MATEC Web Conf.
Volume 281, 2019International Conference of Engineering Risk (INCER 2019)
|Number of page(s)||6|
|Section||Civil Infrastructures: Bridges, Structures, Dams|
|Published online||21 May 2019|
Failure risk of recycled aggregates concrete
1 Institut de Recherche en Génie Civil et Mécanique, GeM-UMR 6183, Centrale Nantes – Université de Nantes – CNRS, 1 rue de la Noe, 44321 Nantes, France
2 Shenzhen University, 3688 Nanhai Ave, Nanshan Qu, Shenzhen Shi, Guangdong Sheng, China
* Corresponding author: email@example.com
In the sustainable development context, the use of demolition waste increases in the building industry. Recycled aggregates from the demolition of concrete structures are then mixed in new concrete. Furthermore, the performance evaluation of a these recycled aggregate concrete (RAC) mix is not only limited to the determination of its conventional mechanical properties. The failure risk of concrete elements in structures made from RAC needs a comprehensive analysis. For that, a study on the fracture process of RAC has been performed and compared with that of normal concrete of the same structural class. Acoustic emission technique and digital correlation method have been used to follow the cracking process. Also, a new modelling approach for the fracture behaviour of RAC at the mesoscopic scale has been developed. It has taken into account the old attached mortar surrounding recycled aggregates. Results show that RAC has a more brittle behaviour than ordinary concrete and the numerical analysis shows that cracks growth through the recycled aggregates which have brittleness behaviour.
© The Authors, published by EDP Sciences, 2019
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