| 摘要 |
PURPOSE: Provided is a manufacture method of admixture which prevents ocher from being cracked and increase the strength of ocher. The admixture provides inherent effects of soil such as bio far-infrared rays radiation, insulation, heat-accumulation and humidity controlling. CONSTITUTION: The method comprises steps of: (i) drying slag having a chemical composition of 34.51% of SiO2, 17.04% of Al2O3, 0.30% of Fe2O3, 42.65% of CaO, 6.87% of MgO and 0.06% of SO3 in a dryer and pulverizing it; (ii) respectively drying limestone having a chemical composition of 2.00% of SiO2, 0.40% of Al2O3, 0.30% of Fe2O3, 52.50% of CaO, 1.40% of MgO and 0.30% of SO3, gypsum having a chemical composition of 1.41% of SiO2, 0.92% of Al2O3, 0.10% of Fe2O3, 40.39% of CaO and 56.50% of SO3 and calcium hydroxide having a chemical composition of 1.20% of SiO2, 0.70% of Al2O3, 0.40% of Fe2O3, 60.50% of CaO, 1.40% of MgO and 0.20% of SO3 in a dryer and pulverizing them; and (iii) mixing the pulverized slag, limestone powder, gypsum powder and calcium hydroxide powder in a weight ratio of 5:1:2:2 and stirring the mixture. The composition has a chemical composition of 17.98% of SiO2, 8.89% of Al2O3, 0.28% of Fe2O3, 46.76% of CaO, 3.86% of MgO and 11.40% of SO3 and a fineness of 4,650 cubic centimeter/gram.
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