将废物转化为可持续建筑材料:使用再生混凝土骨料的土工聚合物混凝土的性能和环境影响

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摘要

胶凝材料或集料等工业副产品有可能减轻传统水泥生产对环境造成的不利影响。土工聚合物混凝土(GPC)比传统混凝土更环保,因为它不需要水泥。含有再生混凝土集料(RCA)、磨细高炉矿渣(GGBS)和粉煤灰(FA)的 GPC 可减少原材料的使用,并创建可持续的基础设施。GPC 复合物提高了工作性,坍落度值高于标准混凝土,并减少了用水量。本研究考察了不同 RCA 含量下 GPC 的机械性能、耐久性和环境性能。M30 混凝土的混合设计是通过试验确定的,水/粘合剂比率为 0.45。含 0%、10%、20%、30%、40% 和 50% 再生粗骨料的 GPC 按质量取代了天然骨料(NA)。含 50% GGBS 的 GPC 在第七天的早期强度为正常抗压强度的 96%。用 RA 替代 NA 达 40% 时,抗压强度、劈裂拉伸强度和抗弯强度都有显著提高。这些结果凸显了 GPC 作为建筑领域可持续替代材料的潜力。
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Transforming waste into sustainable building materials: Properties and environmental impacts of Geopolymer concrete with recycled concrete aggregates
Industrial by-products such as cementitious materials or aggregates have the potential to mitigate the adverse environmental effects associated with traditional cement manufacture. Geopolymer Concrete (GPC) is more eco-friendly than conventional concrete because it does not require cement. GPC with Recycled concrete aggregates (RCA), Ground granulated blast furnace slag (GGBS), and Fly Ash (FA) reduce raw material use and create sustainable infrastructure. GPC compounds increase workability, slump value above standard concrete, and reduce the amount of water usage. The study examines GPC mechanical properties, durability, and environmental properties with different RCA content. The M30 concrete mix design is established by trial and error utilizing a 0.45 water/binder ratio. GPC with 0%, 10%, 20%, 30%, 40%, and 50% recycled coarse aggregate replaced natural aggregate(NA) by mass. GPC with 50% GGBS provides an early strength of 96% of normal compressive strength on day seven. The compressive, split tension, and flexural strengths exhibit significant improvement with up to a 40% substitution of NA with RA. These results highlight GPC's potential as a sustainable alternative in the construction sector.
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