Effects of Expanded Perlite and Polyurethane Waste Aggregates on Mechanical Behavior and Permeability Properties of Lightweight Concretes

Ömer Fatih Sak

Makale detayları

Effects of Expanded Perlite and Polyurethane Waste Aggregates on Mechanical Behavior and Permeability Properties of Lightweight Concretes

Yazarlar:

Ömer Fatih Sak

Yayıncı:

Van Yuzuncu Yıl University

Ana Başlıklar:

İnşaat Yapım Mühendisliği

Dergi:

Van Yüzüncü Yıl Üniversitesi Mühendislik Fakültesi Dergisi Vol.2 Issue 2, pp.31-45

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001334265

pISSN:

3023-5286

Anahtar kelimeler:

Özet:

 The aim of this study is to investigate the use of expanded perlite material as concrete aggregate in the production of lightweight concrete. In addition, the usability of polyurethane waste materials as aggregate in lightweight concrete is also examined within the scope of the study. In this context, mixtures in which only containing expanded perlite aggregate, perlite and polyurethane waste aggregate together, and completely polyurethane waste aggregate were prepared. In addition, steel and synthetic fibers were added separately to the mixtures to improve the mechanical properties of these mixtures. Reference mixtures without any fibers were prepared for comparison. Steel and synthetic fibers were used at 0.5 and 1 by volume. The highest bending strength and splitting tensile strength values, 5.30 and 3.05 MPa, respectively, were reached in samples using only perlite aggregate and containing 1 steel fiber. Among all mixtures, the lowest bending and splitting tensile strength values were 1.00 and 0.50 MPa, respectively, in samples using only polyurethane aggregate and containing no fibres. The effect of perlite and polyurethane aggregate on the permeability properties of lightweight concrete was determined by water absorption and capillary water absorption tests. Since polyurethane aggregate is in powder form, the water requirement of concrete is much higher than mixtures containing perlite aggregate, and the permeability values of these mixtures are higher. As a result of the study, it was determined that structural lightweight concretes could be produced using perlite aggregates, whereas the mechanical strength of concrete mixtures using polyurethane waste was insufficient for structural lightweight concretes.

 The aim of this study is to investigate the use of expanded perlite material as concrete aggregate in the production of lightweight concrete. In addition, the usability of polyurethane waste materials as aggregate in lightweight concrete is also examined within the scope of the study. In this context, mixtures in which only containing expanded perlite aggregate, perlite and polyurethane waste aggregate together, and completely polyurethane waste aggregate were prepared. In addition, steel and synthetic fibers were added separately to the mixtures to improve the mechanical properties of these mixtures. Reference mixtures without any fibers were prepared for comparison. Steel and synthetic fibers were used at 0.5 and 1 by volume. The highest bending strength and splitting tensile strength values, 5.30 and 3.05 MPa, respectively, were reached in samples using only perlite aggregate and containing 1 steel fiber. Among all mixtures, the lowest bending and splitting tensile strength values were 1.00 and 0.50 MPa, respectively, in samples using only polyurethane aggregate and containing no fibres. The effect of perlite and polyurethane aggregate on the permeability properties of lightweight concrete was determined by water absorption and capillary water absorption tests. Since polyurethane aggregate is in powder form, the water requirement of concrete is much higher than mixtures containing perlite aggregate, and the permeability values of these mixtures are higher. As a result of the study, it was determined that structural lightweight concretes could be produced using perlite aggregates, whereas the mechanical strength of concrete mixtures using polyurethane waste was insufficient for structural lightweight concretes.

 The aim of this study is to investigate the use of expanded perlite material as concrete aggregate in the production of lightweight concrete. In addition, the usability of polyurethane waste materials as aggregate in lightweight concrete is also examined within the scope of the study. In this context, mixtures in which only containing expanded perlite aggregate, perlite and polyurethane waste aggregate together, and completely polyurethane waste aggregate were prepared. In addition, steel and synthetic fibers were added separately to the mixtures to improve the mechanical properties of these mixtures. Reference mixtures without any fibers were prepared for comparison. Steel and synthetic fibers were used at 0.5 and 1 by volume. The highest bending strength and splitting tensile strength values, 5.30 and 3.05 MPa, respectively, were reached in samples using only perlite aggregate and containing 1 steel fiber. Among all mixtures, the lowest bending and splitting tensile strength values were 1.00 and 0.50 MPa, respectively, in samples using only polyurethane aggregate and containing no fibres. The effect of perlite and polyurethane aggregate on the permeability properties of lightweight concrete was determined by water absorption and capillary water absorption tests. Since polyurethane aggregate is in powder form, the water requirement of concrete is much higher than mixtures containing perlite aggregate, and the permeability values of these mixtures are higher. As a result of the study, it was determined that structural lightweight concretes could be produced using perlite aggregates, whereas the mechanical strength of concrete mixtures using polyurethane waste was insufficient for structural lightweight concretes.

