Abbas Ramadan, Abdelzaher M A, Shehata Nabila, Tantawy M A
Environmental Science and Industrial Development Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, 62511, Egypt.
Chemistry Department, Faculty of Science, Minia University, Minia, Egypt.
Sci Rep. 2024 Mar 1;14(1):5104. doi: 10.1038/s41598-024-55494-8.
Industrial by-products; have received a lot of attention as a possible precursor for cement and/or concrete production for a more environmentally and economically sound use of raw materials and energy sources. Geopolymer is a potentially useful porous material for OPC binder applications. The use of industrial wastes to produce a greener geopolymer is one area of fascinating research. In this work, geopolymer pastes were developed using alkali liquid as an activator and metakaolin (MK), alumina powder (AP), silica fume (SF), and cement kin dust (CKD) as industrial by-products. Several geopolymer samples have been developed. Research has been carried out on its processing and related physical and mechanical properties through deep microstructure investigation. The samples were cured in water by immersion with relative humidity (95 ± 5%), and at room temperature (~ 19-23 °C) prior to being tested for its workability and durability. The effect of the different composition of precursors on water absorption, density, porosity, and the compressive strength of the prepared geopolymers have been investigated. The results showed that the compressive strength of geopolymers at 28 days of curing is directly proportional to the ratio of the alkali liquid. Ultimately, the best geopolymer paste mixture (GPD1 and GPD2), was confirmed to contain (15% of CKD + 85% MK and Alumina solution (55 wt%)) and (25% of CKD + 75% MK + Alumina solution (55 wt%)) respectively, with 73% desirability for maximum water absorption (~ 44%) and compressive strength (4.9 MPa).
工业副产品；作为水泥和/或混凝土生产的一种可能的前驱体，因其能更环保、经济地利用原材料和能源而受到了广泛关注。地质聚合物是一种在普通硅酸盐水泥粘结剂应用中具有潜在用途的多孔材料。利用工业废料生产更环保的地质聚合物是一个引人入胜的研究领域。在这项工作中，以碱液作为活化剂，偏高岭土（MK）、氧化铝粉（AP）、硅灰（SF）和水泥窑灰（CKD）作为工业副产品来制备地质聚合物浆体。已制备了几种地质聚合物样品。通过深入的微观结构研究，对其加工过程以及相关的物理和力学性能进行了研究。样品在相对湿度为（95±5%）的水中浸泡养护，并在室温（约19 - 23℃）下养护，然后测试其工作性和耐久性。研究了前驱体不同组成对所制备地质聚合物的吸水率、密度、孔隙率和抗压强度的影响。结果表明，养护28天时地质聚合物的抗压强度与碱液的比例成正比。最终，确认最佳的地质聚合物浆体混合物（GPD1和GPD2）分别含有（15%的CKD + 85%的MK和氧化铝溶液（55 wt%））以及（25%的CKD + 75%的MK + 氧化铝溶液（55 wt%）），其最大吸水率（约44%）和抗压强度（4.9 MPa）的合意度为73%。
