Effect of stone dust and MB value for manufactured sand on workability of self-compacting concrete and model analysis

The influence of stone dust content and Methylene blue (MB) of manufactured sand, the binder content on workability of self-compacting concrete were investigated. Self-compacting concrete viscosity relational model was built with Design-Expert7.0 software. The results indicated that MB and stone dust content of manufactured sand were important indexes for the workability of self-compacting concrete prepared by manufactured sand. While MB<1, stone dust in manufactured sand will help to improve workability of self-compacting concrete, but the content should be less than 15%; while MB >= 1, the workability off self-compacting concrete was sensitive to the change of stone dust content and the content must be less than 5%.