| abstract |
The present invention relates to a binder composition for precast concrete having excellent durability even in an environment requiring chemical resistance such as acidity and alkalinity, and more particularly, PC conduit for use in sewage boxes, coastal structures, chemical plants, food plants, roads, and the like. It is intended to have high durability even in environments exposed to chemical erosion such as, breakwater, reefs, various floors and blocks, boundary stones, median. The composition is composed of 30 to 60% by weight of Portland cement, 15 to 40% by weight of blast furnace slag, 10 to 30% by weight of fly ash, 2 to 10% by weight of gypsum, and aluminate In the binder composition for precast concrete composed by mixing 0.5 to 5% by weight of cement, 0.5 to 5 wt% of EVA (Ethylene Vinylacetate), acrylic and SBR (Stylene Butadiene Rubber) based resins, 1 to 10 wt% of metakaolin, and 0.5 to 5 wt% of modified sulfur having a melting point of 60 ° C. or less. Including more, The aluminate-based cement is characterized in that composed of one or a mixture of potassium sulfaluminate cement (PSA), magnesium sulfaluminate (MSA). |