, which by many studies is assumed will hinder the cement-soil reaction.