HM-3 Alkali-Free Accelerator Powder | Shotcrete Preparation Guide
HM-3 alkali-free accelerator powder is used for shotcrete and can be prepared on site as a liquid alkali-free accelerator. Learn technical indicators, preparation ratios, dosage, application notes, storage and QC points.
What Is HM-3?HM-3 alkali-free accelerator powder is an aluminum sulfate based powder accelerator from Surface for shotcrete applications. It is designed for fast dissolution and can be prepared on site with water to make a liquid alkali-free accelerator. The preparation ratio can also be adjusted according to jobsite process requirements. Compared with regular liquid accelerators, the powder format supports long-distance transport, storage and export supply more conveniently. For shotcrete projects such as tunnels, mining, hydropower works, underground engineering, slope support and emergency repair, HM-3 can be discussed around setting speed, early strength, rebound control and on-site prep
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