Journal Published Online: 01 December 2002
Volume 24, Issue 2

Non-Destructive Tests for the Evaluation of Concrete Exposed to High Temperatures

CODEN: CCAGDP

Abstract

This paper presents a discussion on the use of non-destructive tests (NDT) for the evaluation of concretes damaged by exposure to high temperatures. The main analysis is based on the relationships between strength, modulus of elasticity and ultrasonic pulse velocity. Rebound hammer, break-off, and resonant frequency were also used. Tests were performed on concretes, prepared with different types of coarse aggregates and cements, with strength levels between 20 and 60 MPa. Exposure variables included maximum temperature (150°C to 700°C), time of exposure and the cooling rate. The obtained results indicate that, contrary to what happens with strength, the ultrasonic pulse velocity is a very good tool for the estimation of the static modulus of elasticity of thermally damaged concretes.

Author Information

Di Maio, A
CONICETLEMIT, La Plata, Argentina
Giaccio, G
CIC-LEMIT, La Plata, Argentina
Zerbino, R
CONICET-LEMIT, La Plata, Argentina
Pages: 10
Price: $25.00
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Details
Stock #: CCA10530J
ISSN: 0149-6123
DOI: 10.1520/CCA10530J