| 摘要: |
| 对常用的4种沥青用高模量外掺剂，采用差示扫描量热法(DSC)测量其热流曲线及热流值，分析不同温度下4种外掺剂的聚集态及其随温度的变化情况，以确定高模量外掺剂的高温性能和感温性.对比4种外掺剂的DSC图谱形状变化及热流值后发现，外掺剂ADD 4没有明显的吸热峰，其聚合物没有固定的聚集态转变温度范围；外掺剂ADD 1聚集态的转变较外掺剂ADD 2，ADD 3复杂，在高温区有第2个吸热峰出现，使其自身高温性能更稳定. |
| 关键词: 基质沥青 高模量外掺剂 差示扫描量热法 热稳定性 |
| DOI：103969/j.issn.1007 9629201706015 |
| 分类号: |
| 基金项目: |
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| Thermal Stability Analysis of High Modulus Asphalt Admixture with DSC Test |
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XU Yongli1, XIA Yangyang1, FAN Wei2
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1.School of Civil Engineering, Northeast Forestry University, Harbin 150040, China;2.Department of Civil and Environmental Engineering, University of North Carolina at Charlotte, Charlotte, NC 28223, USA
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| Abstract: |
| In order to determine the high temperature performance and its sensitivity, the curves of heat flow and their values were measured for four different kinds of high modulus admixtures of asphalt by means of differential scanning calorimetry(DSC) at 4different temperatures with a view to analyzing the aggregated states and their variation. Comparing the shapes and values of heat flow from the DSC spectra for the four different admixtures, it is found that for the admixture ADD 4, no peak of absorption exists and its polymer does not exist the transition temperature range of aggregated states. The transition of the aggregated states of ADD 1 is more complicated than that of ADD 2 and ADD 3 There exists the second peak of heat absorption and its high temperature performance is more stable. |
| Key words: matrix asphalt high modulus admixture differential scanning calorimetry(DSC) thermal stability |
