However, due to pumping, changes in fresh concrete properties and the air-void system have been noticed.This paper describes the consequences of pumping on the fresh properties of SCC by means of two experimental pumping campaigns.This paper presents the development of a rheological model for self-consolidating concrete (SCC).The developed model is based on the paste rheology criteria, which include minimum apparent viscosity, minimum flow, and optimum flow-viscosity ratio to achieve self-consolidating concrete with satisfactory segregation resistance and deformability.
The properties of SCC were characterized by quantitative measures of segregation and flow. American Association of State Highway and Transportation Officials (AASHTO). âEvaluation of the Bond Strength of Self-Compacting Concrete in Pull-Out Tests.â Proceedings of Second North American Conference on the Design and Use of Self-Consolidating Concrete and Fourth International RILEM Symposium on Self-Compacting Concrete, Chicago, 953â8. 5th edition with 2014 interim revisions, Washington, D. American Association of State Highway and Transportation Officials (AASHTO). The changes in yield stress or slump flow are anticipated to be influenced by the same phenomenon, but the final outcome is assumed to depend on the availability of residual superplasticizer in the mixing water.Pumping can cause a stable SCC to become segregating if both the yield stress and plastic viscosity decrease, or it can provoke a significant loss in filling ability, passing ability and self-consolidation of the concrete if the yield stress increases dramatically.