粉煤灰粉磨前后制备混凝土的碳化行为对比  

Carbonation resistance of concrete containing ground fly ash

作　　者：马军涛 李超 段爱萍 陈爱玖 MA Juntao;LI Chao;DUAN Aiping;CHEN Aijiu(Henan Tongli Cement Incorporated Co.,Ltd.,Zhengzhou 450008,China;School of Civil Engineering and Communication,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;Henan Building Materials Research and Design Institute Co.,Ltd.,Zhengzhou 450002,China)

机构地区：[1]河南同力水泥股份有限公司,河南郑州450008 [2]华北水利水电大学土木与交通学院,河南郑州450045 [3]河南建筑材料研究设计院有限责任公司,河南郑州450002

出　　处：《混凝土》2020年第3期73-76,共4页Concrete

基　　金：国家自然科学基金:无机超分子材料抑制混凝土硫酸盐侵蚀反应的基础研究(51508191);水利部堤防与病害防治工程技术研究中心开放基金项目:磨细粉煤灰制备高抗渗混凝土试验研究。

摘　　要：磨细粉煤灰具有较大的比表面积和良好的火山灰活性,掺入水泥混凝土中能有效改善水泥混凝土内部密实度,从而提高水泥混凝土的抗碳化性能。试验使用碳化深度法和碳酸钙含量测试法对粉磨前后粉煤灰制备混凝土的抗碳化性能进行了研究,并对其进行了对比分析。研究结果表明:相比于掺加未粉磨粉煤灰的混凝土,磨细粉煤灰制备的混凝土抗压强度和抗碳化性能均有明显提高,当粉煤灰掺量为20%时,混凝土的7 d碳化深度下降了30%左右。Based on the high specific surface area and the pozzolanic activity,ground fly ash is now used in concrete to improve the internal density and enhance the carbonation resistance.Carbonation depth method and CaCO3 content test method are both used to study and compare the carbonation behavior of concrete containing ground fly ash.The results show that,compared to concrete containing raw fly ash,the compressive strength and carbonation resistance of concrete containing ground fly ash are much higher.When the addition of fly ash is 20%,the 7 d carbonation depth of concrete containing ground fly ash is 30%lower than concrete containing raw fly ash.

关 键 词：磨细粉煤灰 抗压强度 碳化 碳酸钙含量 

分 类 号：TU528.041[建筑科学—建筑技术科学]