Experimental and Analytical Investigation of Fracture Characteristics of Steel Fiber-Reinforced Recycled Aggregate Concrete

International Journal of Concrete Structures and Materials

Table 1 Concrete mix proportions (kg/m³)

Group	Specimen ID	Recycled aggregate (RA)	Natural aggregate (CA)	OPC	Sand	Water	Admixture	(SFs)
G1	NC-SF0.5	0	1300	360	650	150	20	39.25
	RC10-SF0.5	130	1170	360	650	150	20	39.25
	RC20-SF0.5	260	1040	360	650	150	20	39.25
	RC30-SF0.5	390	910	360	650	150	20	39.25
	RC40-SF0.5	520	780	360	650	150	20	39.25
	RC50-SF0.5	650	650	360	650	150	20	39.25
	RC60-SF0.5	780	520	360	650	150	20	39.25
	RC70-SF0.5	910	390	360	650	150	20	39.25
	RC80-SF0.5	1040	260	360	650	150	20	39.25
	RC90-SF0.5	1170	130	360	650	150	20	39.25
	RC100-SF0.5	1300	0	360	650	150	20	39.25
G2	NC-SF1.0	0	1300	360	650	150	20	78.5
	RC10-SF1.0	130	1170	360	650	150	20	78.5
	RC20-SF1.0	260	1040	360	650	150	20	78.5
	RC30-SF1.0	390	910	360	650	150	20	78.5
	RC40-SF1.0	520	780	360	650	150	20	78.5
	RC50-SF1.0	650	650	360	650	150	20	78.5
	RC60-SF1.0	780	520	360	650	150	20	78.5
	RC70-SF1.0	910	390	360	650	150	20	78.5
	RC80-SF1.0	1040	260	360	650	150	20	78.5
	RC90-SF1.0	1170	130	360	650	150	20	78.5
	RC100-SF1.0	1300	0	360	650	150	20	78.5
G3	NC-SF1.5	0	1300	360	650	150	20	117.75
	RC10-SF1.5	130	1170	360	650	150	20	117.75
	RC20-SF1.5	260	1040	360	650	150	20	117.75
	RC30-SF1.5	390	910	360	650	150	20	117.75
	RC40-SF1.5	520	780	360	650	150	20	117.75
	RC50-SF1.5	650	650	360	650	150	20	117.75
	RC60-SF1.5	780	520	360	650	150	20	117.75
	RC70-SF1.5	910	390	360	650	150	20	117.75
	RC80-SF1.5	1040	260	360	650	150	20	117.75
	RC90-SF1.5	1170	130	360	650	150	20	117.75
	RC100-SF1.5	1300	0	360	650	150	20	117.75

NC natural aggregate concrete, RC recycled aggregate concrete
RC10, RC20, RC30, RC40, RC50, RC60, RC70, RC80, RC90, and RC100; denote the recycled aggregate substitution ratios by weight at 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%, respectively; and SF0.5, SF1.0, and SF1.5 denote the steel fiber volume fraction ratios at 0.5%, 1.0%, and 1.5%, respectively