Research Article
Causes of Early Age Cracking on Concrete Bridge Deck Expansion Joint Repair Sections
Table 2
Mixture proportions and experimental results for Mixture number 1 and Mixture number 2.
| | | Mixture number 1 | Mixture number 2 | | | Proportions by weight kg/m3 | Proportions by weight kg/m3 |
| | Cementitious material | 390 | 362 | | Cement | 254 | 236 | | GGBFS | 136 | 127 | | Water* | 168 | 160 | | Coarse aggregate | 1103 | 1103 | | Fine aggregate | 603 | 645 | | w/cm | 0.43 | 0.44 | | Cementitious paste Content (%) | 35.6 | 33.8 | | Peak heat of hydration (°C) | 36 | 36 | | Concrete COTE (strain/°C) | | | | Thermal strain (μ ε) | 116 | 113 | | Unrestrained drying Shrinkage (μ ε) | 418 | 378 | | 28-day indirect tensile strength | 2.59 | 2.82 | | Age of cracking during restrained ring test (day) | >28, 11, 15 | >40, >40, >40 | | Average stress rate for restrained ring test (MPa/day) | 0.19 | 0.08 |
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Including the water mass necessary to saturate aggregates.
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