掺加U型膨胀剂、粉煤灰的高性能混凝土试验研究  

Experimental research on high-performance concrete with U-type expansive agent and fly ash

作　　者：马玉平[1] 张志权[1] 王渭涛 

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]陕西省公路局,陕西西安710054

出　　处：《长安大学学报（建筑与环境科学版）》2003年第3期14-17,共4页

摘　　要：对掺加 U型膨胀剂、粉煤灰和高效减水剂的高性能混凝土与基准混凝土进行了对比试验研究 ,得出了这种高性能混凝土的水化热大幅度降低、放热高峰出现时间明显推迟 ,坍落度经时损失减少 ,凝结时间推迟 ,流动性增加 ,粘聚性、保水性好 ,无离析泌水现象 ,抗渗性能有明显的提高 ,干缩率显著降低 ,力学性能有所改善的结论 ,并对此做了一定的理论分析 .Some tests have been studied between the norm concrete and high-performance concrete with U-type expansive agent,fly ash and high-efficient water-reducing agent.By comparison,it happens to this high-performance concrete that the heat quantity of hydration is lower in a large degree,the apex of heat releasing is latter evidently,the losing of slump is fewer,the coagulation is latter,and the fluidness is increased.Therefore,this high-performance concrete that has good viscoplasticity and water retentivity,will not be in isolation,the permeability and drying is reduced,and the mechanics function is improved.Finally,some theories are analyzed.

关 键 词：U型膨胀剂 粉煤灰 高性能混凝土 试验 高效减水剂 

分 类 号：TU528.31[建筑科学—建筑技术科学]