生物胶对引气水泥砂浆流变性能的影响  

Effects of biopolymers on rheological properties of air entraining cement mortar

作　　者：任崴峣 柯国炬[1] 田波[1] 何晓雁[2] 

机构地区：[1]交通运输部公路科学研究所,北京100088 [2]内蒙古工业大学土木工程学院,内蒙古呼和浩特010051

出　　处：《混凝土》2015年第4期134-136,143,共4页Concrete

基　　金：国家自然科学基金(51308264);交通运输部公路科学研究所基本科研业务费(2014-9002)

摘　　要：采用砂浆扭矩转速测试仪研究了生物胶对四种引气水泥砂浆流变性、流动度和含气量的影响。结果表明,掺生物胶的引气水泥砂浆可视为宾汉姆体。在特定的范围内,A引气砂浆的塑性黏度随生物胶掺量的增大先减小后增大,而B、C、D型砂浆的塑性黏度几乎不变。四种引气砂浆的屈服应力值均随生物胶掺量的增大而增大。引气水泥砂浆的流动度与生物胶掺量之间存在很好的负相关性。引气稳泡性能和砂浆黏度共同作用决定引气水泥砂浆的含气量。A和D引气砂浆的含气量随生物胶掺量的增大呈现先增大后减小的变化趋势,B和C引气砂浆的含气量随生物胶掺量的增大而减小。The effects of biopolymers on rheological properties,fluidity and air content of air entraining cement mortar were studied by means of mortar torque speed tester. Results showthat air entraining cement mortar with biopolymers can be regarded as Bingham model. Within a certain range of biopolymers content,plastic viscosity of A mortar rised first and then decreased,while plastic viscosity of B,C,D mortar almost did not change. The yield stress of four kinds of mortar increased with the improvement of biopolymers dosage.There is a high inverse correlation between biopolymers dosage and fluidity of air entraining cement mortar. Air content was determined by air entraining properties,keep bubble properties and viscosity of mortar. The air content of A and D mortar increased first and then decreased,while air content of B and C mortar decreased with the improvement of biopolymers dosage.

关 键 词：生物胶 引气水泥砂浆 流变性 流动度 含气量 

分 类 号：TU528.041[建筑科学—建筑技术科学]