纤维和膨胀剂复掺自密实混凝土的制备及工程应用  

PREPARATION AND ENGINEERING APPLICATION OF SELF-COMPACTION CONCRETE WITH FIBER AND EXPANSIVE AGENT COMPOUND ADMIXTURE

作　　者：李进[1] 杨杰[1] 童金虎[2] 柏经纬 耿飞[1] 

机构地区：[1]南京航空航天大学土木工程系,南京210016 [2]东南大学建筑设计研究院有限公司,南京210096 [3]浙江大东吴集团建设有限公司,浙江湖州313000

出　　处：《建筑技术》2017年第1期51-54,共4页Architecture Technology

基　　金：国家"十二五"科技支撑计划(2015BAL02B02);江苏重点研发项目(BE2015349)

摘　　要：针对钢-混凝土混合梁结合段受力复杂、设计要求高且不易施工的特点,配制C60纤维增韧自密实微膨胀混凝土,测试分析了膨胀剂、减水剂与纤维对其工作性能的影响。结果表明,掺入膨胀剂后浆体的流动度经时损失有所增加;与普通型相比,保坍缓释型聚羧酸减水剂显著改善了流动度损失的问题;拌合物的自密实性能随钢纤维掺量的提高逐渐下降,微细短切钢纤维造成的影响小于普通长纤维,其适宜掺量为30 kg/m3。In this paper, relaying on the difficult construction of steel-concrete combined complex stress condition, high design requirement and sections, the expanding agent, water reducing admixture and fiber on C60 fiber reinforced self-compacting concrete＇s working performance were studied. The results show that the slump loss of paste mixing expansive agent is increased; ZWL-II can effectively solve the problem of the slump loss, better than ZWL-I; self-compacting concrete＇s working performance decreases gradually with the increase of steel fiber content, and the influence on its working performance by SF-W is less than that by SF-P, and the suitable dosage is about 30kg/m3.

关 键 词：纤维 膨胀剂 自密实混凝土 钢-混凝土混合梁结构 

分 类 号：TU745.3[建筑科学—建筑技术科学]