一、引言速凝剂是混凝土锚喷支护工程中必不可少的一种外加剂。巷道、隧道,峒宝等工程中采用锚喷支护新技术,可大大加快工程进度,节省劳力,节约木材和混凝土用量,并可减少地下工程土方开挖量。因此,混凝土喷射施工工艺的应用范围不断扩大,速凝剂的研制,生产 I. INTRODUCTION Accelerating accelerator is an indispensable admixture in the concrete anchor-shotcreting support project. The use of new technologies for bolting and spraying support in roadways, tunnels, and gongbao projects can greatly speed up the progress of the project, save labor, save the amount of wood and concrete, and reduce the excavation volume of underground works. Therefore, the scope of application of concrete spray construction technology is continuously expanding, and the development and production of accelerators