Correlation Evaluation between Water Resistance and Pore Structure of Magnesium Oxychloride Cement Mixed with Highland Barley Straw Ash

doi:10.1061/(ASCE)MT.1943-5533.0004417

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	Correlation Evaluation between Water Resistance and Pore Structure of Magnesium Oxychloride Cement Mixed with Highland Barley Straw Ash
	Cao, Feng 1,2; Qiao, Hongxia 1,2; Li, Yuanke 1; Shu, Xiuyuan 1; Li, Weijia 2
刊名	JOURNAL OF MATERIALS IN CIVIL ENGINEERING
	2022-10-01
卷号	34 期号:10
关键词	Magnesium oxychloride cement (MOC) Highland barley straw ash (HBSA) Water resistance Pore structure Correlation
ISSN号	0899-1561
DOI	10.1061/(ASCE)MT.1943-5533.0004417
英文摘要	Magnesium oxychloride cement (MOC) is a new type of cement with high early strength and good brine corrosion resistance. However, the water resistance of MOC is poor, which limits its current application. Highland barley straw ash (HBSA) contains a large amount of silica and, when calcined and ground under certain conditions, has a higher pozzolanic effect. This study investigated the effect of adding HBSA on the water resistance and pore structure of MOC mortar (MOCM), and the correlation between them. HBSA was mixed with MOCM in different proportions to test the water adsorption and water resistance. Nuclear magnetic resonance technology and the Brunauer-Emmett-Teller method were then used to test the distribution of full pores and micropores, respectively, in MOCM. Finally, the gray entropy theory was used to analyze the correlation between all the pore parameters of MOCM and the water resistance, and the numerical relationship between the softening coefficient reflecting the water resistance of MOCM and the characteristic pore parameters was determined. Results showed that the water adsorption of MOCM with added 10% HBSA decreased by 2.11%, the water resistance increased by 6.80%, and the proportion of harmful pores and more harmful pores decreased by 25.11% compared with that without HBSA. Three pore characteristic parameters-the proportion of less harmful pores, most probable diameter within the range of 20 nm, and accumulated micropore volume-had a good linear correlation with the water resistance of MOCM.
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
语种	英语
出版者	ASCE-AMER SOC CIVIL ENGINEERS
WOS记录号	WOS:000843195500040
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159815]
专题	土木工程学院
作者单位	1.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Peoples R China; 2.Qinghai Minzu Univ, Sch Civil & Transportat Engn, Xining 810000, Qinghai, Peoples R China
推荐引用方式 GB/T 7714	Cao, Feng,Qiao, Hongxia,Li, Yuanke,et al. Correlation Evaluation between Water Resistance and Pore Structure of Magnesium Oxychloride Cement Mixed with Highland Barley Straw Ash[J]. JOURNAL OF MATERIALS IN CIVIL ENGINEERING,2022,34(10).
APA	Cao, Feng,Qiao, Hongxia,Li, Yuanke,Shu, Xiuyuan,&Li, Weijia.(2022).Correlation Evaluation between Water Resistance and Pore Structure of Magnesium Oxychloride Cement Mixed with Highland Barley Straw Ash.JOURNAL OF MATERIALS IN CIVIL ENGINEERING,34(10).
MLA	Cao, Feng,et al."Correlation Evaluation between Water Resistance and Pore Structure of Magnesium Oxychloride Cement Mixed with Highland Barley Straw Ash".JOURNAL OF MATERIALS IN CIVIL ENGINEERING 34.10(2022).