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Materials (Basel). 2019 Mar 11;12(5). pii: E826. doi: 10.3390/ma12050826.

Study on the Stabilization of a New Type of Waste Solidifying Agent for Soft Soil.

Author information

1
School of Civil Engineering and Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China. sjs@nit.zju.edu.cn.
2
School of Civil Engineering and Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China. xyd@nit.zju.edu.cn.
3
School of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang 212000, China. cj199443@163.com.
4
School of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang 212000, China. wy903961287@163.com.

Abstract

The use of desulfurization gypsum and steel/furnace slag composite cementitious material (DGSC) to solidify soft soil can fully utilize industrial wastes, reduce cement use and protect natural resources. By studying the unconfined compressive strengths of DGSC-solidified soil with different mix ratios, water-binder ratios and curing periods, the influence of those factors on the unconfined compressive strength of the soil can be analyzed. Furthermore, the quasi-water-cement ratio is introduced to predict the strength of the DGSC-solidified soil. The results show that the higher the DGSC content is, the better its effect on the soft soil. The variation in the unconfined compressive strength of DGSC-solidified soil overtime can be described by the same trend as that of cement-solidified soil but its early strength is lower than that of cement-solidified soil. When the water-binder ratio of the DGSC-solidified soil is the same as that of the cement-solidified soil, after a28-day curing period, the content of DGSC is higher than that of the 5% cement content, so the DGSC solidification effect is comparable to that of cement. Therefore, using DGSC instead of cement as a soft soil solidifying agent can meet the strength requirements of solidified soil.

KEYWORDS:

DGSC-solidified soil; quasi-water-cement ratio; soil stabilization; unconfined compressive strength

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