紫外预处理对硅酸盐水泥浆体早期碳化性能的影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (3): 786-792.

所属专题：水泥混凝土

紫外预处理对硅酸盐水泥浆体早期碳化性能的影响

施晓晨^1,2, 水中和^1,3, 李浩源³, 肖勋光¹, 孙涛^1,3, 王雷冲¹

1.中山市武汉理工大学先进工程技术研究院,中山 528437;
2.武汉理工大学资源与环境学院,武汉 430070;
3.武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070

收稿日期:2022-10-19 修订日期:2022-12-05 出版日期:2023-03-15 发布日期:2023-03-31
通信作者: 水中和,博士,教授。E-mail:zhshui@whut.edu.cn
作者简介:施晓晨 (1993—),女,博士。主要从事绿色建筑材料的研究。E-mail:1144682606@qq.com
基金资助:
广东省中山市科技创新领军人才项目(LI2021002)

Effect of Ultraviolet Pretreatment on Early Carbonation Properties of Portland Cement Paste

SHI Xiaochen^1,2, SHUI Zhonghe^1,3, LI Haoyuan³, XIAO Xunguang¹, SUN Tao^1,3, WANG Leichong¹

1. Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City, Zhongshan 528437, China;
2. School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China;
3. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

Received:2022-10-19 Revised:2022-12-05 Online:2023-03-15 Published:2023-03-31

摘要/Abstract

摘要： 预处理是碳化养护制度中的关键步骤,对水泥浆体碳化非常关键。在本文中,通过紫外线照射的方式对拟碳化养护的水泥试件进行预处理,并与标养预处理对比,测试并分析了硅酸盐水泥浆体的碳化深度、抗压强度、CO₂吸收量及水化产物结构形态变化。结果表明,在相同时间内,水泥试件经过紫外预处理后的质量损失是标养预处理的5.3倍,而在加速碳化后其碳化深度较标养预处理提高了2.4倍,碳化反应后其质量增加4.5倍,早期强度提高了18.9%,CO₂吸收量提高了0.25%。紫外预处理增加了碳化水泥试件高聚合度硅胶(Q³+Q⁴)的含量。因此,紫外预处理可明显加快试件失水和脱钙进程,对水泥试件碳化过程具有显著的增强作用。

关键词: 硅酸盐水泥, 二氧化碳养护, 紫外预处理, 标养预处理, 碳化深度, 抗压强度

Abstract: Pretreatment is the key step in carbon curing system, which is very important for cement paste carbonization. In this study, the cement specimens before carbonation were pretreated by ultraviolet (UV) irradiation and compared with standard pretreatment, and the carbonation depth, compressive strength, CO₂ absorption and structural morphological changes of hydration products were tested and analyzed. The results show that the mass loss of cement specimens after UV pretreatment is 5.3 times as standard curing pretreatment. After accelerated carbonization, the carbonization depth increases by 2.4 times, the mass increases by 4.5 times, the early compressive strength increases by 18.9%, and the CO₂ absorption increases by 0.25%. It is found that UV pretreatment increases the formation of silica gel (Q³+Q⁴) content with high degree of polymerization of carbonized cement specimens. Therefore, UV pretreatment can significantly accelerate the water loss and decalcification of the specimen, which has a significant enhancement effect on the carbonization process of cement specimens.

Key words: Portland cement, CO₂ curing, UV pretreatment, standard curing pretreatment, carbonization depth, compressive strength

中图分类号:

TU502

施晓晨, 水中和, 李浩源, 肖勋光, 孙涛, 王雷冲. 紫外预处理对硅酸盐水泥浆体早期碳化性能的影响[J]. 硅酸盐通报, 2023, 42(3): 786-792.

SHI Xiaochen, SHUI Zhonghe, LI Haoyuan, XIAO Xunguang, SUN Tao, WANG Leichong. Effect of Ultraviolet Pretreatment on Early Carbonation Properties of Portland Cement Paste[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(3): 786-792.

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紫外预处理对硅酸盐水泥浆体早期碳化性能的影响

Effect of Ultraviolet Pretreatment on Early Carbonation Properties of Portland Cement Paste

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