The reactivity and early strength of cement:slag binders is usefully enhanced by the addition of sodium sulfate though the underlying mechanisms of the relationship between the enhanced hydration reactions and the structural aspects of the strength behavior remain unclear. In this study, microstructural development in the presence of Na₂SO₄ was investigated utilizing mercury intrusion porosimetry (MIP), NMR relaxometry, and XRD. Increased rates of early strength development and decreased rates of late strength development due to the presence of added Na₂SO₄ were linked to effects on capillary porosity refinement. While degree of hydration at later age was shown to have been lower in the presence of Na₂SO₄, and may have been responsible for the higher capillary porosity, a clear alteration in the pathway of microstructural development had occurred with inhibition to hydration of the slag component due to earlier microstructural development proposed.

尽管增强的水化反应与强度行为的结构方面之间关系的潜在机制仍不清楚，但添加硫酸钠可有效提高水泥：矿渣粘合剂的反应性和早期强度。在这项研究中，利用压汞法 (MIP)、NMR 弛豫法和 XRD研究了在 Na ₂ SO ₄存在下的微观结构发展。由于添加的 Na ₂ SO ₄的存在，早期强度发展速度的增加和后期强度发展速度的降低与对毛细管孔隙细化的影响有关。虽然在 Na ₂ SO的存在下，后期的水合程度显示出较低_{如图 4 所示}，并且可能是导致较高的毛细管孔隙率的原因，微观结构发展的途径发生了明显的改变，由于早期提出的微观结构发展抑制了渣组分的水合。