Low-Carbon Autoclaved Alkali-Activated Blast Furnace Slag Concrete: Microstructure and Mechanical Properties
低炭素オートクレーブ養生アルカリ活性化高炉スラグコンクリート：微細構造と力学特性 (AI 翻訳)
Carlos Rodríguez, Pablo Gómez, Felipe Martí, Sumit Srivastava, Marina Sánchez, Fernando Fernández, Irene Beleña, Míriam Hernández, A. Arizzi
🤖 gxceed AI 要約
日本語
本論文は、高炉スラグ（BFS）とカルシウムカーバイドスラグ（CCS）を用いて、普通ポルトランドセメント（OPC）を部分的または完全に置換した低炭素オートクレーブコンクリート（AC）の微細構造、鉱物学的特性、力学特性を評価した。14の配合を検討し、X線回折、圧縮強度、ライフサイクルアセスメント（LCA）を実施。OPCを除去することでCO2排出量を44%削減しつつ、同等の力学性能を達成した。
English
This paper presents microstructural, mineralogical, and mechanical study of low-carbon autoclaved concrete (AC) by partially or fully replacing ordinary Portland cement (OPC) with ground-granulated blast furnace slag (BFS) and substituting lime with calcium carbide slag (CCS). Fourteen mixes were evaluated. Results show that OPC-free mixes achieve similar mechanical performance while reducing total CO2 emissions by 44% in life-cycle assessment.
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、セメント生産に起因するCO2排出削減が喫緊の課題。本研究成果は、高炉スラグやカルシウムカーバイドスラグといった産業副産物を活用することで、SSBJのグリーン建材基準や建設分野の脱炭素目標に貢献できる可能性を示す。
In the global GX context
This research directly addresses the high embodied carbon of cement production. For global GX, it demonstrates a scalable path to low-carbon concrete using industrial by-products, aligning with ISSB/CSRD reporting on construction material emissions and transition finance for green building materials.
👥 読者別の含意
🔬研究者:Novel combination of BFS and CCS in autoclaved concrete with detailed microstructural characterization and LCA.
🏢実務担当者:Construction companies can adopt OPC-free concrete formulations for precast products, reducing Scope 3 emissions from materials.
🏛政策担当者:Supports policies promoting industrial symbiosis and low-carbon building codes by showing large CO2 reduction potential without performance loss.
📄 Abstract（原文）
This paper presents a microstructural, mineralogical, and mechanical study of low-carbon autoclaved concrete (AC), achieved by partially or fully replacing ordinary Portland cement (OPC) with ground-granulated blast furnace slag (BFS) and substituting lime with calcium carbide slag (CCS). Fourteen mixes were produced and evaluated in the green state and after autoclaving. Quantitative X-ray diffraction (XRD) using the Rietveld method, density, compressive strength, and life cycle assessment (LCA) were conducted. Results show that mixes containing BFS achieve green strengths equal to or higher than the OPC reference, ensuring integrity during autoclaving. Using BFS with an adequate calcium supply promotes the formation of pre-autoclave portlandite, which in turn favors tobermorite development and yields post-autoclave strengths comparable to the OPC reference. Partial lime replacement with CCS (50%) maintains mineralogy and strength, whereas excessive CCS may reduce available portlandite and lower strength. Life-cycle assessment indicates that raw material supply dominates emissions and that removing OPC cuts total CO2 by 44% without compromising mechanical performance. These findings demonstrate the feasibility of OPC-lean/OPC-free, lime-optimized autoclaved concretes with substantially lower embodied impacts.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.3390/app16031178first seen 2026-06-29 07:11:07
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