| Title |
Endurance Characteristics of High Early Strength and Low Heat Concrete using Mineral High Early Strength Type Binder |
| Authors |
Kim, Kyoung-Min ; SonHo-Jung |
| Keywords |
early age strength ; low heat cement ; heat of hydration ; mass concrete |
| Abstract |
This study analyzes basic and endurance characteristics of mass concrete mixed with mineral binder and the result can be summarized as follow: For unhardened concrete slump, all cases are satisfied with the target range, however the high early strength and low heat case has little bit decreased tendency rather than other cases. And the air content also be satisfied with all cases within target range. For the compressive strength per material age as the characteristics of hardened concrete, Low heat-B mix shows the lowest compressive strength, and the other mixes show similar strength range, but in the initial material age, high early strength mix shows higher strength than low heat-A and low heat-B mix. For the drying shrinkage length change ratio, Low heat and low heat-B show the highest value as -455∼-423×10-6, and high early strength and low heat mix shows the lowest value as -410×10-6. In the carbonation depth of penetration according to change of mineral binder, the material age of 26 weeks shows the higher tendency regardless of mix as 15.4 mm∼17.3 mm. For the endurance factor according to freeze-thaw cycle, all cases show the good result as higher than 85 % regardless of mineral binder. All cases show acceptable chloride of diffusion coefficient caused by increase of watertightness from hydration product of binder, and the high early strength and low heat mix shows the better result than the other binder mixes as 4.44×10-12 m2/s. |