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首页> 外文会议>International conference on cold regions engineering >Waste Management to Storm Water Management: The use of recycled plastics in storm sewer production
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Waste Management to Storm Water Management: The use of recycled plastics in storm sewer production

机译：从废物管理到雨水管理：在雨水管道生产中使用再生塑料

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The idea of recycling plastics is not new. For decades various organizations have promoted the recycling of many materials, including plastic. However, despite these efforts we as a society need to dramatically increase the amount of plastics we recycle. The US EPA estimates that approximately 64 billion pounds of plastic waste is generated per year, based on 2011 data. This accounts for approximately 12% of the total municipal solid waste. If you assume an average density of plastics as 1.5 g/cm3 (93.64 pcf) this would equate to approximately 683 million cubic feet of plastic waste. Currently the recycling rate on plastic materials is only about 8.3%. This is one of the lowest rates out of all material classes. On average municipal solid waste as a recycling rate of 34.7%, this means that plastics are falling behind the curve. With a recycling rate of 8.3% there is currently 626 million cubic feet of plastic waste that is being sent to landfills or incinerators. In order to increase the recycling rate of plastics we need to increase the demand for recycled plastic materials on a manufacturing and consumer level. To begin the discussion on recycled plastics one must first look at the very basic classifications for a plastic, is it a thermoset or a thermoplastic. A thermoset resin is a material that cures, hardens or sets into a given shape, generally through the application of heat or curing creating an irreversible chemical reaction in which permanent connections are made between the materials molecular chains. Common thermoset materials are glues, adhesives, rubbers, and electrical insulation. A cured thermoset material will not remelt or otherwise regain the processibility it had before being cured. Curing or setting changes the material forever. While many of these materials can be recycled in a sense, it is really more of a repurposing, such as shredding old tires for use as an athletic track. However, recycling a thermoset to reprocess into a new molded material or a new product similar to its original form is not possible. The easiest way to visualize a thermoset material is to think of an egg. Once it is fried it can never return to the form of a raw egg again.
机译：回收塑料的想法并不新鲜。几十年来，各种组织一直在促进包括塑料在内的许多材料的回收。然而，尽管做出了这些努力，我们这个社会仍需要大幅增加回收利用的塑料量。根据2011年的数据，美国EPA估计每年产生约640亿磅的塑料废物。这约占城市固体废物总量的12％。如果您假设塑料的平均密度为1.5 g / cm3（93.64 pcf），则大约等于6.83亿立方英尺的塑料废物。目前，塑料材料的回收利用率仅为8.3％。这是所有材料类别中最低的比率之一。平均而言，城市固体废物的回收率为34.7％，这意味着塑料落后于曲线。目前，有6.26亿立方英尺的塑料废物被运往垃圾填埋场或焚化炉，回收率为8.3％。为了提高塑料的回收率，我们需要在制造和消费者层面上增加对回收塑料材料的需求。要开始有关再生塑料的讨论，必须首先查看非常基本的塑料分类，即热固性塑料或热塑性塑料。热固性树脂是通常通过施加热量或固化产生不可逆的化学反应，从而在材料的分子链之间建立永久连接的方法，将其固化，硬化或凝固成给定的形状。常见的热固性材料是胶水，粘合剂，橡胶和电绝缘材料。固化的热固性材料不会再固化或恢复到固化前的可加工性。固化或设置会永久改变材质。尽管这些材料中的许多可以在某种意义上进行回收，但实际上更像是重新利用，例如切碎旧轮胎以用作运动跑道。但是，不可能回收热固性塑料以重新加工成类似于其原始形状的新模制材料或新产品。可视化热固性材料的最简单方法是想到一个鸡蛋。一旦被炸，它就永远不会再回到生鸡蛋的形式。

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