Mechanical Properties of Steel Fibers and Nanosilica Modified Crumb Rubber Concrete

Table 3

Test results of the specimens’ compressive strengths at 7 d and 14 d (unit: MPa).

Group	C-7 d			CAvg-7	C-14 d			CAvg-14
C35CR5
1SF0	28.1	32.5	31.2	31.4	34.6	36.4	38.0	36.3
1SF0.5	32.7	32.3	31.3	32.1	42.2	40.3	42.2	41.6
1SF1	38.0	35.9	37.2	37.1	40.4	37.3	40.3	39.3
1SF1.5	32.0	30.2	31.6	31.3	35.4	38.1	38.7	37.4
1SF1NS1	38.1	39.1	38.2	38.5	43.5	42.7	42.9	43.1
1SF1NS2	43.4	42.1	43.3	42.9	47.9	43.1	45.3	45.5
C45CR5
2SF0	38.4	41.3	42.5	40.8	43.8	42.7	41.1	42.6
2SF0.5	47.6	46.3	49.4	47.8	48.7	49.3	47.6	48.5
2SF1	48.9	48.3	50.7	49.3	52.4	53.3	50.3	52.0
2SF1.5	45.9	52.8	47.8	48.8	47.7	46.2	54.1	49.3
2SF1NS1	45.8	46.8	45.7	46.1	49.2	49.1	48.3	48.9
2SF1NS2	48.5	51.8	54.5	51.6	54.3	55.6	57.5	55.8
C45CR10
3SF0	41.2	39.3	38.2	39.6	46.6	46.7	49.8	47.7
3SF0.5	47.7	46.2	45	46.3	48.3	46.5	48.8	47.8
3SF1	50.7	48.4	51	50.1	51.9	49.5	49.7	50.4
3SF1.5	50.4	49.4	42.7	47.5	48.5	49.6	50.9	49.6
3SF1NS1	42.0	42.9	42.1	42.3	45.3	44.0	44.5	44.6
3SF1NS2	43.0	43.9	40.1	42.3	41.1	45.3	41.2	44.5