Non-Destructive Evaluation Of Deteriorated Reinforced Concrete Slab Using Experimental And Numerical Methodologies

This study concerns the NDT characterization by micro-seismic technique of a reinforced concrete slab exposed in high temperature, creating a decreasing damage thought the thickness. The dimensions of the slab were equal to 1.20 x 1.10 x 0.12 m (L x W x T). A welded wire mesh (200x200x10) and an OPC concrete reaching at 28 days a compressive strength of 32.7 MPa and a static modulus of elasticity of 35 GPa were used for the slab. At the age of two months, the slab was fixed instead of the door of a high volume furnace; it was heated until the exposed face had reached 300 degrees C then cooled to room temperature. During heating, the temperature gradient through the concrete thickness reached more than 16 degrees C/cm.