偶联改性玄武岩纤维沥青胶浆流变性能研究

Research on Rheological Properties of the Basalt Fiber with Coupling Treatment Modified Asphalt Mortar

针对偶联改性玄武岩纤维沥青胶浆现有研究现状和不足,采用1.0%的硅烷偶联剂KH-550溶液对玄武岩纤维表面偶联处治,制备了纤维掺量为0.3%、0.6%及0.9%偶联改性玄武岩纤维沥青胶浆,通过动态剪切流变试验测得复数模量、相位角、车辙因子评价高温流变性能,通过弯曲梁流变试验测得劲度模量、劲度变化率评价低温流变性能。试验结果表明,偶联改性玄武岩纤维提高了沥青胶浆抵抗高温剪切变形的能力,但对低温性能改善有限。

Concerning to the shortcomings of the basalt fiber modified asphalt mortar, the basalt fiber is treated with silane co 0.9 % basalt fiber with upling agent KH-550 whose concentration is 1.0% to prepare 0.3%, 0.6% and coupling treatment modified asphalt mortar. The complex modulus, phase angle and rut factor of dynamic shear rheologieal test are used to evaluate the high temperature rheological properties of modified asphalt mortar. The stiffness modulus and stiffness change rate are used to evaluate the tow temperature rheological properties of modified asphalt mortar. The results show that basalt fiber with coupling treatment can improve the asphalt mortar＇s abilities of anti high temperature shearing but the low temperature performance improvement is limited.