Formulation of Mechanical Properties of Hybrid Fiber Alkali-activated Concretes by Data Analysis

Öz

In this study, ground blast furnace slag (GBFS) and waste volcanic rock dust (RD) produced in a natural stone processing plant were used as binders. The binders were activated with Sodium Hydroxide (NaOH) and Sodium Silicate (Na2SiO3) to produce two types of concrete: alkali-activated concrete without fibers (AAC) and alkali-activated concrete with fibers (FAAC). In the production of concrete, steel and polyester fibers were used separately and hybrid at 0.25%, 0.50%, 0.75% and 1.0% by volume and a total of 117 15x15x15 cm cube specimens were produced. The mechanical properties of the specimens were evaluated by concrete surface hardness, ultrasonic pulse velocity and concrete compressive strength tests at 3, 7 and 28 days. The results obtained using non-destructive test methods were matched with concrete compressive strength values using various empirical formulas. Calculated concrete compressive strength values and actual concrete compressive strength values were compared using data analysis method. As a result, it was observed that there was a very significant correlation between the experimental compressive strength and the combined method in which 7-day surface hardness and ultrasound transmission rate were used together to calculate the compressive strength.

Anahtar Kelimeler

• Data Analysis
• Fiber Alkali Activated Concretes
• Mechanical Properties
• Non-Destructive Testing
• Short Curing Time.

Hibrit Lifli Alkali Aktivasyonlu Betonların Mekanik Özelliklerinin Veri Analizi ile Formüle Edilmesi

Öz

Bu çalışmada, bir doğal taş işleme tesisinden atık olarak elde edilen volkanik kaya tozu (KT) ve öğütülmüş yüksek fırın cürufu (ÖYFC) bağlayıcı olarak kullanılmıştır. Bağlayıcılar Sodyum Hidroksit (NaOH) ve Sodyum Silikat (Na2SiO3) ile aktive edilerek iki tip beton üretilmiştir: alkalilerle aktive edilmiş lifsiz beton (AAB) ve alkalilerle aktive edilmiş lifli beton (LAAB). Beton üretiminde çelik ve polyester lifler hacimce %0,25, %0,50, %0,75 ve %1,0 oranlarında ayrı ayrı ve hibrit olarak kullanılmış ve toplam 117 adet 15x15x15 cm boyutlarında küp numune üretilmiştir. Numunelerin mekanik özellikleri beton yüzey sertliği, ultrasonik geçiş hızı ve 3, 7 ve 28 günlük beton basınç dayanımı testleri ile değerlendirilmiştir. Tahribatsız test yöntemleri kullanılarak elde edilen sonuçlar, çeşitli ampirik formüller kullanılarak beton basınç dayanımı değerleri ile eşleştirilmiştir. Hesaplanan beton basınç dayanımı değerleri ile gerçek beton basınç dayanımı değerleri veri analizi yöntemi kullanılarak karşılaştırılmıştır. Sonuç olarak, basınç dayanımını hesaplamak için 7 günlük yüzey sertliği ve ultrasonik geçiş hızının birlikte kullanıldığı birleşik yöntem ile deneysel basınç dayanımı arasında çok anlamlı bir korelasyon olduğu görülmüştür.

Anahtar Kelimeler

• Kısa Kür Süresi
• Lifli Alkali Aktivasyonlu Betonlar
• Mekanik Özellikler
• Tahribatsız Test
• Veri Analizi

Kaynakça

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