Seramik Sağlık Gereci Atıklarının Geopolimer Harç Üretiminde Kullanılabilirliğinin Araştırılması

Bu çalışmada, seramik sağlık gereci (vitrifiye) üretimi esnasında ortaya çıkan hatalı/ıskarta ürünlerin öğütülmesi ile elde edilen atık tozlar alkali ile aktive edilerek geopolimer harçlar üretilmiştir. Üretilen harçlara farklı sıvı/bağlayıcı oranı ve aktivatör molaritesinin etkisi araştırılmıştır. Bu amaçla sıvı bağlayıcı 0,45 ve 0,50 oranlarında 10, 12, 14 ve 16 M NaOH çözeltilerinde karışımlar hazırlanmıştır. Üretilen harç karışımlarına 80°C’de 24 saat ısıl kür ve 28 güne kadar havada kür uygulanmıştır. Numunelere işlenebilirlik, birim ağırlık, eğilme ve basınç dayanımı, su emme ve boşluk oranı deneyleri uygulanmıştır. Numunelerin sıvı/bağlayıcı oranı 0,50 iken molaritenin artması mekanik özelliklere olumlu etkisi olmamakta ancak işlenebilirliği iyileştirmektedir. 0,45 sıvı/bağlayıcı oranında ise molaritenin artışı dayanımda önemli gelişme göstererek 16 M NaOH konsantrasyonunda yaklaşık 34 MPa basınç dayanımı elde edilmiştir. Ancak artan dayanım, çevresel ve ekonomik koşullar açısından geopolimer harç üretimi için uygun molaritenin sıvı/bağlayıcı oranı 0,45’de 12 M NaOH olduğu belirlenmiştir.

Anahtar Kelimeler:

Seramik sağlık gereci, geopolimer, harç

Investigation of Usability of Ceramic Sanitaryware Wastes in Geopolymer Mortar Production

In this study, geopolymer mortars were produced with alkali activated the waste powders obtained by grinding of the defective / discarded products generated during the production of vitrified (ceramic sanitaryware) products. The effect of different liquid / binder ratio and activator molarity was investigated on the produced mortars. To achieve this goal, geopolymer mortars were prepared with liquid:binder ratios of 0.45, 0.50 and in four different molarities as 10, 12, 14 and 16 M NaOH. The produced mixtures were cured in oven at 80℃ for 24 h then in air for a period 28 days. The workability, unit weight, flexural and compressive strength, water absorption and volume of permeable voids ratio tests were performed on mortar samples. While the liquid:binder ratio of the samples is 0.50, the increase in molarity was not have a positive effect on mechanical properties, but improved the workability. When the liquid:binder ratio is 0.45, the increase in molarity showed a significant improvement in the strength and approximately 34 MPa compressive strength was obtained at 16 M NaOH concentration. However, in terms of improved strength, environmental and economic conditions, it has been determined that the appropriate molarity for geopolymer mortar production is 12 M at 0.45 in liquid:binder ratio.

Keywords:

Sanitaryware, geopolymer, mortar,

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