Experimental Study on Strength and Dry-Wet Cycle Characteristics of Coastally Soft Soil in South China Cemented by Sand and Cement

SONG Shuxiang; ZHENG Chao; YANG Kun; FENG Deluan

doi:10.13204/j.gyjzG22072006

Volume 53 Issue 12

Dec. 2023

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2023 > 53(12): 190-197

Gu Wei, Xiong Xueyu. THEORECTICAL INVESTIGATION OF EXTERNALLY PRESTRESSED STRUCTURES IN ELASTIC PHASE[J]. INDUSTRIAL CONSTRUCTION, 2004, 34(7): 7-11,15. doi: 10.13204/j.gyjz200407002

Citation:

SONG Shuxiang, ZHENG Chao, YANG Kun, FENG Deluan. Experimental Study on Strength and Dry-Wet Cycle Characteristics of Coastally Soft Soil in South China Cemented by Sand and Cement[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(12): 190-197. doi: 10.13204/j.gyjzG22072006

Gu Wei, Xiong Xueyu. THEORECTICAL INVESTIGATION OF EXTERNALLY PRESTRESSED STRUCTURES IN ELASTIC PHASE[J]. INDUSTRIAL CONSTRUCTION, 2004, 34(7): 7-11,15. doi: 10.13204/j.gyjz200407002

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Experimental Study on Strength and Dry-Wet Cycle Characteristics of Coastally Soft Soil in South China Cemented by Sand and Cement

doi: 10.13204/j.gyjzG22072006

1. Guangzhou Environmental Protection Investment Group Co., Ltd., Guangzhou 510010, China;
2. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China

Received Date: 2022-07-20
Available Online: 2024-02-28

Abstract

Abstract

To study the influence of sand on the strength and dry-wet cycle characteristics of cementedly coastal soft clay in South China, a series of cementedly coastal soft clay samples in South China with different contents and sizes of sand were prepared, and unconfined compression strength tests, dry-wet cycle tests, scanning electron microscopy tests and X-Ray diffraction tests were conducted in seawater and fresh water. The test results indicated that the unconfined compression strength of sand-mixed clay-cemented samples cured for 7, 14, and 28 days increased with the increase of the sand content, and the strength cured for 28 days increased with the decrease of the size of sand particles; the maximum loss ratio of mass for sand-mixed clay-cemented samples was up to 61%. The properties of strength deterioration subjected to dry-wet cycles improved with the increase of the sand content and the decrease of the size of sand particles. Moreover, the resistant capability for dry-wet cycling of samples in the fresh water was obviously better than that in the seawater. The results by SEM and XRD tests showed that the reinforced mechanisms of sand-mixed cemented soft clay in South China mainly reflected the following:1)the modulus replacement effect (replacement of low modulus soft clay with the high modulus sand);2)the interfacial effect between sand and clay-cemented matrixes;and 3) the blocking and isolating effect for crack.
- coastally soft soil,
- dry-wet cycle,
- unconfined compression strength,
- sand content,
- sand-cement stabilization

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References

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