Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Design of Fiber Reinforced Concrete for Pumping
This study was undertaken to develop a positive design procedure for pumpable fibrous reinforced concrete mixes and to provide information on this method for application in tunnel liners. The addition of fiber reinforcement to any combination of fine and coarse aggregates increases the void content of the mix. The incompressible paste content of the mix must exceed the void content so that segregation failure will not occur during pumping. Because of the inherent high void content and harshness of a fiber reinforced concrete mix compared to a plain concrete mix the gradation of the sand is more critical and the steps necessary to design a pumpable mix more detailed. The steps include selection of the aggregates, ratio of fine to coarse aggregate, volume of paste, quantity of water and the cement content. Mixes with four different coarse aggregate maximum sizes, two water reducing admixtures and one phase thickening admixture were studied. These mixes were evaluated in a laboratory testing apparatus designed to model actual pumping conditions.
Design of Fiber Reinforced Concrete for Pumping
This study was undertaken to develop a positive design procedure for pumpable fibrous reinforced concrete mixes and to provide information on this method for application in tunnel liners. The addition of fiber reinforcement to any combination of fine and coarse aggregates increases the void content of the mix. The incompressible paste content of the mix must exceed the void content so that segregation failure will not occur during pumping. Because of the inherent high void content and harshness of a fiber reinforced concrete mix compared to a plain concrete mix the gradation of the sand is more critical and the steps necessary to design a pumpable mix more detailed. The steps include selection of the aggregates, ratio of fine to coarse aggregate, volume of paste, quantity of water and the cement content. Mixes with four different coarse aggregate maximum sizes, two water reducing admixtures and one phase thickening admixture were studied. These mixes were evaluated in a laboratory testing apparatus designed to model actual pumping conditions.
Design of Fiber Reinforced Concrete for Pumping
D. W. Ounanian (Autor:in) / C. E. Kesler (Autor:in)
1976
53 pages
Report
Keine Angabe
Englisch
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