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Table 4 Compressive strengths of NA and RCA fly ash concretes after being exposed to marine environment for 7 years.

From: Utilization of Recycled Aggregate Concrete for Marine Site Based on 7-Year Field Monitoring

Mix Compressive strength (MPa) Compressive strength at 7 years compared to 28 days (%)
28 days 7-year exposure in marine site
I40 48.6 48.2 99
I40FR00 38.3 30.3 79
I40FR15 38.1 35.5 93
I40FR25 41.4 38.1 92
I40FR35 35.7 32.6 91
I40FR50 31.6 27.1 86
I45 42.6 41.9 98
I45FR00 30.4 24.2 80
I45FR15 37.3 30.9 83
I45FR25 31.7 27.1 85
I45FR35 28.5 25.5 89
I45FR50 27.0 23.2 86
I50 39.1 38.4 98
I50FR00 28.5 21.6 76
I50FR15 31.0 23.2 75
I50FR25 30.5 23.7 78
I50FR35 28.2 21.2 75
I50FR50 26.7 21.1 79