Toward Carbon-neutral Concrete: Early Age Strength of Mechanically Activated Construction and Demolition Waste-based Binders
カーボンニュートラルコンクリートへの道：機械的に活性化された建設解体廃棄物ベースバインダーの初期強度 (AI 翻訳)
C. Ngandu, G. Mucsi
🤖 gxceed AI 要約
日本語
建設廃棄物（CDW）を機械的活性化（MA）処理することで、セメント代替バインダーとしての初期強度が向上することを実証。最適なCDW置換率は25%で、最大圧縮強度67MPaを達成。MA処理によるSi反応性向上とフィラー効果が強度発現に寄与。水セメント比や粒度が強度に影響。
English
This study demonstrates that mechanical activation (MA) of construction and demolition waste (CDW) improves early-age compressive strength as a cement substitute. The optimal replacement of cement with MA CDW is 25%, achieving up to 67 MPa. Strength enhancement is attributed to increased Si reactivity and filler effect. Water-to-binder ratio and particle size influence strength.
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
日本では建設廃棄物のリサイクル率は高いが、高付加価値利用は限定的。本研究成果は、CDWをCO2排出削減に寄与する低炭素コンクリート材料として活用する道を示し、SSBJやGX実現に向けた建設分野のグリーン化に資する。
In the global GX context
Globally, concrete production accounts for ~8% of CO2 emissions. This paper offers a pathway to carbon-neutral concrete by upcycling construction waste, aligning with circular economy principles and net-zero targets. It provides empirical data on mechanical activation as a scalable technique for low-carbon binders.
👥 読者別の含意
🔬研究者:Provides a methodology for mechanical activation of CDW and its effect on compressive strength, useful for further optimization of low-carbon cement alternatives.
🏢実務担当者:Demonstrates that 25% CDW replacement can achieve high strength, offering a viable approach for reducing cement use in precast concrete products.
🏛政策担当者:Supports policies promoting construction waste valorization and low-carbon building materials, aligning with national decarbonization strategies.
📄 Abstract（原文）
There is need to research and develop sustainable building materials from waste and by-products with adequate standards for increasing infrastructural and environmental need occasioned by population increase, modernization, urbanization, environmental and climatic changes concern currently. In unprocessed form it is not possible to up-cycle concrete waste, therefore mechanical activation (MA) technique can be applied to up-cycle waste, through improvement of properties for secondary raw materials.This study focuses on effect of early age compressive strength and MA of construction and demolition waste (CDW) hence advocacy for carbon neural concrete.MA improved the early age strengths of CDW based binder strengths. The finer CDW samples had better strength at 7 days compared to coarser. Generally, reduction of water to binder (w/b) ratio resulted to higher pozzolanic activity index for binders with 25% CDW. The 25% cement replacement with MA CDW as binder replacement was optimum, with highest respective compressive strengths of 67.02 ± 1.56 MPa and 62.82 ± 12.15 MPa, for ranges 5303–8440 cm2/g (average 6872 cm2/g) and 12,102–10,327 cm2/g (average 11214 cm2/g) geometric specific surface areas based CDW's binders respectively.Remarkable strength for MA of CDW could be due to a combination of impact of Si reactivity and filler effect in the CDW. Water content, particle sizes and carbonation had an impact on compressive strengths for binder materials. Inconsistency in particle sizes from different batches was possibly due to the quartz amount.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.3311/ppci.42510first seen 2026-06-29 06:45:25
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。