Stabilization of lateritic soil by ladle furnace slag for pavement subbase material

IF 2.5 3区 工程技术 Q2 ENGINEERING, CIVIL Geomechanics and Engineering Pub Date : 2021-01-01 DOI:10.12989/GAE.2021.26.4.323
S. Chaiyaput, J. Ayawanna
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引用次数: 2

Abstract

The effect of ladle furnace slag or LFS on the mechanical properties of the lateritic soil mixes for use as a subbase course material in the pavement structure was investigated. The lateritic soil grade E with the lowest mechanical properties was studied by mixing the LFS in the ratios of 5 to 12 wt%. The pavement material criterion of the Thailand Department of Highways was used to qualify the liquid limit, plasticity index, the California bearing ratio, and the swelling index of the mixed lateritic soil with the LFS. An increase in the California bearing ratio of the lateritic soil under the soaked condition was found to be positively correlated with the increasing LFS. Meanwhile, the liquid limit and the plasticity index decreased, leading to a decrease in the swelling index of the lateritic soil containing LFS. Using LFS reduced the total fine-particle ratio in the soil mixture but effectively enhanced the degree of compaction and swelling tolerance in the lateritic soil mixture. 10 wt% LFS is strongly recommended as a minimum admixture in the lateritic soil due to the highly improved plasticity and the mechanical properties of the lateritic soil for a subbase course material selection under the standard specifications.
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路面底料钢包炉渣稳定红土的研究
研究了钢包炉渣和LFS对红土混合料作为路面底层材料力学性能的影响。对力学性能最低的E级红土进行了研究,混合了5 ~ 12 wt%的LFS。采用泰国公路局路面材料标准对混合红土与LFS的液限、塑性指数、加州承载比、膨胀指数进行了定性。浸水条件下红土加州承载比的增大与LFS的增大呈正相关。同时,液限和塑性指数降低,导致含LFS红土的膨胀指数降低。LFS降低了混合土中总细粒比,但有效提高了红土混合土的压实度和耐膨胀性。10 wt% LFS被强烈推荐作为红土中的最小掺量,因为在标准规范下,红土的可塑性和机械性能得到了极大的改善,可以用于基层材料的选择。
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来源期刊
Geomechanics and Engineering
Geomechanics and Engineering ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL
CiteScore
5.20
自引率
25.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: The Geomechanics and Engineering aims at opening an easy access to the valuable source of information and providing an excellent publication channel for the global community of researchers in the geomechanics and its applications. Typical subjects covered by the journal include: - Analytical, computational, and experimental multiscale and interaction mechanics- Computational and Theoretical Geomechnics- Foundations- Tunneling- Earth Structures- Site Characterization- Soil-Structure Interactions
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