Method and device for mechanical testing of civil engineering structure surfacings
AssigneeCentre Experimental De Recherche et D'Etudes Du Batiment
InventorJean Paquet
Life of this patent
Estimating the term…
Abstract
The method comprises the determination of at least one signature (2a) of the response to an impulse shock of a sound reference coating or covering, and a plurality (2b-2i) of signatures of the response of an impulse shock to a covering having sample defects in order to establish reference signatures. The covering to be controlled is subjected at a plurality of test points (Pi) to at least one impulse shock test in order to determine the corresponding measurement signatures (MSi). A comparison of the measurement signatures with the reference signatures makes is possible to identify defects by resemblance criteria. Application to the control of coatings of traffic roads such as motorways for motor vehicles and runways for aircraft.
Claims18
Method for mechanical testing of civil engineering structure surfacing, characterised in that it comprises:
- establishing at least one signature (a) of the response of a reference sound surfacing to an impulse impact,
- establishing a plurality of signatures 2b-2i) of the response to a calibrated impulse impact of a surfacing of the same type in which reference sample defects have been formed, said signatures relating to the reference sound surfacing and to the surfacing comprising the sample defects constituting reference signatures,
- submitting a plurality of specific points (Pi) on said surfacing to be tested to at least one impulse impact in order to determine the signature (SMi) of the impulse response at each of said specific points (Pi),
- comparing the impulse response signatures of said points to reference measurement signatures (2a-2i) established by said calibrated impulse impacts to thereby establish an identification based on resemblance criteria.
Device for mechanical testing of civil engineering structure surfacings, characterised in that it comprises:
- a mobile support (3) adapted to be moved (T) across the surface of the surfacing,
- percussion means (Mi) disposed on the support (3), said means (Mi) serving to generate sequential calibrated test impacts on said surface of the surfacing,
- sensor means (Ci) fastened to the mobile support, said sensor means being mechanically decoupled from the support (3), said sensor means (Ci) serving to deliver an electrical signal representative of the impulse response of the surfacing to the calibrated test impacts.
Dependencies are inferred from the claim text.