| Title |
An Experimental Study on the Interfacial Separation of Aggregates for Recycling of Concrete Waste |
| Authors |
Park Cha-Won ; Kang Byeung-Hee |
| Keywords |
completely recyclable concrete ; recycled cement ; recycled aggregate ; interfacial separation |
| Abstract |
The purpose of this study is to provide the basic data on the optimum method for interfacial separation for an effective recycle of concrete waste by using the thermal properties of concrete. ??Therefore, this study is proceeded by dividing the interface of concrete into cement paste and fine aggregates or mortar and coarse aggregate, considering the aspect of recycled cement and aggregate as the recycling use of concrete waste. ??As results of experiment, in case of recycle cement, the interfacial separation is easily appeared, yet it is shown that the mixed amount of powder included in fine aggregate greatly decreases. ??But, in case of recycle coarse aggregate, the effect of interfacial separation by preliminary heating is predominant. Especially, the bonding rate of mortar is the lowest during cycling heating 5 times every 120 minutes at 300℃. ??Hence, it is considered that it will be an excellent effect of quality control when applied to recycle coarse aggregate which is now in a phase of making practical based on the result of this research. |