INVESTIGATION OF STRUCTURAL LIGHTWEIGHT CONCRETE PRODUCTIBILITY WITH USING ERZINCAN RAW PERLITE AGGREGATE

Öz

A study was carried out on the production of structural lightweight concrete using raw perlite aggregate with a maximum aggregate particle diameter of 12.5 mm and granulometry conforming to the Fuller equation. For this, Concrete samples with five different cement dosages such as 150, 200, 250, 300 and 350 kg/m3 and two different slump values were prepared, to regulate the workability of fresh concrete, 1% of cement weight plasticizer was added to all mixes. The physical and mechanical properties of fresh and hardened concrete were determined according to the relevant standards of ASTM. According to the research results, it has been seen that it is possible to produce structural lightweight concrete with a unit weight of between 1600 and 1900 kg/m3 using perlite aggregate. The highest compressive strength of 35 MPa was reached after 90 days with a binder amount of 350 kg/m3 . According to the results of the research, one of the most effective parameters on the mechanical and physical properties of concrete is the slump value and the other is the amount of binder. The split tensile strength of the produced concrete was 11% of the compressive strength and the water absorption rate was 8%.

Anahtar Kelimeler

• Compressive strength
• Raw perlite aggregate
• Structural lightweight concrete
• Unit weight
• Tensile strength; Water absorption

Erzincan Ham Perlit Agregası Kullanılarak Taşıyıcı Hafif Beton Üretilebilirliğinin Araştırılması

Öz

Maksimum agrega tane çapı 12.5 mm olan ve granülometrisi Fuller denklemine uygun olan ham perlit agregası kullanılarak taşıyıcı hafif beton üretimi üzerine bir çalışma gerçekleştirilmiştir. Bu amaçla; 150, 200, 250, 300 ve 350 kg/m³ olmak üzere beş farklı çimento dozajında ve iki farklı çökme (slump) değerinde beton numuneleri hazırlanmıştır. Taze betonun işlenebilirliğini düzenlemek amacıyla, tüm karışımlara çimento ağırlığının %1’i oranında akışkanlaştırıcı katkı ilave edilmiştir. Taze ve sertleşmiş betonun fiziksel ve mekanik özellikleri ASTM standartlarına göre belirlenmiştir. Araştırma sonuçlarına göre; perlit agregası kullanılarak 1600 ile 1900 kg/m³ birim hacim ağırlığı arasında taşıyıcı hafif beton üretiminin mümkün olduğu görülmüştür. En yüksek basınç dayanımı, 350 kg/m³ bağlayıcı miktarıyla 90 gün sonunda 35 MPa olarak elde edilmiştir. Araştırma sonuçlarına göre; betonun mekanik ve fiziksel özellikleri üzerinde en etkili iki parametre çökme değeri ile bağlayıcı miktarıdır. Üretilen betonların yarmada çekme dayanımı, basınç dayanımının %11’i olarak belirlenmiş ve su emme oranı %8 olarak tespit edilmiştir.

Anahtar Kelimeler

• Basınç dayanımı
• Ham perlit agregası
• Taşıyıcı hafif beton
• Birim hacim ağırlığı
• Çekme dayanımı
• Su emme oranı

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