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Additional resources for Concrete Society - Assessment, design and repair of fire-damaged concrete structures(Final Draft)

Sample text

EFNARC(47) provides a model specification for sprayed concrete, with guidelines published separately for the information of specifiers and contractors. Several major suppliers of sprayed concrete and fibres produce their own guidelines and detailed product support, and may be contacted as necessary. A European Standard, BS EN 14487(48) covers sprayed concrete and one for testing, EN 14488(49), is currently being developed; most parts of the latter have been published as British Standards. Sprayed concrete is produced by two processes, wet and dry.

In these cases careful consideration needs to be given to the distribution of loads between the remaining concrete and steel and the new repair materials. 2 Beams and slabs – bending Where appropriate, beams and slabs may be repaired and strengthened to resist the applied bending moments by adding repair concrete and tension reinforcement. 4 amended tensile force which can be resisted by the original tension reinforcement, taking into account the residual strength. The approach is illustrated by Examples 1 and 2 in Appendix B.

Any fabric reinforcement that may be required to hold the repair concrete in place in the temporary condition, including means of supporting the fabric and the required concrete cover. • The thickness and the properties of the repair concrete. 7. Similar details will be used for hand-applied repair materials or concrete cast in formwork. 4 Specifications In addition to the design drawings and details the designer should prepare detailed material and workmanship specifications for the repair work.

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