水泥熟料矿物组成对混凝土抗碳化性能的影响  

Influence of mineral composition of cement clinker on carbonization resistance of concrete

作　　者：欧阳克连 吴笑梅[2] 樊粤明[2] OUYANG Kelian(Guangzhou Huali new building Materials Technology Co.LTD.,Guangzhou 526243,Guangdong,China)

机构地区：[1]广州市华力新建材科技有限公司,广东广州526243 [2]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《水泥》2023年第11期1-5,共5页Cement

摘　　要：本文以四种熟料矿物组成不同的P·Ⅱ42.5R水泥、Ⅱ级粉煤灰和石灰石粉为胶凝材料,配制成三个混凝土系统:纯水泥系统A、掺粉煤灰系统B和掺石灰石粉系统C。A系统进行(20±2)℃、相对湿度大于95%的标准养护,B和C进行(15±1)℃、相对湿度(60±5)%的非标准养护。养护28 d后,进行加速碳化试验。试验得出的结果为:在温度(20±2)℃、相对湿度≥95%的标准养护条件下,高C_2S含量的水泥配制成的混凝土试件具有更好的抗碳化性能;在温度(15±1)℃、相对湿度(60±5)%的非标准养护条件下,水化更快的高C_3S含量的水泥配制成的混凝土试件相对而言具有较好的抗碳化性能。提高混凝土抗碳化性能要做好养护工作。The experiment used four kinds of P·Ⅱ42.5R cement that with different clinker mineral composition to prepared three concrete systems,which used fly ash of classⅡand limestone powder as gelled material:an unmixed system A,a mixed fly ash system B and a mixed limestone powder system C.The curing conditions of A are(20±2)℃and RH above 95%and the curing conditions of B and C are(15±1)℃and RH(60%±5%).After the curing(28 d),the accelerated carbonation test was carried out.The results showed that under the standard curing conditions of(20±2)℃and RH above 95%,the concrete prepared by the cement with a high C2S content has a better anti-carbonation performance.Under non-standard curing conditions of(15±1)℃and RH(60%±5%),the concrete prepared by the cement with a high C3S content has a better anti-carbonation performance.A well curing condition is important to improve the anti-carbonation performance of concrete.

关 键 词：抗碳化性能 熟料矿物组成 石灰石粉 

分 类 号：TQ172.1[化学工程—水泥工业] TU528.04[化学工程—硅酸盐工业]