| Title |
A Study on the Effect of Accelerated Curing on the De-moulded Compressive Strength of Concrete |
| Abstract |
Domestic PC walls are generally produced from a specific accelerated curing system-what we call "Battery System" in Korea. This system is designed to increase the compressive strength when de-molding by using the elevated curing temperature. The concrete wall are heated indirectly by applying the electronic or steam heat on the single side of steel panel. In this case, plastic shrinkage cracks may be developed because of the accelerated temperature without humidity.The object of this study is to investigate the accelerated curing effects on the de-moulded compressive strength of concrete for PC walls. An alternative testing equipment is used in this study. The curing time and temperature can be programed and produced with a reasonable output in the electronic programming curing tank.The results of this study obtained from the various parametric experimental test is as follows; 1)At least 1 hours pre-heating period is necessary, 2)the ratio of rise in temperature should be less than 30c/hour to avoid temperature expansion of the concrete, and 3)the maximum curing temperature should be less than 82c to prevent the shrinkage cracks and to attain desirable compressive strength. |