| abstract |
[PROBLEMS] In the prelining method, (1) High fluidity and easy pumping and filling of large quantities of cement concrete into excavation grooves and slits, (2) Formwork and cement concrete when casting cement concrete Provided is a quick-setting cement concrete for prelining having characteristics such that a gap between lining bodies and a defect such as a jumper are hardly generated. A quick-setting cement concrete for prelining containing a high-performance water reducing agent, cement, a quick-hardening material, and a liquid setting modifier, and a quick-setting cement concrete for prelining characterized by using the same. The quick-setting cement concrete for prelining of the present invention has high fluidity and can be easily filled and filled with no gaps in the excavation groove, etc., has a rapid strength development, and has a sufficiently high strength from the beginning to 4 weeks. Suitable for pre-lining method in super large cross section, flat cross section and deep tunnel. [Selection figure] None |