东非地区大吸水率骨料混凝土改善技术研究  

Research on the improvement of high water absorption aggregate concrete in East Africa

作　　者：瞿东明 李康[2,3] 夏京亮[2] 周永祥[2] 王永海[2] 

机构地区：[1]中交第二公路工程局有限公司海外事业部,陕西西安710065 [2]中国建筑科学研究院,北京100013 [3]北京科技大学,北京100083

出　　处：《新型建筑材料》2017年第4期91-94,115,共5页New Building Materials

摘　　要：通过掺入易流型复合掺合料来改善东非地区大吸水率骨料对混凝土造成的工作性能差、长期性能和耐久性能严重不足的问题。结果表明:易流型复合掺合料与粉煤灰按7∶3比例等量取代35%水泥时,大吸水率骨料混凝土流动性、密实性、抗冻性、抗收缩性能等均得以显著改善;易流型复合掺合料与粉煤灰按5∶5比例等量取代35%水泥时,大吸水率骨料混凝土上述性能与普通骨料混凝土相当,完全能够满足现场施工条件及100年服役寿命要求。Incorporating easy flow pattern compound mineral admixtures to improve the poor workability, insufficient long-term performance and durability of concrete made of the high water absorption aggregate in East Africa. Results show that：when the replacement of easy flow pattern compound mineral admixtures and fly ash substitute equivalently cement is up to 35% with ratio of 7：3, the mobility,compactness,freeze-thaw resistance and anti-shrlnkage performance and so on all are significantly improved： when easy flow pattern compound mineral admixtures and fly ash substitute equivalently cement is up to 35% with ratio of 5：5,above performance of concrete made of the high water absorption aggregate is equivalent to that of normal aggregate concrete,which can fully satisfy the site construction condition and 100 year service life requirements.

关 键 词：大吸水率骨料 易流型复合掺合料 工作性能 长期耐久性能 

分 类 号：TU528[建筑科学—建筑技术科学]