Na2SO4·10H2O对磷酸钾镁水泥水化硬化的影响*

doi:10.11896/j.issn.1005-023X.2017.023.028

Abstract
Figure/Table
References
Related Citation (9)

Download:

Full Text ( PDF ) (3941KB)
Export: BibTeX | EndNote (RIS)

Abstract Too fast setting and hardening rate as well as concentrative hydration heat of magnesium potassium phosphate cements restrict its extensive engineering application seriously. Endothermic energy storage of phase change material offers a new way for solving the problems. Effect of inorganic phase change material Na₂SO₄· 10H₂O(NS) on hydration temperature,work perfor-mances and compressive strength of magnesium potassium phosphate cement(MKPC) were investigated. Moreover, influence mechanism of NS on properties of MKPC were researched with the aids of XRD, FT-IR, SEM analyses and hydration heat release rate. The result showed that solution and phase change process of NS absorbed a multitude of hydration heat and released crystalliferous water, which attenuated solution rate and concentration of Mg²⁺, PO^3-₄ and H⁺ in system of MKPC. So rate of interior hydration of MKPC reaction diminished, causing prolonged setting time, increased fluidity, and mild hydration heat release and temperature rise. In early hydration process, with NS content increase, early strength of MKPC diminish slightly. Under a certain content of NS (≤ 4%), the crystallinity of hydration products increased, and the long-term strength of MKPC increased steadily. 28 d compressive strength of MKPC with 2% NS was higher than that of the reference group.

Key words： Na₂SO₄·10H₂O magnesium potassium phosphate cement phase change decalescence hydrate calefactive hydration products crystallinity

Published: 08 May 2018

CLC number:

TB321

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZHAO Sixie
	YAN Hua
	WANG Hongtao
	LI Yuntao
	ZHANG Hansong
	HU Zhide

Cite this article:

ZHAO Sixie,YAN Hua,WANG Hongtao, et al. Influence of Na₂SO₄·10H₂O on Hydration and Hardening of Magnesium Potassium Phosphate Cement[J]. Materials Reports, 2017, 31(23): 187-192.

URL:

http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.023.028 OR http://www.mater-rep.com/EN/Y2017/V31/I23/187

