CRTSⅠ型水泥乳化沥青砂浆流变性能  

Rheological Properties of CRTS Ⅰ Cement Asphalt Emulsified Mortar

作　　者：王涛[1] 贾恒琼[1] 李洪刚[1] 

机构地区：[1]中国铁道科学研究院金属及化学研究所,北京10081

出　　处：《土木工程与管理学报》2018年第1期48-53,共6页Journal of Civil Engineering and Management

基　　金：国家自然科学基金(51408610)

摘　　要：用Brookfield RS-SST型流变仪研究了新拌CA砂浆的流变特性,并结合含气量和流动度进行了分析,结果表明,CA砂浆粘度随剪切速率增加而降低,后趋稳定,速率降低时粘度逐渐上升,粘度–速率曲线下降段略高于上升段;最高剪切速率为100与150 s-1时,CA砂浆应力–速率全曲线两者下降段近似直线,但两者上升段趋势略有不同,150 s-1曲线上升段在90~115 s-1间存在剪切应力稳定的水平段;增加CA砂浆含气量并不能显著增加其粘度和粘度比值触变指数,含气量越高,其触变性相对较大;150 s-1滞回环面积与粘度比值触变指数的线相关性较好,系数均在0.92以上,适宜表征CA砂浆的触变性。The rheological properties of fresh cement asphalt emulsified mortar(CA mortar) were studied by Brookfield RS-SST rheometer,and analyzed combined with air content and fluidity. The results show that the viscosity of CA mortar decreased with the shear rate increasing,and trend stability,viscosity increased gradually with shear rate decline. The descent segment of viscosity-shear rate curve is slightly higher than the rise segment; when the Maximum shear rate is 100 or 150 s-1,the decline curve is approximate straight line,but the rising trends are slightly different. There is horizontal phase in rise segment of the 150 s-1 curve during shear rate 90 ~ 115 s-1,which means shear stress stability; when air content of CA mortar increase,initial viscosity and thixotropy index for viscosity ratio indistinctively increase,the higher the air content is,and thixotropy is relatively greater; the loop area of 150 s-1 curve is more suitable for indicating the thixotropic of CA mortar,which shows a good linear dependence on other thixotropic index for viscosity ratio,and correlation coefficient is over 0.92.

关 键 词：CA砂浆 流变性能 粘度 触变性 

分 类 号：TU528.42[建筑科学—建筑技术科学]