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(Automatic translation)

Auscultation of cracking down asphalt pavements using ultrasound

Miguel Angel FRANESQUI
Department of Civil Engineering. School of Industrial Engineering and Civil (IBD).
University of Las Palmas de Gran Canaria (ULPGC). 
(35017 Las Palmas).

Juan GALLEGO
Road Engineering Research Group. Department of Civil Engineering-Transport. School of Engineers of Roads, Canals and Ports. 
Polytechnic University of Madrid (UPM). (28040 Madrid).

ABSTRACT:

a procedure for identifying cracking initiated at the surface of the solid asphaltic and allows accurate determination with high performance the depth of such cracks using ultrasound techniques, with the possibility of practical application intends to firm in service . The methodology involved the analytical derivation of initial theoretical models ratios wave transmission, then calibrated in situ experimental results in laboratory and being provided its widespread and graphs for routine use in practical applications mathematical expressions. The results would have shown that the methodology proposed nondestructive, fast implementation, low cost and easy implementation, can be applied with sufficient reliability and repeatability of asphalt pavements. The maximum average relative error in estimating the depth of the cracks models has not exceeded 13%, with a confidence level of 95%.

KEYWORDS:

Pavement, Bituminous Firm, Fissure, Cracking, Conservation, descending Cracking, crack depth, nondestructive test, Ultrasound, Firm asphalt.

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