干旱区生态环境知识资源中心(Arid): 低温养护条件下水泥改良风积沙无侧限抗压强度试验研究

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	低温养护条件下水泥改良风积沙无侧限抗压强度试验研究
其他题名	Experimental study on unconfined compressive strength of cement-stabilized aeolian sand cured at low temperature
	阮波; 郑世龙; 丁茴; 聂如松; 阮晨希; 陈栋
来源期刊	铁道科学与工程学报
ISSN	1672-7029
出版年	2020
卷号	17 期号:10 页码:2540-2548
中文摘要	为了研究低温养护对水泥改良风积沙的影响,开展无侧限抗压强度试验研究。试验选用的水泥掺量为4%,5%和6%,压实系数0.90,0.93和0.95。研究了-20 ℃低温养护对水泥改良风积沙的应力应变曲线、无侧限抗压强度、峰值应变和刚度的影响。研究结果表明,低温养护条件下,压实系数0.95时,水泥掺量为4% ,5%和6%时,对应的无侧限抗压强度分别为0.27,0.36和0.54 MPa,峰值应变分别为2.46%,2.69%和2.78%,E_(50)分别为8.26,11.10和14.32 MPa。对比标准养护条件,水泥掺量4%,压实系数0.95时,低温养护的水泥改良风积沙的无侧限抗压强度、峰值应变和E_(50)分别降低了32.5% , 14.0%和18.3%。本文的研究成果对风积沙铁路路基基床的设计、施工有借鉴意义。
英文摘要	In order to study the effect of low temperature on cement-stabilized aeolian sand, a series of unconfined compressive strength tests were carried out. The three different cement content levels of the specimens were 4%, 5% and 6%, and the degree of compaction levels were 0.90, 0.93 and 0.95, respectively. The effect of -20 ℃ low temperature on the stress-strain curve, unconfined compressive strength (UCS), peak strain and stiffness of cement-stabilized aeolian sand was studied. The results show that when the degree of compaction is 0.95 and the cement content is 4%, 5%, and 6%, the UCS is 0.27, 0.36, and 0.54 MPa, the peak strain is 2.46%, 2.69% and 2.78%, and the E_(50) is 8.26, 11.10 and 14.32 MPa, respectively. Compared with standard curing conditions (20 ℃ and 95%HR), the UCS, peak strain and E_(50) of the cement-stabilized aeolian sand cured at low temperature are reduced by 32.5%, 14.0%, and 18.3%, respectively, when the cement content is 4% and the degree of compaction is 0.95. The research results provide reference for the design and construction of railway subgrade layers using aeolian sand.
中文关键词	水泥改良风积沙 ; 塔克拉玛干沙漠 ; 低温养护 ; 无侧限抗压强度 ; 峰值应变 ; 水泥掺量
英文关键词	E_(50) cement-stabilized aeolian sand Taklimakan desert low temperature UCS peak strain E_(50) cement content
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Construction & Building Technology
CSCD记录号	CSCD:6870410
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353891
作者单位	阮波, 中南大学土木工程学院, 长沙, 湖南 410075, 中国. 郑世龙, 中南大学土木工程学院, 长沙, 湖南 410075, 中国. 丁茴, 中南大学土木工程学院, 长沙, 湖南 410075, 中国. 聂如松, 中南大学土木工程学院, 长沙, 湖南 410075, 中国. 阮晨希, 中南大学土木工程学院, 长沙, 湖南 410075, 中国. 陈栋, 深圳市高级中学, 深圳, 广东 518040, 中国.
推荐引用方式 GB/T 7714	阮波,郑世龙,丁茴,等. 低温养护条件下水泥改良风积沙无侧限抗压强度试验研究[J],2020,17(10):2540-2548.
APA	阮波,郑世龙,丁茴,聂如松,阮晨希,&陈栋.(2020).低温养护条件下水泥改良风积沙无侧限抗压强度试验研究.铁道科学与工程学报,17(10),2540-2548.
MLA	阮波,et al."低温养护条件下水泥改良风积沙无侧限抗压强度试验研究".铁道科学与工程学报 17.10(2020):2540-2548.