Circular Economy for Climate-Resilient and Sustainable Construction

Öz

This study develops an integrated framework for applying Circular Economy (CE) strategies in climate-resilient construction, drawing on empirical evidence from four international case studies: the Netherlands, United Kingdom, Japan, and Australia. Through Lifecycle Assessment (LCA), Material Flow Analysis (MFA), and Net Present Value (NPV) modeling, the research quantifies CE performance across planning, design, execution, and post-use phases. Key findings show that CE practices—such as modular construction, selective demolition, recycled aggregate use, and geopolymer concrete substitution—achieved carbon reductions of 20–40%, material recovery rates of 45–80%, and lifecycle cost savings between €500,000 and €1.2 million. Additionally, CE-aligned interventions enhanced climate resilience, evidenced by a 25% reduction in flood risk and a 20% increase in infrastructure lifespan. Results indicate that governance capacity, digital tool deployment, and material recovery infrastructure are critical enablers of CE performance. The proposed framework offers a replicable, lifecycle-based approach for aligning environmental and economic goals, enabling construction systems to simultaneously decarbonize and adapt to escalating climate pressures.

Anahtar Kelimeler

• Circular Economy in Construction
• Climate-Resilient Infrastructure
• Sustainable Construction Strategies
• Lifecycle Assessment (LCA)
• Material Recovery and Waste Minimization

İklim Dirençli ve Sürdürülebilir Yapılaşma için Döngüsel Ekonomi Yaklaşımı

Öz

Bu çalışma, Döngüsel Ekonomi (DE) stratejilerinin iklim dirençli inşaat uygulamalarına entegrasyonunu amaçlayan bütüncül bir çerçeve geliştirmekte ve Hollanda, Birleşik Krallık, Japonya ve Avustralya’dan dört uluslararası örnek olay üzerinden elde edilen ampirik kanıtları temel almaktadır. Yaşam Döngüsü Değerlendirmesi (LCA), Malzeme Akış Analizi (MFA) ve Net Bugünkü Değer (NPV) modellemesi kullanılarak, planlama, tasarım, uygulama ve kullanım sonrası aşamalar boyunca DE uygulamalarının performansı nicel olarak değerlendirilmiştir. Bulgular, modüler inşaat, seçici yıkım, geri dönüştürülmüş agrega kullanımı ve jeopolimer beton ikamesi gibi DE uygulamaları sayesinde karbon salımında %20–40 oranında azalma, %45–80 arasında malzeme geri kazanımı ve proje başına €500.000 ile €1.200.000 arasında yaşam döngüsü maliyet tasarrufu sağlandığını göstermektedir. Ayrıca, DE uyumlu müdahalelerin %25 oranında sel riski azalması ve %20 oranında altyapı ömrü artışı ile iklim dayanıklılığını güçlendirdiği tespit edilmiştir. Yönetişim kapasitesi, dijital araçların kullanımı ve malzeme geri kazanım altyapısı, DE performansının başlıca belirleyicileri olarak öne çıkmaktadır. Önerilen çerçeve, çevresel ve ekonomik hedeflerin birlikte gerçekleştirilmesine olanak tanıyan, yaşam döngüsü temelli ve tekrarlanabilir bir yaklaşım sunarak inşaat sistemlerinin hem karbon azaltımına hem de artan iklim baskılarına uyumuna katkı sağlamaktadır.

Anahtar Kelimeler

• İnşaat Sektöründe Döngüsel Ekonomi
• İklim Dirençli Altyapı
• Sürdürülebilir Yapılaşma Stratejileri
• Yaşam Döngüsü Değerlendirmesi (LCA)
• Malzeme Geri Kazanımı ve Atık Minimizasyonu

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