| Title |
The Influence of Moisture State of Aggregates on the Properties of Recycled Aggregate Concretes |
| Authors |
Yang Keun-Hyeok ; Lee Jae-Sam ; Chung Heon-Soo |
| Keywords |
recycled aggregate concretes ; moisture state ; mechanical properties |
| Abstract |
Due to the high water absorption capacity of recycled aggregates, prewetted recycled aggregates has been usually used. However, several researchers indicated that wet processing on recycled aggregates is not necessary and the effect of prewetting on the mechanical properties of the new concrete has not been studied completely. The objective of this study is to investigate the influence of moisture states of recycled aggregates on the properties of fresh and hardened concretes. The moisture states of the recycled aggregates were controlled at oven-dried(OD), air-dried(AD), and prewetted(WD) states prior to use. The properties of the fresh concrete were measured by means of slump, slump loss for elapsed time, and bleeding, while the compressive, splitting tensile, and flexural strengths, elastic modulus, shrinkage strain, and resistance of freeze-thaw tests were conducted on the hardened concrete. Test results and analyses focused on the relationship the moisture states of recycled aggregates and the properties of concrete were summarized. |