Analysis of Strength Development and Soil-Water Characteristics of Rice Husk Ash-Lime Stabilized Soft Soil

被引：45

作者：

Jiang, Xunli ^{[1
]}

Huang, Zhiyi ^{[1
]}

Ma, Fuquan ^{[1
]}

Luo, Xue ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Civil Engn & Architecture, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China

来源：

MATERIALS | 2019年 / 12卷 / 23期

关键词：

rice husk ash (RHA); unsaturated stabilized soil; soil-water characteristic curve (SWCC); effective shear strength; scanning electron microscope (SEM); REACTION-PRODUCT; WASTE; SURFACE; SILICA;

D O I：

10.3390/ma12233873

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

With increased awareness of environmental protection, the output of traditional curing agents such as cement and lime is less and less, so it is urgent to develop new curing agents with high efficiency and environmental benefits. Thus, this study aims at investigating the application of rice husk ash (RHA) from agricultural waste to the soft soil stabilization. A series of tests are conducted to analyze the strength development process and soil-water characteristics of rice husk ash-lime (RHA-lime) stabilized soils. The results of the strength tests showed that by increasing the content of RHA, the unconfined compressive strength (UCS) and splitting strength of stabilized soils increased first and then decreased. The effective shear strength indexes of the three soil types (soft soil, lime-stabilized soil, and RHA-lime soil) are measured and compared. It is found that RHA can effectively improve the shear resistance and water resistance of stabilized soil. The results of methylene blue test demonstrated that RHA can also promote the reduction of the specific surface area and swelling potential energy of lime-stabilized soil. In addition, the influence of RHA on mineral composition and morphology change in stabilized soils is studied at the microscopic level. The X-ray diffraction tests and scanning electron microscope (SEM) tests showed that strength development and change of soil-water properties of RHA-lime stabilized soil are attributed to enhanced cohesion by cementation and pores filling with agglomerated mineral.

引用

页数：19

共 39 条

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