Mix design of high performance wet shotcrete

Abstract

In order to reduce the springback rate of wet shotcrete and prepare high-performance wet shotcrete that meets on-site construction requirements and save costs, the Weiwu Expressway Suiguangshen Intercity Railway- Qianhai Turnback Line Tunnel is used as the engineering background, through on-site cooperation Selection of ratio parameters, design of mix ratio, on-site rebound rate test, sprayed large slab test and other methods, through optimization to find the mix ratio that best meets the actual engineering requirements and meets the principle of saving economic costs, so as to effectively reduce the rebound of wet shotcrete rate.