Effects of H3PO4 and Ca(H2PO4)(2) on mechanical properties and water resistance of thermally decomposed magnesium oxychloride cement

ISL OpenIR > 青海盐湖研究所知识仓储

	Effects of H3PO4 and Ca(H2PO4)(2) on mechanical properties and water resistance of thermally decomposed magnesium oxychloride cement
	Wen Jing1,2 ; Yu Hong-fa1,3,4 ; Li Ying 1,2; Wu Cheng-you 1,2; Dong Jin-mei1,2 ; Zheng Li-na 1,2
	2013-12-01
发表期刊	JOURNAL OF CENTRAL SOUTH UNIVERSITY
卷号	20 期号:12 页码:3729-3735
关键词	Thermally Decomposed Magnesium Oxychloride Cement (Tdmoc) H3po4 Ca(H2po4)(2) Strength Water Resistance Hydration Heat
摘要	The effects of H3PO4 and Ca(H2PO4)(2) on compressive strength, water resistance, hydration process of thermally decomposed magnesium oxychloride cement (TDMOC) pastes were studied. The mineral composition, hydration products and hydration heat release were analyzed by XRD, FT-IR, SEM and TAM air isothermal calorimeter, etc. After being modified by H3PO4 and Ca(H2PO4)(2), the properties of the TDMOC are improved obviously. The compressive strength increases from 14.8 MPa to 48.1 MPa and 37.1 MPa, respectively. The strength retention coefficient (K-n) increases from 0.38 to 0.99 and 0.94, respectively. The 24 h hydration heat release decreases by 10% and 4% and the time of hydration peak appearing is delayed from 1 h to about 10 h. The XRD, FT-IR and SEM results show that the main composition is 5Mg(OH)(2)center dot MgCl2 center dot 8H(2)O in the modified TDMOC pastes. The possible mechanism for the strength enhancement was discussed. The purposes are to extend the potential applications of the salt lake magnesium resources and to improve the mechanical properties of TDMOC.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/4420
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所盐湖资源与化学实验室
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.Qinghai Univ, Dept Civil Engn, Xining 810016, Peoples R China 4.Nanjing Univ Aeronaut & Astronaut, Dept Civil Engn, Nanjing 210016, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Wen Jing,Yu Hong-fa,Li Ying,et al. Effects of H3PO4 and Ca(H2PO4)(2) on mechanical properties and water resistance of thermally decomposed magnesium oxychloride cement[J]. JOURNAL OF CENTRAL SOUTH UNIVERSITY,2013,20(12):3729-3735.
APA	Wen Jing,Yu Hong-fa,Li Ying,Wu Cheng-you,Dong Jin-mei,&Zheng Li-na.(2013).Effects of H3PO4 and Ca(H2PO4)(2) on mechanical properties and water resistance of thermally decomposed magnesium oxychloride cement.JOURNAL OF CENTRAL SOUTH UNIVERSITY,20(12),3729-3735.
MLA	Wen Jing,et al."Effects of H3PO4 and Ca(H2PO4)(2) on mechanical properties and water resistance of thermally decomposed magnesium oxychloride cement".JOURNAL OF CENTRAL SOUTH UNIVERSITY 20.12(2013):3729-3735.