Geri Dönüşüm Agregalı Betonların Çökme Değerlerinin Tepki Yüzeyi Metodu ile Tahmini

Bu çalışmanın amacı farklı oranlarda geri dönüşümlü beton agregası kullanılarak üretilen betonların çökme değerlerini yüksek doğrulukla tahmin eden matematiksel bir model geliştirmektir. Bu amaçla farklı karışımlara sahip beton serileri üretilmiş ve bu serilere ait çökme değerleri kullanılarak tepki yüzeyi metodu üzerinde istatistik analizler yapılmıştır. Yapılan analizler sonucunda geliştirilen modelin belirlilik katsayısı 0.87 olarak hesaplanmış ve bu durum modelin yüksek doğruluklu ve etkin bir şekilde kullanılabileceğini göstermiştir. Geri dönüşümlü beton agregaları yüksek su emme kapasitesi, düşük yoğunluk ve geniş karakteristik özelliklere sahip olduğundan geliştirilen bu modelin benzer yoğunluk ve su emme değerlerine sahip olan geri dönüşüm agregalı betonların çökme değerlerini pratik ve yüksek doğrulukla tahmin edileceği düşünülmektedir. Böylece bu modelin kullanımının, beton karışım hesapları ve deneme karışımları sürecinde zaman ve işçilik açısından faydalar sağlayacağı düşünülmektedir.

Anahtar Kelimeler:

İnşaat ve yıkıntı atıkları, Geri dönüşümlü beton agregaları, Tepki yüzeyi metodu, Taze beton özellikleri.

Prediction of Slump Values of Recycled Aggregate Concretes by Response Surface Method

The aim of this study is to develop a mathematical model that predicts the slump values of concrete produced by using recycled concrete aggregate in different proportions with high accuracy. For this purpose, concrete series with different mixtures were produced and statistical analyzes were made on the response surface method by using the slump values of these series. As a result of the analyses made, the coefficient of determination of the developed model was calculated as 0.87 and this showed that the model could be used with high accuracy and effectively. Using this model, it is thought that the slump values of the concretes to be produced using recycled concrete aggregates with similar density and water absorption values will be estimated practically and with high accuracy. Thus, using this model will provide benefits in terms of time and labor in the concrete mix calculations and trial mixes.

Keywords:

Construction and demolition waste, Recycled concrete aggregate, Response surface method, Fresh concrete properties.,

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