Serkan SUBAŞI, Heydar DEHGHANPOUR, Betül İŞBİLİR KULA, Muhammed MARAŞLI

Sodyum tuzu esaslı toz katkı ilavesi ile üretilen hafif betonların mühendislik özelliklerinin araştırılması

Hızla artan dünya nüfusu için ihtiyaç duyulan inşaat sektöründe, güçlü ve güvenli binaların üretimine önem verilmektedir. Bu, yapı malzemelerinde işlevsellik, dayanıklılık ve ekonomik malzeme üretimi sonucunda elde edilmektedir. Binalarda ölü yükü azaltmak için hafif betondan yapılmış elemanların kullanılması en uygun ve alternatif yöntemdir. Bu çalışmada %0, %0,5, %1,5 ve %2,5 sodyum tuzu bazlı stiren bütadien polimer katkıları (SBPA) kullanılarak 4 farklı karışımla hafif beton üretilmiştir. Katkı maddesinin taze karışımlar üzerindeki işlenebilirlik etkisi yayılma tablosu testi ile araştırılmıştır. Elde edilen numunelerin 7 ve 28 günlük basınç ve eğilme dayanımları test edilmiştir. 28 günlük basınç dayanımı testinden önce numunelerin yoğunluk ve gözeneklilik oranları hesaplanmıştır. Elde edilen sonuçlara göre katkı maddesinin işlenebilirlikte bir miktar azalmaya neden olduğu gözlemlenmiştir. Ayrıca mekanik dayanımlarda azalmalar gözlenmiş ancak literatürle karşılaştırıldığında yoğunluktaki azalma dikkate alındığında uygun dayanımlara sahip hafif betonlar sınıfında olduğu anlaşılmıştır.

Anahtar Kelimeler:

hafif beton, yoğunluk, gözeneklilik, mekanik özellikler, toz katkı

Investigation of Engineering Properties of Lightweight Concrete Made With the Addition of Sodium Salt Based Powder Additive

In the construction sector, which is needed for the rapidly increasing world population, the production of strong and safe buildings is given importance. This is achieved as a result of the functionality, durability and economical material production in construction materials. In order to reduce the dead load in buildings, the use of elements made of lightweight concrete is the most appropriate and alternative method. In the current study, lightweight concrete with 4 different mixtures was produced by using 0%, 0.5%, 1.5% and 2.5% powdered sodium salt-based styrene butadiene polymer admixtures (SBPA). The workability effect of the additive on the fresh mixtures was investigated by the flow table test. The 7 and 28 day compressive and flexural strengths of the obtained samples were tested. Density and porosity ratios of the samples were calculated before the 28-day compressive strength test. According to the results, it was observed that the additive material caused a slight decrease in workability. In addition, decreases were observed in mechanical strengths, but when compared with the literature, considering the decrease in density, it was understood that it is in the class of lightweight concreteswith suitable strength.

Keywords:

lightweight concrete, density, porosity, mechanical properties, powder additive,

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