IMPACT RESISTANCE CAPACITY OF A GREEN ULTRA-HIGH PERFORMANCE HYBRID FIBRE REINFORCED CONCRETE (UHPHFRC): EXPERIMENTAL AND MODELING STUDY

R. Yu, P. Spiesz, H.J.H. Brouwers

Abstract: This article addresses the impact resistance capacity of a green Ultra-High Performance Hybrid Fibre Reinforced Concrete (UHPHFRC). The design of concrete mixtures is based on the aim to achieve a densely compacted cementitious matrix, employing the modified Andreasen & Andersen particle packing model. The modified Charpy test device is employed to test the energy absorption ability of the UHPHFRC under the external impact loading. The results show that the long steel fibres play a dominating role in improving the impact resistance capacity of the UHPHFRC. Additionally, the failure mechanism of the UHPHFRC under impact loading is analyzed and modeled. The proposed model can well predict the energy absorption ability of the UHPHFRC samples.

Keywords: Ultra-High Performance Hybrid Fibre Reinforced Concrete (UHPHFRC), green concrete, impact resistance, modeling

DOI: https://doi.org/10.15623/ijret.2014.0325026