Lifli betonlar için elastisite modülü tahmini

Yıl 2020, Cilt: 26 Sayı: 6, 1098 - 1109, 13.11.2020

Eren Yağmur

Öz

Bu çalışmada, farklı ayrık lif tiplerinin betonun elastisite modülü üzerindeki etkileri araştırılmıştır. Bu amaçla 260 adet silindirik basınç deney numunesi derlenmiştir. Dikkate alınan lif tipleri çelik, PVA, polipropilen, polyolefin, bazalt ve olefindir. Çalışma sonuçları tüm lif tipleri için kaba agrega miktarının ince agrega miktarına oranının 1.5’i aşması durumunda beton basınç dayanımının azaldığını göstermiştir. Çelik lifli karışımların lif narinlik oranının 60’dan küçük ve eşit olduğu durumlarda elastisite modülü artış gösterirken 60’dan büyük değerler için elastisite modülünün azaldığı görülmüştür. Dikkate alınan tüm lif tipleri için geçerli olan bir elastisite modülü denklemi önerilmiştir. Önerilen denklem deney sonuçları ile ve literatürde yer alan diğer formüllerle karşılaştırılmış ve farklı durumlar için denklemlerin geçerlilikleri sorgulanmıştır.

Anahtar Kelimeler

Elastisite modülü, Basınç dayanımı, Çelik lif, PVA, Polipropilen, Polyolefin

Kaynakça

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