Taoyuan International Airport pavement repair, Kaohsiung LRT, National Highway 3 pothole patching — all real R-Series deployments. R-1 and R1-1 may sound similar, but their use cases diverge sharply.

R-1 (High-Performance Ultra Early Strength Cement)

Pure cement formulation for large-area slab pours that need site-mixed aggregate proportioning. Foot traffic in 1 hour, heavy load in 6 hours.

R1-1 (High-Performance Early Strength Repair Mortar)

Pre-mixed mortar for spot repairs — cracks, potholes, exposed rebar — no on-site mixing required. Foot traffic in 45 minutes.

Quick rule

Large area → R-1; spot patch → R1-1. Compressive strength tables and thickness guidelines to follow.

(Sample article — to be expanded.)