吹风降温法精确测定混凝土渗透性研究  

Research on Accurate Determination of Concrete Permeability by Blow-cooling Operation

作　　者：许凯[1] 田正宏[2,3] 毛龙[2] 梁小勇[1] 

机构地区：[1]中国水利水电第七工程局有限公司,成都610081 [2]河海大学水利水电学院,南京210098 [3]河海大学水文水资源与水利工程科学国家重点实验室,南京210098

出　　处：《中国包装科技博览（混凝土技术）》2013年第1期33-38,共6页China Science and Technology Review

基　　金：水利部公益性行业科研专项经费项目（201101013）：淮河流域涵闸工程安全评估关键技术研究;南水北调工程科技创新（NSBD-SNEZ（F）/KY-01-20-2010）

摘　　要：混凝土结构耐久性能与其表层渗透性密切相关，现场准确快速测定混凝土渗透性是评估其质量不可或缺的重要手段。试验运用Autoclam渗透仪，在室内模拟露天环境，通过采用吹风降温法对混凝土表层进行预处理，提出一种精确量测渗透性指标的量测方法。研究表明，针对室外阳光暴晒测试面工况，通过测前降温预处理措施可以保证Autoclam量测渗透性指标的表征性，现场应用结果初步验证了所提出测试方法的可靠性与实用性。Concrete structure performance is closely related to its surface permeability, and it＇ s of great importance to measure the permeability of surface concrete quickly and accurately on site. In this paper, the blow-cooling operation is put forward and apply to the process to measure concrete permeability utilized the instrument so-called Autoclam System in the simulated conditions in laboratory. Following researches on this revealed that in the case of testing surface suffered strong sunlight exposure the adopted pretreat measures improved the precision of permeability indexes from Autoclam system, and verified the proposed testing method are reliable and practical.

关 键 词：Autoclam 空气渗透性 吸水性 预处理 表征性 

分 类 号：TU375[建筑科学—结构工程]