Vol. 20 No. 1 (2005)

Original Research

• Constructive aspects of the tunnels of the high speed rail line Córdoba-Málaga (Spain) in the valley of Abdalajis

  Mª Carmen Rubio, Germán Martínez, Javier Ordóñez, Javier Alegre

  5-14

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• The synthetics fibers effect in the concrete plastic properties

  Julio Portella Montardo

  15-24

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• A construction project planning tool based on unit price estimating

  Jesús Zaragoza, José González, José Díaz

  27-32

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• Utilisation of recycled concrete as replacing of coarse aggregate for the concrete manufacturing

  Carlos Aguilar, María Pía Muñoz, Oscar Loyola

  35-44

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• Application of modified cam-clay model to reconstituted clays of the sabana de Bogotá

  Javier Camacho, Oscar Reyes

  47-58

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• National Colombian roadway bridges rehabilitation, based on visual inspections, specialized studies and repair strategies

  Edgar Muñoz, Rafael Hernández, Edgar Valbuena, Luz Trujillo, Libardo Santacruz

  61-84

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