| Title |
Development of Ready-mixed Shotcrete I ： Basic Study |
| Keywords |
ready-mixed shotcrete;aggregate quality;maximum size of coarse aggregate;segregation;synthetic fiber;blast furnace slag;레디믹스트 숏크리트;골재 품질;굵은 골재 최대치수;재료분리;합성섬유;고로슬래그 |
| Abstract |
Ready-mixed shotcrete that mixed with high quality aggregate and can improve construction quality is produced in a dry mortar plant and transported to construction sites. Because of using aggregate that produced in a special plant. Ready-mixed shotcrete has many advantages ： good grain-size distribution, minimum stone powder, high quality and standardization material, etc. In this basic study different from the existing study that limited to additive and accelerator, the improvement of aggregate quality was tried to upgrade the shotcrete performance. The investigation about the construction conditions of shotcrete was performed and the result of an opinion poll was analyzed for a good grasp of the problems in domestic shotcrete quality. Pilot Plant Test was also performed to minimize the material segregation in plant manufacturing process. In additions, the field test was performed to find the optimum contents of synthetic fiber, appearing the same flexible toughness with that of steel fiber, and to find the optimum replacement ratio of blast furnace slag. |