昂 源1,王万金1,孔 韬1, 2,刘俊元1,贺 奎1,夏义兵1,王子明2
昂源,王万金,孔韬,等.聚羧酸分子结构对新拌免压蒸管桩混凝土的影响[J].混凝土与水泥制品,2017(10):43-47.
ANG Y, WANG W J, KONG T,et al.Effects of Molecular Structure of Polycarboxylate on Fresh Non-steam Autoclaved Pile Concrete[J].China Concrete and Cement Products,2017(10):43-47.
聚羧酸分子结构对新拌免压蒸管桩混凝土的影响
昂 源1,王万金1,孔 韬1, 2,刘俊元1,贺 奎1,夏义兵1,王子明2
昂源,王万金,孔韬,等.聚羧酸分子结构对新拌免压蒸管桩混凝土的影响[J].混凝土与水泥制品,2017(10):43-47.
ANG Y, WANG W J, KONG T,et al.Effects of Molecular Structure of Polycarboxylate on Fresh Non-steam Autoclaved Pile Concrete[J].China Concrete and Cement Products,2017(10):43-47.
摘 要:研究了聚羧酸减水剂分子结构中几个因素,包括PEO接枝密度、侧链长短、减水剂分子量大小以及小分子单体的引入等,对新拌免压蒸PHC管桩混凝土的静浆流动度、减水剂分散时间以及蒸养强度的影响。结果表明,较低的PEO接枝密度、较长的侧链、适中的链转移剂掺量以及较低的AMPS掺量将提高减水剂的减水率;较低的PEO接枝密度、较短的侧链、较高的链转移剂掺量以及较低的AMPS掺量将缩短减水剂的分散时间;较高的PEO接枝密度、较长的侧链、较低的链转移剂掺量以及更多的AMPS掺量将提高免压蒸PHC管桩混凝土的蒸养强度。
Abstract: The influence of several factors including PEO side chain density, PEO side chain length, dosage of THA and AMPS on the polycarboxylate superplasticizeron fresh non-steam autoclaved PHC concrete are investigated through themini slump loss, dispersion time of water reducer and steam curing strength. The results showed that the lower PEO side chain density, longer PEO side chain and medium THA dosage and lower dosage of AMPS will reduce the water reducing rate. Dispersion time of water reducer will be shortened with lower PEO side chain density, shorter PEO side chain, higher dosage of THA and lower content of AMPS. Higher PEO side chain density, longer PEO side chain, lower THA dosage and more AMPS will increase the curing strength of non-steam autoclaved PHC concrete curing strength.
版权所有:中国混凝土与水泥制品网 苏ICP备10086386号 网站建设:中企动力 苏州