公路交通技术
公路交通技術
공로교통기술
TECHNOLOGY OF HIGHWAY AND TRANSPORT
2014年
2期
34-37
,共4页
橡胶粉%改性沥青%敏感性%性能
橡膠粉%改性瀝青%敏感性%性能
상효분%개성력청%민감성%성능
rubber powder%modified asphalt%sensibility%performance
选用20、40、80目3种橡胶粉，按15%、18%、21%、24%四种比例掺入70#基质沥青配制橡胶改性沥青，对改性沥青进行针入度、延度、软化点试验。结果表明：基质沥青经过不同粒径的橡胶粉改性后，沥青软化点和当量软化点升高，针入度降低，针入度指数增大，沥青温度敏感性降低，综合性能得到提高。
選用20、40、80目3種橡膠粉，按15%、18%、21%、24%四種比例摻入70#基質瀝青配製橡膠改性瀝青，對改性瀝青進行針入度、延度、軟化點試驗。結果錶明：基質瀝青經過不同粒徑的橡膠粉改性後，瀝青軟化點和噹量軟化點升高，針入度降低，針入度指數增大，瀝青溫度敏感性降低，綜閤性能得到提高。
선용20、40、80목3충상효분，안15%、18%、21%、24%사충비례참입70#기질력청배제상효개성력청，대개성력청진행침입도、연도、연화점시험。결과표명：기질력청경과불동립경적상효분개성후，력청연화점화당량연화점승고，침입도강저，침입도지수증대，력청온도민감성강저，종합성능득도제고。
This paper selects 20 , 40 and 80-mesh rubber powders and mixes into No.70 matrix asphalt in 15%, 18%, 21% and 24% proportions to prepare rubber modified asphalt, and tests needle penetration, ductility and softening point of the modified asphalt. The result shows that after the matrix asphalt is modified by rubber powders in different particle sizes, the softening point of asphalt and equivalent softening point rise, the needle penetration reduces, the index of needle penetration increases, the temperature sensibility of asphalt decreases, and comprehensive performance is improved.
