GROUT-FILLED COMPOSITION FOR PRECAST SLAB TRACK

摘要

The present invention relates to a filling composition for integrating a precast slab panel of a precise slab track (PST), which replaces the ballast bed track of a rail, and a concrete base layer which is the lower structure of the precast slab panel. The filling composition comprises: 25-45 wt% of OPC; 2-5 wt% of CSA; 1-3 wt% of anhydrous gypsum; 35-49 wt% of fine aggregate having 0.85-1.2 of diameter; 15-25 wt% of fine aggregate having 0.1-0.25 of diameter; 0.1-0.4 wt% of water-reducing agent; 0.01-0.03 wt% of thickener; 0.03-0.07 wt% of antifoaming agent; and 0.02-0.03 wt% of expansion agent.