气密性混凝土的气密性测试方法及其影响因素综述

Overview of Airtightness Testing Methods and Influencing Factors for Airtight Concrete

气密性混凝土是指在混凝土施工中渗入一定量的气密剂以改善其气密性能的混凝土,具有密实性高、抗裂防渗性好,能够补偿混凝土收缩,增强混凝土防水抗渗效果等优点,近年来已成为国内外的研究热点。目前,学界对气密性混凝土气密性测试方法及其影响因素的研究较少,本文深入探讨了当前测试气密性混凝土性能的主要方法,包括压力变化法和气体渗透法,并对影响混凝土气密性的关键因素——水胶比、矿物掺合料、砂率和气密剂进行了详细分析,以期为气密性混凝土的气密性能评价提供理论参考,也为在相关研究和工程项目中进一步推广应用气密性混凝土提供重要参考。

Airtight concrete refers to concrete that is infiltrated with a certain amount of airtightness agent during concrete construction to improve its airtightness performance.It has the advantages of high compactness,good crack,and seepage resistance,can compensate for concrete shrinkage,and enhances the waterproof and impermeable effect of concrete.In recent years,airtight concrete has become a research hotspot at home and abroad.At present,there is relatively little research in the academic community on the test methods and inf luencing factors of the airtightness of airtight concrete.Therefore,this article delves into the main methods for testing the performance of airtight concrete,including the pressure change method and gas permeability method,and provides a detailed analysis of the key factors affecting the airtightness of concrete-water cement ratio,mineral admixtures,sand ratio,and airtightness agent.The aim is to provide theoretical references for the evaluation of the airtightness performance of airtight concrete and also provides important reference for further promoting the application of airtight concrete in related research and engineering projects.