Read e-book online Performance-based specifications and control of concrete PDF

By Hans Beushausen, Luis Fernandez Luco

This paintings provides an outline of vital examine from contemporary years pertaining to performance-based layout and quality controls for concrete toughness and its implementation. In engineering perform, functionality ways are frequently nonetheless utilized in blend with prescriptive necessities. this can be mostly simply because, for many sturdiness attempt tools, enough useful adventure nonetheless needs to be received prior to engineers and proprietors are ready to totally depend on them.

This publication, compiled by means of RILEM TC 230-PSC, is meant to help efforts to effectively construct the root for the entire implementation of performance-based methods in the course of the alternate of correct wisdom and adventure among researchers and practitioners worldwide.

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Extra info for Performance-based specifications and control of concrete durability : state-of-the-art report RILEM TC 230-PSC

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The choice of the structural class is up to each country to decide. For a design working life of 50 years the recommended structural class is S4 (highlighted in the table in bold font). 8 or if more than 4 % air is entrained: reduce by 1 structural class; • Structural members with slab geometry: reduce by 1 structural class; • Special quality control of concrete production: reduce by 1 structural class. g. coating) is used, but no values for these reductions are established in the standard (refers to the national annexes).

Nevertheless, some national standards have already started to include performance requirements on top of the prescriptive ones that are still present. 2-04 includes requirements of maximum values of Coulombs (ASTM C1202) for certain exposure and service life conditions. The Swiss Standards SIA 262 and 262/1, possibly the most advanced in the world in 3 Prescriptive Durability Specifications 21 terms of performance requirements, specify maximum values of water sorptivity or chlorides diffusivity (depending on the exposure classes) on cast specimens and of air-permeability measured on site.

6. Nilsson L-O. Modelling of chloride ingress, WP4 Report of EU-Project ChlorTest, G6RD-CT-2002-00855, 112 pp, 2006. 7. Djerbi A, Bonnet S, Khelidj A, Baroghel-Bouny V. Influence of traversing crack on chloride diffusion into concrete. Cem Concr Res. 2008;38(6):877–83. 8. Kamali-Bernard S, Bernard F. Effect of tensile cracking on diffusivity of mortar: 3D numerical modelling. Comput Mater Sci. 2009;47(1):178–85. Chapter 3 Prescriptive Durability Specifications R. Torrent, R. d’Andréa, A. Gonçalves, F.

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