INVESTIGATION OF PHYSICAL, MECHANICAL AND THERMAL PROPERTIES OF MINERAL ADMIXED AUTOCLAVED FOAM CONCRETE

Öz

In this study, the aim was to develop a non-combustible, economical, and entirely domestically sourced and technology-based autoclaved foam concrete thermal insulation material. In autoclaved foam concrete (AFC) with a density of 300 kg/m3, which meets thermal insulation material standards, the density, capillary water absorption coefficient, compressive and flexural strengths, ultrasonic pulse velocity, dynamic modulus of elasticity, thermal conductivity, and the mineralogical properties of hydration products based on XRD of some silica-based mineral additives (fly ash, amorphous silica, and metakaolin) substituted at different ratios (5%, 10%, and 15%) for cement were investigated. Autoclaving improved the physico-mechanical properties of mineral-added foam concrete. Among the mineral additives, the highest strength values were obtained in the foam concrete with 5% metakaolin, while the lowest thermal conductivity and capillary water absorption values were obtained in the foam concrete with 5% fly ash. The study concluded that autoclaving is highly effective in producing a sustainable thermal insulation material in foam concrete.

Anahtar Kelimeler

• Foam Concrete
• Autoclaving
• Mineral Admixture
• Physical and Mechanical Properties
• Thermal Properties

MİNERAL KATKILI OTOKLAVLANMIŞ KÖPÜK BETONUN FİZİKSEL, MEKANİK VE TERMAL ÖZELLİKLERİNİN İNCELENMESİ

Öz

Bu çalışmada, yanmaz, ekonomik ve tamamen yerli kaynaklara ve teknolojiye dayalı bir otoklavlanmış köpük beton ısı yalıtım malzemesi geliştirilmesi amaçlanmıştır. Isı yalıtım malzemesi standartlarını karşılayan 300 kg/m3 yoğunluklu otoklavlanmış köpük betonda (AFC) çimento ile farklı oranlarda (%5, 10 ve 15) ikame edilen silika esaslı bazı mineral katkıların (uçucu kül, amorf silika ve metakaolin) yoğunluk, kılcal su emme katsayısı, basınç ve eğilme dayanımları, ultrasonik darbe hızı ve dinamik elastisite modülü, ısı iletkenliği, XRD esaslı hidratasyon ürünlerinin mineralojik özellikleri incelenmiştir. Otoklavlama, mineral katkılı köpük betonun fiziko-mekanik özelliklerini iyileştirmiştir. Mineral katkılar arasında en yüksek dayanım değerleri %5 metakaolin katkılı köpük betonda elde edilirken, en düşük ısı iletkenliği ve kapiler su emme değerleri %5 uçucu kül katkılı köpük betonda elde edilmiştir. Çalışmada, otoklavlamanın sürdürülebilir ısı yalıtım malzemesi köpük beton elde edilmesinde oldukça etkili olduğu sonucuna varılmıştır.

Anahtar Kelimeler

• Köpük Beton
• Otoklavlama
• Mineral Katkı
• Fiziksel ve Mekanik Özellikler
• Termal Özellikler

Kaynakça

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