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微波辐射废胶粉改性沥青及混合料性能研究 总被引:5,自引:0,他引:5
采用微波辐射的方法对废胶粉表面进行改性活化,用高速剪切工艺在实验室制备了废胶粉改性沥青,基质沥青为泰州中海70号,废胶粉是由南通生产的80目(约0.3 mm),废胶粉掺量为15%。基于包括沥青常规三大指标试验、美国SHRP动态剪切流变试验、弯曲梁流变试验以及热存储稳定性试验等方法,对比分析了微波辐射废胶粉改性沥青和普通废胶粉改性沥青的性能;同时利用沥青混合料常规试验方法,研究了两种改性沥青混合料的路用性能。结果表明,微波辐射废胶粉改性沥青的高温性能、低温性能、抗老化性能和存储稳定性能均好于普通废胶粉改性沥青;微波辐射废胶粉改性沥青混合料的高温稳定性能、水稳定性能均好于普通废胶粉改性沥青混合料。 相似文献
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This article evaluates the stop-bar detection and count performance of three advanced vehicle detection sensors under various environmental conditions at a signalized intersection. Continuing advancements to vehicle detection technologies and improvements to their detection capabilities to overcome issues from impacting conditions necessitates testing the performance of new and upgraded sensor products to evaluate their performance and identify the most suitable products for various climates and weather conditions. The three evaluated sensors were Autoscope Encore video, Iteris Vantage Edge 2 video, and Wavetronix SmartSensor Matrix microwave sensors. The three sensors performed with high detection sensitivity during ideal environmental conditions with up to 99.9% detection accuracy levels and are suitable for traffic monitoring centers that rely on remote access to the monitored sites and the collected data. However, they were affected by some extreme adverse weather conditions, mainly daytime and nighttime snow, daytime fog, dawn lighting, and strong winds (for high mounted devices). The selection of a sensor product will depend on the type of application and the priority given to the type of traffic data being collected. Overall, the Iteris video sensor performed with the highest detection sensitivity levels, with the Wavetronix Matrix microwave sensor performing similarly under most conditions (14 of 19 evaluated conditions). Autoscope video provided the highest count accuracies and also provides a much broader data collection capability. The results of this study will help transportation agencies in selecting suitable vehicle detection sensor technologies for future installations within their jurisdiction and improved data collection. 相似文献
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舰载机上起辅助作用的数据对于改善舰载机的性能,提高打击精度起着重要作用。对目前成熟的无线通信技术:微波、激光、蓝牙、红外4种通信模式进行了阐述,从传输距离、速度、安全性、可靠性、抗干扰性、存在的缺陷等方面分别进行了分析比较,得出更适合辅助数据传递的是蓝牙通信。在此基础上进行了复杂情况下的蓝牙数据传输试验,得到传输距离、灵敏度、误码率等数据,印证了更适合舰载机辅助数据传递的模式是蓝牙通信。 相似文献
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