This research demonstrates the effect of curing conditions and carbonization enhancement on mechanical properties of fly ash (FA) - desulfurization gypsum (FGD) - steel slag (SS) gelation blocks. Five curing conditions, including dry-air curing, hot and humid curing, autoclave curing, hot and humid+autoclave curing, autoclave+hot and humid curing, were studied. The experimental results showed that the gelation block under the hot and humid+autoclave curing condition had the highest compressive strength, reaching 35.8MPa. The microstructural characterization of the gelation block by X-ray diffraction (XRD), Fourier-transfer infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA) and Scanning electron microscopy (SEM) indicated that the hot and humid + autoclave curing was favorable for producing more C-S-H gels and promoting the conversion of C-S-H gels to tobermorite crystals on the gelation block. Under the hot and humid+autoclave curing condition, both the tobermorite crystals and C-S-H gels resulted in more compact gelation blocks and thus their higher mechanical properties. The cured gelation block was subjected to enhanced carbonation, which resulted in a more compact gelation block with its pores filled with nano-size calcium carbonate and thus further improvement in its compressive strength by 19.6 %. The physical effect of enhanced carbonation on the gelation block is increased mass by 1.95 %, indicating that approximately 1.95 % of CO₂ of the mass of the respective gelation block can be absorbed.

这项研究证明了固化条件和碳化作用对粉煤灰（FA）-脱硫石膏（FGD）-钢渣（SS）胶凝块的力学性能的影响。研究了五种固化条件，包括干燥空气固化，湿热固化，高压釜固化，湿热+高压釜固化，高压釜+热湿固化。实验结果表明，湿热+高压釜固化条件下的胶凝块具有最高的抗压强度，达到35.8MPa。通过X射线衍射（XRD），傅里叶转移红外光谱（FT-IR）对凝胶化嵌段的微观结构进行表征，热重分析（TGA）和扫描电子显微镜（SEM）表明，湿热+高压釜固化有利于生产更多的CSH凝胶，并促进了CSH凝胶在凝胶化块上转化为钙铁矿晶体。在湿热高压釜的固化条件下，硅钙石晶体和CSH凝胶均导致更紧密的凝胶化嵌段，因此它们具有更高的机械性能。使固化的胶凝嵌段经受增强的碳酸化作用，这导致其孔填充有纳米级碳酸钙的更紧密的胶凝嵌段，因此其抗压强度进一步提高了19.6％。增强碳酸化作用对胶凝嵌段的物理作用使质量增加1.95％，表明约1.95％的CO 使固化的胶凝嵌段经受增强的碳酸化作用，这导致其孔填充有纳米级碳酸钙的更紧密的胶凝嵌段，因此其抗压强度进一步提高了19.6％。增强碳酸化作用对胶凝嵌段的物理作用使质量增加1.95％，表明约1.95％的CO 使固化的胶凝嵌段经受增强的碳酸化作用，这导致其孔填充有纳米级碳酸钙的更紧密的胶凝嵌段，因此其抗压强度进一步提高了19.6％。增强碳酸化作用对胶凝嵌段的物理作用使质量增加1.95％，表明大约1.95％的CO可以吸收相应凝胶块的质量的₂％。