复合缓凝剂对高强磷酸镁修补砂浆性能的影响

摘要/Abstract

摘要： 本文研究了一元缓凝体系和二元复合缓凝体系对高强磷酸镁修补砂浆凝结时间、流动性能和力学性能的影响。结果表明:在一元缓凝体系中,与硼砂和三聚磷酸钠相比,单掺蔗糖的缓凝效果最优,但蔗糖掺量过高会显著降低磷酸镁修补砂浆的流动性能和早期力学性能;在二元复合缓凝体系中,硼砂和蔗糖组成的二元缓凝体系的缓凝效果优于硼砂和三聚磷酸钠组成的二元缓凝体系,在硼砂5%(质量分数)和蔗糖2.5%(质量分数)时,磷酸镁修补砂浆的凝结时间达到18 min,流动度为230 mm,1.5 h、3 d和28 d强度分别为22.6 MPa、56.8 MPa和62.4 MPa,实现了磷酸镁修补砂浆在凝结时间和早期强度之间的动态平衡。

关键词: 磷酸镁水泥, 修补砂浆, 复合缓凝剂, 蔗糖, 硼砂, 三聚磷酸钠, 凝结时间, 流动度

Abstract: The effects of unitary retarder system and binary complex retarder system on setting time, fluidity and mechanical properties of high strength magnesium phosphate repair mortar were studied. The results show that in unitary retarder system, compared with borax and sodium tripolyphosphate, the retardation effect of sucrose alone is the best. But excessive content of sucrose significantly reduces the fluidity and early mechanical properties of magnesium phosphate repair mortar. In the binary complex retarder system, the retardation effect of borax and sucrose is better than borax and sodium tripolyphosphate. Under 5% (mass fraction) borax and 2.5% (mass fraction) sucrose, the setting time of magnesium phosphate repair mortar reaches 18 min, the fluidity is 230 mm, and the strength of 1.5 h, 3 d and 28 d is 22.6 MPa, 56.8 MPa and 62.4 MPa, respectively. The setting time and early strength of magnesium phosphate repair mortar achieve dynamic balance.

Key words: magnesium phosphate cement, repair mortar, complex retarder, sucrose, borax, sodium tripolyphosphate, setting time, fluidity

中图分类号:

TU528

杨辉, 徐鹏, 袁伟, 李磊, 柯伟席, 田晓航, 周天正. 复合缓凝剂对高强磷酸镁修补砂浆性能的影响[J]. 硅酸盐通报, 2022, 41(5): 1562-1569.

YANG Hui, XU Peng, YUAN Wei, LI Lei, KE Weixi, TIAN Xiaohang, ZHOU Tianzheng. Effect of Complex Retarder on Properties of High Strength Magnesium Phosphate Repair Mortar[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(5): 1562-1569.

