The effect of seawater curing on properties of magnesium potassium phosphate cement
作者： Jianming Yang , Qingqing Tang , Qisheng Wu , Xiaohua Li , Zhixiang Sun
DOI: 10.1016/J.CONBUILDMAT.2017.02.057
关键词: Compressive strength 、 Crystallinity 、 Composite material 、 Shrinkage 、 Seawater 、 Curing (chemistry) 、 Magnesium 、 Materials science 、 Potassium phosphate 、 Cement
摘要: Abstract This paper investigated the effect of early seawater curing on properties magnesium potassium phosphate cement (MKPC) paste. First, MKPC paste was prepared by mixing overburning MgO powders, KH 2 PO 4 , composite retarder (CR) and water in a certain proportion. Then, we measured compressive strength, drying shrinkage deformation, mass change it under different conditions. The results were as follows. For specimens condition, hydration ages before they soaked had significant their increase. cured after 3-day natural curing, 28-day 60-day strengths 112.8% 105.4% those with same respectively. In addition, strain them (0.82 × 10 −4 ) significantly less than that age condition (5.14 × 10 ). Moreover, higher increase ratio (1.23%). These due to production, degree crystallinity defects MKP crystals, more perfect pore size distribution curing.
sci-hub.se 参考文章(21)
Fei Qiao, Reaction mechanisms of magnesium potassium phosphate cement and its application Ph.D. Thesis. ,(2010)
Jiusu Li, Wenbo Zhang, Yong Cao, Laboratory evaluation of magnesium phosphate cement paste and mortar for rapid repair of cement concrete pavement Construction and Building Materials. ,vol. 58, pp. 122- 128 ,(2014) , 10.1016/J.CONBUILDMAT.2014.02.015
Quanbing Yang, Xueli Wu, Factors influencing properties of phosphate cement-based binder for rapid repair of concrete Cement and Concrete Research. ,vol. 29, pp. 389- 396 ,(1999) , 10.1016/S0008-8846(98)00230-0
M. Mathew, L. W. Schroeder, Crystal structure of a struvite analogue, MgKPO4.6H2O Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. ,vol. 35, pp. 11- 13 ,(1979) , 10.1107/S0567740879002429
Chun-xiang Qian, Jian-Ming Yang, Effect of Disodium Hydrogen Phosphate on Hydration and Hardening of Magnesium Potassium Phosphate Cement Journal of Materials in Civil Engineering. ,vol. 23, pp. 1405- 1411 ,(2011) , 10.1061/(ASCE)MT.1943-5533.0000305
E Soudée, J Péra, Mechanism of setting reaction in magnesia-phosphate cements Cement and Concrete Research. ,vol. 30, pp. 315- 321 ,(2000) , 10.1016/S0008-8846(99)00254-9
Qingzhong Wu, Paul L Bishop, Enhancing struvite crystallization from anaerobic supernatant Journal of Environmental Engineering and Science. ,vol. 3, pp. 21- 29 ,(2004) , 10.1139/S03-050
B.E.I. Abdelrazig, J.H. Sharp, B. El-Jazairi, The chemical composition of mortars made from magnesia-phosphate cement Cement and Concrete Research. ,vol. 18, pp. 415- 425 ,(1988) , 10.1016/0008-8846(88)90075-0
M.J Shannag, Hussein A Shaia, Sulfate resistance of high-performance concrete Cement & Concrete Composites. ,vol. 25, pp. 363- 369 ,(2003) , 10.1016/S0958-9465(02)00049-5
Siyu Zhang, Hui-Sheng Shi, Shao-Wen Huang, Ping Zhang, Dehydration characteristics of struvite-K pertaining to magnesium potassium phosphate cement system in non-isothermal condition Journal of Thermal Analysis and Calorimetry. ,vol. 111, pp. 35- 40 ,(2013) , 10.1007/S10973-011-2170-9