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1、第7卷第2期交通运输工程学报Vol17No122007年4月JournalofTrafficandTransportationEngineeringApr.2007文章编号:167121637(2007)0220036205改性沥青混合料拌和与压实温度确定方法121张争奇,李宁利,陈华鑫(11长安大学特殊地区公路工程教育部重点实验室,陕西西安710064;21西北工业大学材料学院,陕西西安710072)摘要:为了研究改性沥青混合料拌和与压实温度确定方法,对几组改性沥青混合料的旋转压实试验及体积参数进行了分析,根据压实效果确定出最佳压实温度,依据改性沥青混合料取得
2、最佳压实-1效果时粘度与温度和剪切速率的关系,推荐了一个改性沥青混合料测粘剪切速率为60s。在该剪切速率下,测试不同温度下改性沥青的粘度,得到粘温曲线,再按(0117±0102)Pa·s和(0128±0103)Pa·s粘度规定确定出改性沥青混合料拌和与压实温度。推荐方法确定的改性沥青混合料压实温度与最佳压实效果时的压实温度相差5℃,温度符合实际工程生产时的施工温度,说明推荐的方法是合理的。关键词:路面工程;旋转压实;改性沥青;剪切速率;拌和与压实温度中图分类号:U414文献标识码:ADeterminingmethodofmixingandcompactionte
3、mperaturesformodifiedasphaltmixture121ZhangZheng2qi,LiNing2li,ChenHua2xin(11KeyLaboratoryforSpecialAreaHighwayEngineeringofMinistryofEducation,ChangpanUniversity,Xipan710064,Shaanxi,China;21SchoolofMatericalsScienceandEngineering,NorthwesternPolytechnicalUniversity,Xipan710072,Shaanx
4、i,China)Abstract:Inordertoreasonablydeterminethemixingandcompactiontemperaturesofmodifiedasphaltmixture,gyratorycompactiontestwasconductedonseveralmodifiedasphaltmixtures,theirvolumeparameterswereanalyzed,anoptimalcompactiontemperaturewasobtainedbasedonthecompactioneffect,andaccordin
5、gtotherelationshipamongtheviscositywiththetemperatureandshear-1rateformixtureattheoptimalcompactioneffect,ashearrateof60swasproposedtomeasuretheviscosityofmodifiedasphalt.Aimedattheshearrate,theviscositiesatdifferenttemperaturesandtheviscosity2temperaturecurvescouldbegot,andthemixing
6、andcompactiontemperaturesweredeterminedwiththeviscosityrequestof(0117±0102)Pa·sand(0128±0103)Pa·srespectively.Thedifferencebetweenthecompactiontemperatureobtainedbythecommendedmethodandthetemperatureattheoptimalcompactioneffectis5℃,thetemperatureobtainedbythecommendedmethodisinaccord
7、ancewithpavingpractice,whichindicatesthatthecommendedmethodisreasonable.5tabs,6figs,10refs.Keywords:pavementengineering;gyratorycompaction;modifiedasphalt;shearrate;mixingandcompactiontemperaturesAuthorresume:ZhangZheng2qi(19672),male,professor,+86229282335306,z_zhengqi@126.com.收稿日期:
8、2006212202基金
