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通过测定钢渣碳化反应中的温度变化,分析钢渣碳化产物的矿物相,以及测试碳化前后钢渣的热重及孔结构变化,研究钢渣碳化的放热性能和结构组成变化。结果表明:钢渣水化24h累计放热量为30J/g,而钢渣试样碳化1h的累计放热总量达95J/g。碳化后的钢渣试样中有碳酸盐矿物生成,每kg钢渣约可固化储存CO2气体121.8g,并且试样的孔隙率由碳化前的21.76%降至13.34%,抗压强度由碳化前的6.69MPa提高至42.14MPa,且碳化后试样压蒸安定性合格。
By analyzing the temperature change in the slag carbonization reaction, analyzing the mineral phase of the steel slag carbonization product, and testing the thermal weight and pore structure changes of the steel slag before and after carbonization, the exothermic properties and the structural changes of the steel slag were studied. The results show that the cumulative heat release of steel slag after hydration for 24 hours is 30J / g, while the total amount of exothermic heat generation of steel slag sample for 1h is 95J / g. Carbonized steel slag samples were carbonate minerals, each kg of steel slag can be stored about 121.8g of CO2 gas, and the porosity of the sample from 21.76% before the carbonation reduced to 13.34%, the compressive strength of carbonized by the pre- 6.69MPa increased to 42.14MPa, and the pressure stability of the sample after steaming qualified.