高贝利特硫铝酸盐水泥改性白水泥的物理力学性能与水化作用

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (10): 3345-3351.

高贝利特硫铝酸盐水泥改性白水泥的物理力学性能与水化作用

兰明章¹, 王浩¹, 陈智丰², 葛仲熙², 王剑锋¹, 裴天蕊¹

1.北京工业大学材料与制造学部,北京 100020;
2.唐山北极熊建材有限公司,唐山 063000

收稿日期:2021-04-23 修回日期:2021-06-22 出版日期:2021-10-15 发布日期:2021-11-11
通讯作者: 王浩,硕士研究生。E-mail:605366456@qq.com
作者简介:兰明章(1964—),男,博士,教授级高工。主要从事水泥基材料、生态建筑材料方面的研究。E-mail:lanmingzhang@bjut.edu.cn
基金资助:
北京市自然科学基金-市教委联合项目(KZ202010005013)

Physical and Mechanical Properties and Hydration of High Belite Sulphoaluminate Cement Modified White Cement

LAN Mingzhang¹, WANG Hao¹, CHEN Zhifeng², GE Zhongxi², WANG Jianfeng¹, PEI Tianrui¹

1. Department of Materials and Manufacturing, Beijing University of Technology, Beijing 100020, China;
2. Tangshan Polar Bear Building Materials Co., Ltd, Tangshan 063000, China

Received:2021-04-23 Revised:2021-06-22 Online:2021-10-15 Published:2021-11-11

摘要/Abstract

摘要： 白色硅酸盐水泥(白水泥)具有较好的白度,是一种具有装饰效果的胶凝材料。针对该种水泥凝结时间长、早期强度发展慢及收缩变形较大等问题,采用高贝利特硫铝酸盐水泥对白水泥进行改性,系统研究了掺入10%~30%(质量分数)的高贝利特硫铝酸盐水泥对白水泥凝结时间、胶砂强度和自由膨胀率的影响。使用水化微量热仪、XRD、TGA、SEM等方法对复合胶凝体系水化过程、水化产物和微观形貌进行分析。结果表明:高贝利特硫铝酸盐水泥增大了白水泥水化放热率,显著缩短了白水泥的凝结时间;改性后的白水泥水化产物生成了大量的AFt,穿插生长在C-S-H凝胶中,消耗掉了部分Ca(OH)₂,使结构更加致密,强度更高,膨胀性能更好。

关键词: 白色硅酸盐水泥, 高贝利特硫铝酸盐水泥, 改性, 复合胶凝体系, 水化过程

Abstract: White Portland cement (white cement) has good whiteness and it is a cementing material with decorative effects. Aiming at the problems of long setting time, slow early strength development and large shrinkage deformation of this kind of cement, the high belite sulphoaluminate cement was used to modify the white cement. The effect of high belite sulphoaluminate cement mixed with 10% to 30% (mass fraction) on the setting time, mortar strength and free expansion rate of white cement was systematically studied. Hydration microcalorimeter, XRD, TGA, SEM, and other methods were used to analyze the hydration process, hydration products and microscopic morphology of the composite cementitious system. The results show that high belite sulphoaluminate cement increases the hydration heat release rate of white cement, and significantly shortens the setting time of white cement. The modified white cement hydration product generates a large amount of AFt, which grows interspersedly in the C-S-H gel, consuming part of the Ca(OH)₂, making the structure more compact, strength higher, and expansion performance better.

Key words: white Portland cement, high belite sulphoaluminate cement, modification, composite cementitious system, hydration process

中图分类号:

TQ172

兰明章, 王浩, 陈智丰, 葛仲熙, 王剑锋, 裴天蕊. 高贝利特硫铝酸盐水泥改性白水泥的物理力学性能与水化作用[J]. 硅酸盐通报, 2021, 40(10): 3345-3351.

LAN Mingzhang, WANG Hao, CHEN Zhifeng, GE Zhongxi, WANG Jianfeng, PEI Tianrui. Physical and Mechanical Properties and Hydration of High Belite Sulphoaluminate Cement Modified White Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(10): 3345-3351.

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