| Title |
A Study on Rheological Properties and Rational Fluidity Evaluation of Cementitious Matrices for High Strength Concrete |
| Authors |
Lee, Gun-Cheol ; Cho, Byoung-Young ; Oh, Dong-Uk |
| Keywords |
High Strength Concrete ; Cementitious Matrices ; Rheological Properties ; Fluidity Evaluation |
| Abstract |
In this study, both rheological aspect for fluidity and correlation for fluidity evaluation methods of cement paste and mortar for high strength concrete mix are considered. Effects of the fiber and correlation of fluidity evaluation methods for cement paste and mortar of each mix in four high strength concrete mix of 40∼100 MPa used on the site are reviewed. As a result, cementitious matrix appeared high fluidity, but fluidity in case of adding fiber into plain mix has been decreased because of high viscosity and networking effect of fiber. In addition, the relation of between each fluidity evaluation method and rheological parameters has rather lower interrelationship in case of slump flow, but it showed higher interrelationship with between both 500mm arrival time of L flow test and funneling time and rheology integer. Therefore, in case of high fluidity concrete such as high strength concrete, The physical evaluation including shear-strain rate in addition to fluidity evaluation such as flow is important. |