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摘要
导电沥青混合料是解决路面冰雪问题的有效措施之一。采用铜渣(CS)等体积替代玄武岩细集料,并添加高碳含量的短切碳纤维(CF)制备导电沥青混合料。其中CS替代量从0%逐级增加20%,直至100%,共计6种替代比例,碳纤维掺量分别为集料质量的0.2%、0.3%和0.4%,合计18种配合比混合料。研究了CS和CF掺量、荷载大小、时间及循环加荷次数对沥青混合料电阻率的影响,并探究了电极埋设位置和通电功率对试件升温速率的影响。研究结果表明,随着CS和CF掺量的增加,混合料电阻率呈现下降特征;电阻率随荷载大小及循环加载次数均表现出先增大后减小的趋势,但无法恢复到原始状态;电阻率随时间变化的特征并不明显;电极埋置在试件中心位置时具有更好的传热效果,使混合料升温更为均匀;功率对升温速率具有显著作用。
Abstract
Making asphalt concrete with conductive properties is one of the effective measures to solve the problem of snow and ice accumulation on pavements.The conductive asphalt mixture was prepared by replacing basalt fine aggregate with copper slag (CS) in equal volume and adding short-cut carbon fiber (CF) with high carbon content.The copper slag replacement ratio progressively increased from 0% by 20% step up to 100%,with a total of six alternative ratios.The amount of carbon fiber was 0.2%,0.3% and 0.4% of the aggregate mass,respectively,for a total of 18 kinds of mixtures.The effects of CS and CF content,load size,time and the number of cyclic loading on the resistivity of asphalt mixture were investigated,and the impact of electrode embedding position and energizing power on the heating rate of specimens was also explored.It was concluded that the resistivity of the mixture decreased with the increase of the CS and CF amount.The resistivity of the mixture increased first and then decreased as the increase of the load and the number of cyclic loading,however,it was unable to restore to the original level.The variation feature of resistivity over time was not obvious.When the electrode was embedded in the center of the specimen,it had better heat transfer properties,leading to more uniform heating of the mixture.Power played a significant role on the heating rate.
关键词
铜渣
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碳纤维
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电阻率
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通电升温
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光纤测温
Key words
copper slag
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carbon fiber
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resistivity
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energizing power on temperature rise
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optical fiber temperature measurement
铜渣和碳纤维沥青混合料导电性能研究[J].
化工新型材料, 2023, 51(10): 272-276 DOI:10.19817/j.cnki.issn1006-3536.2023.10.014
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基金资助
国家自然科学基金资助项目(51178167)
