EFFECTS OF ORDINARY PORTLAND CEMENT ON THE SOIL-WATER CHARACTERISTICS CURVE OF LATERITIC SOIL

IF 0.2 Q4 MULTIDISCIPLINARY SCIENCES
Mohammad Jawed Roshan, Ahmad Safuan A. Rashid, Norshakila Abdul Wahab, Muhammad Azril Hezmi, Siti Norafida Jusoh, Nik Daud Nik Norsyahariati, Sakina Tamasoki, Nor Zurairahetty Mohd Yunus, Roslizayati Razali
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引用次数: 1

Abstract

The lateritic soil, abundant in tropical and sub-tropical countries, is a common construction material used for various purposes, such as constructing transportation infrastructures, landfills, and other earthworks. The residual lateritic soil is usually located in the vadose zone (unsaturated zone) situated above the water table. Therefore, this paper investigates untreated and cement-treated lateritic soil behaviour in terms of Soil Water Characteristics Curve (SWCC), a key topic in unsaturated soil mechanics. The soil sampling was performed from Universiti Teknologi Malaysia campus, Johor Bahru, and then the collected soil was tested in the laboratory. The 3%, 6%, 9%, and 12% ordinary Portland cement (OPC) according to the dry soil weight were utilized, and then the necessary basic tests, compaction tests, and pressure plate tests were performed. The obtained data points from pressure plate extractor equipment were fitted using Fredlund and Xing and van Genuchten models. The results exposed that the used soil is plastic silt (MH) and A7-5 according to the Unified soil classification System (USCS) and AASHTO, respectively. The Maximum Dry Density (MDD) increased from 1.39 g/cm3 for untreated to 1.419 g/cm3, 1.447g/cm3, 1.46g/cm3, and 1.479g/cm3 for 3%, 6%, 9%, and 12% cement, respectively. Similarly, the Optimum Water Content (OMC) increased from 28% to 29.5, 30, 30.5, and 31% by adding 3, 6, 9, and 12% cement, respectively. Regarding the obtained SWCC results, the Air Entry Value (AEV) increased with the increasing cement content. Overall, the results revealed that the water holding capacity of lateritic soil increases with increasing cement content.
普通硅酸盐水泥对红土土土-水特性曲线的影响
红土在热带和亚热带国家丰富,是一种常用的建筑材料,用于各种目的,如建设交通基础设施,垃圾填埋场和其他土方工程。残余红土通常位于地下水位以上的渗流带(非饱和带)。因此,本文根据土壤水特征曲线(SWCC)研究了未经处理和水泥处理的红土土的行为,这是非饱和土力学的一个关键主题。土壤取样于马来西亚理工大学新山校区进行,然后在实验室对采集的土壤进行测试。采用干土重量为3%、6%、9%、12%的普通波特兰水泥(OPC),进行必要的基础试验、压实试验和压板试验。用Fredlund、Xing和van Genuchten模型拟合从压力板提取设备获得的数据点。结果表明,按照统一土壤分类系统(USCS)和AASHTO,利用土壤分别为塑性粉土(MH)和A7-5。最大干密度(MDD)从未处理的1.39 g/cm3分别增加到3%、6%、9%和12%水泥的1.419 g/cm3、1.447g/cm3、1.46g/cm3和1.479g/cm3。同样,当水泥掺入量分别为3、6、9和12%时,最佳含水率(OMC)分别从28%提高到29.5%、30%、30.5和31%。所得SWCC结果表明,进风值(AEV)随水泥掺量的增加而增大。总体而言,红土的持水能力随水泥掺量的增加而增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Suranaree Journal of Science and Technology
Suranaree Journal of Science and Technology MULTIDISCIPLINARY SCIENCES-
CiteScore
0.30
自引率
50.00%
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