首页|不同粉胶比下矿粉沥青胶浆路用性能研究

不同粉胶比下矿粉沥青胶浆路用性能研究

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沥青胶浆是沥青混合料的重要组成部分,对沥青混合料的路用性能有着直接影响.为分析不同粉胶比对沥青胶浆性能的影响,采用动态剪切流变试验(DSR),以车辙因子为指标,分析沥青胶浆的高温流变特性;采用全温度与全频率扫描试验,以复数模量主曲线为指标,分析沥青胶浆的动力黏弹特性.试验结果表明,沥青胶浆的高温性能随着粉胶比的增加而增强.采用弯曲梁流变仪(BBR),以弯曲劲度模量和蠕变速率为指标,分析沥青胶浆的低温性能,试验结果表明沥青胶浆低温性能随着粉胶比的增加而降低.通过旋转黏度计测定胶浆的黏度,依据施工时黏度要求,计算施工温度,分析了矿粉填量对施工温度的影响.综上所述,随着粉胶比的增加,高温性能增强,但低温性能降低,再考虑施工要求,控制在1.0~1.2之间为宜.
STUDY ON THE ROAD PERFORMANCE OF MINERAL POWDER ASPHALT MORTAR WITH DIFFERENT FILLER-BITUMEN RATIOS
The performance of asphalt mortar directly affects the pavement performance of asphalt mixture as as-phalt mortar that is as an important component of asphalt mixture.In order to analyze the effectiveness of different filler-bitumen ratios on performance of asphalt mortar,dynamic shear rheological test(DSR)is conducted to study high-temperature rheological properties of asphalt mortar by using rutting factor.Full temperature and full frequen-cy scanning tests are conducted to study dynamic viscoelastic properties of asphalt mortar by using complex modulus main curve,indicating that high-temperature performance of asphalt mortar increases with the increase of filler-bitu-men ratio.Bending beam rheometer(BBR)is employed to study low-temperature performance of asphalt mortar by using bending stiffness modulus and creep rate,indicating that low-temperature performance of asphalt mortar de-creases with the increase of filler-bitumen ratio.In order to analyze influence of the amount of mineral powder on construction temperature,viscosity of asphalt mortar is measured by rotary viscometer and the construction tempera-ture is calculated according to the viscosity requirements during construction.As the filler-bitumen ratio increases,the high-temperature performance is enhanced,whereas the low-temperature performance decreases.It is advisable to control filler-bitumen ratio between 1.0 and 1.2 considering the construction requirements.

mineral powder asphalt mortardynamic viscoelasticitybending stiffness modulus

吴倩、陈松强

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浙江省交通投资集团有限公司,杭州 310020

浙大城市学院,杭州 310015

矿粉沥青胶浆 动力黏弹性 弯曲劲度模量

2024

低温建筑技术
黑龙江省寒地建筑科学研究院

低温建筑技术

影响因子:0.237
ISSN:1001-6864
年,卷(期):2024.46(5)