フライアッシュベースのジオポリマーコンクリートの機械的性質と耐久性に及ぼすアルカリ活性化剤の影響
Effect of Alkali Activators on Mechanical and Durability Properties of Fly Ash based Geopolymer Concrete (原題)
Abhishek Vijay Jadhav, V. Bogar
🤖 gxceed AI 要約
日本語
本研究は、普通ポルトランドセメント（OPC）の代替としてフライアッシュベースのジオポリマーコンクリート（GPC）を評価し、NaOHとNa₂SiO₃の比率が強度と耐久性に与える影響を調べた。80℃の熱養生により初期強度が向上し、特に0.5:1の配合で顕著だった。OPCと比較して28日強度はやや低いものの、機械的特性は同等で、透水性が低く、ジオポリマー化が確認された。
English
This study evaluates fly ash-based geopolymer concrete (GPC) as an alternative to ordinary Portland cement (OPC), examining the effect of NaOH and Na2SiO3 ratios on strength and durability. Heat curing at 80°C significantly improved early-age strength, especially for the 0.5:1 mix. Although 28-day strength was slightly lower than OPC, mechanical performance was comparable, with lower water penetration and evidence of successful geopolymerization.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本の建設業界では、カーボンニュートラルに向けてセメント代替材料の需要が高まっており、本研究成果は低炭素コンクリートの実用化に寄与する可能性がある。ただし、日本特有の規制や市場状況への直接的な言及はなく、一般的な材料研究として位置づけられる。
In the global GX context
Globally, the construction sector faces pressure to reduce carbon emissions, and geopolymer concrete offers a promising low-carbon alternative. This study provides empirical data on mix design and performance, contributing to the growing body of knowledge on sustainable construction materials, though it does not address specific policy frameworks like CSRD or ISSB.
👥 読者別の含意
🔬研究者:Provides experimental data on geopolymer concrete mix design and performance, useful for further optimization and lifecycle assessment studies.
🏢実務担当者:Offers insights into alternative cementitious materials that could reduce carbon footprint in construction projects, though scalability and cost need consideration.
📄 Abstract（原文）
The production of ordinary Portland cement (OPC) is one of the major sources of carbon dioxide emissions in the construction industry, creating a need for more sustainable building materials. Fly ash-based geopolymer concrete (GPC) has emerged as a promising alternative because it can reduce environmental impact while providing good engineering performance. This study examines how different proportions of sodium hydroxide (NaOH) and sodium silicate (Na₂SiO₃) affect the strength and durability of GPC compared with conventional OPC concrete. Initial trials using NaOH:Na₂SiO₃ ratios of 1:0.5 and 0.5:1 were conducted to identify a suitable curing condition. The main investigation was then carried out using geopolymer mixes with activator ratios of 1:1 and 0.5:1, all oven-cured at 80°C, with OPC concrete used as the control mix. Compressive, split tensile, flexural, shear, and pull-out strengths were evaluated using Indian Standard methods, while durability was assessed through water penetration and X-ray diffraction (XRD) tests. The results showed that heat curing significantly improved early-age strength, especially for the 0.5:1 mix. Although OPC concrete achieved slightly higher 28-day strength, the geopolymer mixes showed comparable mechanical performance, lower water penetration, and clear evidence of successful geopolymerization.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.22214/ijraset.2026.84664first seen 2026-08-30 05:24:56 · last seen 2026-09-22 05:13:15
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