Fly ash (FA) with high glassy phase content is a pozzolanic material with low activity, while carbide slag is a solid waste with portlandite crystals embedded in the impurity phases. Herein, wet-grinding method was used twice to improve the pozzolanic reactivity of FA and promote the dissolution of embedded calcium hydroxide in the CS as a lime source, respectively. Wet-grinded FA slurry (WFA) with D50 of 2.5 μm and wet-grinded CS slurry (WCS) with D50 of 3.0 μm were prepared. It was found that setting times, hydration heat release, early and late compressive strength, carbonation resistance of high volume WFA blended composites were significantly enhanced by WCS, attributed to the pre-dissolved calcium resource and alkali reserve. However, an excessive amount (12 wt%) of WCS addition causes an abnormal decrease in strength, due to the microstructure degradation by coarse portlandite crystals. Higher proportion of C-S-H might be ready for carbonation in high volume WFA blended composites, due to the promoted Al incorporation in C-S-H by wet-grinding.

具有高玻璃相含量的飞灰 (FA) 是一种活性低的火山灰材料，而电石渣是一种固体废物，在杂质相中嵌入了硅酸盐晶体。在本文中，两次湿磨法分别用于提高 FA 的火山灰反应性和促进嵌入的氢氧化钙在作为石灰源的 CS 中的溶解。制备 D50 为 2.5 μm 的湿磨 FA 浆料 (WFA) 和 D50 为 3.0 μm 的湿磨 CS 浆料 (WCS)。结果表明，WCS 可显着提高大体积 WFA 共混复合材料的凝固时间、水化放热、早期和晚期抗压强度、抗碳化性，这归因于预溶解的钙资源和碱储备。然而，过量 (12 wt%) 的 WCS 添加会导致强度异常下降，由于粗硅酸盐晶体的微观结构退化。由于湿磨促进了铝在 CSH 中的掺入，因此更高比例的 CSH 可能已准备好在大体积 WFA 混合复合材料中进行碳化。