• Bulletin of the Chinese Ceramic Society
  • Vol. 44, Issue 5, 1927 (2025)
QIU Mingming, YANG Meng, LI Xiaomin, and LI Shengbin
Author Affiliations
  • School of Architectural Engineering, Yan'an University, Yan'an 716000, China
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    DOI: 10.16552/j.cnki.issn1001-1625.2024.1146 Cite this Article
    QIU Mingming, YANG Meng, LI Xiaomin, LI Shengbin. Compressive Strength Characteristics and Its Influencing Factors of High Fill Loess Solidified by Cement[J]. Bulletin of the Chinese Ceramic Society, 2025, 44(5): 1927 Copy Citation Text show less

    Abstract

    Evaluating the reinforcement effect of loess foundation involves determining the compressive strength characteristics of cement-solidified loess, which serves as the basis for analysis. Using high fill loess in Yan'an New Area as the subject, the unconfined compressive strength tests and direct shear tests were conducted under various conditions to analyze the effects of cement content, curing age, compaction degree, moisture level, and immersion environment on unconfined compressive strength. The correlation between compressive strength, and shear strength, deformation modulus of cement-solidified loess was investigated. The findings indicate the occurrence of oblique cracks at 30°~40° angles in cement-solidified loess following compression failure, demonstrating brittle failure characteristics. The stress-strain curve of cement-solidified loess exhibits a strain-softening behavior, encompassing elastic stage, plastic yield stage, stress decay stage, and residual stability stage. The unconfined compressive strength of cement-solidified loess demonstrates a linear increase with higher cement content, longer curing age, and greater compaction degree. However, the rate of increase gradually diminishes as these factors escalate. Additionally, the unconfined compressive strength decreases exponentially with initial water content. The unconfined compressive strength of cement-solidified loess decreases under water immersion condition, and the unconfined compressive strength of the samples after water immersion is more than 26% lower than that before water immersion. Furthermore, there is a linear correlation between the unconfined compressive strength of cement-solidified loess and shear strength as well as deformation modulus. The cohesion represents approximately 20%~30% of unconfined compressive strength, and the deformation modulus is 23~250 times of unconfined compressive strength.
    QIU Mingming, YANG Meng, LI Xiaomin, LI Shengbin. Compressive Strength Characteristics and Its Influencing Factors of High Fill Loess Solidified by Cement[J]. Bulletin of the Chinese Ceramic Society, 2025, 44(5): 1927
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