Investigation of Suitable Plasticizer / Setting Accelerator Additive Type in Foam Concrete Production

Year 2019, Volume: 19 Issue: 2, 390 - 400, 17.09.2019

İsmail Demir , Mustafa Serhat Başpınar Erhan Kahraman

Abstract

Foam concrete has an
increasing use today. It is a preferred type of lightweight concrete due to its
ease of application and low unit weight. In this study, the effects of
plasticizer and setting accelerator additives added to foam concrete mixtures
were investigated and optimization studies were carried out. According to this,
the effect of fluidity, water / binder, water / solid ratios on fresh and
hardened concrete properties were investigated. In this study, two different
plasticizer additives and one setting accelerator chemical additive were used.
The effects of chemical additives on mixtures were investigated. Use of the
same proportions of polycarboxylic ether-based superplasticizer (SAp)
additive   compared to the addition of
melamine sulfonate polymer based superplasticizer (SAm)  were reduce fluidity times (more fluidty) and
accordingly, higher strength values were obtained. Rheological properties of
the foam concrete can be determined in practice by Marsh cone method.

Keywords

Foam concrete, Plasticizer, Setting accelerator, Rheology

Köpük Beton Üretiminde Uygun Akışkanlaştırıcı/Priz Hızlandırıcı Katkı Türünün Araştırılması

Abstract

Köpük
betonlar günümüzde giderek artan bir kullanıma sahiptir. Uygulanmasının
kolaylığı ve birim ağırlığının düşük oluşu sebebiyle tercih edilen bir hafif
beton türüdür. Bu çalışmada köpük beton karışımlara ilave edilen
akışkanlaştırıcı ve priz hızlandırıcı katkıların etkileri incelenerek
optimizasyon çalışmaları yürütülmüştür. Buna göre akışkanlık, su/bağlayıcı,
su/katı oranlarının taze ve sertleşmiş beton özelliklerine etkisi
incelenmiştir. Çalışmada iki farklı süper akışkanlaştırıcı (SA) katkı ve bir priz
hızlandırıcı kimyasal katkı kullanılmıştır. Polikarboksilik eter
esaslı süper akışkanlaştırıcı (SAp) katkının, aynı oranlarda Melamin sülfonat
polimeri esaslı süper akışkanlaştırıcı (SAm) katkıya göre akışkanlık
sürelerinde azalma (daha akışkan) ve buna bağlı olarak daha yüksek dayanım
değerleri sağlamıştır. Köpük betonun akışkanlık özelliklerinin Marsh konisi ile
ölçülmesinin özellikle şantiye ortamında kolay ve pratik bir yöntem olacağı
değerlendirilmiştir.

Keywords

Köpük beton, Akışkanlaştırıcı, Priz hızlandırıcı, Reoloji

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