回收塑料改性青混合物的工程性能,微塑料和排放评估
Yeong Jia Boom1, Dai Lu Xuan1, Marie Enfrin1
1Civil and Infrastructure Engineering, Royal Melbourne Institute of Technology (RMIT) University, 124 La Trobe St, VIC 3001, Melbourne, Australia.
The Science of the total environment
|June 17, 2023
概括
青中的回收塑料提高了道路的耐用性,改善了疲劳和路的抵抗力. 这种可持续的方法还可以减少生产过程中的排放,提供双重工程和环境效益.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 土木工程 土木工程是指土木工程.
背景情况:
- 越来越多的人对可持续的道路建设感兴趣.
- 在工程性能和青中再生塑料对环境的影响之间存在有限的相关性.
- 需要评估整合回收塑料的机械行为和环境影响.
研究的目的:
- 评估使用回收塑料 (低密度聚乙烯和混合聚乙烯/聚烯) 修改的青的机械行为.
- 评估在青中使用回收塑料对环境的影响,包括气体排放和微塑料的产生.
- 为了比较性能和环境影响与传统的热混合青 (HMA).
主要方法:
- 将低点回收塑料纳入常规热混合青中.
- 机械测试,以评估耐湿性,耐疲劳性和耐腐蚀性.
- 在高温青生产过程中对气体排放的分析.
- 微塑料生成与商业聚合物改性青的比较.
主要成果:
- 耐湿性随着塑料含量增加而下降了5-22%.
- 与HMA相比,耐疲劳性增加了150%,耐磨性增加了85%.
- 随着塑料含量增加,气体排放量减少了多达21%.
- 微塑料的产生与商业聚合物改性青相当.
结论:
- 回收塑料提供了重要的工程效益,增强了青的疲劳和抗性.
- 在青中使用回收塑料会在生产过程中减少气体排放.
- 微塑料的产生可与现有的行业标准相提并论,减轻了环境问题.
- 回收塑料为青改造提供了一个有希望的可持续替代品,比传统的HMA提供了工程和环境优势.
更多相关视频
05:05Quantification of Polybutylene Adipate Terephthalate-based Micro- and Nano-plastics from Soil Using Proton Nuclear Magnetic Resonance Spectroscopy
Published on: June 6, 2025
270
08:21Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies
Published on: July 27, 2022
4.3K
相关概念视频
01:31Plasticizers
91
Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
91
01:30Superplasticizers
106
Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
106
01:28Effects of Air-entrainment in Concrete
115
Air entrainment in concrete significantly enhances the material's durability, especially in environments subjected to freeze-thaw cycles. Introducing small air bubbles into the concrete mix acts as internal voids that accommodate the expansion of water when it freezes, thereby alleviating internal stress and preventing structural cracks. This function is crucial in climates with significant freezing and thawing, as it protects the concrete from repeated stresses that could lead to premature...
115
01:25Deleterious Substances in Aggregate
216
Deleterious substances in aggregates can be detrimental to the quality and durability of concrete. These substances include organic impurities like loam, which interfere with cement hydration and are usually present in the sand. These prevent a good bond between aggregate and cement paste. Organic impurities can be detected using the colorimetric test, where the darkness of a solution after agitation indicates the level of organic content.
Another type of impurity is clay and fine material that...
Another type of impurity is clay and fine material that...
216