高性能胶凝体系收缩性能的试验研究  

Research on the shrinkage of high performance mortar

作　　者：尚建丽[1] 杨利民[1] 杨晓东[1] 

机构地区：[1]西安建筑科技大学材料学院,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2006年第5期691-693,共3页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

摘　　要：利用双掺粉煤灰和高效减水剂技术,试验研究了低水胶比高性能胶凝体系的收缩性能。结果表明:萘系高效减水剂对胶砂试样早期收缩有一定影响,但28d龄期时的收缩值增大了20%—40%;水养护时间对胶砂的收缩变形有明显的影响;掺加有粉煤灰和高效减水剂的低水胶比胶砂,在养护充分的条件下,水胶比小,胶砂的收缩值相对较大.The shrinkage of high performance mortar with low water/binder ratio was investigated by adding fly ash and superplasticiser. The results showed that the early age shrinkage of low water/binder ratio mortar was decreased by adding superplasticiser, but its 28-day shrinkage was increased by about 20% ～40%. And the wet curing time had significant effects on the early age shrinkage of mortar. As for the mortar with low water/binder ratio, with fly ash and superplasticiser added, its shrinkage increases with the decrease of water/binder ratio under the same wet curing condition.

关 键 词：胶砂 收缩 高效减水剂 水养护 水胶比 

分 类 号：TU528.2[建筑科学—建筑技术科学]