Shrinkage investigation of sustainable concrete with different binders
異なる結合材を用いた持続可能なコンクリートの収縮調査 (AI 翻訳)
Audrius Grinys, Algirdas Algirdas Augonis, Ernestas Ivanauskas, Darija Urbonaitė
🤖 gxceed AI 要約
日本語
本研究は、セメントのクリンカ含有量を減らすことでCO2排出削減に貢献する持続可能なコンクリートの収縮特性を調査した。異なる結合材（CEM I, CEM II等）を用いたコンクリートの初期乾燥収縮を測定し、ポゾランを含む結合材で収縮が増大することを発見した。この知見は低炭素コンクリートの実用化に重要である。
English
This study investigates shrinkage of sustainable concrete using different binders to reduce clinker content and CO2 emissions. It found that concretes with pozzolanic binders (CEM II/B-M(P-LL) and CEM II/A-P) exhibit higher early and drying shrinkage compared to control. This insight is crucial for developing low-carbon concrete for construction.
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CO2削減が急務であり、代替結合材を用いた低炭素コンクリートの開発が進んでいる。本論文で報告された収縮特性は、日本のインフラや建築での実用化に向けた課題を示しており、材料選定や施工方法の改善に役立つ。
In the global GX context
Globally, cement decarbonization is a key challenge for climate targets. This paper provides data on the shrinkage performance of alternative binders, which is essential for scaling low-carbon concrete in construction. It contributes to the knowledge base for reducing embodied carbon in the built environment.
👥 読者別の含意
🔬研究者:Provides experimental data on shrinkage of concrete with alternative binders, useful for materials science research on low-carbon construction.
🏢実務担当者:Offers insights into potential shrinkage issues when using pozzolanic cements, aiding in mix design and quality control for sustainable concrete.
📄 Abstract（原文）
Concrete is the most used building material in the world, with production increasing year on year. It plays a significant role in modern construction due to its versatility in shaping, durability, and cost-effectiveness. However, the production of cement used for concrete is highly polluting due to the large amount of carbon dioxide emitted into the atmosphere. The aim is therefore to use sustainable concrete, for which the cement used is supplemented with a certain amount of additives or substitutes to reduce the clinker content. One such additive is the natural local puzzolana – opoka. Such concrete with opoka cement has the property of having higher shrinkage deformations at an early age, leading to cracks and fissures. To overcome this problem, chemical admixtures or other additives are used in concrete production to reduce the shrinkage of the concrete. The aim of the research is to investigate the effect of concretes with different binders (control CEM I 42,5 R, CEM II/A-P 52,5N, CEM II/B-M (P-LL) 42,5N, CEM II/A-LL 42,5 R) on the properties of fresh and hardened concrete. The focus is on the study of early and drying concrete shrinkage. After performing a shrinkage test, it was found that early shrinkage (till 1 day) concretes with CEM II/B-M(P-LL) 42,5N and CEM II/A-P 52,5N type binders reached more shrinkage than the control concrete, respectively. Also, within the first 24 hours after casting the samples, it was observed that both samples with pozzolans in their binder composition after approximately 6 hours have a shrinkage curve jump, i.e. a sudden increase in shrinkage. This happens probably due to natural puzzolana porosity which after some period released free water. After 14 days of hardening, it was found that concretes with CEM II/B-M (P-LL) 42,5N and CEM II/A-P 52,5N type binders reached 34 % and 5 % more shrinkage than the control concrete, respectively.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.71167/uaceg.2026.590118first seen 2026-06-29 07:12:55
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