The high ductility performance of energy-absorbing buffer support materials

In order to study the realization of high ductility performance of foam fiber concrete (FFC) as energy-absorbing buffer support material, a series of samples were prepared based on the optimal mix ratio of orthogonal test. The uniaxial compression test was carried out to obtain the stress-strain curve and energy absorption curve. The strain capacity and macroscopic cracking process were revealed by digital image correlation (DIC). The mechanical performance of the admixture in the process of achieving high ductility performance was captured by scanning electron microscopy (SEM). The test results show that the average strength of FFC in the platform stage is 73.95% of the peak strength, and it can effectively absorb external energy as an energy-absorbing buffer support material. Foam, waste polystyrene particles and PVA fiber were the key factors to realize the high ductility of FFC.