Preprint Article Version 1 This version is not peer-reviewed

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

Version 1 : Received: 15 September 2018 / Approved: 18 September 2018 / Online: 18 September 2018 (10:39:53 CEST)

A peer-reviewed article of this Preprint also exists.

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. 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.

Journal reference: Materials 2018, 11, 1933
DOI: 10.3390/ma11101933

Abstract

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 spectroscopy. 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 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 oxygen element tends to increase in the reaction products of the calcium-based stabilizer, whereas the crystalline mineral of the soil did not change obviously.

Subject Areas

initial water content; lean clay soil; compound calcium-based stabilizer; compressibility; strength; microstructure and composition

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