外加剂对硫氧镁水泥的改性作用

通过对硫氧镁水泥材料进行改性,使其试块在空气中性质稳定,同时获得具有较高的抗压强度。为了对比外加剂对硫氧镁水泥试块抗水性能的影响,试块水养护和空气养护同时进行,并测试3 d、7 d、28 d龄期的抗压强度,试块空气养护28 d后转置入水中养护,取得水对硫氧镁水泥的软化影响(K)。对龄期为28 d样品进行扫描电子显微镜(SEM)微观形貌分析和X-射线衍射(XRD)物相分析。实验结果显示两种外加剂能够有效提高硫氧镁水泥材料的稳定性和抗压性能,同时对提高材料抗水性能有一定的效果。

Influence of Modifiers on Magnesium Oxysulfate Cement

To investigate the influence of modifiers on the properties of magnesium oxysulfate cement,a contrastive study has been conducted.The modified and unmodified mixtures are curing in air or in water independently and simultaneously.The compressive strengths of the samples are recorded after curing 3,7 and 28 days.Options like scanning electron microscope(SEM) and X-ray diffraction(XRD) were utilized to characterize the phases and their transforms caused by modification and curing process.The results reveal that the modified samples are stable enough and are stronger in compressive strength,in water-resistant aspect;the modifiers show a good quality in resisting water attack.