DYMAT 2009
Volume 1, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 503 - 509
Section Experimental Techniques
Published online 15 September 2009
DYMAT 2009 (2009) 503-509
DOI: 10.1051/dymat/2009072

A study of dynamic behavior of the autoclaved aerated concrete

R. Belouettar1 and J.R. Klepaczko2

1  Laboratory of Civil Engineering, Université de Annaba, BP. 12, Annaba, Algérie
2  Laboratory of Physics and Mechanics of Materials, UMR CNRS 75-54, Université de Metz, Ile du Saulcy, 57045 Metz Cedex, France

Published online: 15 September 2009

This work presents an experimental study on the dynamic behavior of autoclaved aerated concrete. The paper reports a series of tests with a Hopkinson Pressure Bar [Hopkinson B., Phil. Trans. Royal Soc. London, A 213. (1913), pp. 437 and Davies R.M., Phil. Trans. Royal Soc. London, A240 (1948), pp. 375.] applied to the direct impact technique [Klepaczko J.R., Advanced experimental techniques in materials testing, Ch.6 in New Experimental Methods in Material Dynamics and Impact, eds. W.K.Nowacki and J.R.Klepaczko, IFTR, Warsaw, (2002), pp. 223.]. Several strain rates were applied varying from quasi-static to impact between 1.4×102 s−1 to 103 s−1. Two states of the aerated concrete were tested, that is dry and saturated with water. In general, an increase of strain rate causes an increase of the critical failure stress for such materials. In the quasi-static range and up to certain critical impact velocity VC the autoclaved aerated concrete shows a positive strain rate sensitivity However, when a critical impact velocity VC is reached a very specific behavior is observed, that is the cell structure is pulverized near the plane of impact. This effect is completely new.

© EDP Sciences 2009