Large-Hole Expansive Demolition Grout Brighttop Global Co., Ltd. supplies large-hole expansive demolition grout developed for controlled, non-explosive cracking of rock and concrete. It is suitable for large-diameter drill holes ranging from 70 mm to 140 mm and is designed to create effective cracking within approximately 12–48 hours under suitable working conditions. The expansive grout can be used for quarrying, mining, boulder splitting, foundation removal and reinforced