缓凝剂对磷石膏-硫铝酸盐水泥复合胶凝体系性能影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (6): 2131-2039.

所属专题：资源综合利用

缓凝剂对磷石膏-硫铝酸盐水泥复合胶凝体系性能影响

万子恒¹, 金子豪¹, 苏英¹, 王丽玥¹, 王斌²

1.湖北工业大学土木建筑与环境学院,武汉 430068;
2.湖北三峡实验室,宜昌 443000

收稿日期:2023-04-04 修订日期:2023-04-04 出版日期:2023-06-15 发布日期:2023-06-25
通信作者: 金子豪,博士,讲师。E-mail:xiaohao19930113@163.com
作者简介:万子恒(2002—),男。主要从事工业副产石膏的研究。E-mail:1445305705@qq.com
基金资助:
湖北三峡实验室开放基金(SK211011)

Effects of Retarders on Properties of Phosphogypsum-Sulfoaluminate Cement Composite Cementitious System

WAN Ziheng¹, JIN Zihao¹, SU Ying¹, WANG Liyue¹, WANG Bin²

1. School of Civil Architecture and Environment, Hubei University of Technology, Wuhan 430068, China;
2. Hubei Three Gorges Laboratory, Yichang 443000, China

Received:2023-04-04 Revised:2023-04-04 Online:2023-06-15 Published:2023-06-25

摘要/Abstract

摘要： 本文研究了柠檬酸(CA)和蛋白质类(SC)两种缓凝剂对磷石膏-硫铝酸盐水泥复合胶凝体系性能的影响,并对其进行流动度、凝结时间、抗压强度测试,以此来评价复合体系的工作性能和力学性能,通过分析浆体电导率、物相组成和微观形貌的变化来阐明不同缓凝剂的影响机制。结果表明,达到相同的凝结时间时, SC作用下复合胶凝体系的强度损失较CA更小。两种缓凝剂的引入对复合体系水化诱导期和加速期都有一定的抑制作用,同掺量下缓凝剂CA较SC的抑制作用更大。缓凝剂CA会导致二水石膏晶体呈扁平、粗大的结构,对复合体系的力学性能影响更大;而SC会使二水石膏晶体的整体尺度增大,但对晶体形貌影响不大,对复合体系力学性能的劣化作用更小。

关键词: 磷石膏, 硫铝酸盐水泥, 缓凝剂, 凝结时间, 力学性能, 晶体形貌

Abstract: In this paper, the effects of citric acid (CA) and protein retarder (SC) on the properties of phosphogypsum-sulfoaluminate cement composite cementitious system were investigated. The fluidity, setting time and compressive strength were tested to evaluate the workability and mechanical of composite system, and the change of conductivity, phase composition and microstructure were analyzed to clarify the influence mechanism of different retarders. The results show that the strength loss of composite cementitious system under the action of SC is smaller than that of CA when the same setting time is achieved. The addition of two retarders has a certain inhibitory effect on the dissolution of composite system during the hydration induction and the acceleration period, and CA has a greater inhibitory effect than SC at the same content. CA can cause gypsum dihydrate crystals to show a flat and coarse structure, which has a greater impact on the mechanical properties, while SC increases the overall scale of gypsum dihydrate crystals, with little change in crystal morphology, which has a smaller effect on the deterioration of the mechanical properties of composite system.

Key words: phosphogypsum, calcium sulfoaluminate cement, retarder, setting time, mechanical strength, crystal morphology

中图分类号:

TU52

万子恒, 金子豪, 苏英, 王丽玥, 王斌. 缓凝剂对磷石膏-硫铝酸盐水泥复合胶凝体系性能影响[J]. 硅酸盐通报, 2023, 42(6): 2131-2039.

WAN Ziheng, JIN Zihao, SU Ying, WANG Liyue, WANG Bin. Effects of Retarders on Properties of Phosphogypsum-Sulfoaluminate Cement Composite Cementitious System[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(6): 2131-2039.

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缓凝剂对磷石膏-硫铝酸盐水泥复合胶凝体系性能影响

Effects of Retarders on Properties of Phosphogypsum-Sulfoaluminate Cement Composite Cementitious System

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