The objective of this article is to study the validity of the test methods that are currently used to determine the fiber content in samples of rubber powder made from end-of-life tires: CEN/TS 14 243,ASTMD5603-01, and XP T 47-758. For this purpose, rubber powder samples contaminated with one weight percent (wt%) of fiber were prepared and submitted to sieve analyses, with the weight of the sample and sieving time as the variable parameters. The materials used were rubber powder without fibers and polyester fibers from recycled waste tires, both generated during the shredding of the tires. It has been observed that the procedure of determining fiber content based on sieving and extraction of fabric balls does not manage to recover more than 41.00% of the fibers contained in the samples. This research demonstrates that even with different sample weights and sieving times, is not possible to recover 100% of the fiber with which the rubber sample was contaminated. This seems to indicate that it is necessary to develop a methodology that differs from the current practice of sieving and extracting fabric balls to correctly determine the fiber content in a sample of rubber powder.
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机译：本文的目的是研究目前用于确定报废轮胎橡胶粉样品中纤维含量的测试方法的有效性：CEN / TS 14 243，ASTMD5603-01和XP T 47-758。为此目的，制备了被一种重量百分比（wt％）的纤维污染的橡胶粉样品，并将其重量和筛分时间作为可变参数进行筛分分析。所使用的材料是无胶的橡胶粉，以及来自废轮胎的再生纤维，它们都是在轮胎切碎过程中产生的。已经观察到，基于对织物球的筛分和提取来确定纤维含量的程序不能回收超过样品中所含纤维的41.00％。这项研究表明，即使使用不同的样品重量和筛分时间，也不可能100％回收被橡胶样品污染的纤维。这似乎表明有必要开发一种不同于当前筛分和提取织物球的方法的方法，以正确确定橡胶粉样品中的纤维含量。
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