参考文献

[1] 汪宏涛,曹巨辉,薛明,等.新型超快硬磷酸盐水泥修补材料的研究[J].新型建筑材料,2009,36(7):49-51.
WANG H T, CAO J H, XUE M, et al. Study on the new phosphate cement repair material with super rapid hardening[J]. New Building Materials, 2009, 36(7): 49-51 (in Chinese).
[2] 徐颖,邓利蓉,杨进超,等.磷酸镁水泥的制备及其快速修补应用研究进展[J].材料导报,2019,33(s2):278-282.
XU Y, DENG L R, YANG J C, et al. Preparation and rapid repair application of magnesium phosphate cement[J]. Materials Reports, 2019, 33(s2): 278-282 (in Chinese).
[3] 李悦,苏迎秋,梅期威,等.磷酸镁水泥(MPC)及其作为FRP粘结剂的研究进展[J].硅酸盐通报,2019,38(3):659-663+672.
LI Y, SU Y Q, MEI Q W, et al. Research progress of magnesium phosphate cement (MPC) and its application as FRP binder[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(3): 659-663+672 (in Chinese).
[4] 张爱莲,张林春,俞金艳,等.磷酸镁水泥基材料力学性能研究[J].硅酸盐通报,2020,39(2):422-427.
ZHANG A L, ZHANG L C, YU J Y, et al. Research on mechanical performance of magnesium phosphate cement-based materials[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(2): 422-427 (in Chinese).
[5] 高明,刘宁,陈兵.微硅粉改性磷酸镁水泥砂浆试验研究[J].建筑材料学报,2020,23(1):29-34.
GAO M, LIU N, CHEN B. Effect of silica fume on properties of magnesium phosphate cement mortar[J]. Journal of Building Materials, 2020, 23(1): 29-34 (in Chinese).
[6] 田海涛,吴佳育,关博文.粉煤灰对磷酸镁水泥早期性能的影响[J].硅酸盐通报,2019,38(6):1812-1817.
TIAN H T, WU J Y, GUAN B W. Effect of fly ash on rheological properties of magnesium phosphate cement[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(6): 1812-1817 (in Chinese).
[7] 孙佳龙,黄煜镔,范英儒,等.磷酸镁水泥用作道路的快速修补材料研究[J].功能材料,2018,49(1):1040-1043.
SUN J L, HUANG Y B, FAN Y R, et al. Magnesium phosphate cement as rapid road repair material[J]. Journal of Functional Materials, 2018, 49(1): 1040-1043 (in Chinese).
[8] 戴丰乐,汪宏涛,丁建华,等.氧化镁与磷酸盐质量比对磷酸镁水泥水化历程的影响[J].硅酸盐学报,2017,45(8):1144-1152.
DAI F L, WANG H T, DING J H, et al. Effect of magnesia/phosphate ratio on hydration processes of magnesium phosphate cement[J]. Journal of the Chinese Ceramic Society, 2017, 45(8): 1144-1152 (in Chinese).
[9] 曾翠云,万德刚,董峰亮,等.粉煤灰改性磷酸镁水泥耐久性能的试验研究[J].粉煤灰综合利用,2017,30(3):27-30+34.
ZENG C Y, WAN D G, DONG F L, et al. Experimental study on durability of fly ash modified magnesium phosphate cement[J]. Fly Ash Comprehensive Utilization, 2017, 30(3): 27-30+34 (in Chinese).
[10] 李十泉,于旭峰,操乐娟,等.粉煤灰改性磷酸镁水泥试验研究[J].混凝土,2019(4):111-113.
LI S Q, YU X F, CAO L J, et al. Research of mixing ratio and fly ash modification of magnesium phosphate cement[J]. Concrete, 2019(4): 111-113 (in Chinese).
[11] 秦国新,焦宝祥.磷酸镁水泥的研究进展[J].硅酸盐通报,2019,38(4):1075-1079+1085.
QIN G X, JIAO B X. Review of magnesium phosphate cement performance[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(4): 1075-1079+1085 (in Chinese).
[12] 徐选臣,邵云霞.水灰比对磷酸钾镁水泥性能的影响[J].硅酸盐通报,2013,32(2):236-241.
XU X C, SHAO Y X. The effect of ratio of water to binder on the properties of magnesium potassium phosphate cement paste[J]. Bulletin of the Chinese Ceramic Society, 2013, 32(2): 236-241 (in Chinese).
[13] 冯春花,陈苗苗,李东旭.磷酸镁水泥的水化体系[J].材料科学与工程学报,2013,31(6):901-906.
FENG C H, CHEN M M, LI D X. Hydration system of magnesium phosphate cement paste[J]. Journal of Materials Science and Engineering, 2013, 31(6): 901-906 (in Chinese).
[14] SARKAR A K. Hydration/dehydration characteristics of struvite and dittmarite pertaining to magnesium ammonium phosphate cement system[J]. Journal of Material Science, 1991, 26(9): 2514-2518.
[15] HALL D A, STEVENS R, EI-JAZAIRI B. The effect of retarders on the microstructure and mechanical properties of magnesium-phosphate cement mortar[J]. Cement and Concrete Research, 2001, 31(3): 455-465.
[16] 杨建明,钱春香,焦宝祥,等.缓凝剂硼砂对磷酸镁水泥水化硬化特性的影响[J].材料科学与工程学报,2010,28(1):31-36.
YANG J M, QIAN C X, JIAO B X, et al. Effects of retardant borax on hydration and harden process of magnesia-phosphate cement pastes[J]. Journal of Materials Science and Engineering, 2010, 28(1): 31-36 (in Chinese).
[17] 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):115-118.
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): 115-118 (in Chinese).
[18] 段新勇,吕淑珍,赖振宇,等.多元复合缓凝剂制备及其对磷酸镁水泥性能的影响[J].武汉理工大学学报,2014,36(10):20-25.
DUAN X Y, LV S Z, LAI Z Y, et al. Preparation of a multi-composite retarder and its effect on properties of magnesium phosphate cement[J]. Journal of Wuhan University of Technology, 2014, 36(10): 20-25 (in Chinese).
[19] 宋旭艳,严良海,韩静云,等.缓凝剂对磷酸镁水泥的早期性能影响[J].非金属矿,2018,41(6):33-36.
SONG X Y, YAN L H, HAN J Y, et al. Influence of retarders on early property of magnesium phosphate cement[J]. Non-Metallic Mines, 2018, 41(6): 33-36 (in Chinese).
[20] 谈笑玲,乔丽,张卫华.超快硬磷酸镁水泥研究进展[J].无机盐工业,2016,48(9):5-9.
TAN X L, QIAO L, ZHANG W H. Research progress in super rapid hardening magnesium phosphate cement[J]. Inorganic Chemicals Industry, 2016, 48(9): 5-9 (in Chinese).