Mechanical Properties of Steel Fibers and Nanosilica Modified Crumb Rubber Concrete

Table 1

Concrete mixture proportion (unit: kg/m³).

Group	Crumb rubber	Cement	Coarse aggregate	Fine aggregate	Water	Water-reducing ratio	Steel fiber	Nanosilica
C35CR5
1SF0	50	400	703	1004	169	4	0	—
1SF0.5	50	419	705	1060	177	4.5	39	—
1SF1	50	438	654	1045	185	5	78	—
1SF1.5	50	457	604	1029	193	5	117	—
1SF1NS1	50	433.62	654	1045	185	5	78	4.38
1SF1NS2	50	429.24	654	1045	185	5	78	8.76
C45CR5
2SF0	50	550	703	1004	180	7	0	—
2SF0.5	50	574	630	957	188	5	39	—
2SF1	50	599	572	931	196	5	78	—
2SF1.5	50	623	514	905	204	5	117	—
2SF1NS1	50	593.01	572	931	196	5	78	5.99
2SF1NS2	50	587.02	572	931	196	5	78	11.98
C45CR10
3SF0	100	590	1192	400	168	6	0	—
3SF0.5	100	618	1117	388	176	6	39	—
3SF1	100	646	1041	376	184	6	78	—
3SF1.5	100	674	966	365	192	7	117	—
3SF1NS1	100	639.54	156	358	189	6	78	6.46
3SF1NS2	100	633.08	1056	358	189	6	78	12.92