文献类型：期刊文献

英文题名：Short-term mechanical properties and microstructure of coastal cement soil modified by sugarcane bagasse ash

作者：Yao, Liming[1,2];Yang, Jiawei[1];Ma, Xukun[1];Wei, Pengfei[1];Wang, Yunfeng[2];Wang, Wei[1,3];Li, Na[1]

机构：[1]Shaoxing Univ, Shaoxing Key Lab Interact Soft Soil Fdn & Bldg Str, Sch Civil Engn, Shaoxing 312000, Peoples R China;[2]Zhejiang Univ Co Ltd, Architectural Design & Res Inst, Hangzhou 310027, Peoples R China;[3]Shaoxing Univ, Inst Artificial Intelligence, Shaoxing 312000, Peoples R China

年份：2024

卷号：24

外文期刊名：RESULTS IN ENGINEERING

收录：ESCI(收录号：WOS:001352259400001)、EI(收录号：20244517320671)、Scopus(收录号：2-s2.0-85208035270)、WOS

语种：英文

外文关键词：Cement soil; Sugarcane bagasse ash; Unconfined compressive strength; Triaxial shear strength; Microstructural analysis

外文摘要：Sugarcane bagasse ash is a kind of agricultural waste with a large quantity and good volcanic ash reactivity, it is necessary to find a way to reasonably utilize it to prevent environmental pollution caused by long-term accumulation. In this paper, the effect of sugarcane bagasse ash on the short-term mechanical properties of coastal cement soil were studied, and unconfined compressive tests and triaxial shear tests were carried out. The sugarcane bagasse ash content was set to 0 %, 1 %, 2 %, 3 %, 4 % and 5 %, respectively, the cement content was set to 5 %, and the curing age was set at 7d. The test results show that sugarcane bagasse ash can effectively improve the unconfined compressive strength and triaxial shear strength of cement soil, exhibiting a trend of increasing first and then decreasing with the increase of its content. When the sugarcane bagasse ash content is 1 %, the unconfined compressive strength reaches the maximum value of 2040 kPa, which is 56 % and 8 % higher than that of cement soil with 5 % and 7 % cement content, respectively. Compared with cement soil with 5 % cement content, the triaxial shear strength increases by 12 %similar to 17 %, the internal friction angle phi and cohesion c increases by 3 %similar to 8 % and 2 %similar to 11 %, respectively. The SEM test results show that the addition of bagasse ash can promote the hydration of cement to produce hydrated calcium silicate and other hydration products, fill the internal pores of the sample, and make the microstructure of the modified cement soil tend to be dense. The research results provide a reference for the application of sugarcane bagasse ash modified cement soil in practical engineering.