钢渣作为混合材在复合水泥中的应用

对钢渣作为一种混合材在复合水泥中的综合利用进行了研究,并通过X线衍射(XRD)、扫描电镜(SEM)、水化热测试、孔结构测试等现代物相检测手段,揭示钢渣复合水泥微观结构与宏观性能之间的内在联系。结果表明:钢渣能显著降低水泥的水化热,降低水泥的标准稠度用水量;钢渣水泥浆体线膨胀率很小,均没有超过0.1%,体积稳定性良好;一定掺量混合材能有效降低浆体孔隙率,改善孔径分布,提高浆体致密度;复合掺加20%钢渣、10%粉煤灰时,水泥的28 d抗折、抗压强度分别达到了8.3、48.9 MPa;钢渣和粉煤灰复合掺加有利于水泥强度发展。

Steel slag used as admixture in composite cement

Steel slag used as cement admixture in composite cement and the internal relation between microstructure and macroscopic properties of cement investigated by X-ray diffraction(XRD),scanning electron microscope(SEM),pore structure analyzer,hydration heat analyzer and other modern analysis methods.The results showed that the water usage for standard consistence and the hydration heat of cement doped by steel slag were reduced.And the cement paste mixed steel slag had the following features,such as low linear expansion rate(less than 0.1%),non-shrinkage and excellent volume stability.A certain amount admixture in cement could reduce the porosity,improve pore distribution and increase the consistency of cement.With the admixture of 20% steel slag and 10% fly-ash,the flexural and compressive strengths of cement at 28 d could reach 8.3 MPa and 48.9 MPa respectively,and compound cement doped by steel slag and fly ash was contributed to the strength development of cement efficiently.