Research on the Performances of Reactive Powder Concrete with the Assembly Unit of the Waste Fly Ash and the Secondary Aluminum Dross
In this paper,the reactive powder concrete(RPC)is prepared with the assembly unit of secondary aluminum dross(SAD)and incineration waste fly ash(WFA).The influences of the SAD's mass ratio to the total mass of SAD and WFA on the rheological parameters(the slump flow and the plastic viscosity),the flexural strength and the compressive strength are investigated.The immersed heavymetals(Crand Zn)aremeasured.The RPC's microscopic morphology obtained by the scanning electron microscope(SEM)is used to reveal the mechanism of RPC's performances.The researching results display that when the mass ratio of secondary aluminum dross is 60% ,the slump flow,the flexural strength,the compressive strength and the drying shrinkage rate of RPC are the highest.However,the plastic viscosity of the RPC is the lowest at this moment.The amounts of the leached Cr and Zn are positively correlated with its immersing time and inversely correlated with the amount of the secondary aluminum dross.When the amount of amount of the secondary aluminum dross is 60% ,the microstructure of RPC is the most compact.
secondary aluminum drosswaste fly ashrheological parametersmechanical strengthleached heavy metal
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