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Open AccessArticle

Effects of Initial Water Content on Microstructure and Mechanical Properties of Lean Clay Soil Stabilized by Compound Calcium-Based Stabilizer

College of Civil Engineering and Architecture, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
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Materials 2018, 11(10), 1933; https://doi.org/10.3390/ma11101933
Received: 15 September 2018 / Revised: 1 October 2018 / Accepted: 8 October 2018 / Published: 10 October 2018
(This article belongs to the Section Advanced Composites)
Initial water content significantly affects the efficiency of soil stabilization. In this study, the effects of initial water content on the compressibility, strength, microstructure, and composition of a lean clay soil stabilized by compound calcium-based stabilizer were investigated by static compaction test, unconfined compression test, optical microscope observations, environment scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction. The results indicate that as the initial water content increases in the range studied, both the compaction energy and the maximum compaction force decrease linearly and there are less soil aggregates or agglomerations, and a smaller proportion of large pores in the compacted mixture structure. In addition, for specimens cured with or without external water supply and under different compaction degrees, the variation law of the unconfined compressive strength with initial water content is different and the highest strength value is obtained at various initial water contents. With the increase of initial water content, the percentage of the oxygen element tends to increase in the reaction products of the calcium-based stabilizer, whereas the primary mineral composition of the soil-stabilizer mixture did not change notably. View Full-Text
Keywords: initial water content; clay soil; calcium-based stabilizer; soil stabilization; compressibility; strength; microstructure and composition initial water content; clay soil; calcium-based stabilizer; soil stabilization; compressibility; strength; microstructure and composition
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MDPI and ACS Style

Yin, C.; Zhang, W.; Jiang, X.; Huang, Z. Effects of Initial Water Content on Microstructure and Mechanical Properties of Lean Clay Soil Stabilized by Compound Calcium-Based Stabilizer. Materials 2018, 11, 1933.

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