Experimental Evaluation of Bond Strength between Setting Retarder Added Concrete and Normal Concrete

Table 1

Mix proportion.

Types	Unit weight (kg/m^3)
	New concrete	164	276	898	867	59	59	2.76	0
Old concrete	3.94

, water; , cement; , coarse aggregate; , sand; , blast furnace slag; , fly ash; superplasticizer; , setting retarder.