On-site Reassembly Ultra Early Strength Concrete Composition and Road Concrete Repairing Method Using The Same

摘要

The purpose of the present invention is to provide an on-site re-mixed ultra-high-early-strength concrete composition, and a construction and maintenance method using the same, wherein a ready-mixed material comprises: 4.5-5.10 wt% of water; 11.00-13.50 wt% of cement; 40.00-42.50 wt% of fine aggregates; 29.50-31.00 wt% of coarse aggregates; 0.17-0.20 wt% of a water reducing agent; and 0.01-0.03 wt% of an air-entraining (AE) agent, and an additional admixture comprises: 3.40-3.90 wt% of latex; 0.90-2.10 wt% of a fast-hardening admixture; 5.20-6.00 wt% of an early-strength accelerating material; 0.08-0.12 wt% of an antifoaming agent; and 0.05-0.07 wt % of a retarder. Instead of using ultra-high-early-strength cement, pozzolan materials, such as silica fume, are used in a concrete pavement repairing material which requires implementation of early strength, and thus, usage of unit cement is reduced. Moreover, usage of conventional latex is significantly reduced while performance of concrete is maintained through advantageous effects of the pozzolan materials, and thus, it is possible to reduce continuously-increasing road pavement costs.