Nemaleu Juvenal Giogetti Deutou, Belela Elodie Awam, Nana Achille, Kaze Rodrigue Cyriaque, Venyite Paul, Yanou Rachel Nkwaju, Djobo Jean Noel Yankwa, Kamseu Elie
Local Materials Promotion Authority (MIPROMALO), P.O. Box, 2396, Yaoundé, Cameroun.
Research Unit of Noxious Chemistry and Environmental Engineering, Faculty of Science, Department of Chemistry, University of Dschang, P.O. Box 67, Dschang, Cameroon.
Environ Sci Pollut Res Int. 2022 Jul;29(33):50804-50818. doi: 10.1007/s11356-022-19415-4. Epub 2022 Mar 3.
The exploitation of volcanic rock quarries generates enormous waste, which causes the problem of disposal, leading to rising dust levels in quarries and depositions on nearby farms by runoffs. To address this issue, the development of sustainable solution for their valorization in construction industries is required. The present investigation aims to valorize granite (GW) and basalt (BW) quarry waste powders as partial replacement (up to 20 wt.%) of iron-rich aluminosilicates in the synthesis of geopolymer binders. Both synthesized series of samples were sealed and cured at 7, 14, and 28 days at room temperature before subjecting to various analytical techniques, including the mechanical properties, XRD, FT-IR, TG/DTG, and SEM-EDS. The results showed that both GW and BW powders are efficient to produce sufficient amounts of geopolymer binder, with ensure good cohesion and connectivity between different components within the final matrices. The values of compressive strength were 7.5-35.9 MPa and 6.2-39.7 MPa for laterite/granite and laterite/basalt geopolymer composites, denoted LGA and LBA, respectively. Moreover, the coexistence of the amorphous Na-aluminosilicate, Ca-aluminosilicate, and Na-polyferrosialate species is responsible for the mechanical properties development of the end-products. Based on the findings, the selected quarry wastes appeared to be sustainable and cost-effective materials for the synthesis of low-energy consumption binder, suitable for the production of construction materials.
火山岩采石场的开采产生了大量废弃物，这引发了处置问题，导致采石场灰尘增多，并通过径流沉积在附近农场。为解决这一问题，需要开发在建筑行业中对其进行增值利用的可持续解决方案。本研究旨在将花岗岩（GW）和玄武岩（BW）采石场废粉作为富铁铝硅酸盐的部分替代品（最高20重量%）用于合成地质聚合物粘结剂。在进行包括力学性能、XRD、FT-IR、TG/DTG和SEM-EDS在内的各种分析技术测试之前，将合成的两组样品在室温下密封养护7天、14天和28天。结果表明，GW和BW粉末都能有效地生产出足够量的地质聚合物粘结剂，并确保最终基体中不同组分之间具有良好的内聚力和连通性。红土/花岗岩和红土/玄武岩地质聚合物复合材料（分别表示为LGA和LBA）的抗压强度值分别为7.5 - 35.9MPa和6.2 - 39.7MPa。此外，无定形钠铝硅酸盐、钙铝硅酸盐和钠聚铁硅铝酸盐物种共存是最终产品力学性能发展的原因。基于这些发现，所选的采石场废弃物似乎是用于合成低能耗粘结剂的可持续且具有成本效益的材料，适用于建筑材料的生产。
