水稻秸秆纤维沥青胶浆流变性能影响因素研究.

In order to explore the effect of rice straw on the high and low temperature rheological properties of asphalt mortar, orthogonal experiments were used to investigate the effects of different fiber content, length and powder rubber. The dynamic shear rheological test and bending beam rheological test were carried out to evaluate the effect of rice straw on the high and low temperature performance of asphalt mortar. The influence of different factors on its performance changes was analyzed. The results show that each factor has different degrees of influence on the rheological properties of rice straw fiber asphalt mortar. Influence. The powder-to-rubber ratio plays a decisive role in its performance. The increase of the powder-to-rubber ratio significantly enhances the high temperature deformation resistance of the fiber asphalt mortar, but at the same time the stiffness The modulus rises sharply, and the crack resistance at low temperature drops sharply, so the powder-to-rubber ratio is recommended to be 1.0~1.2. The increase of fiber content and length makes the high temperature performance of the glue At present, there is a trend of strengthening first and then weakening. The fiber-asphalt mortar with a content of 4% and a length of 9 mm at -12 and -18 ℃ has the best low-temperature crack resistance. Combined with the analysis of high and low temperature properties of the mortar, it is recommended that the fiber length of 9mm and the content of 4% are the best preparation process. [ABSTRACT FROM AUTHOR]