Erhan KAHRAMAN, İsmail DEMİR, M. Serhat BAŞPINAR

Köpük Beton Üretiminde Uygun Akışkanlaştırıcı/Priz Hızlandırıcı Katkı Türünün Araştırılması

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

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

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.

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