This study explored the viability of using coal bottom ash (CBA), treated as a silicate source for preparing activators, as a filler in strain-hardening alkali-activated composites. The silica content provided by CBA was approximately 30% of that provided by silica fume, and its surface morphology exhibited a rough texture after treatment. The incorporation of CBA led to an improved compressive strength, and the subsequent substitution of treated CBA up to 100% resulted in a 10% increase in the compressive strength. Furthermore, incorporating the treated CBA enhanced the bond strength and pullout energy by up to 70% and 75%, respectively, compared with those of plain composites. The treated CBA also improved the tensile performance, as the replacement rate increased. At a substitution rate of 100%, the tensile strength, strain capacity, and strain energy density increased by 168.64%, 118.3%, and 479.41%, respectively, compared with those of plain composites. Thus, utilizing CBA as an alkaline activator is a promising solution to environmental challenges in the field of construction materials.

中文翻译：

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应变硬化碱激活复合材料煤底灰处理新方法


本研究探讨了使用煤底灰（CBA）作为制备活化剂的硅酸盐源，作为应变硬化碱活化复合材料中的填料的可行性。 CBA提供的二氧化硅含量约为硅粉提供的二氧化硅含量的30%，处理后其表面形貌呈现出粗糙的纹理。 CBA 的加入提高了抗压强度，随后 100% 替代经过处理的 CBA，抗压强度提高了 10%。此外，与普通复合材料相比，经过处理的 CBA 的粘合强度和拔出能分别提高了 70% 和 75%。随着替代率的提高，经过处理的 CBA 还提高了拉伸性能。替代率为100%时，与普通复合材料相比，拉伸强度、应变能力和应变能密度分别提高了168.64%、118.3%和479.41%。因此，利用CBA作为碱性活化剂是解决建筑材料领域环境挑战的一个有前途的解决方案。