织物增强混凝土永久模板叠合试件抗氯离子渗透性能研究  

Experimental study on resistance to chloride ion permeability of textile reinforced concrete permanent formwork composite specimen

作　　者：陈欣[1,2] 王国杰 林颖[3] CHEN Xin l;WANG Guojie;LIN Ying(College of Engineering,Fujian Jiangxia University,Fuzhou 350108,China;Coordinative Innovation Center for Environmentally Friendly and Energy Saving HPC,Fuzhou 350108,China;College of Civil Engineering,Fuzhou University,Fuzhou 350116,China)

机构地区：[1]福建江夏学院工程学院,福建福州350108 [2]福建省环保节能型高性能混凝土协同创新中心,福建福州350108 [3]福州大学土木工程学院,福建福州350116

出　　处：《混凝土》2024年第8期158-162,共5页Concrete

基　　金：国家自然科学基金海峡联合基金重点项目(U1605242);福建省自然科学基金(2021J011234);福建江夏学院科技类项目(JXZ2018011)

摘　　要：织物增强混凝土(TRC)由高性能细骨料混凝土基体与纤维网组成,TRC永久模板与核心混凝土组成叠合试件。为揭示叠合试件氯离子渗透作用规律,确定永久模板最佳厚度范围,以TRC永久厚度、耐碱纤维网层数以及界面处理方式为变量,进行叠合试件抗氯离子渗透性能试验研究和计算分析。结果表明:与未设置永久模板相比,当TRC永久模板厚度为10~50 mm时,叠合试件氯离子扩散系数分别降低73.2%~95.6%。耐碱纤维编网对永久模板抗氯离子渗透性能没有增强作用。水泥净浆涂刷、表面凿毛、短切纤维插入三种界面处理方式对叠合试件氯离子渗透系数和渗透深度的影响不显著。结合Duracrete模型定量分析,给出了海洋环境不同工况下TRC永久模板厚度建议范围。Textile reinforced concrete(TRC)is a composite material composed of high performance fine aggregate concrete and fiber textile.TRC permanent formwork and core concrete constitute composite specimen.In order to reveal the chloride ion permeability of composite specimens and determine the permanent formwork thickness range,experimental research and calculation analysis were carried out on the chloride ion permeability resistance of TRC permanent formwork composite specimens.Experiment variables were TRC permanent thickness,the layer numbers of alkali-resistant fiber mesh and interface treatment methods.The results show that compared with no permanent formwork,when the thickness of TRC permanent formwork are from 10 mm to 50 mm,the chloride diffusion coefficient of the composite specimens decrease from 73.2%to 95.6%respectively.The alkali-resistant fiber mesh has no enhancement effect on the chloride ion permeability resistance of permanent formwork.The three interface treatment methods of cement paste brushing,surface chiseling and chopped fiber insertion have little effect on the chloride ion permeability of the composite specimens.According to the experiment results,the recommended thickness range of TRC permanent formwork in the different marine environment are given through quantitative calculation with reference to the Duracrete model.

关 键 词：永久模板 叠合试件 氯离子扩散系数 模板厚度 

分 类 号：TU528.7[建筑科学—建筑技术科学]