Properties and reaction mechanisms of magnesium phosphate cement mixed with ferroaluminate cement

doi:10.3390/ma12162561

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Properties and reaction mechanisms of magnesium phosphate cement mixed with ferroaluminate cement
	Jia, Liang 2; Zhao, Fangli 2; Guo, Jian 2; Yao, Kai 1
刊名	Materials
	2019-08-01
卷号	12 期号:16
关键词	Cements Chemical analysis Curing Hydration Magnesia Oxide minerals Phosphates Spectrometers Cementitious materials Chemical compositions Colloidal substances Magnesium phosphate cement Properties Reaction mechanism Scanning electron microscopic Water-resistances
DOI	10.3390/ma12162561
英文摘要	A certain amount of ferroaluminate cement (FAC) was substituted for MgO during the magnesium phosphate cement (MPC) preparation to obtain the MPC-FAC composite cement. The influence of FAC on the strength, water resistance, pH, and setting time of MPC-FAC composite cement were examined. The microstructure and chemical composition were also analyzed by adopting scanning electron microscopic energy-dispersive spectrometer and X-ray diffraction, respectively. The study showed that setting time of MPC-FAC composite cement was dramatically prolonged when FAC substitution for MgO was between 30 and 40 wt %. The strength of MPC-FAC did not decrease during the early curing time (1 h and 1 d), whereas it increased during the late curing time (3, 7, and 28 days). Moreover, the existence of FAC decreased the hydrated product K-struvite during the early curing time and thus dramatically enhanced the water-resistance of MPC-FAC.With the addition of FAC, a large number of cementitious materials of AFt and AFm, as well as flocculent colloidal substances of AH3, C-S-H, and FH3, were generated during the hydration of MPC, which were filled in the internal pore of the hydrate. Thus, the internal compactness of the sample increased, while the compact protective covering layer was generated on the surface to enhance the water resistance and strength in the late curing time. © 2019 by the authors.
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
语种	英语
出版者	MDPI AG
WOS记录号	WOS:000484464800062
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150494]
专题	土木工程学院
作者单位	1.Department of Civil and Environmental Engineering, National University of Singapore, 117576, Singapore 2.College of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Jia, Liang,Zhao, Fangli,Guo, Jian,et al. Properties and reaction mechanisms of magnesium phosphate cement mixed with ferroaluminate cement[J]. Materials,2019,12(16).
APA	Jia, Liang,Zhao, Fangli,Guo, Jian,&Yao, Kai.(2019).Properties and reaction mechanisms of magnesium phosphate cement mixed with ferroaluminate cement.Materials,12(16).
MLA	Jia, Liang,et al."Properties and reaction mechanisms of magnesium phosphate cement mixed with ferroaluminate cement".Materials 12.16(2019).