Experimental Study of Concrete Pavement: Influence of Position of Bar Transfer and Type of Concrete / Estudo Experimental de Pavimentos de Concreto: Influência da Posição da Barra de Transferência e do Tipo de Concreto

AUTOR(ES)

Juliano Rodrigues da Silva

DATA DE PUBLICAÇÃO

2009

RESUMO

This work presents an experimental study of the behavior of transverse joints in unreinforced concrete slabs under elastic support. Due to the tensions caused by loads and volumetric variations in the slab, transverse joints when badly executed can cause a efficiency reduction in the shear transfer, thus reducing the useful life of the concrete pavement. To have a better efficiency in the shear transfer in joints of concrete pavements, 500 mm transfer bars are used with bar diameters varying from 10 mm to 32 mm. These bars are positioned at midheight of the sawed joints spaced at every 300 mm. This research seeks to verify the influence of the positioning of the transfer bars and the influence of different types of concrete on sawed joints of concrete pavements. Three different types of unreinforced concrete were used: conventional concrete, steel fiber concrete and self-compacting concrete. The experimental program consisted of the application of static monotonic loading in nine concrete plates, simulating concrete pavements, with dimensions 2200 mm x 600 mm, with a sawed joint at midlength supported by an elastic rubber layer. The experimental results showed that joints with transfer bars performed much better than those joints without transfer bars and that bars located at midheight perform better than those bars positioned at 45 mm from the base. The concrete types were quite different, however the steel fiber concrete was shown to be more efficient than the other two concrete types, and the conventional concrete was more efficient than self-compacting concrete, probably because aggregate interlock is better in conventional concrete

ASSUNTO(S)

juntas transversais, pavimento rígido de concreto, barras de transferência, fibras metálicas transverse joint, concrete pavements, transfer bars and steel fibers construcao civil

Documentos Relacionados

• Estudo Experimental de Pavimentos de Concreto: Influência da Posição da Barra de Transferência e do Tipo de Concreto
• Joints in concrete pavements: load transfer devices
• Reciclagem total de pavimentos de concreto como agregados para construção de novos pavimentos de concreto: o caso do Rodoanel Metropolitano Mário Covas.
• Study of concrete pavement behavior in bonding condition between concrete slab and cemented or asphalt base.
• Study on the factors affecting load transfer in jointed plain concrete pavements.