| 摘要 |
<p>A soil aggregate composition using process sludge is provided to be usable as fine aggregate of construction materials, and filling materials of pavement blocks, embankment blocks, lightweight blocks, or clay blocks. A soil aggregate composition for civil engineering and construction materials using process sludge includes 100 parts by weight of sludge, 20-50 parts by weight of a coarse pozzolan material(reject ash) having a specific surface area of 2,000 cm^2/g or less, 10-40 parts by weight of fly ash having a specific surface area of 3,000-3,500 cm^2/g, 5-35 parts by weight of process sludge produced as byproducts from the production process of polyesters, artificial marble, and other chemical products, 1-5 parts by weight of ferrous sulfate, and 10-25 parts by weight of at least one inorganic binder selected from the group comprising calcium oxide, blast furnace slag powder, portland cement, and mixtures thereof. The sludge is water treatment sludge, sewage sludge, or a mixed sludge thereof. When the water treatment sludge and sewage sludge are individually used, the sludge is used in an amount of 100 parts by weight. When the mixed sludge is used, the water treatment sludge and sewage sludge are used in amounts of 10-90 parts by weight, respectively. Further, an average diameter of the fly ash is 30 to 50 mum.</p> |
