The setting time of shotcrete and the adaptability of
materials except cement and accelerator cannot be determined according to the
setting time of cement slurry mixed with accelerator based on the existing
specifications. The application effect of these accelerators in the field is
poor, and shotcrete block and large rebound phenomena often occur. Accordingly,
the laboratory test and field construction are employed to analyze the
accelerator checking method and setting time control limit, which address the
problem that the test object of cement net slurry method is relatively single.
The results show that the application of shotcrete setting time test method and
setting time limit can accurately judge the adaptability of accelerator setting
time, and the test results are consistent with the actual use of the site,
which can effectively guide the site construction, improve the technical
benefit of shotcrete, save costs, improve construction efficiency, and provide
support for the safe operation.