In this study, the usability of pumice powder and lime in concrete production as a binding additive for rigid superstructure concrete road pavement was investigated. Following the determination of the optimum binder ratio, these new binder ratios were used in crushed limestone concrete production. The concrete thus formed was named concrete containing cement, pumice powder and lime (PPCC). The normally produced concrete, without pumice powder and lime binder was selected as reference concrete (RC). Regarding the total binder amount of the most appropriate binder ratio 50% was found to be cement, 30% pumice powder and 20% lime in the result of the study. In consequence of the study, the 20 ± 2 °C and 7–28 days compressive strengths of the reference concrete were found to be 33.8 MPa and 38.2 MPa and its bending strengths were 4.2 MPa and 4.7 MPa. The 20 ± 2 °C and 7–28 days compressive strengths of PPCC were found to be 25.1 MPa and 28.3 MPa and its bending strengths were 3.2 MPa and 3.5 MPa. The results of the study showed the usability of PPCC in concrete pavement.
Günümüzde beton yol kaplamaları, çoğunlukla C30/37 betonu gibi normal dayanımlı betonlarla inşa edilmektedir. Bu çalışmada, rijit kaplama inşasında C30/37 betonu yerine, atık çelik lif takviyeli pomza içeren reaktif pudra betonun (P-RPB) kullanılabilirliği araştırılmıştır. Çalışmada, C30/37 betonu, kontrol karışımı olarak seçilmiştir. Bu çalışmada yeni bir beton olan P-RPB betonu üretilmiştir. Çalışmada C30/37 betona, 28 gün 20 o C standart su kürü uygulanmıştır. P-RPB' ye ise, 28 gün 20 o C standart su kürü ve kombine kür olmak üzere 2 farklı kür uygulanmıştır. Çalışma sonucunda; standart su kürü sonrası, C30/37 beton basınç dayanımı 41,8 MPa, eğilme dayanımı 5,0 MPa bulunmuştur. P-RPB'nin 28 gün 20 o C standart su kürü sonrası basınç dayanımı 71,2 MPa, eğilme dayanımı 8,2 MPa bulunmuştur. Kombine kür sonrası P-RPB'nin basınç dayanımı 105,2MPa, eğilme dayanımı 12,5 MPa bulunmuştur. Çalışma sonuçları, P-RPB betonun rijit üstyapı inşasında beton kaplama olarak kullanılabilirliğini göstermiştir.
Reinforced concrete structures such as RC buildings and rigid pavements are exposed to tensions within the impact of repeated loads. Earthquake and wind load could be given as the examples for repeated loads. In this study; compression tests have been conducted under the repeated loads for the attained reinforced concrete samples. Three different samples have been prepared in the study and they have been subjected to compression test. Repetitive compression tests have been applied to each sample and loading has been continued until the concrete is in the status of not being able to bear any more loads. Structure performance analyses have been carried out for the sample reinforced concrete building selected with the use of the concrete compression strengths attained under the repeated loads. The purpose of the study is to reveal how the repeated loads affect the compression strength of the concrete. At what degree these attained concrete compression strengths affect the structure performance has been examined.
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