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首页> 外文期刊>Transportation Research >Environmental impact assessment of pavement road bases with reuse and recycling strategies: A comparative study on geopolymer stabilized macadam and conventional alternatives
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Environmental impact assessment of pavement road bases with reuse and recycling strategies: A comparative study on geopolymer stabilized macadam and conventional alternatives

机译：重用和回收策略路面道基地的环境影响评价：岩土聚合物稳定型甘达姆和常规替代品的比较研究

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摘要

Geopolymer is a potential solution to the high carbon emissions caused by cement. Life cycle assessment (LCA) methodology was applied in this study to evaluate the environmental impacts of pavement road bases with reuse and recycling strategies. We considered four types of stabilized road base materials to evaluate environmental impacts: waste glass-fly ash based geopolymer stabilized macadam (WFAG), fly ash based geopolymer stabilized macadam (FAG), cement stabilized macadam (CS) and cement-fly ash stabilized macadam (CFAS). Two alkaline activators were used to synthesize geopolymer road base materials. The results showed that the application of geopolymer road bases reduced global warming (GWP) significantly. Comparing with CS, the GWP of WFAG and FAG declined by 17.9% CO2, eq per function unit. The combined alkaline activator consisting of sodium hydroxide (NaOH) and water glass had lower environmental impacts compared to the one with pure NaOH alkaline activator. The ozone layer depletion (ODP) of geopolymer stabilized road bases using pure NaOH solution was an order of magnitude higher than the ODP using the combined alkaline activator consisting of NaOH and water glass. For other indicators except GWP, the environmental impacts of conventional road bases were lower than geopolymer stabilized road bases, indicating a pollution transfer during application of geopolymer road bases.
机译：地缘聚合物是水泥引起的高碳排放的潜在解决方案。本研究中应用生命周期评估（LCA）方法，以评估路面路基与重用和回收策略的环境影响。我们考虑了四种类型的稳定道路基础材料，以评估环境影响：废物玻璃 - 粉煤灰基质的地质聚合物稳定性麦克风（WFAG），粉煤灰基质的地质聚合物稳定的汞adam（FAG），水泥稳定的肺泡（CS）和水泥 - 飞灰稳定的汞代托（CFAS）。两种碱性活化剂用于合成地质聚合物路基材料。结果表明，地缘聚合物道基基的应用显着减少了全球变暖（GWP）。与CS相比，WFAG和FAG的GWP下降了17.9％CO2，EQ每种功能单位。与纯NaOH碱性活化剂的氢氧化钠（NaOH）和水玻璃组成的组合碱活化剂具有较低的环境影响。使用纯NaOH溶液的地质聚合物稳定的道路碱基的臭氧层耗尽（ODP）是使用由NaOH和水玻璃组成的组合的碱性活化剂高于ODP的数量级。对于除GWP之外的其他指标，常规道路基地的环境影响低于地质聚合物稳定的道路基础，表明在盖聚物道基基碱的应用过程中污染转移。

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  • 来源
    《Transportation Research》 |2021年第4期|102749.1-102749.11|共11页
  • 作者

    Zhang Yiyuan; Gong Hongren; Jiang Xi; Lv Xiuyuan; Xiao Rui; Huang Baoshan;

  • 作者单位

    Tongji Univ Key Lab Rd & Traff Engn Minist Educ Shanghai 201804 Peoples R China;

    Univ Tennessee Dept Civil & Environm Engn Knoxville TN 37996 USA;

    Univ Tennessee Dept Civil & Environm Engn Knoxville TN 37996 USA|Tongji Univ Coll Civil Engn Dept Geotech Engn Shanghai 200092 Peoples R China;

    Hohai Univ Coll Civil & Transportat Engn Nanjing 210098 Peoples R China;

    Univ Tennessee Dept Civil & Environm Engn Knoxville TN 37996 USA;

    Univ Tennessee Dept Civil & Environm Engn Knoxville TN 37996 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Pavement road bases; Life cycle assessment; Geopolymer; Waste;

    机译：路面道基基;生命周期评估;地缘聚合物;浪费;

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