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摘要
通过原位界面水解-聚合法制备出相变调温材料(PCMs),对其进行差示量热(DSC)和热重(TG)热性能测试,再将其掺入到70#基质沥青中,研究不同掺量的相变调温材料对沥青常规指标、高温流变性能的影响;最后分析比较了AC-16与SAC16两种不同级配的相变沥青混合料的高温稳定性与调温性能。结果表明:制备的相变调温材料具有适宜的相变温度与较高的相变焓,且热稳定性良好,可用于沥青工程中;相变调温材料的掺入可改善基质沥青的高温性能,但对低温性能有着不利影响,且随相变材料掺量的增大,相变沥青的高温抗车辙性能显著提升;级配类型对相变沥青混合料的高温稳定性有着重要影响,因此在实际应用中,在考虑相变调温材料对沥青混合料起到调温作用的同时,还要考虑级配类型对其物理性能的影响。
Abstract
A novel composite phase change materials (PCMs) was prepared by in situ interfacial hydrolysis polymerization method,DSC and TG were utilized to test the thermal performance of PCMs.Then,PCMs were added into 70# asphalt,for purpose of investigating the impact of dosage on the regular indices,high temperature rheology performance of asphalt.Finally,the high temperature stability and temperature regulation performance of AC-16 and SAC16 two different gradation asphalt mixtures were analyzed and compared.The results showed that the prepared PCMs possessed suitable phase change temperature and enthalpy which can be used in the asphalt engineering.The addition of PCMs could improve the high temperature performance of matrix asphalt,but had a negative impact on the low temperature performance.Meanwhile,with the increase of the amount of PCMs,the rutting resistance of phase change asphalt was significantly improved,gradation type had an important influence on the high temperature stability of asphalt mixture with PCMs.Therefore,in practical application,the influence of gradation type on its physical properties should be considered while considering the temperature-control effect of PCMs for asphalt mixture.
关键词
道路工程
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相变材料
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调温性能
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高温性能
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沥青混合料
Key words
road engineering
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phase change material
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temperature-control performance
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high-temperature performance
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asphalt mixture
相变调温材料对沥青及沥青混合料高温性能及控温性能的影响探究[J].
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基金资助
国家自然科学基金(51508496)
