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首页> 外文期刊>Advances in civil engineering >Evaluating the Resistance Performance of the VAEPC and the PAFRC Composites against a Low-Velocity Impact in Varying Temperature
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Evaluating the Resistance Performance of the VAEPC and the PAFRC Composites against a Low-Velocity Impact in Varying Temperature

机译：评估VAEPC的电阻性能和PAFRC复合材料的不同温度下的低速撞击性能

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This paper aims to evaluate the resistance performance of the vinyl acetate ethylene polymer cement (VAEPC) composite and the polyvinyl alcohol fiber-reinforced cement (PAFRC) composite against a low-velocity impact in varying temperature. Their impact resistance performances are analyzed and compared with plain mortar after 28 days of age. Low-velocity impact tests were carried out under the various room temperatures of ?70°C, 70°C, and 140°C. Also, an INSTRON CEAST 9350 drop-tower system has been used to get the impact load, fracture energy, and displacement of the specimens while loading low-velocity impacts. From these tests, the failure pattern, shape, and strength of each test specimen were evaluated for the VAEPC, the PAFRC composite, and the plain mortar. Those test results showed that the flexural strength of both the VAEPC and the PAFRC composites has increased compared to that of the plain mortar. However, the compressive strength of the PAFRC composite decreased slightly after 28 days, while its flexural strength increased by 24.4% compared to that of the plain mortar. In addition, the drop test results show that PAFRC composite specimens have the highest impact fracture energy compared to other specimens at ?70°C, 70°C, and 140°C, whereas plain mortar specimens have their lowest. This is because the PVA fiber included in the PAFRC acts as a bridge to suppress crack propagation and to improve energy absorption performance, which helps it resist relatively better against impact. It is also known that while the VAEPC composite and the plain mortar were destroyed in a form of being perforated, the specimens of PAFRC composite were observed to some extent to suppress the perforation failures. Therefore, under a load of low-velocity impact, the resistance performance of the VAEPC composite and the plain mortar was proven to show brittle fracture behavior, while the PAFRC showed ductile fracture behavior in virtue of PVA fiber reinforcement which improved its flexural performance. According to the SEM observation which followed the tests, the PAFRC composite as a fiber-reinforced material of the hydrophilic material was found to show the most excellent interfacial bond adhesion compared to the other composite and the plain mortar. The PAFRC composite manufactured in the study has been proven to be very useful as a reinforcement material in both high and low temperature environments.
机译：本文旨在评估乙酸乙烯酯乙烯聚合物水泥（VAEPC）复合材料和聚乙烯醇纤维增强水泥（PAFRC）复合材料在不同温度下的低速撞击中的电阻性能。分析它们的抗冲击性能并在28天后与普通砂浆进行比较。低速冲击试验在70℃，70℃和140℃的各种室温下进行。此外，Instron CAPT 9350滴塔系统已被用于获得撞击载荷，断裂能量和标本的位移，同时加载低速冲击。从这些测试，对VAEPC，PAFRC复合材料和普通砂浆评估每个试样的故障图案，形状和强度。那些测试结果表明，与普通砂浆相比，VAEPC和PAFRC复合材料的抗弯强度增加了。然而，与平原砂浆相比，PAFRC复合材料的抗压强度略微降低28.4％。此外，下降试验结果表明，与其他试样相比，PAFRC复合样品具有最高的冲击骨折能量，而α0℃，70℃和140°C，而普通砂浆标本具有最低的状态。这是因为PAFRC中包含的PVA纤维充当桥梁以抑制裂纹传播，并提高能量吸收性能，这有助于其抵抗对抗的影响。还已知，虽然VAEPC复合材料和普通砂浆以穿孔形式破坏，但在一定程度上观察到PAFRC复合材料的标本抑制穿孔失败。因此，在低速冲击的载荷下，证明了VAEPC复合材料和普通砂浆的电阻性能以显示出脆性断裂行为，而PAFRC凭借PVA纤维增强件，可提高其抗弯性能的延性断裂行为。根据测试的SEM观察，发现与其他复合材料和普通砂浆相比，发现PAFRC复合材料作为亲水材料的纤维增强材料，表明最优异的界面粘合粘附。在该研究中制造的PAFRC复合材料已被证明是高温和低温环境中的加固材料非常有用。

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