基于橡胶改性沥青技术低噪声微表处混合料耐久性试验研究

发布时间：2018-05-30 00:09

本文选题：道路工程 + 预防性养护　；参考：《公路》2017年04期

【摘要】：探讨了橡胶粉改性乳化沥青用于微表处混合料的可行性,基于室内试验和试验路铺筑研究了橡胶粉改性乳化沥青微表处混合料的施工性能、耐磨耗性能、抗车辙性能、水稳定性、低温抗裂性、降噪性及长期使用性能。试验结果表明,橡胶粉改性乳化沥青微表处混合料工作性能良好,能满足微表处混合料快速开放的要求。橡胶粉改性乳化沥青微表处混合料路用性能良好,其耐磨耗性能和低温抗裂性能优于SBS改性微表处混合料。随着橡胶粉掺量增大微表处混合料吸声系数呈二次函数关系增大,相比SBS改性乳化沥青微表处,在800~1 000 Hz振动频率范围内,橡胶粉改性乳化沥青微表处混合料的吸声系数可增大8%~15%,1 000~1 500 Hz振动频率范围内,橡胶粉改性乳化沥青微表处混合料的吸声系数可增大16%~24%,橡胶粉改性乳化沥青微表处混合料可大幅度降低传统微表处的噪音,具有优良的降噪功能。工程实践表明,橡胶粉改性乳化沥青微表处混合料与旧沥青混凝土路面黏附状况良好,施工性能好,采用橡胶粉改性乳化沥青微表处混合料延长了道路的使用寿命,经济、社会效益显著,具有推广应用价值。
[Abstract]:The feasibility of rubber powder modified emulsified asphalt used in micro-surfacing mixture is discussed. Based on laboratory test and test road construction, the construction performance, wear resistance and rutting resistance of rubber powder modified emulsified asphalt micro-surfacing mixture are studied. Water stability, low temperature crack resistance, noise reduction and long-term performance. The experimental results show that the mixture with rubber powder modified emulsified asphalt has good performance and can meet the requirement of rapid opening of the mixture. The pavement performance of rubber powder modified emulsified asphalt microsurfacing mixture is good, and its wear resistance and low temperature crack resistance are better than that of SBS modified asphalt microsurfacing mixture. With the increase of rubber powder content, the sound absorption coefficient of the mixture increases with the increase of the content of rubber powder. Compared with the SBS modified emulsified asphalt microsurfacing, the sound absorption coefficient of the mixture increases in the frequency range of 800,000Hz. The sound absorption coefficient of the mixture of rubber powder modified emulsified asphalt microsurfacing can be increased in the range of 1 000 ~ 1 500 Hz vibration frequency. The sound absorption coefficient of rubber powder modified emulsified asphalt microsurfacing can be increased by 16% and 24%. Rubber powder modified emulsified asphalt microsurfacing mixture can greatly reduce the noise of traditional microsurfacing and has excellent noise reduction function. The engineering practice shows that the mixture of rubber powder modified emulsified asphalt microsurfacing has good adhesion to old asphalt concrete pavement, and the rubber powder modified emulsified asphalt microsurfacing can prolong the service life of the road and is economical. The social benefit is remarkable and has the value of popularization and application.
【作者单位】：陕西交通职业技术学院;中铁七局集团西安铁路工程有限公司;
【分类号】：U414

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