Bonded Cement-Based Material Overlays for the Repair, the by J.-L. Granju, B. Bissonnette, L. Courard (auth.), Benoît

By J.-L. Granju, B. Bissonnette, L. Courard (auth.), Benoît Bissonnette, Luc Courard, David W. Fowler, Jean-Louis Granju (eds.)

Among assorted techniques that may be thought of for concrete rehabilitation, bonded overlays are usually the main low-cost substitute. the first objective of overlays is to increase the lifetime of the candidate buildings, both via restoring the standard and integrity of the outside and/or the re-establishing or enhancing the load-carrying skill. however, the sturdiness of bonded overlay platforms nonetheless attracts issues within the technical group due to bond sustainability difficulties encountered in a few circumstances. at the moment, there's nonetheless no approved layout technique or method that may warrant the practitioner a profitable final result of the fix. This State-of-Art file summarizes the findings with admire to all features fascinated with the protecting process.

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Extra resources for Bonded Cement-Based Material Overlays for the Repair, the Lining or the Strengthening of Slabs or Pavements: State-of-the-Art Report of the RILEM Technical Committee 193-RLS

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Concrete Mixture Optimization, Concrete International, American Concrete Institute, Farmington Hills, Michigan, pp. 33–39, June 1990. 4. , Performance-Based Concrete Mixtures and Specifications for Today Making the Best Use of Local Materials to Reduce Costs, Concrete International, American Concrete Institute, MI, Vol. 24 No. 2, February 2002. 5. , 92-MPa Air-entrained HPC, TRB-Record 1698, Concrete 2000, p. 24, 2000. 6. , A Study of the Effects of Interface Condition on Thin Bonded PCC Overlays, Research Report 357-1, Center for Transportation Research, The University of Texas at Austin, October 1984.

In any case, it should be equal to the recorded substrate tensile strength. Optic Fibres If accessible cavities are present, video endoscopes can be used for investigations. A fibre optic probe consisting in flexible optical fibres, lens and illuminating system is inserted into drilled hole, cracks, voids, etc. [12]. Observation of invisible parts of the structures can be performed, with the possibility of multidirectional observation and record by means of a camera. 2 Non-Destructive Tests for Flaw Detection and Condition Assessment The other types of NDT methods are those for flaw detection and condition assessment.

16). 3 Condition Evaluation of the Existing Structure Prior to Overlay 43 Fig. 16 Water capillary suction between 0–60 seconds on sandblasted, polished concrete surface and limestone [28] An impregnation rate calculated between 0 and 20 seconds is an interesting discriminator parameter for the evaluation of transport kinetics and liquid migration at the interface. 11 illustrates the different behaviour of samples prepared by sandblasting and polishing, as well the low absorption rate of limestone [28].

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