Ebrahim Aya Allah M, Ahmed Doaa A, Abu-Elwafa Reham
Chemistry Department, Faculty of Women for Arts, Science and Education, Ain Shams University, Cairo11757, Cairo, 11757, Egypt.
Housing and Building National Research Center, 87 El Buhouth St, Giza, 1770, Cairo, Egypt.
Sci Rep. 2024 Nov 5;14(1):26727. doi: 10.1038/s41598-024-76780-5.
The construction industry is exploring the use of low-cost waste materials to create eco-friendly geopolymer mortar binders. Our study aims to develop various environmentally friendly geopolymer mortar mixes for thermal and adsorption applications using natural materials like bentonite and industrial by-products such as ground-granulated blast furnace slag and fly ash. Ternary geopolymer mortar pastes are prepared using equimolar amounts of slag (GBFS) and fly ash (FA), with 6%, 8%, 10%, and 12% weight of bentonite (BC) from the total geopolymer weight to study the bentonite replacement effect. The prepared mortar are tested for their physico-chemical, mechanical, adsorption, and thermal stability properties (300 °C to 900 °C). The adsorption behavior of eco-friendly geopolymer mortar mixes against crystal violet dye in aqueous solutions is also identified. The study found that adding 6% bentonite to the slag/fly ash-based geopolymer mortar mix yielded the highest mechanical characteristics. Moreover, all the ternary geopolymer mortar mixes exhibited excellent thermal stability up to 900 °C. In adsorption study, the results indicated that the mortar mixes had excellent capacities and adhered well to the Freundlich isotherm model, suggesting potential applications in treating wastewater. Using bentonite in slag/fly ash geopolymer mortar offers a sustainable, cost-effective, and heat-resistant alternative to traditional cement binders.
建筑行业正在探索使用低成本废料来制造环保型地质聚合物砂浆粘结剂。我们的研究旨在利用膨润土等天然材料以及粒化高炉矿渣和粉煤灰等工业副产品，开发用于热应用和吸附应用的各种环保型地质聚合物砂浆混合物。使用等摩尔量的矿渣（GBFS）和粉煤灰（FA）制备三元地质聚合物砂浆浆料，并加入占地质聚合物总重量6%、8%、10%和12%的膨润土（BC），以研究膨润土的替代效果。对制备的砂浆进行物理化学、力学、吸附和热稳定性性能测试（300℃至900℃）。还确定了环保型地质聚合物砂浆混合物对水溶液中结晶紫染料的吸附行为。研究发现，在基于矿渣/粉煤灰的地质聚合物砂浆混合物中添加6%的膨润土可产生最高的力学性能。此外，所有三元地质聚合物砂浆混合物在900℃以下均表现出优异的热稳定性。在吸附研究中，结果表明砂浆混合物具有优异的吸附能力，并且很好地符合弗伦德利希等温线模型，表明其在处理废水方面具有潜在应用。在矿渣/粉煤灰地质聚合物砂浆中使用膨润土为传统水泥粘结剂提供了一种可持续、经济高效且耐热的替代品。
