Research Article
Experimental Evaluation of Bond Strength between Setting Retarder Added Concrete and Normal Concrete
Table 2
Summary of test result on the 7th day.
| | Specimen code | Roughness | Setting retarder (%) | (kN) | (mm) | Failure mode |
| | R_N_8 | — | 1 | 247.9 | 7.7 | Compressive failure | | R_N_16 | — | 1 | 199.2 | 7.3 | Compressive failure | | R_N_24 | — | 1 | 140.4 | 6.5 | Bond failure | | R_N_72 | — | 1 | 100.6 | 4.4 | Bond failure | | R_B_8 | Brushing | 1 | 254.7 | 9.2 | Compressive failure | | R_B_16 | Brushing | 1 | 237.7 | 9.8 | Compressive failure | | R_B_24 | Brushing | 1 | 223.0 | 9.1 | Bond failure | | R_B_72 | Brushing | 1 | 107.0 | 6.1 | Bond failure | | N_N_8 | — | | 152.1 | 6.9 | Bond failure | | N_N_16 | — | | 108.9 | 7.2 | Bond failure | | N_C_16 | Chipping | | 156.3 | 6.8 | Bond failure |
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maximum load; maximum displacement. |
