Study on the Impact of Aggregate Size to SCC Segregation
There are many factors affecting segregation of self-compacting concrete, and one of major factors is aggregate size. Based on the application of Stokes law to analyze aggregate segregation, ball-drop paste viscosity measurement has been used in the research that segregation degree of aggregate of various particle size in paste of identical paste consistency and the relationship between aggregate size and paste viscosity when concrete mixture reach the same fluidity in this article. It shows that aggregate segregation rapidly grows up with the increase of aggregate size and in order to reduce aggregate segregation, paste viscosity should be increased correspondingly under identical fluidity; as the aggregate size comes up to a certain degree, the growth of paste viscosity speeds up obviously, for the sake of maintaining the fluidity, paste should be increased; there is a sudden change in the growth course curve that paste viscosity increases with the aggregate, from the perspective of aggregate segregation, the part before the change has been approved to be a reasonable size range of the aggregate.
Chaohe Chen, Yong Huang and Guangfan Li
L. Zeng et al., "Study on the Impact of Aggregate Size to SCC Segregation", Advanced Materials Research, Vols. 243-249, pp. 6984-6989, 2011