Natural pozzolan-based green geopolymer foam for thermal insulation

Barış, Kübra Ekiz; TANACAN, LEYLA

doi:10.47481/jscmt.1142100

Natural pozzolan-based green geopolymer foam for thermal insulation

Kübra EKİZ BARIŞ, (İstanbul Teknik Üniversitesi, Mimarlık Bölümü, İstanbul, Türkiye)

LEYLA TANACAN (İstanbul Teknik Üniversitesi, Mimarlık Bölümü, İstanbul, Türkiye)

Journal of sustainable construction materials and technologies (Online)

2 0

Yıl: 2022 Cilt: 7 Sayı: 3 Sayfa Aralığı: 128 - 144 Metin Dili: İngilizce DOI: 10.47481/jscmt.1142100 İndeks Tarihi: 05-10-2022

Natural pozzolan-based green geopolymer foam for thermal insulation

Öz:

The current study investigates the possibility of volcanic Tuff of Earth of Datça (ED) in Turkey to be used as an aluminosilicate source in producing a geopolymer foam for thermal insula- tion. An extensive evaluation of the effects of fine sand–to–pozzolan and Al powder–to–poz- zolan ratios on the physical, mechanical, and thermal properties and morphology (porosity, average and maximum pore diameter, pore size distribution) of the pores were carried out. The sodium silicate and potassium hydroxide (12.5 M) solutions with an activator ratio of 2.5 were used as alkali activators, and Al powder was used as a foaming agent. Research results reveal that Earth of Datça is a suitable precursor for producing a geopolymer foam. Fine sand and aluminum powder contents are critical to the optimum foam structure. The addition of finely ground silica sand ensured the volumetric stability of the binder and prevented the collapse after swelling of the binder. The optimum Al powder–to–pozzolan ratio was determined as 0.5% because it gives higher physical, mechanical, and thermal properties due to the more homogenous microstructure with finer pore size and narrower pore size distribution lower degree of interconnectivity between the pores. Research results also show that the natural volcanic Tuff of Datça Peninsula as an aluminosilicate source gives promising results in the field of producing highly porous geopolymers with low thermal conductivity (0.087–0.134 W/ mK), high porosity (72.3–82.6%) and an adequate compressive strength (0.40–2.09 MPa). This study contributes to the literature that Earth of Datça–based geopolymer foam may function well as an insulation material for building enclosures.

Anahtar Kelime: natural pozzolan alkali activator geopolymer foam porosity optical microscopy thermal conductivity

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

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APA	Barış K, TANACAN L (2022). Natural pozzolan-based green geopolymer foam for thermal insulation. , 128 - 144. 10.47481/jscmt.1142100
Chicago	Barış Kübra Ekiz,TANACAN LEYLA Natural pozzolan-based green geopolymer foam for thermal insulation. (2022): 128 - 144. 10.47481/jscmt.1142100
MLA	Barış Kübra Ekiz,TANACAN LEYLA Natural pozzolan-based green geopolymer foam for thermal insulation. , 2022, ss.128 - 144. 10.47481/jscmt.1142100
AMA	Barış K,TANACAN L Natural pozzolan-based green geopolymer foam for thermal insulation. . 2022; 128 - 144. 10.47481/jscmt.1142100
Vancouver	Barış K,TANACAN L Natural pozzolan-based green geopolymer foam for thermal insulation. . 2022; 128 - 144. 10.47481/jscmt.1142100
IEEE	Barış K,TANACAN L "Natural pozzolan-based green geopolymer foam for thermal insulation." , ss.128 - 144, 2022. 10.47481/jscmt.1142100
ISNAD	Barış, Kübra Ekiz - TANACAN, LEYLA. "Natural pozzolan-based green geopolymer foam for thermal insulation". (2022), 128-144. https://doi.org/10.47481/jscmt.1142100

APA	Barış K, TANACAN L (2022). Natural pozzolan-based green geopolymer foam for thermal insulation. Journal of sustainable construction materials and technologies (Online), 7(3), 128 - 144. 10.47481/jscmt.1142100
Chicago	Barış Kübra Ekiz,TANACAN LEYLA Natural pozzolan-based green geopolymer foam for thermal insulation. Journal of sustainable construction materials and technologies (Online) 7, no.3 (2022): 128 - 144. 10.47481/jscmt.1142100
MLA	Barış Kübra Ekiz,TANACAN LEYLA Natural pozzolan-based green geopolymer foam for thermal insulation. Journal of sustainable construction materials and technologies (Online), vol.7, no.3, 2022, ss.128 - 144. 10.47481/jscmt.1142100
AMA	Barış K,TANACAN L Natural pozzolan-based green geopolymer foam for thermal insulation. Journal of sustainable construction materials and technologies (Online). 2022; 7(3): 128 - 144. 10.47481/jscmt.1142100
Vancouver	Barış K,TANACAN L Natural pozzolan-based green geopolymer foam for thermal insulation. Journal of sustainable construction materials and technologies (Online). 2022; 7(3): 128 - 144. 10.47481/jscmt.1142100
IEEE	Barış K,TANACAN L "Natural pozzolan-based green geopolymer foam for thermal insulation." Journal of sustainable construction materials and technologies (Online), 7, ss.128 - 144, 2022. 10.47481/jscmt.1142100
ISNAD	Barış, Kübra Ekiz - TANACAN, LEYLA. "Natural pozzolan-based green geopolymer foam for thermal insulation". Journal of sustainable construction materials and technologies (Online) 7/3 (2022), 128-144. https://doi.org/10.47481/jscmt.1142100