Effect of high SCM content and limestone addition on early-age strength and hydration kinetics of low-carbon binders
高SCM含有量と石灰石添加が低炭素結合材の初期強度と水和動力学に与える影響 (AI 翻訳)
Muhammad Umer, Anna Antonova, Jouni Punkki
🤖 gxceed AI 要約
日本語
本研究は、高SCM含有量と石灰石添加が低炭素結合材の初期（3日）強度と水和動力学に及ぼす影響を調査。アイスランド産火山性ポゾラン、フライアッシュ、スラグを比較し、SCMの粒子の細かさが強度発現に重要であることを示した。石灰石添加はクリンカの水和を促進するが、SCMによる強度低下を補うには不十分な場合があった。
English
This study investigates the effect of high supplementary cementitious material (SCM) content and limestone addition on early-age (3 days) hydration kinetics and strength development of low-carbon binders. Comparing volcanic pozzolan from Iceland, fly ash, and slag, it finds that SCM fineness is crucial for early strength. Limestone addition accelerates clinker hydration but may not fully compensate for strength loss due to dilution with certain SCMs.
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
日本ではセメント産業の脱炭素化が急務であり、高炉スラグやフライアッシュの活用が進むが、初期強度不足が課題。本研究は、代替SCMとしての火山性ポゾランの可能性を示しており、日本の建設分野での低炭素結合材開発に示唆を与える。
In the global GX context
Globally, the cement industry faces pressure to reduce CO2 emissions, and high-SCM binders are a key strategy. This paper provides mechanistic insights into early-age strength development, critical for practical adoption. The comparison of different SCMs, including a novel volcanic pozzolan, offers guidance for material selection in various regions.
👥 読者別の含意
🔬研究者:Provides experimental data on hydration kinetics and strength correlation for various SCMs, aiding in binder design.
🏢実務担当者:Offers insights on SCM fineness and limestone addition effects for optimizing low-carbon concrete mix designs.
📄 Abstract（原文）
A slow development of early strength remains a major issue associated with low-carbon binders. This study investigated the effect of high supplementary cementitious material (SCM) content and limestone addition on the early-age (3 days) hydration kinetics and strength development using isothermal calorimetry, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, and compressive strength tests. The properties of volcanic pozzolan from Iceland (VPI), a newly emerged natural SCM in the Nordics, were compared with those of fly ash and slag. The results indicated the fineness of SCMs grains as an important factor affecting the early strength development of corresponding binders, along with the intrinsic chemical structure of SCMs. The highest strength and heat release was exhibited by the binder with 40% VPI (the finest SCM) for the first 3 days, which was surpassed after 3 days by the binder with 40% slag. Binders with fly ash showed slow strength gain due to coarse fly ash particles with non-reactive crystalline phases. The addition of limestone increased the rate of clinker hydration. However, this was not sufficient to compensate for the strength loss by dilution in binders with slag and VPI, while the strength of the binder with fly ash remained intact with limestone addition. Different types of SCMs were observed to affect the slope of linear correlation between the heat of hydration and compressive strength at early age.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.cscm.2026.e06200first seen 2026-06-07 04:57:47
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