1 Wang H T,Qian J S, Wang J G. Review of magnesia-phosphate cement[J]. Mater Rev, 2005,12(2):46(in Chinese).
汪宏涛, 钱觉时, 王建国. 磷酸镁水泥的研究进展[J]. 材料导报, 2005,12(2):46.
2 Yang Q, Zhu B, Wu X. Characteristics and durability test of magnesium phosphate cement-based material for rapid repair of concrete[J]. Mater Struct, 2000,33(4):229.
3 Li J, Zhang W, Cao Y. Laboratory evaluation of magnesium phosphate cement paste and mortar for rapid repair of cement concrete pavement[J]. Constr Building Mater, 2014,5(8):122.
4 Ding Z, Li Z. High-early-strength magnesium phosphate cement with fly ash[J]. ACI Mater J, 2005,102(6):375.
5 Buj I, Torras J, Rovira M, et al. Leaching behavior of magnesium phosphate cements containing high quantities of heavy metals[J]. J Hazard Mater, 2010,175(1):789.
6 Li C M, Wang P M, Wang A, et al. Effect of admixtures on properties of magnesium phosphate cement and the mechanism[J]. Concrete, 2015(1):115(in Chinese).
李春梅, 王培铭, 王安, 等. 掺合料对磷酸镁水泥的性能影响及机理研究[J]. 混凝土, 2015(1):115.
7 Ji F, Jiao B X, Qiu T. The effects of urea on setting time and hydration exothermic of magnesium phosphate cement[J]. China Concr Cem Products, 2013(5):1(in Chinese).
吉飞, 焦宝祥, 丘泰. 尿素对磷酸镁水泥凝结时间和水化放热的影响[J]. 混凝土与水泥制品, 2013(5):1.
8 Gao G B, Qian C X, Zhuang Y, et al. Research on use of phase change materials for reduction of internal temperature rise of mass concrete[J]. J Hydroelectric Eng, 2010, 29(1):197(in Chinese).
高桂波, 钱春香, 庄园,等. 用相变材料降低大体积混凝土内部温升的研究[J]. 水力发电学报, 2010,29(1):197.
9 Shi W, Hou J P. Temperature control properties of mass concrete with phase change material in different condition[J]. J Building Mater, 2013, 16(6):1063(in Chinese).
史巍, 侯景鹏. 不同条件下相变控温大体积混凝土的控温性能[J]. 建筑材料学报, 2013,16(6):1063.
10Zhou S X, Rong M G, Zuo S, et al. Temperature control properties of composite phase change materials in mass concrete[J]. J East China Jiaotong University, 2013,30(4):30(in Chinese).
周双喜, 荣茂阁, 左晟,等. 复合相变储能材料在大体积混凝土中的控温性能[J]. 华东交通大学学报, 2013,30(4):30.
11Wang J. Study on the basic throries and preparation of phase change and temperature self-control concrete[D]. Wuhan: Wuhan University of Technology, 2011(in Chinese).
王军. 相变控温混凝土的理论基础研究和制备[D]. 武汉: 武汉理工大学, 2011.
12Li Y T,Yan H,Wang H T,et al. Preparation of composite phase change materials and its effect on the hydration heat of magnesium phosphate cement[J]. J Funct Mater, 2016, 47(7):07211(in Chinese).
李云涛, 晏华, 汪宏涛, 等. 复合相变材料的制备及其对磷酸镁水泥水化热的影响[J].功能材料, 2016, 47(7):07211.
13 Li Y T, Yan H, Wang H T, et al. Effect of paraffin/expand grap-hite composite phase change material on the hydration performance of magnesium phosphate cement[J]. Bull Chin Ceram Soc, 2016,35(9):3007(in Chinese).
李云涛, 晏华, 汪宏涛, 等. 石蜡/膨胀石墨复合相变材料对磷酸镁水泥水化性能的影响[J]. 硅酸盐通报, 2016,35(9):3007.
14Yang J M, Qian C X, Jiao B X, et al. Effect of NaH2PO4?10H2O on hydration hardening of potassium and magnesium phosphate cement[J]. J Building Mater, 2011,14(3):299(in Chinese)
杨建明, 钱春香, 焦宝祥, 等. NaH2PO4?10H2O对磷酸镁水泥水化硬化特性的影响[J]. 建筑材料学报,2011,14(3):299..
15Qi Z Q. Research on shrinkage performance and reduction measures of magnesium phosphate cement[D].Chongqing: Logistical Engineering University, 2015(in Chinese).
齐召庆.磷酸镁水泥石收缩性能及减缩措施研究[D]. 重庆:后勤工程学院, 2015.
16Jiang Zichao.Research on influencing factors and mechanism of permeability of magnesium phosphate cement[D]. Chongqing: Logistical Engineering University, 2017(in Chinese).
姜自超. 磷酸镁水泥渗透性影响因素及机理研究[D]. 重庆: 后勤工程学院, 2017.
17Chang Y, Shi C J, Yang N, et al. Effect of fineness of magnesium oxide on properties of magnesium potassium phosphate cement[J]. J Chin Ceram Soc, 2013,41(4):492(in Chinese).
常远, 史才军, 杨楠, 等. 不同细度 MgO 对磷酸钾镁水泥性能的影响[J]. 硅酸盐学报, 2013,41(4):492.
18Lai Z Y, Lai X, Shi J, et al. Effect of Zn2+ on the early hydration behavior of potassium phosphate based magnesium phosphate cement[J]. Constr Building Mater, 2016,129:70.
19Dai Fengle. Study on the hydration mechanism phosphate cement based on thermodynamics[D]. Chongqing: Logistical Engineering University, 2017(in Chinese).
戴丰乐. 基于热动力学的磷酸镁水泥水化机理研究[D]. 重庆: 后勤工程学院, 2017.