温拌再生沥青混合料路用性能研究

发布时间：2018-02-16 21:24

本文关键词： 温拌再生沥青混合料水稳定性能低温抗裂性能高温稳定性能　出处：《西部交通科技》2017年03期 　论文类型：期刊论文

【摘要】：温拌再生沥青混合料是由热再生技术与冷再生技术发展而来的新型路面材料,文章通过冻融劈裂试验、低温弯曲试验和车辙试验对不同质量分数(0、10%、20%、30%、40%、50%)的RAP温拌再生沥青混合料的水稳定性能、低温抗裂性能及高温稳定性能进行研究。结果表明,随着RAP掺量的增加,温拌再生沥青混合料的冻融劈裂强度比先增大后减小,并在RAP质量分数为30%时达到最大;RAP质量分数为30%时,温拌再生沥青混合料的低温稳定性最好;随着RAP质量分数的增加,再生沥青混合料的高温稳定性能逐渐变好,当RAP质量分数这超过30%时,所添加的新沥青减少,其很难与废旧沥青更好地渗透互溶,使集料间的骨架结构密实程度变差,高温性能降低,因此初步建议路用温拌再生沥青中RAP材料的质量分数不宜超过30%.
[Abstract]:Warm mix recycled asphalt mixture is a new kind of pavement material developed from hot recycling technology and cold recycling technology. The low temperature bending test and rutting test were used to study the water stability, low temperature crack resistance and high temperature stability of the RAP warm mix recycled asphalt mixture with different mass fraction (0 / 10 / 20 / 20 / 50). The results showed that with the increase of the content of RAP, the water stability, the low temperature crack resistance and the high temperature stability of the mixture were studied. The freezing and thawing splitting strength of warm mix recycled asphalt mixture increased first and then decreased, and when the RAP mass fraction was 30 and the maximum rap mass fraction was 30, the low temperature stability of warm mix recycled asphalt mixture was the best, and with the increase of RAP mass fraction, the low temperature stability of warm mix recycled asphalt mixture was the best. The high temperature stability of recycled asphalt mixture becomes better gradually. When the mass fraction of RAP exceeds 30%, the added new asphalt decreases, and it is difficult to permeate each other better with waste asphalt, which makes the density degree of skeleton structure between aggregates worse. The high temperature performance is low, so it is suggested that the mass fraction of RAP in the recycled asphalt should not exceed 30%.
【作者单位】：永升建设集团有限公司;
【分类号】：U414

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