Vol. 22 No. 2 (2007)

Original Research

• Railway sleepers made of alkali activated fly ash concrete

  Ángel Palomo, Ana Fernández-Jiménez, Cecilio López-Hombrados

  75 - 80

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• Application of the safety theory to the design of foundations in sands. Checkup of the linear limit

  Ana Virginia González Cueto Vila, Gilberto Quevedo Sotolongo

  81-88

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• Estimating large complex projects

  Keith Molenaar, Cliff Schexnayder, Jennifer Shane

  91 - 98

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• Risk assessment models for road tunnels in operation

  Germán Martínez-Montes, José del Cerro-Grau, Javier Alegre-Bayo, Javier Ordóñez-García

  101 - 110

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• Pozzolanic binder constituted by lime and cane sugar straw ash: the granulometric influence of its components in the agglomerate activity

  Lesday Martínez Fernández, Rafael Quintana Puchol, José Fernando Martirena Hernández

  113 - 122

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• Effect of drying under service environment on the mechanical properties of structural lightweight concretes

  Patricio Tapia, Carlos Videla

  123 - 137

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• Gravity methods as a tool to calculate greenhouse gas emissions from road traffic in urban planning

  Sergio Zubelzu Mínguez, Alfonso López Díaz, Miguel Ángel Gutiérrez García, Fernando Blanco Silva

  187 - 207

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