The influence of FeSO4 and KH2PO4 on the performance of magnesium oxychloride cement

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	The influence of FeSO4 and KH2PO4 on the performance of magnesium oxychloride cement
	Li, Ying1,2 ; Li, Zongjin 2; Pei, Huafu 2; Yu, Hongfa 1,3
	2016-01-15
发表期刊	CONSTRUCTION AND BUILDING MATERIALS
卷号	102 页码:233-238
关键词	Magnesium Oxychloride Cement Sulfate Phosphate Mechanical Strength Water Resistance Thermal Stability Micro Structure
摘要	As well known, sulfate and phosphate are widely used additives for MOC products. In this work, the influence of FeSO4 and KH2PO4 on the properties of magnesium oxychloride cement (MOC) such as compressive strength, water resistance, thermal stability, composition and micro structure were studied in detail by using material testing system (MTS), X-Ray diffraction (XRD), thermogravimetry and differential scanning calorimetry (TG-DSC), scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP), respectively. The results show that both FeSO4 and KH2PO4 incorporation can benefit the formation of gel-like 5Mg(OH)(2)center dot MgCl2 center dot 8H(2)O (P5) and the water resistance of MOC. However, the FeSO4 and KH2PO4 incorporation can downgrade the thermal stability and the mechanical strength. The influence of KH2PO4 is more obvious than that of FeSO4. In addition, the hindering hydration of MgO caused by sulfate and phosphate ions result in reduction of the hydration product, while the double hydrolysis reaction between Fe2+ and MgCO3 leads to slight increase of the resultant in the slurry of MOC. (C) 2015 Elsevier Ltd. All rights reserved.
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/363002/6286
专题	青海盐湖研究所知识仓储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.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China 3.Nanjing Univ Aeronaut & Astronaut, Dept Civil Engn, Nanjing 210016, Peoples R China
推荐引用方式 GB/T 7714	Li, Ying,Li, Zongjin,Pei, Huafu,et al. The influence of FeSO4 and KH2PO4 on the performance of magnesium oxychloride cement[J]. CONSTRUCTION AND BUILDING MATERIALS,2016,102:233-238.
APA	Li, Ying,Li, Zongjin,Pei, Huafu,&Yu, Hongfa.(2016).The influence of FeSO4 and KH2PO4 on the performance of magnesium oxychloride cement.CONSTRUCTION AND BUILDING MATERIALS,102,233-238.
MLA	Li, Ying,et al."The influence of FeSO4 and KH2PO4 on the performance of magnesium oxychloride cement".CONSTRUCTION AND BUILDING MATERIALS 102(2016):233-238.