基于工作性的湿喷射混凝土配合比设计

Mix design of wet-mix shotcrete based on workability

针对湿喷射混凝土的工作性存在可压送性与可喷性难于协调统一的特点,借鉴Chapdelain提出的可压送混凝土的最少胶浆理论,按照计算法与简易试验法确定了合成集料紧装堆积状态下的空隙体积,依据润滑层相对胶浆体积量公式计算了润滑层胶浆量,提出了基于工作性的湿喷射混凝土配合比设计方法,在隧道斜井应用中表明该方法可行。

The requirements of wet-mix shotcrete with regard to workability are in conflict.By utilizing the theory of the least paste for pumpability advanced by Chapdelain,according to calculation method and simple test method to obtain the closed packing granular voids,and based on the formula of relative amount of paste required for lubricating layer,the method of mix design of wet-mix shotcrete based on workability is proposed.Through applied to inclined shaft,it shows that the mix design method is feasible.