Volkanik tüf atıklarından silika aerojel sentezi ve yüksek termal yalıtım özellikleri için alçı esaslı kompozitlerde değerlendirilmesi
Küçük Resim Yok
Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Bayburt Üniversitesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
İnşaat sektörü, en çok enerji tüketen ilk üç sektörden biridir. Yapı sektörü tarafından tüketilen enerjinin büyük bir kısmı (%51) ısıtma ve soğutma amaçlıdır. Yüksek enerji tüketimine yol açan, bu toplam enerjinin yaklaşık %70'inin bina zarfında kaybolmasıdır. Bu nedenle yapı sektörünün enerji tüketimini ve nispi karbondioksit emisyonunu azaltmak amacıyla inşaat sektörü, yüksek ısı yalıtım özelliklerine sahip yapı malzemeleri üretimi ile ilgili araştırmalara ilgi duymuştur. Bu kapsamda, mevcut çalışmada uygun fiyatlı Silika Aerojel, sol-jel yöntemi ve ortam basınçlı kurutma kullanılarak volkanik tüf atıklarından sentezlenmiştir. Sentezlenmiş Silika Aerojel tozunun yapısal ve morfolojik özellikleri XRD ve BET analizleri kullanılarak incelenmiştir. Silika Aerojel alçı esaslı kompozitlerin mekanik, fiziksel ve ısıl iletkenlik özellikleri uygun standartlara göre belirlenmiştir. Bu çalışma sonucunda, istenen özelliklere sahip Silika Aerojelin, sol-jel yöntemi ve ortam sıcaklığında kurutma kullanılarak volkanik tüf atıklarından başarıyla sentezlenebileceği tespit edilmiştir. Bu çalışma sonucunda, istenen özelliklere sahip Silika Aerojelin, sol-jel yöntemi ve ortam sıcaklığında kurutma kullanılarak volkanik tüf atıklarından başarıyla sentezlenebileceği tespit edilmiştir. Sentezlenen Silika Aerojelin, 662,9876 m2/g BET yüzey alanına ve 0,9096 cm3/g toplam gözenek hacmine sahip olduğu belirlendi. Ayrıca, sentezlenmiş Silika Aerojel tozunun sıvaya (hacimce %50) katılmasının, 0,76 g/cm3 kadar düşük bir yoğunluğa, 0,069 W/mK kadar düşük bir ısıl iletkenlik değerine ve 1,22 MPa'lık bir basınç dayanımı değerine sahip kompozitler ile sonuçlandığı bulunmuştur.
The building sector is one of the top three highest energy consuming sectors. A great part of the energy consumed by the building sector (at 51%) serves the purposes of heating and cooling. Leading to high energy consumption is the fact that about 70% of this total energy is lost through the building envelope. Hence with the aim of reducing the energy consumption of the building sector and its relative carbon dioxide emission, the construction sector has been interested in researches on the production of construction materials having high thermal insulating properties. In this scope, affordable silica aerogel was synthesized from volcanic tuff wastes by employing a sol-gel method and ambient pressure drying in the present study. The potential usability of the as-synthesized silica aerogel powder in the construction sector for the production of construction materials with enhanced thermal insulation properties was investigated by incorporating it into plaster based composites at various vol % ratios (25%, 50% and 75%). structural and morphological properties of the as-synthesized silica aerogel powder were investigated using XRD and BET analyses. Mechanical, physical and thermal conductivity properties of silica aerogel plaster based composites were determined in accordance to suitable standards. As a result, it was determined that silica aerogel having desired properties can be successfully synthesized from volcanic tuff wastes by employing sol-gel method and ambient temperature drying. The as-synthesized silica aerogel was determined to have a BET surface area of 662,9876 m2/g and a total pore volume of 0,9096 cm3/g. It was found that the incorporation of the as synthesized silica aerogel powder into plaster (at 50 vol%) resulted in composites with a density as low as 0,76 g/cm3, thermal conductivity value as low as 0,069 W/mK and compressive strength value as low as 1,22 MPa.
The building sector is one of the top three highest energy consuming sectors. A great part of the energy consumed by the building sector (at 51%) serves the purposes of heating and cooling. Leading to high energy consumption is the fact that about 70% of this total energy is lost through the building envelope. Hence with the aim of reducing the energy consumption of the building sector and its relative carbon dioxide emission, the construction sector has been interested in researches on the production of construction materials having high thermal insulating properties. In this scope, affordable silica aerogel was synthesized from volcanic tuff wastes by employing a sol-gel method and ambient pressure drying in the present study. The potential usability of the as-synthesized silica aerogel powder in the construction sector for the production of construction materials with enhanced thermal insulation properties was investigated by incorporating it into plaster based composites at various vol % ratios (25%, 50% and 75%). structural and morphological properties of the as-synthesized silica aerogel powder were investigated using XRD and BET analyses. Mechanical, physical and thermal conductivity properties of silica aerogel plaster based composites were determined in accordance to suitable standards. As a result, it was determined that silica aerogel having desired properties can be successfully synthesized from volcanic tuff wastes by employing sol-gel method and ambient temperature drying. The as-synthesized silica aerogel was determined to have a BET surface area of 662,9876 m2/g and a total pore volume of 0,9096 cm3/g. It was found that the incorporation of the as synthesized silica aerogel powder into plaster (at 50 vol%) resulted in composites with a density as low as 0,76 g/cm3, thermal conductivity value as low as 0,069 W/mK and compressive strength value as low as 1,22 MPa.
Açıklama
Lisansüstü Eğitim Enstitüsü, İnşaat Mühendisliği Ana Bilim Dalı
Anahtar Kelimeler
İnşaat Mühendisliği, Civil Engineering
