A rapid-hardening binder containing low-heat cement and copper slag powder and polymer modified concrete composition

摘要

The present invention relates to a rapid hardening binder obtained by mixing low heat cement and copper slag fine powder, and a polymer modified concrete composition using the same. More specifically, the present invention relates to a polymer modified concrete composition which is composed of a rapid hardening binder, a polymer, an aggregate, and water and is capable of exhibiting practical strength at an initial stage (4-24 hours) by containing low heat cement, copper slag fine powder alkaline clinker (calcium sulfo aluminate, 3CaO·3Al_2O_3·CaSO). To this end, the low heat rapid hardening binder is composed of: 20-60 wt% of low heat cement; 5-30 wt% of copper slag fine powder having specific surface area of 3,500-4,500 cm^2/g; 30-45 wt% of the alkaline clinker; 5-20 wt% of gypsum; and 0.1-10 wt% of other admixtures. According to the present invention, by using the polymer modified concrete including the low heat rapid hardening binder, it is possible to effectively prevent cracks due to hydration heat when repairing a concrete structure such as a bottom plate of a bridge or concrete pavement.