The Characterization of Crushed Natural Stone Aggregates

Öz

Marble and volcanic rocks are a widespread aggregate resource and are increasingly being used in concrete constructions worldwide. This paper presents a study's results to compare the properties of concretes prepared with marble, andesite, and basalt used as aggregates. Three aggregate types were supplied locally from three different areas in Turkey. Chemical, petrographic, and mineralogical analysis was carried out on all these samples. A variety of laboratory tests determined the physical and mechanical properties of all aggregates. Water absorption, material finer than 63 µm, Los Angeles abrasion test, Mg2SO4 soundness, and alkali-silica reaction indicate that andesite aggregate is of lower quality than basalt marble aggregates. Test results show that crushed marble concrete has the highest workability, followed by crushed basalt and crushed andesite aggregates.

Anahtar Kelimeler

• Concrete
• Aggregate
• Natural stone
• Marble
• Basalt
• Andesite.

Kırılmış Doğal Taş Agregaların Karakterizasyonu

Öz

Mermer ve volkanik kayaçlar yaygın bir agrega kaynağıdır ve dünya çapında beton yapılarda giderek daha fazla kullanılmaktadır. Bu makalede agrega olarak kullanılan mermer, andezit ve bazaltın karakterizasyonu amacıyla hazırlanmıştır. Türkiye'deki üç farklı bölgeden üç agrega türü tedarik edilmiştir. Tüm bu numuneler üzerinde kimyasal, petrografik ve mineralojik analizler yapılmıştır. Çeşitli laboratuvar testleri ile tüm agregaların fiziksel ve mekanik özellikleri belirlenmiştir. Su emme, 63 µm'den az malzeme, Los Angeles aşınma testi, Mg2SO4 sağlamlığı ve alkali-silika reaksiyonu, andezit agregasının bazalt mermer agregalarından daha düşük kalitede olduğunu göstermektedir. Test sonuçları, kırılmış mermer agregaların en yüksek beton işlenebilirliğine sahip olduğunu, ardından kırılmış bazalt ve andezit agregalarının geldiğini göstermektedir.

Anahtar Kelimeler

• Beton
• Agrega
• Doğal taş
• Mermer
• Bazalt
• Andezit.

Kaynakça

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