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4. Conclusion
To complete a concrete pouring operation, form stripping must be properly controlled to ensure the required aesthetic and structural qualities. The various existing contractual texts (DTU 21, fascicule 65 and FD P 18-503) provide acceptance criteria. These are based on flatness P, texture E and shade T. Depending on the increasingly stringent requirements, the execution specifications will include the choice of a robust concrete formula, a homogeneous forming skin, a sufficiently surface-active release agent, and a concreting plan that may include special provisions for vibration.
Of course, the completion of a test element remains the "justice of the peace" for taking into consideration the conditions under which the work was carried out, and the quality of the facings obtained.
Flatness is a geometric criterion expressed...
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Bibliography
Standards and norms
- Exécution des structures en béton : complément national à la norme NF EN 13670. - NF EN 13670/CN -
- Building work – Execution of concrete structures. - NF DTU 21 -
- Concrete surfaces and facings – Identification details. - FD P 18-503 -
- Exécution des ouvrages de génie civil en béton. - Fascicule N° 65 -
- Additives – Curing products for concrete and mortar – Definition, specifications...
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