减水剂对新拌混凝土表观粘度的影响机理  

The influencing mechanism of water-reducing agent on the surface viscosity of fresh concrete

作　　者：卜景龙[1] 傅翠晓[1] 

机构地区：[1]河北理工学院材料系,河北唐山063009

出　　处：《河北理工学院学报》2001年第1期65-68,共4页Journal of Hebei Institute of Technology

摘　　要：分析减水剂对新拌混凝土表观粘度的影响机理 ,指出减水剂是一种表面活性剂 ,它吸附在新拌混凝土的颗粒表面 ,降低颗粒表面自由能 ,增大ξ电位 ,从而增大了新拌混凝土颗粒的分散性 ,降低了表观粘度。另外 ,减水剂的掺入可使水泥颗粒湿润 ,可使水泥颗粒之间的滑动能力增强 ,因此降低了新拌混凝土的表观粘度。The influencing mechanism of Water reducing agent on the appearance viscosity of fresh concrete was analyzed It was stated that Water-reducing Agent is a kind of surfactant,which can absorb the surface fresh concrete pellet.Thus it reduced the surface free-energy and enlarged ξ potential.Subsequently ξ the fresh concrete pellet became much looser.And therefore,the appearance viscosity was reduced.In addition,Water-reducing agent can moist the fresh concrete pellet and enforce the capability of slide between the fresh concrete pellet.So the appeance vescosity of fresh concrete was reduced.

关 键 词：减水剂 新拌混凝土 表面粘度 影响机理 

分 类 号：TU528.042[建筑科学—建筑技术科学]