Alkali-free and chlorine-free liquid setting accelerator for sprayed concrete and preparation method thereof

The invention discloses an alkali-free and chlorine-free liquid setting accelerator for sprayed concrete. The alkali-free and chlorine-free liquid setting accelerator is composed of the following components in percentages by weight: 25 to 55% of aluminum sulfate, 5 to 10% of aluminum hydroxide, 14 to 20% of inorganic acid, 0.1 to 0.5% of a stabilizing agent, 1 to 3% of an organic early strength agent, 0.1 to 0.5% of a pH regulator, and water. The invention also discloses a preparation method for the alkali-free and chlorine-free liquid setting accelerator. The alkali-free and chlorine-free liquid setting accelerator provided by the invention has the following beneficial effects: the harm to an construction personnel is reduced; the loss of concrete later-stage strength is reduced or avoided; the procedures of preparation are few; and no pollution is generated to the surrounding environment of a construction area. 本发明公开了种喷射混凝土用无碱无氯液体速凝剂，它由按重量百分比分别为25~55%硫酸铝、5~10%氢氧化铝、14~20%无机酸、0.1~0.5%稳定剂、1~3%有机早强剂、0.1~0.5%PH调