以煤制油沥青(coal to oil asphalt,CTOA)为原料,加入乙烯焦油沥青(ethylene tar pitch,ETP)进行改性,采用热聚合法制备出高品质的包覆沥青。在最佳热聚合工艺条件下制备出200^(#)包覆沥青;利用元素分析仪、红外光谱仪、拉曼光谱仪、X...以煤制油沥青(coal to oil asphalt,CTOA)为原料,加入乙烯焦油沥青(ethylene tar pitch,ETP)进行改性,采用热聚合法制备出高品质的包覆沥青。在最佳热聚合工艺条件下制备出200^(#)包覆沥青;利用元素分析仪、红外光谱仪、拉曼光谱仪、X射线衍射仪、扫描电子显微镜、热重分析仪等对包覆沥青的微观形貌、结构和组成进行分析。结果表明,相较于空气氧化法和催化交联聚合法,改性和热聚合所制备的200^(#)包覆沥青的QI和灰分质量分数显著降低,产品性能优异;微观结构和组成分析表明,包覆沥青分子具有较高的碳质量分数和芳香缩合度,分子中类石墨结构增多,碳微晶排列规整,热重分析结果进一步证实其热稳定性显著增强,可用作锂电负极包覆材料。展开更多
The mix design method of asphalt rubber open-graded friction course (AR-OGFC) by the Marshall test and key technologies of AR-OGFC overlay are studied. Based on the draindown test, the stripping test and the Marshal...The mix design method of asphalt rubber open-graded friction course (AR-OGFC) by the Marshall test and key technologies of AR-OGFC overlay are studied. Based on the draindown test, the stripping test and the Marshall test by different beating times, the asphalt content estimating method and Marshall beat criterion are studied. It is found that the asphalt content of AR-OGFC can be estimated by the formula of Arizona, and the proper Marshall test criterion for AR-OGFC is 50 beats on both sides. By analyzing the influence of gradation on OGFC performance, the gradation of AR-OGFC is recommended, and the amount of aggregate passing 4. 75 mm should be minimized for AR-OGFC. Through investigation of AR-OGFC overlay projects, key technologies such as the treatment of underlying pavement and the selection of tack coat are advanced, and modified emulsified asphalt should be used in AR-OGFC overlay tack coat.展开更多
文摘以煤制油沥青(coal to oil asphalt,CTOA)为原料,加入乙烯焦油沥青(ethylene tar pitch,ETP)进行改性,采用热聚合法制备出高品质的包覆沥青。在最佳热聚合工艺条件下制备出200^(#)包覆沥青;利用元素分析仪、红外光谱仪、拉曼光谱仪、X射线衍射仪、扫描电子显微镜、热重分析仪等对包覆沥青的微观形貌、结构和组成进行分析。结果表明,相较于空气氧化法和催化交联聚合法,改性和热聚合所制备的200^(#)包覆沥青的QI和灰分质量分数显著降低,产品性能优异;微观结构和组成分析表明,包覆沥青分子具有较高的碳质量分数和芳香缩合度,分子中类石墨结构增多,碳微晶排列规整,热重分析结果进一步证实其热稳定性显著增强,可用作锂电负极包覆材料。
文摘The mix design method of asphalt rubber open-graded friction course (AR-OGFC) by the Marshall test and key technologies of AR-OGFC overlay are studied. Based on the draindown test, the stripping test and the Marshall test by different beating times, the asphalt content estimating method and Marshall beat criterion are studied. It is found that the asphalt content of AR-OGFC can be estimated by the formula of Arizona, and the proper Marshall test criterion for AR-OGFC is 50 beats on both sides. By analyzing the influence of gradation on OGFC performance, the gradation of AR-OGFC is recommended, and the amount of aggregate passing 4. 75 mm should be minimized for AR-OGFC. Through investigation of AR-OGFC overlay projects, key technologies such as the treatment of underlying pavement and the selection of tack coat are advanced, and modified emulsified asphalt should be used in AR-OGFC overlay tack coat.