 Bu çalışmanın amacı genleştirilmiş perlit malzemenin beton agregası olarak hafif beton üretiminde kullanılmasını araştırmaktır. Ayrıca çalışma kapsamında poliüretan atık malzemelerin hafif betonda agrega olarak kullanılabilirliği de incelenmektedir. Bu kapsamda, yalnızca genleştirilmiş perlit agrega, perlit ve poliüretan atık agreganın birlikte kullanıldığı ve tamamen poliüretan atık agrega kullanılan karışımlar hazırlanmıştır. Ayrıca bu karışımların mekanik özelliklerini geliştirmek için çelik ve sentetik lifler ayrı ayrı olarak karışımlara ilave edilmiştir. Karşılaştırma amacıyla herhangi lif kullanılmayan referans karışımlarda hazırlanmıştır. Çelik ve sentetik lifler hacimce 0,5 ve 1 oranında kullanılmıştır. En yüksek eğilme dayanımı ve yarmada çekme dayanımı değerlerine sırasıyla 5,30 ve 3,05 MPa olarak sadece perlit agrega kullanılan ve 1 oranında çelik lif içeren numunelerde ulaşılmıştır. Tüm karışımlar arasında ise en düşük eğilme ve yarma çekme dayanımı değerleri ise sırasıyla 1,00 ve 0,50 MPa olmak üzere yalnızca poliüretan agrega kullanılan lif içermeyen numunelerde gerçekleşmiştir. Perlit ve poliüretan agreganın hafif betonun geçirimlilik özelliklerine etkisi su emme ve kılcal su emme testleri ile belirlenmiştir. Poliüretan agreganın toz halde olmasından dolayı betonun su ihtiyacı perlit agregalı karışımlara kıyasla çok daha fazla olmaktadır ve bu karışımların geçirimlilik değerleri daha yüksektir. Çalışma sonucunda, perlit agregalar kullanılarak taşıyıcı özellikte yapısal hafif betonların üretilebileceği, poliüretan atık kullanılan beton karışımlarının ise mekanik dayanımlarının yapısal hafif betonlar için uygun olmadığı belirlenmiştir.

Makale detayları

Effects of Expanded Perlite and Polyurethane Waste Aggregates on Mechanical Behavior and Permeability Properties of Lightweight Concretes

Yazarlar:

Ömer Fatih Sak

Yayıncı:

Van Yuzuncu Yıl University

Ana Başlıklar:

İnşaat Yapım Mühendisliği

Dergi:

Van Yüzüncü Yıl Üniversitesi Mühendislik Fakültesi Dergisi Vol.2 Issue 2, pp.31-45

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001334265

pISSN:

3023-5286

Expanded Perlite

Polyurethane Waste

Fiber

Lightweight Concrete

Mechanical Behavior

PermeabilityGenleştirilmiş Perlit

Poliüretan Atık

Lif

Hafif Beton

Mekanik Davranış

Geçirimlilik

Sayı

Makale detayları

Yazarlar: Ömer Fatih Sak

Yayıncı: Van Yuzuncu Yıl University

Ana Başlıklar: İnşaat Yapım Mühendisliği

Dergi: Van Yüzüncü Yıl Üniversitesi Mühendislik Fakültesi Dergisi Vol.2 Issue 2, pp.31-45

Belge Tipi: Makale

Yayın Tarihi: 12/2024

Belge Dili: Türkçe

Document ID (Org No.): 2001334265

pISSN: 3023-5286

Sayı

Yazarlar:

Ömer Fatih Sak

Yayıncı:

Van Yuzuncu Yıl University

Ana Başlıklar:

İnşaat Yapım Mühendisliği

Dergi:

Van Yüzüncü Yıl Üniversitesi Mühendislik Fakültesi Dergisi Vol.2 Issue 2, pp.31-45

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001334265

pISSN:

3023-5286