Su içeriği ve ısıl kür süresinin atık bazalt tozu esaslı geopolimer harçların fiziksel ve mekanik özelliklerine etkisi

Öz

Bu çalışmada bazalt taşı kesim atıkları ile üretilen geopolimer harçların mekanik ve fiziksel özellikleri araştırılmıştır. Bu amaçla 4 farklı su içeriği ile geopolimer harçlar üretilmiştir. Harçlarda aktivatör olarak sodyum silikat kullanılmıştır. Üretilen geopolimer harçlar 4, 8 ve 24 saat olmak üzere 3 farklı sürede 90ºC’de ısıl küre tabi tutulmuştur. Harçlar üzerinde yayılma, su emme-boşluk oranı, eğilme dayanımı ve basınç dayanımı deneyleri gerçekleştirilmiştir. En yüksek dayanım değerlerine en düşük su içeriği ile üretilen harçlarda ulaşılmıştır. 4 saat, 8 saat ve 24 saat ısıl küre tabi tutulan harçlarda en yüksek 28 günlük basınç dayanımları sırasıyla 8,1 MPa, 17,7 MPa ve 28,6 MPa olarak elde edilmiştir. Bu deneysel çalışmanın bir sonucu olarak, atık bazalt tozunun geopolimer üretiminde değerlendirilebileceği ve bu sayede çevresel ve ekonomik fayda sağlanabileceği söylenebilir.

Anahtar Kelimeler

• Atık bazalt tozu
• Geopolimer
• Dayanım
• Isıl kür

The effects of water content and thermal curing time on physical and mechanical properties of waste basalt powder based geopolymer mortars

Abstract

In this study, the mechanical and physical properties of geopolymer mortars produced with cutting waste of basalt stone has been investigated. For this purpose, geopolymer mortars made with four different water content. Sodium silicate was used as activator in the mortars. The produced mortars subjected to heat-curing for 4, 8 and 24 hours at 90ºC, separately. The flowing, water absorption-porosity, flexural and compressive strength tests were performed on the mortars. The highest strength values were obtained on the mortars made with the lowest water content. The highest 28-day compressive strengths were obtained as 8.1 MPa, 17.7 MPa and 28.6 MPa in mortars heat cured for 4 hours, 8 hours and 24 hours, respectively. Besides, it can be concluded that the waste basalt powder can be utilized for the geopolymer production and thus environmental and economic benefits can be obtained.

Keywords

• Waste basalt powder
• Geopolymer
• Strength
• Heat curing

Kaynakça

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