Effect of delayed placement of layers on permeability and durability of roller-compacted concrete containing fly ash
Küçük Resim Yok
Tarih
2023
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francis Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Interlayer cold joint formation in roller compacted concrete (RCC) structures is inevitable because of typically applied in layers. In this study, the effect of interlayer cold joint formation on the water absorption and freeze-thaw resistance of RCC with fly ash was investigated. After the first layer of specimens is placed and compacted, the second layer was cast with a delay of 0, 60, 120 and 180 min in order to investigate the cold joint effects. In addition, RCC specimens were produced by applying the mortar between the layers to prevent interlayer cold joint formation. Water absorption and freeze-thaw experiments were performed on RCCs. According to the test results, cold joint formation arising from prolongation of delay increased the water absorption of RCCs and reduced freeze-thaw resistance. However, the application of mortar is an effective method to overcome the interlayer cold joint. Besides, partial substitution of aggregate with fly ash in mixtures improved the workability, impermeability, strength and freeze-thaw resistance of RCC. However, although partial replacement of the cement with fly ash improved the workability and freeze-thaw resistance of some of RCC mixtures, it increased the water absorption and decreased the compressive strength.
Açıklama
Anahtar Kelimeler
Roller compacted concrete, cold joint, water absorption capacity, freeze-thaw resistance
Kaynak
International Journal of Pavement Engineering
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
24
Sayı
2
