THE METHOD OF MAKING RECYCLING OF RESOURCE TYPE CONCRETE BRICK USING THE RECYCLED FINE AGGREGATES AND BLAST FURNACE SLAG POWDER AND THE PRODUCT

摘要

In the case of circulating fine aggregates generated from waste concrete when the construction is dismantled at the end of its life, there are many limitations in the practical application due to deterioration in quality due to cement mortar and foreign matters attached to the aggregate surface compared to natural aggregates. In addition, the blast furnace slag powder, an industrial by-product produced in steel mills, has the effect of reducing heat of hydration, increasing long-term strength, and increasing water tightness as concrete admixtures, while delaying initial hydration reaction and alkali consumption due to latent hydraulic reaction. There are problems such as promotion of neutralization. Therefore, the present invention induces the potential hydraulic reaction of the blast furnace slag fine powder with a large amount of calcium hydroxide {Ca (OH) ₂ } present on the surface of the circulating aggregate for the production of concrete bricks of KS F 4004 to express the strength, and also the circulating aggregate By supplementing alkali with fine powder, calcined recycled aggregate fine powder, or fine cement, it promotes latent hydraulic reaction to improve strength, improves appearance by filling voids, reduces carbon dioxide emissions and economically with low price. It is to manufacture resource recycling concrete brick products.