Advances in Materials Science and Engineering / 2015 / Article / Tab 4

Research Article

Development of a New Type of Alkali-Free Liquid Accelerator for Wet Shotcrete in Coal Mine and Its Engineering Application

Table 4

Effect of vibration frequency on setting time under the same test conditions.

Accelerator mass content/%Vibration frequencyInitial setting time/minFinal setting time/minTest error/s

604.87.0>10
33.47.3<10
53.37.7<5
103.58.3<5
204.010.0<5
304.412.5<5

We are committed to sharing findings related to COVID-19 as quickly and safely as possible. Any author submitting a COVID-19 paper should notify us at help@hindawi.com to ensure their research is fast-tracked and made available on a preprint server as soon as possible. We will be providing unlimited waivers of publication charges for accepted articles related to COVID-19. Sign up here as a reviewer to help fast-track new submissions.