石灰石粉作摻合料對混凝土工作性能的影響

編號：JCHY00023

篇名：石灰石粉作摻合料對混凝土工作性能的影響

作者：馬燁紅; 吳笑梅; 樊粵明;

關(guān)鍵詞：石灰石粉; 摻合料; 工作性能; 混凝土;

機構(gòu)： 華南理工大學(xué)材料學(xué)院; 華南理工大學(xué)材料學(xué)院 廣東廣州; 廣東廣州; 華南理工大學(xué)特種功能材料及制備技術(shù)教育部重點試驗室;

摘要： 通過Marsh筒[1]、膠砂流動度及實測混凝土和易性等方法,研究了石灰石粉作摻合料對混凝土工作性能的影響,并與粉煤灰的效果相對比。試驗結(jié)果表明:一定顆粒分布的石灰石粉能改善新拌混凝土的流動性能,減少泌水率及縮短凝結(jié)時間。 The influence of limestone powder admixture on working performance of concrete is discussed,which is evaluated by Marsh cone[1],fluidity of cement mortar and workability of concrete mixed.Simultaneously,this study also contrasts the working performance of concrete containing limestone powder admixture as well as fly ash.It is shown that the limestone powder with appropriate particle distribution can improve the fluidity of concrete,reduce bleeding rate and shorten the setting time.