不同标号沥青的流变性能  

Rheological performance of different asphalt grades

作　　者：孙亮 冷斌 叶尔木拉提·木哈得尔 李宁博 郝培文[2] SUN Liang;LENG Bin;YEERMULATI Mu-hadeer;LI Ning-bo;HAO Pei-wen(Xinjiang Jingxin Expressway Co Ltd,China Railway Construction Corporation Limited,Wulumuqi 830000,China;Highway College of Changan University,Xi′an 710000,China)

机构地区：[1]中国铁建股份有限公司中铁建新疆京新高速公路有限公司,新疆乌鲁木齐830000 [2]长安大学公路学院,陕西西安710000

出　　处：《石化技术与应用》2023年第2期108-112,共5页Petrochemical Technology & Application

摘　　要：借助温度扫描、频率扫描、多重应力蠕变恢复等实验,对20号、30号、50号、70号沥青及其旋转薄膜烘箱老化后沥青的流变性能进行了评价。结果表明:随着温度升高,4种沥青老化前后复数剪切模量和车辙因子均降低,并且老化后的高于老化前;在60℃温度下,无论是在低频还是高频荷载作用下,标号越低,沥青耐剪切变形能力越强,耐车辙性越好,而应力敏感性降低;标号越低的沥青,G-R参数值越大,耐开裂性则降低。The rheological performance of 20#,30#,50#and 70#original asphalt and asphalt aged in rotary film oven was evaluated by using temperature scanning test,frequency scanning test,multi stress creep recovery(MSCR)test.The results showed that as the temperature rose,the complex shear modulus(G*)and rutting factor(G*/sinδ)of virgin and aged asphalt all decreased.The G*and G*/sinδof aged asphalt were larger than those of the virgin asphalt.At the temperature of 60℃,when the asphalt grade decreased under all frequency loads,the shear deformation resistance of the asphalt was stronger;the rutting resistance was better;the stress sensitivity was lower.In low-grade asphalt,when the G-R value was greater,the crack resistance was worse.

关 键 词：沥青 耐老化性能 耐车辙性 复数剪切模量 车辙因子 流变性能 

分 类 号：TQ626.86[化学工程—精细化工]