Effect of Fine Aggregates on Properties of Magnesium Potassium Phosphate Cement Mortar
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 10
Abstract
This paper aims to investigate the effect of fine aggregates on properties of magnesium potassium phosphate cement (MKPC) mortar. River sand (RS), limestone sand (LS), and mixed aggregates (RS/LS mixture) were used to prepare MKPC mortar, respectively. Then, the fluidity, mechanical strength, shrinkage deformation, and hydration temperature of different MKPC mortars were tested. Compared with MKPC mortar prepared using RS, MKPC mortar prepared using LS has significantly higher 60-day flexural strength, slightly higher 60-day compressive strength and 60-day shrinkage strain, and lower 60-day flexural strength residual ratio under water curing condition. Compared with MKPC prepared using LS, MKPC mortar prepared using mixed aggregates has higher 60-day compressive strength, higher strength residual ratio under water curing condition, and lower 60-day shrinkage strain. Also, the effect of the ratio of aggregates to a binder (MKPC) on properties of MKPC mortar is investigated. Results show that the optimal aggregates to binder ratio for MKPC mortar prepared using mixed aggregates ( to ratio is ) is , resulting in high strength and low binder content of MKPC mortar. When to ratio is and aggregates to binder ratio is , 60-day flexural and compressive strengths of MKPC mortar are greater than 40% higher than that of MKPC mortar prepared using RS; 60-day flexural and compressive strength residual ratios of it are above 80%, and its shrinkage deformation is close to that of MKPC mortar prepared using RS.
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Acknowledgments
This work was supported by National Natural Science Foundation of China (51578475), Ministry of housing and urban rural construction research and development projects 2014-K4-031, 2014-K4-024. The authors thank all the anonymous reviewers for helping to improve this paper.
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 10 • October 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Apr 16, 2016
Accepted: Feb 28, 2017
Published online: Jul 14, 2017
Published in print: Oct 1, 2017
Discussion open until: Dec 14, 2017
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