超限游离氧化钙混凝土的体积安定性试验  

Volume Stability Test of Over-Limit Free-CaO Concrete

作　　者：曾家民[1] 曾琦芳[2] 林煌斌[3,4] 

机构地区：[1]华侨大学土木工程学院,福建厦门361021 [2]华侨大学建筑学院,福建厦门361021 [3]同济大学应用力学研究所,上海200092 [4]集美大学工程技术学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2014年第3期336-339,共4页Journal of Huaqiao University(Natural Science)

基　　金：福建省自然科学基金资助项目(2011J01320);中央高校基本科研业务费专项资金;国务院侨办科研基金资助项目(11QZR15);国家公益性行业科研专项(201111020-2)

摘　　要：通过试验条件诱发游离氧化钙(f-CaO)发生反应,以检验混凝土的体积安定.试验结果表明:f-CaO超限是可能引起混凝土体积安定性的影响因素;对芯样进行严格的湿热工艺处理后,芯样线变化率和抗压强度均在允许的范围内,该工程项目不用拆除可继续施工;经过持续13a的观测,未发现由于f-CaO安定性引起的工程质量异常.Under the test conditions, free-CaO reaction was induced, the concrete volume stability was inspectecd. The experimental results show that over-limit free-CaO is the main factor causing the cement volume stability. After the strict heat-moisture treatment for core sample, both the line change rate and compressive strength were within the permitted range. Consequently, the engineering needs not to be demolished, the construction continued as usual, under observation lasting for 13 years, no abnormal structure damage due to f-CaO volume stability has been found.

关 键 词：游离氧化钙 混凝土 体积安定性 结构损伤 材料试验 膨胀应力 

分 类 号：TU984.14[建筑科学—城市规划与设计]