A huge amount of rubber waste coming from tire industry or other sources (eg, weather strips producers) has attracted interest from researchers to investigate the possibility of recycling used rubber for various products, particularly in construction sector. This article presents a series of experimental and numerical investigations to evaluate the feasibility of regenerated synthetic rubber ethylene propylene diene monomer (EPDM) for production of a building seismic isolation system. Four rubber blends using two different sources of regenerated EPDM are considered in this study. The mechanical properties of the recycled rubber under study are evaluated through uniaxial tensile and relaxation tests, considering the accelerated aging effect. Based on several hyperelasticity and viscosity models of rubber available in the literature, several numerical test simulations on rubber compounds and on a prototype of fiber reinforced elastomeric isolators (FREIs) are performed. The test results reveal that the proposed regenerated EPDM compounds can be particularly suitable for the production of unbonded FREIs, especially because they are able to exhibit low/moderate tensile stresses at high‐shear strain. The results also show that not all regenerated rubber blends fulfill the durability requirements of rubber for seismic isolation after accelerated aging tests. The durability of the specimens seems to be mainly affected by the choice of the regenerated rubber source.

中文翻译：

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纤维增强弹性体隔离器用再活化乙烯丙烯二烯单体制得的胶料的数值研究

来自轮胎行业或其他来源（例如，挡风雨条生产商）的大量橡胶废料吸引了研究人员的兴趣，他们研究了将废旧橡胶回收用于各种产品的可能性，尤其是在建筑行业。本文介绍了一系列实验和数值研究，以评估再生合成橡胶乙烯丙烯二烯单体（EPDM）用于生产建筑隔震系统的可行性。本研究考虑使用两种不同来源的再生EPDM的四种橡胶混合物。考虑到加速老化效应，通过单轴拉伸和松弛试验评估了所研究的再生橡胶的机械性能。根据文献中提供的几种橡胶超弹性和粘度模型，对橡胶混合物和纤维增强弹性体隔离器（FREI）的原型进行了一些数值测试模拟。测试结果表明，提出的再生EPDM化合物特别适合于生产未结合的FREI，特别是因为它们能够在高剪切应变下表现出低/中等拉伸应力。结果还表明，并非所有再生橡胶混合物都能满足橡胶在加速老化试验后用于隔震的耐久性要求。样品的耐久性似乎主要受再生橡胶来源的选择影响。测试结果表明，提出的再生EPDM化合物特别适合于生产未结合的FREI，特别是因为它们能够在高剪切应变下表现出低/中等拉伸应力。结果还表明，并非所有再生橡胶混合物都能满足橡胶在加速老化试验后用于隔震的耐久性要求。样品的耐久性似乎主要受再生橡胶来源的选择影响。测试结果表明，提出的再生EPDM化合物特别适合于生产未结合的FREI，特别是因为它们能够在高剪切应变下表现出低/中等拉伸应力。结果还表明，并非所有再生橡胶混合物都能满足橡胶在加速老化试验后用于隔震的耐久性要求。样品的耐久性似乎主要受再生橡胶来源的选择影响。