The Mechanical and Durability Properties of Cement Mortars with Different Types of Fibers and Chemical Admixtures

Year 2024, Volume: 26 Issue: 76, 98 - 104, 23.01.2024

Dilan Çankal Ali Uğur Öztürk Gökhan Kaplan

https://doi.org/10.21205/deufmd.2024267612

Abstract

Improving the mechanical and durability properties of cement-based materials such as concrete is very important. The use of fibers is a good alternative in cement-based materials production. This study investigated workability, some mechanical and durability properties of cement mortar in cooperation with glass and basalt fiber. Basalt and glass fibers were used instead of the aggregate in the mixture as 0.8 and 1% by weight. The compatibility of the polycarboxylate-based water reducer and the modified phosphonate-based water reducer as chemical admixtures in selected ratios and fibers was tested. Experiments were carried out after 7 and 28 days of water cure and the effect of the curing periods were also determined. Flexural strength values of basalt fiber reinforced samples in all sets were found to be more than glass fiber reinforced samples. However, high compressive strength are obtained in glass fiber reinforced samples. Beside the positive results obtained in the mechanical properties, the effects of the fibers in the abrasion and acid resistance (10% hydrochloric acid solution during 30 days) have given positive results.

Keywords

Cement mortar, Flexural strength, Durability, Abrasion resistance, Acid resistance

Farklı Tip Lif ve Kimyasal Katkı İçeren Çimento Harçlarının Mekanik ve Dayanıklılık Özellikleri

Abstract

Beton gibi çimento esaslı malzemelerin mekanik ve dayanıklılık özelliklerinin iyileştirilmesi çok önemlidir. Çimento esaslı malzeme üretiminde lif kullanımı önemli bir alternatiftir. Bu çalışmada, çimento harcında cam ve bazalt lifi kullanılarak işlenebilirlik, bazı mekanik ve dayanıklılık özellikleri incelenmiştir. Karışımda agrega yerine ağırlıkça %0,8 ve %1 oranında bazalt ve cam lifi kullanılmıştır. Ayrıca, polikarboksilat esaslı hiperakışkanlaştırıcı ve modifiye fosfonat esaslı süper akışkanlaştırıcının çeşitli oranlarda liflerle uyumluluğu test edilmiştir. 7 ve 28 günlük su küründen sonra deneyler yapılmış ve kür sürelerinin etkisi de belirlenmiştir. Bazalt lifi içerikli eğilme dayanımı değerleri, cam lifi içerikli numunelere göre daha fazla bulunmuştur. Ancak cam lifi içerikli numunelerde yüksek basınç dayanımı elde edilmiştir. Mekanik özelliklerde elde edilen olumlu sonuçların yanı sıra, liflerin aşınma ve asit direnci (30 gün boyunca %10 hidroklorik asit çözeltisi) üzerindeki etkileri de olumlu sonuçlar sağlamıştır.

Keywords

Çimento harcı, Eğilme dayanımı, Durabilite, Aşınma direnci, Asit direnci

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