Geopolymers as sustainable alternates for portland cement in constructive concrete: systematic review

Alexandria Journal of Science and Technology Pub Date : 2024-07-22 DOI:10.21608/ajst.2024.290876.1032

H.A Fetouh

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Abstract

: This systematic review presenting fundamentals of geopolymer (GP) for concrete technology. Geopolymer formulated by activation of sustainable aluminosilicate (minerals) binders (eco-friendly, available, cheap, sustainable natural raw materials fly ash and slag wastes). Geopolymer concrete decrease scarcity of global ordinary Portland cement and decrease energy 0.110 kWh per gram and CO 2(g) emission (800 kg ton -1 ). Durability, mechanical strength, resistance to water and leaching improved via by TiO 2 nanoparticles as nanofiller. Polycondensation yield and physicochemical characteristics of GP are monotonic functions of (binder's chemistry, alkali concentration& types, reinforcing fibers, Si to Al ratio, precursors firing, types of solid wastes, heating activation, types and curing conditions. Concrete quality is controlled by geopolymer (composition, additives, mechanical strength and compressive strength). Nano fillers materials SiO 2 , Fe 2 O 4 and Al 2 O 3 improved (mechanical characteristics, microstructure, functionality, durability, mortar strength, slurry mobility, permeability, impact

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土工聚合物在构造混凝土中作为硅酸盐水泥的可持续替代品：系统综述

:这篇系统性综述介绍了混凝土技术中土工聚合物（GP）的基本原理。土工聚合物通过活化可持续的铝硅酸盐（矿物）粘结剂（生态友好、可用、廉价、可持续的天然原料粉煤灰和矿渣废料）配制而成。土工聚合物混凝土减少了全球普通硅酸盐水泥的稀缺性，并降低了每克 0.110 千瓦时的能耗和二氧化碳排放量（800 千克/吨-1）。纳米填充物 TiO 2 纳米颗粒提高了混凝土的耐久性、机械强度、耐水性和耐沥滤性。土工聚合材料的缩聚率和理化特性与下列因素有关：粘结剂的化学成分、碱的浓度和类型、增强纤维、硅铝比、前驱体的烧制、固体废弃物的类型、加热活化、类型和固化条件。混凝土质量由土工聚合物（成分、添加剂、机械强度和抗压强度）控制。纳米填充材料 SiO 2、Fe 2 O 4 和 Al 2 O 3 改善了混凝土的机械特性、微观结构、功能性、耐久性、砂浆强度、泥浆流动性、渗透性、抗冲击性和耐久性。

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Alexandria Journal of Science and Technology

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