Experimental Study On The Mechanical Behavior Of Foam Filled Concrete Under Impact Compression/Shear Loading

Due to its low density and wide-range designable strength, foam concrete was widelyused as one of the thermal insulation materials and cushioning energy-absorbing materials. Inrecent years, in order to solve the casualties and property losses caused by the aircraft skiddedoff the runway, this material was used in Engineering Material of Arresting System (EMAS),so as to pull over the overran runway aircraft through its energy-absorbing characteristics,thereby reducing the harm. In this application, the foam concrete subject to the rolling impactof aircraft wheel, this rolling effect is different from the usual shock axial impact loading; anddue to the existence of a large number of voids, being exposed to open air, and being soakedin the rain, the rate of aging significantly increase. As a result, pavement for aircraft arrestingsystems needs to be replaced frequently, which cannot meet the requirements of the economyand durability. In this paper, polystyrene granules (EPS) were added to the concrete mortar tomake Foam-Filled Concrete (FFC), the holes in the foam concrete were filled with EPSparticles. The quasi-static compression and impact compression-shear mechanical propertieswere studied. In addition, the effect of different particle sizes of adopting EPS particles on themechanical properties of materials was investigated. The results of this paper give afundamental data for the application of FFC in EMAS. Specific studies include:(1) Study and design the mix ratio of FFC and its production process; carry out quasi-staticcompression experiments; study the effects of EPS volume content (specimen density) andEPS particle size on the quasi-static compressive mechanical properties.(2) Study the mechanical properties and energy absorption characteristics of FFC underimpact compression loading by use of a drop hammer device. investigate the effects of EPSvolume fraction (specimen density), EPS particle size and velocity of drop weight on theimpact mechanical properties; A high speed camera was used to capture the destructionprocess of the specimens so as to study the impact failure mechanism.(3) Study the mechanical properties and energy absorption performance of FFC undercompression/shear complex loading; design quasi-static compression-shear and impactcompression-shear test devices; study the quasi-static and impact compression-shear mechanical properties through this device; analyze the effects of compression-shear angle,EPS volume fraction (specimen density) and particle size on the mechanical properties ofFFC.