Efficiency of Superplasticizers in Low‐carbon Alkali‐activated Slag–Silica Fume Binders Governed by Polymer Solubility
低炭素アルカリ活性化スラグ-シリカフュームバインダーにおける高性能減水剤の効率はポリマー溶解度に支配される (AI 翻訳)
Shengnan Sha, Kunlin Luo, Yuhui Lyu, Hailong Ye
🤖 gxceed AI 要約
日本語
本論文は、低炭素コンクリートの実現に向けて、アルカリ活性化バインダー（AAB）における高性能減水剤の性能を比較した。特に、K2CO3-KOH活性化スラグに対し、リグノスルホン酸塩（LS）とポリカルボン酸エーテル（PCE）の分散効果と強度発現を評価。PCEは低水結合材比で凝集し強度が低下するが、LSは安定した分散を維持し、後期強度を向上させることが示された。
English
This paper compares the performance of lignosulfonate (LS) and polycarboxylate ether (PCE) superplasticizers in alkali-activated binders (AABs) for low-carbon concrete. Using a K2CO3-KOH activation strategy, it finds that PCE shows solubility threshold at W/B~0.35, below which aggregation reduces strength, while LS maintains colloidal stability, enabling better dispersion and improved later-age strength. The study provides mechanistic guidance for admixture selection in ambient-cured AABs.
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
日本はセメント産業のCO2排出削減が急務であり、アルカリ活性化バインダーは有望な代替技術。本論文のLSの有効性は、低炭素コンクリート実用化に向けた材料選定の知見を提供する。
In the global GX context
Global construction sector seeks low-carbon alternatives to Portland cement. This study on alkali-activated binders with tailored superplasticizers contributes to the development of clinkerless concrete, relevant to decarbonization pathways and green building certification.
👥 読者別の含意
🔬研究者:Mechanistic insights on polymer solubility as key factor in superplasticizer performance for alkali-activated binders, guiding future additive design.
🏢実務担当者:Provides criteria for selecting superplasticizers in low-carbon concrete formulations, particularly for achieving workability without sacrificing strength.
📄 Abstract（原文）
ABSTRACT Workability control of alkali‐activated binders (AABs) remains an obstacle to producing low‐carbon clinkerless ultra‐high‐performance concrete, as their formulation usually necessitates low water‐to‐binder (W/B) ratios, high binder content, and concentrated activator solutions. To address this challenge, a greener and more manageable composite K 2 CO 3 –KOH activation strategy was adopted, and the performance of lignosulfonate (LS) and polycarboxylate ether (PCE) superplasticizers was systematically compared in K 2 CO 3 –KOH‐activated slag, with and without silica fume, across a range of W/B ratios. The results indicate that the performance differences between PCE and LS are primarily governed by their solubility. PCE exhibits an apparent solubility threshold near W/B ≈ 0.35 (0.74 M K 2 CO 3 and 1.22 M KOH), below which large‐scale aggregation suppressed effective dispersion, coarsened the pore‐entry structure, and reduced later‐age strength. In contrast, LS retained a stable soft‐colloidal state over the investigated activator concentrations, enabling more robust dispersion, pore refinement, and improved later‐age strength despite stronger early‐age retardation. These findings provide mechanistic guidance for admixture selection in ambient‐cured, low‐carbon AABs by identifying solution stability as a prerequisite for effective dispersion and strength development.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1111/jace.71065first seen 2026-07-30 05:28:29
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