Marathe Shriram, Nieświec Martyna, Gronostajska Barbara
Department of Materials Engineering and Construction Processes, Faculty of Civil Engineering, Wrocław University of Science and Technology, Politechnika Wrocławska 27, 50-370 Wrocław, Poland.
Department of Civil Engineering, NMAM Institute of Technology (NMAMIT), Nitte (Deemed to be University), Karkala 574110, Karnataka, India.
Materials (Basel). 2024 Dec 28;18(1):87. doi: 10.3390/ma18010087.
This research presents a proposal for alkali-activated permeable concrete composites with the use of industrial by-products, including ground granulated blast-furnace slag (GGBS) and waste-foundry sand, as well as agro-desecrate product, i.e., sugarcane bagasse ash (SBA). GGBS and SBA served as binders, with crushed granite as coarse aggregate and waste-foundry sand as fine aggregate. The novelty of this proposal is in examining the influence of SBA, in combination with slag, on the fresh- and hardened-state properties of the proposed permeable concretes. Experiments were conducted to optimize the SBA percentage based on hydraulic conductivity and compressive and tensile strength after 28 days of air curing. The hardened density, compaction factor (workability), and saturated water absorption were also measured for all the mixes. Furthermore, the control and optimal mixes were subjected to evaluate the microstructure analysis (EDX, XRD, and FESEM) after 28 days of air curing. The mix containing 100% GGBS and 0% SBA served as the reference, with the optimal 10% SBA mix (with 90% GGBS) used for comparative analysis to understand its effect on the properties of permeable composites. The results showed positive or acceptable mechanical performance at a mix ratio of 10% SBA to 90% GGBS as binders. This study aims to enhance the understanding of the engineering behavior of alkali-activated permeable composites, facilitating the rational design of permeable pavement systems through the effective use of agro-industrial waste products, thereby conserving ecosystems while meeting engineering requirements.
本研究提出了一种利用工业副产品制备碱激发透水性混凝土复合材料的方案，这些工业副产品包括磨细粒化高炉矿渣（GGBS）和铸造废砂，以及农业废弃物产品，即甘蔗渣灰（SBA）。GGBS和SBA用作胶凝材料，碎花岗岩作为粗骨料，铸造废砂作为细骨料。该方案的新颖之处在于研究SBA与矿渣相结合对所提出的透水性混凝土的新拌状态和硬化状态性能的影响。通过试验，根据空气养护28天后的渗透系数、抗压强度和抗拉强度来优化SBA的百分比。还测量了所有混合料的硬化密度、压实系数（工作性）和饱和吸水率。此外，对对照组和最佳混合料在空气养护28天后进行微观结构分析（能谱分析、X射线衍射分析和场发射扫描电子显微镜分析）。含100%GGBS和0%SBA的混合料作为参考，最佳的10%SBA混合料（含90%GGBS）用于对比分析，以了解其对透水性复合材料性能的影响。结果表明，以10%SBA与90%GGBS作为胶凝材料的混合料比例具有良好或可接受的力学性能。本研究旨在加深对碱激发透水性复合材料工程性能的理解，通过有效利用农业工业废弃物产品，促进透水性路面系统的合理设计，从而在满足工程要求的同时保护生态系统。
