OVERLAY PAVEMENT AND REPAIRING METHOD FOR ROAD WITH RAPID SET ACRYLIC-MODIFIED CONCRETE AND SUFACE REINFORCING AGENT

摘要

An overlay pavement and road repairing method using rapid set acrylic-modified concrete and surface reinforcing agent are provided to reinforce a surface layer of old concrete and bond the old concrete to new concrete securely. An overlay pavement and road repairing method using rapid set acrylic-modified concrete and surface reinforcing agent includes the steps of: removing a pavement by using a pavement breaker; removing a waterproof layer, flattening a surface course of a rough layer, removing degraded parts, floating rocks, and pollutant of concrete by using a short blaster or a water jet, and cleaning the surface course by using a sucking device to stable attach of concrete; spreading the surface reinforcing agent containing 0.1~60w% of alkali silicate. 30~50w% of solvent, 0.1~10w% of boric acid, and 5~60w% of partially hydrophobed water silica sol; pouring the rapid set acrylic-modified concrete; leveling the poured rapid set acrylic-modified concrete with a double vibrator or a concrete finisher to be horizontal to existing pavement; and stabilizing the surface of the pavement with a longitudinally inclined tinning equipment to prevent slide before the pavement hardens, and spreading surface course protecting agent to prevent concrete from cracking at the beginning.