Strength and morphological characteristics of organic soil stabilized with magnesium chloride

被引：22

作者：

Hassan, Wan Hasmida Wan ^{[1
]}

Rashid, Ahmad Safuan A. ^{[1
,2
]}

Latifi, Nima ^{[3
]}

Horpibulsuk, Suksun ^{[4
,5
]}

Borhamdin, Suhaila ^{[6
]}

机构：

[1] Univ Teknol Malaysia, Dept Geotech & Transportat, Fac Civil Engn, Skudai 81310, Johor, Malaysia

[2] Univ Teknol Malaysia, Dept Geotech & Transportat, Ctr Trop Geoengn GEOTROPIK, Fac Civil Engn, Skudai 81310, Johor, Malaysia

[3] Mississippi State Univ, Dept Civil & Environm Engn, Mississippi State, MS 39762 USA

[4] Suranaree Univ Technol, Sch Civil Engn, Nakhon Ratchasima 30000, Thailand

[5] Suranaree Univ Technol, Ctr Excellence Innovat Sustainable Infrastruct De, Nakhon Ratchasima 30000, Thailand

[6] Univ Teknol Malaysia, Dept Chem, Fac Sci, Skudai 81310, Johor, Malaysia

来源：

QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY | 2017年 / 50卷 / 04期

关键词：

MICROSTRUCTURAL CHARACTERISTICS; BEHAVIOR; CEMENT;

D O I：

10.1144/qjegh2016-124

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Organic soil causes major problems in infrastructure development. It has high compressibility and low shear strength, and requires chemical stabilization if it is to be a sustainable geomaterial. This research investigated the strength and microstructural properties of organic soil stabilized with magnesium chloride (MgCl2). Unconfined compressive strength tests were undertaken to assess shear strength properties, and microstructural changes were monitored via field-emission scanning electron microscopy (FESEM) and energy-dispersive X-ray spectrometry (EDAX). The results confirm that MgCl2 improves the compressive strength of organic soil. The strength of MgCl2-stabilized organic soil is increased to around 3 - 5 times that of untreated soil during the first 7 days of curing. FESEM results show that the porosity of organic soil is filled by a new cementitious compound, identified as magnesium silicate hydrate (M-S-H).

引用

页码：454 / 459

页数：6

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