摘要
Abstract
It is necessary to measure the carbonation depth of concrete surface by rebound method,and the measurement of carbonation depth of concrete surface will be affected in dry environment.In this paper,the rebound test is carried out by setting up oven-drying group,drying group,standard maintenance group,as well as pier A and pier B.It was found that the carbonation boundary of concrete in dry environment appeared obviously when phenolphthalein was sprayed on it,and the carbonation zone turned pink and red with time.The carbonation of fly ash concrete under dry environment is affected by three aspects:first,the proportion of cement clinker decreases,resulting in the decrease of Ca(OH)2;second,the secondary hydration of fly ash consumes Ca(OH)2;third,the dry environment will further affect the hydration reaction and carbonation of cement,resulting in the crystallization of Ca(OH)2.关键词
干燥环境/粉煤灰混凝土/假性碳化/二次水化/水泥熟料占比Key words
dry environment/fly ash concrete/pseudo carbonization/secondary hydration/proportion of cement clinker分类
建筑与水利
