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首页> 美国卫生研究院文献>Materials >Effect of Carbonation on the Water Resistance of Steel Slag—Magnesium Oxysulfate (MOS) Cement Blends
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Effect of Carbonation on the Water Resistance of Steel Slag—Magnesium Oxysulfate (MOS) Cement Blends

机译：碳酸化对钢渣 - 氧化镁（MOS）水泥共混物耐水性的影响

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摘要

Magnesium oxysulfate (MOS) cement has the advantages of lightweightedness, high strength, and low thermal conductivity, but the utilization of MOS cement is limited due to low water resistance. This paper studied the influence of steel slag and CO2 treatment on the compressive strength and water resistance of MOS cement. The hydration products and microstructures were characterized by X-ray diffraction (XRD), thermogravimetric analysis–differential scanning calorimetry (TG–DSC), scanning electron spectroscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). The results showed that the strength of MOS cement reached 89.7 MPa with steel slag and CO2 treatment; the water-resistance coefficients of the control and samples containing 10%, 20%, and 30% reached 0.91, 0.81, 1.01, and 1.08 MPa, respectively. The improvement in the strength and water resistance coefficients was because of carbonation that accelerated the hydration of C2S in the steel slag and formed a Ca–Mg–C amorphous substance. The carbonation products contributed to better water stability and denser matrix denser while inhibiting the hydration of MgO, which led to improving the water resistance of the sample.
机译：氧硫酸镁（MOS）水泥具有轻质，强度和低导热率的优点，但由于低耐水性，MOS水泥的利用受到限制。本文研究了钢渣和CO2处理对MOS水泥抗压强度和耐水性的影响。通过X射线衍射（XRD），热重分析 - 差示扫描量热法（TG-DSC），扫描电子光谱（SEM）和傅里叶变换红外光谱（FTIR），以X射线衍射（XRD），热分析分析 - 差示扫描量热量（FTIR）的特征在于，水化产物和微观结构。结果表明，MOS水泥的强度达到89.7MPa，钢渣和CO2处理;对照的耐水系数和含有10％，20％和30％的样品达到0.91,0.81,1.01和1.08MPa。强度和耐水系数的改善是因为碳酸化加速了钢渣中C2s的水合并形成了Ca-Mg-C无定形物质。碳化产品有助于更好的水稳定性和更密集的基质密集，同时抑制MgO的水合，这导致了提高样品的耐水性。

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