文献类型：期刊文献

中文题名：碳化过程对水泥土力学特性影响的研究与评价

英文题名：Experimental and evaluation on the influence of carbonation process on the mechanical properties of cement soil

作者：王伟[1];周航[1];李健[1];李娜[1]

机构：[1]绍兴文理学院土木工程学院,浙江绍兴312000

年份：2021

卷号：18

期号：12

起止页码：3239

中文期刊名：铁道科学与工程学报

外文期刊名：Journal of Railway Science and Engineering

收录：CSTPCD、、EI(收录号：20220911740943)、北大核心、CSCD、北大核心2020、CSCD_E2021_2022

基金：国家自然科学基金资助项目(41772311)。

语种：中文

中文关键词：水泥土;碳化;无侧限抗压强度;能量耗散率

外文关键词：cement soil;carbonation;unconfined compressive strength;energy dissipation rate

中文摘要：为了探究水泥掺量和碳化时间对水泥土(简称CS)的改性效果,对水泥质量分数为10%,15%,20%和25%,碳化时间为0 h和6 h,1,2和4 d的CS进行无侧限抗压强度测试。研究水泥掺量和碳化时间对CS的抗压强度、峰值应变和能量耗散的影响。研究发现:1)不同碳化时间下,掺入20%水泥的CS抗压强度提高最显著;不同水泥掺量下,分别碳化2,2,1 d和6 h的CS抗压强度最大,较未碳化CS的提高幅度在51.5%~171.1%之间。2)不同水泥掺量下,碳化2 d的CS峰值应变增加最显著,与未碳化CS的差值在3.1%~4.6%之间,能够较好提高CS的延性。3)不同水泥掺量下,分别碳化2,1,1和1 d的CS的能量耗散率最大,与未碳化的CS的差值在0.08~0.13之间,抵抗外部破坏的能力最强。

外文摘要：In order to explore the modification effect of cement content and carbonation time on cement soil(CS),unconfined compressive strength of CS specimen with cement mass fraction of 10%, 15%, 20% and 25% and carbonation time of 0 h and 6 h, 1, 2 and 4 d were tested. The influence of cement content and carbonation time on compressive strength, peak strain and energy dissipation of CS were studied. The results show that:(1) the compressive strength of CS with 20% cement content increases most significantly under different carbonation time. The compressive strength of CS carbonated for 2, 2, 1 d and 6 h under different cement content are the highest, and the increase range is 51.5%~171.1% compared with non-carbonated CS.(2) the peak strain of CS increases most significantly in carbonated 2 d under different cement content, which can improve the ductility of CS, and the difference between carbonated and non-carbonated CS is between 3.1%~4.6%.(3) the energy dissipation rate of CS carbonated for 2, 1, 1 and 1 d under different cement content are the largest, which shows the strongest resistance to external damage, and the difference between CS carbonated and non-carbonated is between 0.08~0.13.