Development of Efflorescence Control Methods of Fly Ash Based Foam Geopolymers

Year 2020, Volume: 20 Issue: 1, 129 - 137, 17.03.2020

Cansu Kurtulus , Mustafa Serhat Başpınar

https://doi.org/10.35414/akufemubid.667647

Cited By: 1

Abstract

Since the environmental impacts of carbon emissions due to the cement production have started to be discussed, an alternative material has been sought. Geopolymers are new generation materials which are good candidates to be used instead of cement in the building. Within the scope of geopolymer technology, the reuse of waste materials such as fly ash and blast furnace slag enable reuse of both the reduction of waste stock and the production of new generation material which excites the scientific world. However, various problems that has been focused on prevent the advancement of this technology. Efflorescence is an important problem in the development of geopolymer technology. White residues formed on the surfaces of the materials produced from geopolymer wetting are referred to as efflorescence. Although it may seem like a visual problem in the initial stage, it may cause structural problems in later stages. Therefore, it is an issue that needs to be addressed. In this study, studies were made to prevent or minimize this problem.

Keywords

Efflorescence, Fly Ash, Geopolymer, Hydrogen Peroxide

Supporting Institution

Afyon Kocatepe Üniversitesi

Project Number

19.Fen.Bil.01 BAP

Uçucu Kül Tabanlı Jeopolimerlerin Çiçeklenme Kontrol Yöntemlerinin Geliştirilmesi

Abstract

Çimento üretiminden kaynaklanan karbon emisyonlarının çevresel etkileri tartışılmaya başlandığından beri, çimentoya alternatif bir malzeme aranmaktadır. Jeopolimerler, binada çimento yerine kullanılmaya uygun yeni nesil malzemelerdir. Jeopolimer teknolojisi kapsamında, uçucu kül ve yüksek fırın cürufu gibi atık malzemelerin yeniden kullanılması, hem atık stokunun azaltılmasını hem de bilim dünyasını heyecanlandıran yeni nesil malzemenin üretimini sağlamaktadır. Fakat çeşitli sorunlar bu teknolojinin ilerlemesini engellemektedir. Çiçeklenme jeopolimer teknolojisinin geliştirilmesinin önünde önemli bir problemdir. Jeopolimerlerin ıslanması sonucu yüzeyleri üzerinde oluşan beyaz kalıntılara çiçeklenme denir. İlk aşamada yalnızca görsel bir sorun gibi görünse de, sonraki aşamalarda yapısal sorunlara neden olabilir. Bu nedenle, ele alınması gereken bir konudur. Bu çalışmada, bu sorunu önlemek veya en aza indirmek için çalışmalar yapılmıştır. Farklı molaritelerde hazırlanan ve farklı sıcaklıklarda kürlenen jeopolimer köpük numunelerin çiçeklenme davranışı incelenmiştir. Yüksek molaritelerde hazırlanan numunelerin ve daha düşük sıcaklıklarda kürlenen numunelerin çiçeklenme problemine daha yatkın olduğu tespit edilmiştir. 

Keywords

Çiçeklenme; Uçucu Kül; Jeopolimer; Hidrojen Peroksit

Project Number

19.Fen.Bil.01 BAP

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