1 长安大学特殊地区公路工程教育部重点实验室,西安 710064
2 济宁市鸿翔公路勘察设计研究院有限公司,济宁 272100
3 呼和浩特市交通运输局,呼和浩特 010010
针对溶剂型冷补沥青性能不足及其技术指标评价方法不完善的问题,本文优选冷补沥青的材料组成,通过试验确定了冷补沥青的最佳制备工艺。采用正交试验设计方法研制一种性能优良的溶剂型冷补沥青,并对冷补沥青的性能评价方法进行了优化,通过对比试验对其路用性能进行了验证。研究结果表明,研发的溶剂型冷补沥青最佳配合比为m(基质沥青)∶m(稀释剂)∶m(增黏剂)∶m(表面活性剂)∶m(补强剂)∶m(抗剥落剂)=100∶(20~25)∶4∶1∶5∶0.2。确定了溶剂型冷补沥青的最佳制备工艺,在110 ℃热熔融沥青中加入定量稀释剂,用高速剪切机搅拌10 min,其次加入定量增黏剂、补强剂和表面活性剂的混合物,持续搅拌10 min,最后加入定量抗剥落剂搅拌10 min。综合考虑各因素,经优化后的性能评价方法能较好地反映冷补沥青的路用性能。基于正交试验设计方法和最佳制备工艺制备的溶剂型冷补沥青性能优于选择的成品冷补沥青,并且能够拌制出性能优良的混合料。
冷补沥青 外加剂 正交试验 制备工艺 性能评价 技术指标 cold patching asphalt admixture orthogonal test preparation process performance evaluation technical index
Author Affiliations
Abstract
Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
The authors review the recent advances in fabricating long-period gratings (LPGs) in photonic crystal fibers (PCFs). The novel light-guiding properties of the PCFs allow the demonstration of novel sensors and devices based on such LPGs. The sensitivity of these PCF LPGs to temperature, strain and refractive index is discussed and compared with LPGs made on conventional single-mode fibers. In-fiber devices such as tunable band rejection filters, Mach-Zehnder interferometers are discussed.
Photonic crystal fiber long-period grating optical fiber sensor Photonic Sensors
2012, 2(1): 65