| Title |
The Study on the Mechanical Property of Mortar and Quality Performance of Dredged Sand Produced by Washing and Sorting System |
| Authors |
Lee Sang-Soo ; Lee Yun-Seong ; Song Ha-Young |
| Keywords |
Dredged Soil ; Micro-particles ; Absorption Rate ; Organic Impurity Content |
| Abstract |
Most of the dredged sand generated from the sewage pipe maintenance project and the government's four-river project are disposed depending on abandonment and filling-up. This is caused by the lack of related recycling technology using dredged sand appropriately and high absorption rate and micro-particles of dredged sand producted from existing sand production system. Thus, this study carried out a quality evaluation for the dredged sand produced through the optimum washing and sorting system supplementing problems of existing dredged sand production system as a part of research to examine performance of removing micro-particles and foreign substances. As a result of the study, the dredged sand produced through the washing and sorting system showed a wide quality improvement effect in absorption rate, 0.08mm sieve pass amount, clay lump volume and organic impurity content, and it turned out to satisfy both the quality standards of this study, KS F 2573(recycled aggregate for concrete) and KS F 2526(aggregate for concrete) so it could be confirmed that it would be able to be used as an aggregate for concrete in the future. Also, the flow and compressive strength of the mortar test result, DS-II(washing and sorting after) was shown to be very superior to the natural sand. |