Strength and Workability Characteristics of Concrete Using Recycled Plastic Waste for Sustainable Construction
リサイクルプラスチック廃棄物を用いたコンクリートの強度と施工性特性：持続可能な建設のために (AI 翻訳)
Israt Jahan Reana, J. Oti, B. Adeleke
🤖 gxceed AI 要約
日本語
本研究は、リサイクルプラスチック廃棄物を天然骨材の部分代替としてコンクリートに用いる可能性を調査。15%代替までは強度を維持するが、それ以上では強度低下。作業性は向上し、水吸収は低代替率で低減。LCAではCO2削減効果は限定的だが、資源保全と廃棄物削減に貢献。
English
This study investigates partial replacement of coarse aggregates with recycled plastic waste in concrete. Up to 15% replacement maintains strength, while higher levels reduce it. Workability improves, and low replacement reduces water absorption. LCA shows limited CO2 reduction but benefits in resource conservation and waste diversion.
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、コンクリート骨材の枯渇や廃プラスチック処理が課題。本研究成果は、一定量のプラスチック代替が強度を維持しつつ資源循環に寄与する可能性を示しており、日本の建設リサイクル政策やグリーン購入法に示唆を与える。
In the global GX context
Globally, the construction sector seeks sustainable materials to reduce natural resource depletion. This paper demonstrates that limited plastic waste replacement in concrete is feasible without sacrificing strength, aligning with circular economy principles and waste management goals. However, the lack of significant CO2 reduction limits its direct climate impact.
👥 読者別の含意
🔬研究者:Provides experimental data on mechanical and durability properties of plastic-waste concrete, useful for further optimization studies.
🏢実務担当者:Offers practical guidance for concrete mix design using recycled plastics, particularly at 15% replacement for structural applications.
🏛政策担当者:Supports policies that incentivize use of recycled plastics in construction, but notes limitations in strength at higher replacement levels.
📄 Abstract（原文）
The increasing amount of recycled plastic waste and the extensive use of construction materials both contribute significantly to CO2 emissions, a major global concern. This study investigates the use of recycled plastic waste (PW) as a partial replacement for natural 4/10 mm coarse aggregates in concrete mix design, aiming to promote sustainable construction practices. Concrete mixes were prepared with varying levels of plastic replacement—0%, 15%, 30%, 45%, and 60% by volume—and evaluated for workability, compressive strength, tensile strength, water absorption, and microstructural properties. Results indicated that replacing aggregates with PW increased slump values, suggesting improved workability, particularly at 30–45% replacement. However, both compressive and tensile strengths exhibited a declining trend as the replacement level increased. The standard strength was maintained only at 15% replacement, achieving 35.3 MPa at 56 days compared to 37.3 MPa for the control mix. Durability tests showed reduced water absorption at low replacement levels but significant porosity and microcracking at higher percentages. Scanning Electron Microscopy (SEM) revealed weak interfacial transition zones (ITZs) between plastic waste and cement paste, with bonding weakening and micro voids increasing as replacement levels rose. A simplified life cycle assessment (LCA) suggests that while CO2 emissions remain largely unchanged due to cement dominance, incorporating recycled plastic waste provides sustainability benefits through resource conservation and waste diversion rather than direct carbon reduction. These findings highlight that limited aggregate replacement with plastic waste can be practical, cost-efficient, and environmentally advantageous. This research underscores the potential of recycled plastics in sustainable construction, contributing to waste management and reducing reliance on natural aggregates.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.3390/su18041831first seen 2026-06-29 07:31:25
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