## 1 Introduction  
Cement-based material, such as concrete, is brittle and is easily damaged by impact load with a few blows [1, 2]. Thus, various fibers, e.g. steel fiber, polypropylene fiber, and carbon fiber, are added into the mixture to improve its impact resistance. The effects of the cellulose, polypropylene, and steel fibers on the impact resistance of the cement-based material were studied by [PERSON] [3], among which the effect of steel fiber was the most significant. The mean failure blows were increased from 48 to 228 after steel fibers were added. [PERSON] et al. [4] conducted the drop-weight test on steel fiber-reinforced concrete. It was known from the test that the failure blows increased with the increase of the steel fiber volume content. The impact resistance of the concrete with steel fiber volume content of 1.5% was about 20-25 times to the one of its plain counterpart. [PERSON] et al. [5, 6] used the steel fibers to improve the impact resistance of light weight aggregate concrete. The mean failure blows were increased by 13 times when the steel fiber volume content was 2%. [PERSON] et al. [7, 8] reinforced the self-compacting concrete with the regenerated carbon fiber and the recycled glass fiber. The impact resistance increased 6.48 times for the cylinder specimens with regenerated carbon fiber content of 1.25% and 6.14 times for the ones with regenerated glass fiber volume content of 1.25%. These research results states clearly that the impact resistance of concrete can be improved after fibers are introduced into the specimen. This is possibly attributed to that the fibers can improve the tensile toughness of concrete [9]. When the fiber-reinforced concrete fails under the tensile load, it reached a large strain [10; 11]. So much more blows are needed for the fiber-reinforced concrete under the impact load. Cement-based material reinforced by polyvinyl alcohol fiber (PVA-FRCM) is tough [12] and its ultimate strain can exceed 3% under uniaxial tensile load. Its extreme tensile strain capacity is hundreds of times larger than the one of plain concrete. [PERSON] et al. [13; 14] conducted the uniaxial tension test to measure the stress versus strain curves of PVA-FRCM. Results showed that the tensile strain capacity exceeded 4%. The same strain level of PVA-FRCM was realized by [PERSON] et al. [15] and [PERSON] et al. [16]. Due to the higher tensile deformation capacity, the impact resistance performance of PVA-FRCM was better. [PERSON] et al [17] reported a drop-weight tower test on a PVA-FRCM square-shaped panel. The results showed that a longer segment of plastic yielding appeared. The generation of cracks was delayed, and the surface of panel exhibited multiple micro-cracks under the quasi-static load. [PERSON] et al. [18; 19] conducted the Charpy U-notch test to assess the impact energy absorption capacity of PVA-FRCM. It was found that the absorbed energy increased when the PVA fibers were added to 0.9% volume content, and then it started to decrease when the fiber volume content reached from 0.9% to 1.2%. [PERSON] et al. [20; 21] analyzed the impact behavior of PVA-FRCM by the Hopkinson bar test method. Due to the large amount of micro-cracks, its impact energy absorption capacity was higher. [PERSON] et al. [22] employed Charpy impact experiments to study the influences of fiber volume content on the impact energy absorption capacity of PVA-FRCM. Compared with the plain ones, when the polyvinyl alcohol (PVA) fiber volume content reached 0.5%, 1.0%, 1.5%, and 2.0%, the absorbed impact energy was increased by 7%, 8%, 11%, and 36%, respectively. The literature introduced above shows that fibers can improve the impact resistance of concrete. Especially PVA-FRCM, its impact energy absorption capacity is higher due to its multiple micro-cracks characteristics.