Marine debris is a serious and worldwide environmental problem. In particular, most marine debris is comprised of plastics, which decompose in natural conditions for decades to hundreds of years. They have been distributed across the ocean since the 1970s. Marine plastics have a very low recycling rate due to concerns associated seawater and attachment of microorganisms. Collected plastics are subjected to a pre-treatment process that is not efficient due to the heat generated during grinding. For this reason, cryogenic grinding using liquid nitrogen has been developed. In this study, they were applied to concrete as a marine waste treatment method. In particular, the waste existing in bulk was subjected to cryogenic grinding to evaluate the strength of the concrete according to the particle size. Two types of fiber and two types of bulk plastics that account for a significant portion of marine plastics were tested to evaluate the resulting performance of the concrete. The exper...

中文翻译：

---

再生塑料废塑料的压缩性能评估

海洋垃圾是一个严重的全球性环境问题。特别是，大多数海洋垃圾都是由塑料组成，这些塑料在自然条件下会分解数十年至数百年。自1970年代以来，它们已经分布在整个海洋中。由于担心海水和微生物的附着，船用塑料的回收率非常低。由于研磨过程中产生的热量，对收集的塑料进行的预处理过程效率不高。因此，已经开发了使用液氮的低温研磨。在这项研究中，它们作为海洋废弃物处理方法被应用于混凝土。特别是，将散装存在的废物进行低温研磨，以根据粒径评估混凝土的强度。测试了两种纤维和两种散装塑料（占船用塑料的很大一部分），以评估混凝土的最终性能。专家...