EC-120温拌改性沥青胶结料性能试验研究

对EC-120有机降粘温拌改性沥青进行旋转粘度、常规性能指标、流变特性等试验研究,试验表明,EC-120作为一种熔点在100℃左右的有机添加剂,与沥青相容性好,制备容易,不存在离析问题。试验还表明在温拌改性沥青中,EC-120可降低沥青的高温粘度,提高中低温粘度,从而降低沥青混合料的拌和和压实温度;可降低沥青针入度,提高软化点和抗车辙因子,从而大幅改善沥青的高温稳定性;会使温拌改性沥青的延度降低,疲劳因子增大,蠕变劲度增大,变形速率减小,对沥青的抗疲劳和低温抗开裂性能略有消极影响。

Experimental Study on Performance of EC-120 Wet-mixing Modified Asphalt Cementing Materials

This paper carries out experimental study on rotational viscosity,normal performance indices and rheological properties,etc.of EC-120 organic viscosity reducing and wet-mixing modified asphalt,the experiment shows that EC-120 as an organic additive with the melting point at approximate 100 ℃ is well compatible with asphalt and easy to prepare without problem of isolation.The experiment also shows EC-120 in wet-mixing modified asphalt can reduce high-temperature viscosity and increase medium and low-temperature viscosity of asphalt so as to decrease mixing and compacting temperature of asphalt mixtures;can reduce needle penetration and increase softening point and anti-rutting factor so as to improve high-temperature stability of asphalt remarkably;and will enable reduction of ductility,increase of fatigue factor,increase of creepage stiffness and reduction of deformation rate of wet-mixing modified asphalt,which slightly have negative influence on anti-fatigue and low-temperature cracking properties of asphalt.