橡胶粉掺量对沥青技术指标的影响

为了研究橡胶粉在沥青中的作用机理,通过室内试验分析了橡胶粉掺量对沥青软化点、针入度和低温延度的影响。试验结果表明:软化点和延度都随橡胶粉掺量的增大先增大后减小,当橡胶粉掺量为15%时,软化点和延度都达到最大值,表明此时橡胶沥青的高低温性能最好;针入度随橡胶粉掺量的增大逐渐降低,但与基质沥青的针入度相差不大。

To study the function mechanism of rubber powder in asphalt, analyzed the influence of rubber powder mixing amount on asphalt softening point, penetration and low temperature ductility through indoor test. Test results show that the softening point and ductility first increases, then decreases with the increase of rubber powder content and when the rubber powder content is 15% , softening point and ductility are maximum, indicates that the high and low temperature performance of rubber asphalt is best; penetration along with the increase of rubber powder content gradually decreased, but not much difference from the matrix asphalt penetration.