保护剂对清水混凝土抗碳化性能的影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (1): 85-91.

所属专题：水泥混凝土

保护剂对清水混凝土抗碳化性能的影响

魏宇¹, 陈庞¹, 张桂林², 戎贤¹, 赵文忠¹

1.河北工业大学,土木与交通学院,天津 300401;
2.国网河北省电力有限公司,石家庄 050000

收稿日期:2022-08-17 修订日期:2022-09-29 出版日期:2023-01-15 发布日期:2023-02-15
通信作者: 陈庞,博士,讲师。E-mail:hitchenpang@126.com
作者简介:魏宇(1996—),男,硕士研究生。主要从事清水混凝土耐久性能方面的研究。E-mail:871512767@qq.com
基金资助:
国家自然科学基金(52108132);河北省自然科学基金(E2021202067);中国建筑一局(集团)有限公司科技发展课题(KJYF-2021-26);河北省高等学校科学技术研究项目(QN2021037);河北省重点研发计划(19275404D)

Effects of Protective Agents on Carbonation Resistance of Fair-Faced Concrete

WEI Yu¹, CHEN Pang¹, ZHANG Guilin², RONG Xian¹, ZHAO Wenzhong¹

1. College of Civil and Transportation, Hebei University of Technology, Tianjin 300401, China;
2. State Grid Hebei Electric Power Co., Ltd., Shijiazhuang 050000, China

Received:2022-08-17 Revised:2022-09-29 Online:2023-01-15 Published:2023-02-15

摘要/Abstract

摘要： 清水混凝土保护剂具有优异的防水性能,极大地提升了清水混凝土建筑的使用寿命。为精确确定清水混凝土保护剂对清水混凝土抗碳化性能的影响,本文研究了水溶性有机硅类渗透型保护剂和丙烯酸类成膜型保护剂对清水混凝土抗碳化性能的影响。结果表明:成膜型保护剂和渗透型保护剂均可有效降低清水混凝土碳化深度,成膜型保护剂降低效果更为显著;涂抹两种类型保护剂试件的碳化深度均随养护龄期的增加而降低,养护龄期和渗透型保护剂独立发挥作用,而养护龄期和成膜型保护剂相互促进,两者作用可进一步降低清水混凝土碳化深度;建立了清水混凝土碳化深度预测模型,该模型考虑了保护剂种类和厚度对清水混凝土抗碳化性能的影响。

关键词: 清水混凝土, 保护剂类型, 保护剂厚度, 碳化深度, 养护龄期, 预测模型

Abstract: Fair-faced concrete protective agent has excellent waterproof performance and excellent environmental protection performance. It can greatly prolong the service time of buildings being built with fair-faced concrete. For drawing the accurate conclusion that protective agents effects on carbonation resistance of fair-faced concrete, the test for the effect was done with permeable water-soluble silicone protective agent and acrylic film forming agent for protection. The test results show that both film forming agent for protection and permeable water-soluble silicone protective agent can effectively reduce the carbonation depth of fair-faced concrete, and the function of film forming agent for protection is better than that of permeable water-soluble silicone protective agent. Both the carbonation depths of test pieces coated with two different types of protective agents decrease along with the increase of curing age. Curing age and permeable protective agent can act separately while curing age and film forming agent for protection can boost each other, and the carbonation depth of fair-faced concrete can be further reduced because of the mutual action between the curing agent and the film forming agent for protection. A prediction model of the carbonation depth of fair-faced concrete was built. The influences of type and thickness of protective agents on carbonation resistance of fair-faced concrete were considered while being built.

Key words: fair-faced concrete, type of protective agent, thickness of protective agent, carbonation depth, curing age, prediction model

中图分类号:

TU528

魏宇, 陈庞, 张桂林, 戎贤, 赵文忠. 保护剂对清水混凝土抗碳化性能的影响[J]. 硅酸盐通报, 2023, 42(1): 85-91.

WEI Yu, CHEN Pang, ZHANG Guilin, RONG Xian, ZHAO Wenzhong. Effects of Protective Agents on Carbonation Resistance of Fair-Faced Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(1): 85-91.

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保护剂对清水混凝土抗碳化性能的影响

Effects of Protective Agents on Carbonation Resistance of Fair-Faced Concrete

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