Effect of Ground Waste Concrete Powder on Cement Properties

الملخص EN

The paste/mortar attached to the recycled aggregate decreases the quality of the aggregate and needs to be stripped.

The stripped paste/mortar is roughly 20% to 50% in waste concrete, but relevant research is very limited.

In this paper, the effects of ground waste concrete (GWC) powder, coming from the attached paste/mortar, on water demand for normal consistency, setting time, fluidity, and compressive strength of cement were analyzed.

The results show that the 20% of GWC powder (by the mass of binder) has little effect on the above properties and can prepare C20 concrete; when the sand made by waste red clay brick (WRB) replaces 20% of river sand, the strength of the concrete is increased by 17% compared with that without WRB sand.