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Bond strength of reactive powder concrete
The increase of concrete strength contributes to improving its bond to steel reinforcement, for both passive and active reinforcement. Analysis of bond characteristics conducted by several authors shows a good correlation between bond quality and concrete strength. Reactive Powder Concrete (RPC) with compressive strengths above 200 MPa was used to study the bond characteristics of ultra-high-strength fiber-reinforced concrete on different steel reinforcements. Prestressing wires of 5 mm in diameter and 12.5 mm (T13) strands were used to study the bond properties and required transfer lengths. The influence of ribs of different geometry on the bond properties was characterized. A total of 45 specimens were tested. It was shown that the high compressive strength and fracture energy of RPC, together with a particle size limited to 0.5 mm, lead to the improvement of the bond strength as compared with conventional or high-strength concrete. Pull-out tests carried out on prestressing steel wires of 5 mm in diameter with ribs of 0.1 mm in depth resulted in bond strengths above 35 MPa.
Bond strength of reactive powder concrete
The increase of concrete strength contributes to improving its bond to steel reinforcement, for both passive and active reinforcement. Analysis of bond characteristics conducted by several authors shows a good correlation between bond quality and concrete strength. Reactive Powder Concrete (RPC) with compressive strengths above 200 MPa was used to study the bond characteristics of ultra-high-strength fiber-reinforced concrete on different steel reinforcements. Prestressing wires of 5 mm in diameter and 12.5 mm (T13) strands were used to study the bond properties and required transfer lengths. The influence of ribs of different geometry on the bond properties was characterized. A total of 45 specimens were tested. It was shown that the high compressive strength and fracture energy of RPC, together with a particle size limited to 0.5 mm, lead to the improvement of the bond strength as compared with conventional or high-strength concrete. Pull-out tests carried out on prestressing steel wires of 5 mm in diameter with ribs of 0.1 mm in depth resulted in bond strengths above 35 MPa.
Bond strength of reactive powder concrete
Cheyrezy, M. (author) / Roux, N. (author) / Behloul, M. (author) / Ressicaud, A. (author) / Demonte, A. (author)
1998
4 Seiten, 5 Bilder, 6 Quellen
Conference paper
English
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