Silis dumanı katkılı taşıyıcı hafif betonun mekanik özelliklerinin araştırılması

Bu çalışmada, mineral katkı olarak silis dumanı (SD) ve agrega olarak pomza taşı kullanılarak elde edilen taşıyıcı hafif betonun mekanik özellikleri araştırılmıştır. Çalışmada, basınç dayanımı, yarmada çekme dayanımı ve ultrasonik ses geçirgenlik (USG) deneyleri 3, 7, 14 ve 28 günlük numunelere uygulanmıştır. Numunelerin hazırlanmasında ince agrega olarak nehir kumu, kaba agrega olarak ise pomza taşı kullanılmıştır. SD ağırlıkça CEM I 42.5 N çimentosu ile % 10 oranında yer değiştirilmiştir. Çalışmadan elde edilen sonuçlara göre silis dumanı katkılı beton (SDB) numunelerin her yaşta kontrol betonuna (KB) göre daha iyi dayanım özellikleri sergilediği görülmüştür. KB numuneleri ilk yaşlarda SDB numuneleri ile benzer özellikler sergilerken özellikle 7 günlük kür süresinden sonra SDB numunelerinde belirgin bir dayanım artışı gözlenmiştir.

The investigation of the mechanical properties of structural lightweight concrete with silica fume admixture

This paper reports results of a study conducted to evaluate the investgation of the mechanical properties of lightweight concrete made with pumice as aggregate and silica fume (SD) as mineral admixture. In the study, the tests of compressivc strength, split tensile strength and ultrasonic pulse velocity were applied lo the samples whose ages are 3, 7, 14 and 28 days. Pumice stone was used as coarse aggregate and natural sand as line aggregate in specimens prepared. SD was replaced with 10 % of CEM I 42.5 N by weight. According to the outputs ofihe studs it was observed that the strength properties of concrete specimens (SDB) prepared with SI' is better than control concrete (KB) specimens. While in the first days the KB specimens showed similar properties with the SDB, After 7 days the SDB specimens showed higher strength.

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