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Performance evaluation of new warm mix asphalt and water stability of its mixture based on laboratory tests
Construction and Building Materials ( IF 7.4 ) Pub Date : 2020-01-08 , DOI: 10.1016/j.conbuildmat.2020.118017
Ke Zhang , Yaofei Luo , Fei Chen , Feifei Han

To confirm the reliability of self-developed ZYF-1 warm mix additive and provide some references for the promotion and application of ZYF-1, the conventional performance test and Strategic Highway Research Program (SHRP) test of SK90# asphalt and SBS modified asphalt containing ZYF-1 were conducted. The commonly used warm mix additives of Sasobit and Aspha-min were also tested. Meanwhile, the splitting test and Cantabro test of warm mix asphalt mixture before and after freeze-thaw cycles were conducted to evaluate the long-term water stability. The beam fatigue test and Wheel Tracking test were also carried out to verify other road performance of asphalt mixture with ZYF-1. The results show that ZYF-1 greatly improves the low temperature property of asphalt and has little adverse effect on high temperature performance. After mixed with Sasobit and Aspha-min additive, the high temperature property of asphalt is improved, but the low temperature performance is weakened. ZYF-1 and Sasobit significantly reduces the high temperature viscosity of asphalt binder, while Aspha-min makes the viscosity slightly increase. 4% by the weight of asphalt is recommended as the reasonable dosage for ZYF-1 based on the variation of asphalt performance. Freeze-thaw cycle simulation obviously influences the water stability of warm mix asphalt mixture, and 15 freeze-thaw cycles are recommended for the evaluation of water stability. Among tested additives, the deterioration range of water stability for asphalt mixture caused by ZYF-1 is the smallest. The warm mix asphalt mixture containing ZYF-1 effectively reduce the construction temperature while ensuring the road performance.



中文翻译:

基于实验室测试的新型暖拌沥青的性能评估及其混合物的水稳定性

为确定自行开发的ZYF-1温拌剂的可靠性,并为ZYF-1的推广应用,SK90#沥青和SBS改性沥青所含的常规性能试验和战略公路研究计划(SHRP)试验提供参考。进行了ZYF-1。还测试了Sasobit和Aspha-min常用的温拌添加剂。同时,进行了冻融循环前后热拌沥青混合料的劈裂试验和Cantabro试验,以评估其长期水稳定性。还进行了梁疲劳测试和车轮跟踪测试,以验证使用ZYF-1的沥青混合料的其他道路性能。结果表明,ZYF-1大大提高了沥青的低温性能,对高温性能的不利影响很小。与Sasobit和Aspha-min添加剂混合后,可改善沥青的高温性能,但会削弱其低温性能。ZYF-1和Sasobit大大降低了沥青粘合剂的高温粘度,而Aspha-min使粘度略有增加。根据沥青性能的变化,推荐4%(重量)的沥青作为ZYF-1的合理用量。冻融循环模拟显着影响温拌沥青混合料的水稳定性,建议使用15个冻融循环来评估水稳定性。在测试的添加剂中,由ZYF-1引起的沥青混合料水稳定性的劣化范围最小。含有ZYF-1的热拌沥青混合料可有效降低施工温度,同时确保道路性能。

更新日期:2020-01-09
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