Soriano Lourdes, Borrachero María Victoria, Giménez-Carbo Ester, Tashima Mauro M, Monzó José María, Payá Jordi
Giquima-Research Group of Building Materials Chemistry, Instituto Universitario de Investigación de Ciencia y Tecnología del Hormigón ICITECH, Universitat Politècnica de València, 46022 Valencia, Spain.
Materials (Basel). 2024 Mar 6;17(5):1219. doi: 10.3390/ma17051219.
Supplementary cementitious materials (SCMs) have been used in the construction industry to mainly reduce the greenhouse gas emissions associated with Portland cement. Of SCMs, the petrochemical industry waste known as fluid catalytic cracking catalyst residue (FCC) is recognized for its high reactivity. Nevertheless, the binders produced using SCMs usually present low mechanical strength at early curing ages. This study aims to assess the effect of different accelerating additives (KOH, sodium silicate SIL, commercial additive SKR) on the mechanical strength of mortars containing FCC. The results show that after only 8 curing hours, the compressive strength gain of the FCC mortars containing SKR was over 100% compared to the FCC mortar with no additive (26.0 vs. 12.8 MPa). Comparing the compressive strength of FCC mortar containing SKR to the control mortar, the enhancement is spetacular (6.85 vs. 26.03 MPa). The effectiveness of the tested accelerators at 8-24 curing hours was KOH ≈ SIL < SKR, whereas it was KOH < SIL < SKR for 48 h-28 days. The thermogravimetric data confirmed the good compatibility of FCC and the commercial accelerator.
辅助胶凝材料（SCMs）已被应用于建筑行业，主要用于减少与波特兰水泥相关的温室气体排放。在SCMs中，被称为流化催化裂化催化剂残渣（FCC）的石化工业废料因其高反应活性而受到认可。然而，使用SCMs生产的粘结剂在早期养护龄期通常表现出较低的机械强度。本研究旨在评估不同促凝添加剂（氢氧化钾、硅酸钠SIL、商业添加剂SKR）对含FCC砂浆机械强度的影响。结果表明，仅养护8小时后，含SKR的FCC砂浆的抗压强度增幅比无添加剂的FCC砂浆高出100%以上（26.0对12.8MPa）。将含SKR的FCC砂浆的抗压强度与对照砂浆相比，增强效果显著（6.85对26.03MPa）。在8 - 24小时养护期内，测试的促凝剂的有效性为氢氧化钾≈硅酸钠SIL < SKR，而在48小时 - 28天内则为氢氧化钾 < 硅酸钠SIL < SKR。热重数据证实了FCC与商业促凝剂具有良好的相容性。
