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ÇELİK LİFLİ BETONLARIN DARBE DİRENCİNE AGREGA MAKSİMUM BOYUTUNUN ETKİSİ

THE EFFECT OF AGGREGATE MAXIMUM SIZE ON IMPACT RESISTANCE OF FIBER REINFORCED CONCRETE

Journal Name:

  • Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi

Publication Year:

  • 2008

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this study, the effect of maximum size of aggregate on impact resistance of fiber reinforced concrete were investigated. Using crushed limestone aggregate with 10, 15, 20 and 25 mm of maximum size, 8 different normal-steel fiber reinforced concretes were produced. Water/cement ratio and cement dosage of concrete mixtures are 0.5 and 400 kg/m3, respectively. Hooked-end bundled steel fibers with l/d ratio of 65 and 1.0% fiber volume were used in fiber concretes. After 28 days standard curing, compressive strength, split tensile strength and ultrasonic pulse velocity tests were performed on 150/150/150 mm cube specimens. Additionally, impact resistances of concrete specimens were determined using impact test apparatus described in ACI 544.3R-93. 150x300 mm cylinders were prepared for impact resistance tests. After 28 days curing, these specimens were cut and 150x64 mm special discs were prepared. Impact resistance test were performed on these special discs. Experimental results were evaluated corresponding to presence of steel fiber and aggregate maximum size.
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Abstract (Original Language): 
Bu çalışmada çelik lifli betonların darbe direncine, agrega maksimum dane boyutunun etkisi incelenmiştir. Çalışmada maksimum dane boyutu 10 mm, 15 mm, 20 mm ve 25 mm olan kireç taşı kökenli kırma agrega kullanılarak, 8 farklı lifsiz-çelik lifli beton üretilmiştir. Üretilen lifli-lifsiz betonlarda; su/çimento oranı 0.50, çimento dozajı 400 kg/m3 olarak sabit tutulmuştur. Lifli betonlarda hacimce % 1.0 oranında, narinliği 65 olan, iki ucu çengelli çelik lif kullanılmıştır. Üretilen betonlardan hazırlanan 150 mm ayrıtlı küp örnekler üzerinde, 28 günlük standart kür sonunda tek eksenli basınç, yarmada çekme ve ultra ses deneyleri yapılarak, betonların mekanik özellikleri belirlenmiştir. Ayrıca, çalışma kapsamında üretilen betonların darbe testleri ACI 544.3R-93 'ce önerilen darbe deney düzeneği kullanılarak gerçekleştirilmiştir. Darbe testleri için 150 mm çaplı 300 mm yükseklikli örnekler hazırlanarak 28 gün kür edildikten sonra, çapı 150 mm yüksekliği 64 mm olacak şekilde kesilerek özel diskler hazırlanmış ve bu diskler üzerinde darbe testleri yapılmıştır. Deneylerden elde edilen sonuçlar lif varlığı ve agrega maksimum boyutunun değişimine bağlı olarak değerlendirilmiştir.
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  • Turkish

REFERENCES

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Mühendislik Bilimleri Dergisi 2008 14 (3) 237-245
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