Abstract
The purpose of this study is to estimate mix proportion of shotcrete, which changed a dosage of accelerator and water-cement ratio. The shotcreting mechanism was considered on the basis of the estimated mix proportion. The occurrence of rebound and dehydration phenomenon gives variety to base concrete. For changing a dosage of accelerator, amount of the cement in the shotcrete decreased with an increase in a dosage of accelerator, and amount of the aggregate in shotcrete increased with an increase in a dosage of accelerator. For changing the water-cement ratio, amount of the cemet in the shotcrete increased with a decrease in the water-cement ratio, and amount of the aggregate in the shotcrete decreased with a decrease in the water-cement ratio. The acceleration of hydration and decrease in water-cement ratio were increased the viscosity of paste. The increase in viscosity of paste also gives variety to the base concrete. Accordingly, the viscosity of paste affects shotcreting mechanism.
