沈阳工业大学学报2011，Vol.33Issue(5)：576-581,6.
石灰石粉和粉煤灰对混凝土抗冻融性能的影响
Influence of limestone powder and fly ash on freezing-thawing resistance of concrete
摘要
Abstract
In order to obtain the comprehensive understanding for the influence of limestone powder and fly ash on the freezing-thawing resistance of concrete as well as enhance the application technology level of concrete,the influence of limestone powder fineness on the freezing-thawing resistance of concrete and the modification effect of fly ash were studied based on both evaporable water content and rapid freezing methods combining with scanning electron microscope（SEM） micro-analysis.The experimental results indicate that limestone powder respectively with specific surface area of 382,627 and 883m2/kg has little effect on the freezing-thawing resistance of concrete,and its freezing-thawing resistance is lower than that of ordinary concrete.The freezing-thawing resistance of limestone powder concrete gets remarkably improved by fly ash with mixing content of 10%,and is close to that of ordinary concrete.In addition,the complementary effect exhibits as the early enhancement of limestone powder and the later activity of fly ash.When the mixing content of fly ash continuously increases,the improvement effect of limestone powder on the freezing-thawing resistance of concrete deteriorates sharply,and the freezing-thawing resistance is lower than that of concrete only mixed with 10% limestone powder.关键词
石灰石粉/粉煤灰/孔隙率/抗冻融性能/细度/活性效应/相对动弹性模量/质量损失率Key words
limestone powder/fly ash/porosity/freezing-thawing resistance/fineness/activity effect/relative dynamic elastic modulus/mass loss分类
建筑与水利引用本文复制引用
何智海,钱春香,刘运华,高桂波,袁航..石灰石粉和粉煤灰对混凝土抗冻融性能的影响[J].沈阳工业大学学报,2011,33(5):576-581,6.基金项目
国家重点基础研究发展计划资助项目 （）
