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The influence of FeSO4 and KH2PO4 on the performance of magnesium oxychloride cement
Li, Ying1,2; Li, Zongjin2; Pei, Huafu2; Yu, Hongfa1,3
2016-01-15
Source PublicationCONSTRUCTION AND BUILDING MATERIALS
Volume102Pages:233-238
SubtypeArticle
AbstractAs 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.
KeywordMagnesium Oxychloride Cement Sulfate Phosphate Mechanical Strength Water Resistance Thermal Stability Micro Structure
WOS HeadingsScience & Technology ; Technology
WOS KeywordPOWDER DIFFRACTION DATA ; WATER RESISTANCE ; PHASES ; NANOPARTICLES ; MECHANISM ; BEHAVIOR
Indexed BySCI
Language英语
WOS Research AreaConstruction & Building Technology ; Engineering ; Materials Science
WOS SubjectConstruction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS IDWOS:000367635900029
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6286
Collection青海盐湖研究所知识仓储
盐湖资源与化学实验室
Affiliation1.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
Recommended Citation
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.
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