Seal Material for Steel Pipe Grouting and Steel Pipe Grouting Method Using the Same

摘要

The present invention is a new sealing material composition that can be advantageously used for sealing work in the steel pipe grouting method, which enables early injection of the injection material by shortening the setting time and minimizes voids by reducing bleeding, and preferably using it to shorten the construction period It relates to a steel pipe grouting method that can be shortened. The sealing material composition according to the present invention is characterized in that, in the sealing material composition for grouting steel pipe prepared by using cement and bentonite as binders, an inorganic admixture is further included in the binder. Here, the inorganic admixture includes: 35 to 70 wt% of an alkali active reaction curing agent; 25 to 50% by weight of the fast economy, 2.5 to 8.0% by weight of an expanding agent, 2.0 to 6.0% by weight of a low-temperature spun PVA fiber prepared in a fiber form by rapidly cooling a PVA aqueous solution of 70-80°C by spinning at 1-5°C low temperature; 0.05 to 1.0% by weight of the retardant;