生产工艺参数对胶粉改性沥青混合料强度影响的试验研究

选择胶粉改性沥青生产中涉及的搅拌方式、搅拌温度、搅拌时间以及胶粉掺量4个参数，控制3个参数不变，改变另一个参数，采用间接拉伸（IDT）试验研究生产工艺参数对胶粉改性沥青混合料强度的影响，并通过灰色关联方法分析各参数对混合料强度的影响程度。结果表明：高速搅拌方式生产的胶粉改性沥青混合料强度最大，简单搅拌最差；180～200℃生产温度能得到强度较好的混合料；搅拌时间并非越长越好，而是有一个合理的范围，建议选择l～1．5h；从沥青的改性程度和施工和易性考虑，建议胶粉掺量为17．6％～22％；4个工艺参数中，胶粉掺量和搅拌时间是最关键的影响因素，搅拌温度次之，搅拌方式影响不大。

Experimental Research on Influences of Production Process Parameters on Strength of Rubber Powder Modified Asphalt Mixture

This paper selects 4 parameters, i.e. mixing mode, mixing temperature, mixing time and mixing amount rubber powder concerned in production of rubber powder modified asphalt, controls 3 parameters constant and changes the other parameter to research influences of production process parameters on strength of rubber powder modified asphalt mixture by means of indirect tension （IDT） test, and analyzes degree of influences on strength of mixture through grey correlation method. The results show that the strength of rubber powder modified asphalt mixture produced in high-speed mixing mode is the best and high-speed shear is the worst; 180 ~ 200 ~C production temperature can obtain mixture with better strength; mixing time is not good as long as possible hut has a reasonable range, and 1 ~ 1.5 h is recommended; in consideration of modified degree of asphalt and workability of construction, 17.6% ~ 22% mixing amount of rubber power is recommended ; in 4 process parameters, mixing amount of rubber powder and mixing time are most critical influence factors, mixing temperature is secondary, and mixing mode shows small influences.