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Finding a solution to a sticky (tarry) problem

机译:找到一个解决一个粘性(住)的问题

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摘要

Many of New Zealand's older roads and state highways contain carcinogenic coal tar in their sub-layers. With these roads and streets fast approaching the end of their useful lives, ways need to be found to reuse (or dispose of) the coal tar-contaminated materials.Coal tar binders were widely used in road construction in New Zealand until the 1970s. These road materials can contain over 1000 times more polycyclic aromatic hydrocarbons (PAHs) than bitumen pavements, and have been identified as a major source of PAHs in both Christchurch's and Auckland's waterways. In Christchurch alone it is estimated that around half of the city's streets are affected.
机译:新西兰的许多旧的道路和状态高速公路含有致癌的煤焦油子层。接近结束的时候有用的生活,方式需要重用(或处理)煤炭tar-contaminated材料。被广泛应用于道路建设在新的吗新西兰,直到1970年代。包含超过1000倍的多环芳烃碳氢化合物(多环芳烃)比沥青路面已确定是多环芳烃的主要来源克赖斯特彻奇和奥克兰的水道。克赖斯特彻奇独自估计一半的城市的街道上都受到影响。

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