摘要
研究了不同长度及掺量的聚丙烯纤维对碱矿渣水泥砂浆性能的影响。结果表明：6mm 和12mm 聚丙烯纤维掺量为0.04%~0.16%时，能提高碱矿渣水泥砂浆的流动度，改善碱矿渣砂浆的工作性，但随着纤维掺量的增加，流动度增加幅度减小。掺入6mm 聚丙烯纤维0.12%时，砂浆的早、后期抗压强度都有所降低，但28d 抗折强度提高25.5%，折压比提高33.3%；当掺入12mm 聚丙烯纤维0.12%时，28d 抗压、抗折强度分别增加11.8%和30.6%，且28d折压比提高25%。相比而言，在同等掺量时，掺入12mm 的聚丙烯纤维对碱矿渣水泥砂浆抗压、抗折强度的贡献优于掺入6mm 的聚丙烯纤维。
The effects of polypropylene fiber under different length and different admixture content on the properties of alkali-activated slag cement mortar are studied. The results show that when the polypropylene fiber contents with 6mm and 12mm length are 0.04%~0.16%, workability of alkali-activated slag cement mortar is improved, but with the increas-ing of fiber content, the fluidity increasing extent decreases. When the content of the polypropylene fibers with 6mm length is 0.12%, the compressive strengths of the mortar at the earlier and later stages decrease, but their 28d flexural strengths increase by 25.5% and the ratio of flexural and compressive strength increase by 33.3% as well. When the con-tent of the polypropylene fiber with 12mm length is 0.12%, the 28d compressive strength and flexural strength increase by 11.8% and 30.6% respectively and its 28d ratio of flexural and compressive strength also increases by 25%. By compari-son, under the same admixture content, the polypropylene fibers with 12mm length have a bigger contribution to the com-pressive strength and the flexural strength of the alkali-activated cement slag mortar than those of polypropylene fibers with 6mm length.
出处
《混凝土与水泥制品》
北大核心
2014年第11期60-63,共4页
China Concrete and Cement Products
基金
重庆交通大学交通土建工程材料国家地方联合工程实验室开放基金项目(LHSYS-2012-004)
关键词
聚丙烯纤维
掺量
纤维长度
碱矿渣水泥砂浆
力学性能
Polypropylene fiber
Amount
Length of fiber
Alkali-activated slag mortars
Mechanical properties
