Comparative evaluation of mechanical performance of steel slag and earthen granular aggregates

Abstract

The diminishing quantity of natural resources has resulted in a search for alternative materials. Reusing industrial by-products, such as steel slag, provides opportunities for sustainable highway construction practices due to the valuable space they occupy and the potential environmental impacts when they are stockpiled. In this paper, the mechanical suitability of steel slag as an unbound highway aggregate is investigated, and its performance is compared with that of traditional graded aggregate base (GAB) materials. In order to compare the behavior, three steel slag samples with different aging properties and five aggregate samples from different quarries were employed. The results indicate that resilient moduli and permanent. Deformation characteristics of steel slag are comparable with those of traditional aggregates and can replace when used as a base or subbase course.

Keywords

• resilient modulus
• permanent deformation
• steel slag

Çelik cürufu ve doğal agregaların mekanik performansları üzerine karşılaştırmalı bir inceleme

Öz

Doğal kaynakların gitgide tükenmesi, alternatif malzeme arayışlarını beraberinde getirmiştir. Çelik cürufu gibi endüstriyel yan ürünlerin yeniden kullanımı, kapladıkları değerli alan ve üst üste yığıldığında meydana gelebilecek olası çevresel etkileri nedeniyle sürdürülebilir otoyol inşaatı uygulamaları için fırsatlar sunmaktadır. Bu çalışmada, çelik cürufunun karayolu agregası olarak mekanik açıdan uygunluğu araştırılmış ve performansı geleneksel agrega malzemeleriyle karşılaştırılmıştır. Bu bağlamda farklı yaşlanma özelliklerine sahip üç adet çelik cürufu numunesi ve beş farklı ocaktan getirilen doğal agrega kullanılmıştır. Sonuçlar, çelik cürufunun esneklik modüllerinin ve kalıcı deformasyon özelliklerinin doğal agregalarınkilerle benzer mertebelerde olduğunu ve bir temel veya alt temel tabakası olarak söz konusu malzemelerin yerine kullanılabileceğini göstermektedir.

Anahtar Kelimeler

• Çelik cürufu
• Esneklik modülü
• Kalıcı deformasyon

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