硼酸对硫铝酸盐基复合胶凝材料性能的影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (4): 1166-1173.

所属专题：水泥混凝土

硼酸对硫铝酸盐基复合胶凝材料性能的影响

王洪镇^1,2, 沈昊¹, 曹万智^1,2, 甘季中^1,2, 李文琦¹, 王海瑞¹, 褚文斌¹

1.西北民族大学土木工程学院,兰州 730124;
2.甘肃省新型建材与建筑节能重点实验室,兰州 730030

收稿日期:2022-11-21 修订日期:2023-01-03 出版日期:2023-04-15 发布日期:2023-04-25
通信作者: 沈昊,硕士研究生。E-mail:1169903017@qq.com
作者简介:王洪镇(1967—),男,教授。主要从事新型建筑材料与制品的开发与研究。E-mail:1752463981@qq.com
基金资助:
甘肃省科技计划项目基础研究创新群体(20JR10RA130);甘肃省自然科学基金(21JR1RA194);兰州市科技计划(2021-1-137)

Effect of Boric Acid on Properties of Sulphoaluminate Based Composite Cementitious Materials

WANG Hongzhen^1,2, SHEN Hao¹, CAO Wanzhi^1,2, GAN Jizhong^1,2, LI Wenqi¹, WANG Hairui¹, CHU Wenbin¹

1. College of Civil Engineering, Northwest University of Nationalities, Lanzhou 730124, China;
2. Key Laboratory for Energy Saving of New Building Materials and Buildings in Gansu Province, Lanzhou 730030, China

Received:2022-11-21 Revised:2023-01-03 Online:2023-04-15 Published:2023-04-25

摘要/Abstract

摘要： 本文研究了不同硼酸掺量下的硫铝酸盐基复合胶凝材料的标准稠度用水量和凝结时间及安定性,抗压、抗折强度变化规律,并利用 XRD和SEM测试方法对复合胶凝材料的水化机理进行分析。结果表明:硼酸的掺入不影响胶凝材料的安定性,但使标准稠度用水量增加,且标准稠度用水量与硼酸掺量成反比;硼酸掺量越大,初、终凝时间延长越明显;当硼酸掺量为0.20%(质量分数)时,硫铝酸盐水泥占比高的试验组早期强度提高,且后期强度不倒缩;硼酸可使钙矾石的形态更粗壮。掺加硼酸可使复合材料的干缩率降低,质量变化率呈下降趋势。

关键词: 硼酸, 硫铝酸盐基复合胶凝材料, 基本性能, 后期强度, 水化机理, 安定性

Abstract: In this paper, the standard consistency water consumption, setting time, stability and the change law of compressive and flexural strength of sulfoaluminate based composite cementitious materials with different boric acid amounts were studied, and the hydration mechanism of composite cementitious materials was analyzed by XRD and SEM. The results show that the incorporation of boric acid does not affect the stability of cementitious materials, its standard consistency water consumption increases, and the standard consistency water consumption is inversely proportional to the amount of boric acid. The greater the amount of boric acid is, the more obvious the prolongation of the initial and final setting time is. When the amount of boric acid is 0.20% (mass fraction), the early strength of the test group with a high proportion of sulfoaluminate cement increases, and the late strength can not be inverted shrinkage. Boric acid can make the morphology of AFt stouter. The doping of boric acid can make the dry shrinkage rate decrease and the quality change rate show a decreasing trend.

Key words: boric acid, sulfoaluminate based composite cementitious material, basic performance, late strength, hydration mechanism, stability

中图分类号:

TU502

王洪镇, 沈昊, 曹万智, 甘季中, 李文琦, 王海瑞, 褚文斌. 硼酸对硫铝酸盐基复合胶凝材料性能的影响[J]. 硅酸盐通报, 2023, 42(4): 1166-1173.

WANG Hongzhen, SHEN Hao, CAO Wanzhi, GAN Jizhong, LI Wenqi, WANG Hairui, CHU Wenbin. Effect of Boric Acid on Properties of Sulphoaluminate Based Composite Cementitious Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(4): 1166-1173.

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硼酸对硫铝酸盐基复合胶凝材料性能的影响

Effect of Boric Acid on Properties of Sulphoaluminate Based Composite Cementitious Materials

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