Properties of Phosphate Cement Mortar Used as Rapid-Repair Material

Abstract:

In order to determine the optimal proportion of magnesium phosphate cement mortar, the influences of ratio of magnesium phosphate cement-based binder (MPB) to sand (MPB/S), effects of fly ash on fluidity and strength development of MPB mortar, and the compatibility between MPB and traditional concrete and shrinkage of MPB mortar were investigated in this paper. The optimal proportion in this test was: setting adjusting agent of 12%, P/M ratio of 1:2(in weight), MPB/S ratio of 1:1 and FA/S ratio of 15%. The results showed that the MPB mortar met the higher early strength requirement of rapid-repair materials, with compressive strength beyond 50MPa and flexural strength more than 9.1MPa at 3 hours, and at later ages no reduction of strength happened. There was a good compatibility between MPB and traditional concrete. The shrinkage of MPB mortar at 28 days was less than 2.89 × 10^-4. Therefore MPB is very suitable for rapid repairing of concrete structures.

• Periodical: Advanced Materials Research (Volumes 250-253)
• Pages: 1752-1756
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.250-253.1752
• Online since: May 2011
• Authors: Hong Wei Deng, Ying Zi Yang, Xiao Jian Gao
• Keywords: Magnesium Phosphate Binder (MPB), Mechanical Property, Rapid Repair Material, Shrinkage

References

[1] E. Soudée, J. Péra, Cement and Concrete Research 30 (2000), p: 315–321

[2] Q.B. Yang , X.L. Wu, Cement and Concrete Research 29 (1999),p :389–396

[3] F. Q., C.K. Chau, Z.J Li, Construction and Building Materials 24 (2010), p: 695–700

[4] Q.B. Yang, B.R. Zhu, S.Q. Zhang, X.L. Wu, Cement and Concrete Research 30 (2000), p: 1807-1813

[5] X.J.GAO, Y.Z.YANG, H.W.DENG, Journal of Sichuan University(Engineering Science Edition), 2010(2), p:35-41

[6] E. S, J.P, Cement and Concrete Research, 2002, 32(1), p: 153–157.

[7] H. D A, S. R, J. B E. ,Cement and Concrete Research, 2001, 31(3), p: 455–465.

[8] H.T. Wang, J.H. Cao, Journal of Logistical Engineering University, 2007, 23(2):84-87.

[9] Q. Yang, B. Zhu and X. Wu, Materials and Structures/Mat6riaux et Constructions, Vol. 33, 2000, p : 229-234