Farklı çimentolardan üretilen köpük betonlarda atık lastiklerin hafif agrega olarak kullanımı

Year 2021, Volume: 11 Issue: 3, 692 - 703, 15.07.2021

Oğuzhan Yavuz Bayraktar , Gökhan Kaplan

https://doi.org/10.17714/gumusfenbil.859989

Cited By: 2

Abstract

Küresel ısınmanın artmasıyla birlikte günümüzde yapıların ölü yüklerini azaltmak ve ısı yalıtımı özelliklerini iyileştirmek için geleneksel betona alternatif çözümler aranmaktadır. Bu ihtiyaçlardan dolayı düşük birim ağırlık ve üstün termal özellikleri sahip köpük beton ön plana çıkmaktadır. Bu çalışmada, farklı çimentolar ile farklı birim ağırlığa sahip köpük betonlar üretilmiştir. Çalışma kapsamında CEM II, CEM III ve CEM IV’den oluşan kompoze çimentolar kullanılmıştır. 30, 60 ve 90 kg/m3 köpük içeriği ile 9 farklı karışım elde edilmiştir. Köpük betonların üretiminde agrega olarak 0-1 mm boyutunda atık lastikler kullanılmıştır. Köpük içeriği arttıkça betonların görünür porozite ve su emme değerleri artarken birim ağırlık değerleri azalmıştır. Köpük betonların birim ağırlıkları 595-980 kg/m3 arasında değişmektedir. 28 günlük basınç dayanımları ise 0.53-1.56 MPa arasında değişmektedir. Köpük betonların köpük içeriği arttıkça su işleme derinliği azalmıştır. Köpük betonların su işleme derinlikleri 2.6-8.2 mm arasındadır. İki yönlü ANOVA analizi sonucunda çimento tipindeki değişim köpük beton özelliklerini etkilememektedir. Ancak köpük içeriğindeki değişim köpük beton özelliklerini doğrudan etkileyebilmektedir. CEM III tipi çimentodan üretilen köpük betonların mekanik özellikleri diğer çimento tiplerine göre daha yüksek olmaktadır. Sonuç olarak çevre ve insan sağlığı açısından zararlı olan atık lastiklerin köpük beton üretiminde kullanılabileceği belirlenmiştir. Atık lastik agregası ile üretilen köpük betonların tuğladan daha iyi yakın bir termal özellik göstereceği tahmin edilmektedir.

Keywords

Atık lastik, Görünür porozite, Kılcallık, Köpük beton, Sürdürülebilirlik

Use of waste tires as lightweight aggregate in foam concrete produced from different cement

Abstract

With the increase in global warming, alternative solutions to traditional concrete are being inquired today to reduce dead loads of structures and improve their thermal insulation properties. Due to these needs, foam concrete with low unit weight and superior thermal properties comes to the fore. In this study, foam concretes with different unit weight were produced with different cements. In the scope of the study, composite cements consisting of CEM II, CEM II and CEM IV were used. 9 different mixtures were obtained with foam contents of 30, 60 and 90 kg/m3. 0-1 mm waste tires were used as aggregate in the production of foam concretes. As the foam content increased, the apparent porosity and water absorption values of concrete increased, while the unit weight values decreased. The unit weights of foam concretes range from 595-980 kg/m3. 28-day compressive strength ranges from 0.53-1.56 MPa. As the foam content of foam concretes increased, the depth of water penetration decreased. Water penetration depths of foam concrete are between 2.6-8.2 mm. As a result of two-way ANOVA analysis, the change in cement type does not affect the properties of foam concrete. But the change in foam content can directly affect the properties of foam concrete. The mechanical properties of foam concrete produced from CEM III type cement are higher than other cement types. As a result, it was determined that waste tires that are harmful to the environment and human health can be used in the production of foam concrete. It is estimated that foam concrete produced with waste rubber aggregate will show a closer thermal property than brick.

Keywords

Waste tire, Apparent porosity, Capillarity, Foam concrete, Sustainability

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