SHRINKAGE-REDUCING AND RAPID-HARDENING CEMENT CONCRETE COMPOSITION HAVING EXCELLENT DURABILITY AND REPAIRING METHOD OF ROAD PAVEMENT THEREWITH

摘要

The present invention relates to a shrinkage-reducing type rapid hardening cement concrete composition with excellent durability and a road pavement maintenance construction method using the same. The present invention includes: 5-45 wt% of rapid hardening binder; 10-75 wt% of fine aggregate; 10-65 wt% of coarse aggregate; 0.01-25 wt% of reforming admixture; and 0.1-25 wt% of water. The rapid hardening binder includes: 10-60 wt% of normal granular Portland cement which has fineness of 4,000-8,500 cm^2/g; 5-50 wt% of calcium sulfoaluminate; 1-40 wt% of calcium aluminate cement; 1-40 wt% of sericite; 1-40 wt% of blast furnace slag powder which has fineness of 4,500-8,500 cm^2/g; 0.1-20 wt% of gypsum; 0.01-20 wt% of bauxite; 0.01-10 wt% of cyclohexylamine nitrite; 0.01-10 wt% of lithium carbonate; and 0.01-10 wt% of sodium carbonate. The shrinkage-reducing type rapid hardening cement concrete composition according to the present invention can improve the strength, durability, and especially waterproofing and soundproofing properties of concrete by forming dense concrete by promoting the initial hydration and densification of the cement. The present invention can obtain an effect of preventing surface crack and expansion failure phenomenon by drying shrinkage by using an expanding agent and a shrinkage reducing agent.