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1、靖安高速公路(延安段)SMA路面施工作业指导书概况安塞至靖边高速公路(延安段)K49+777.858—K67+845段上面层工程,采用4cm厚SBS改性沥青玛蹄脂碎石路面13型(以下简称SMA-13),全长为18.067公里,另包括镰刀湾互通区部分,施工面积为平方米。SMA具有较好的高温稳定性和低温抗裂性,能保持较好抗滑能力和平整度、减少噪音、提高路面舒适度等优点。为正确指导上面层SMA-13的施工作业,规范其操作规程,特制定本指导书。1.总则1.1铺筑SMA-13面层时,除本指导书外,应遵照交通行业标准《公路沥青路
2、面施工技术规范》(JTJ032)及《公路改性沥青路面施工技术规范》(JTJ036)的规定执行。1.2SMA是一种由沥青、纤维稳定剂、矿粉及少量的细集料组成的沥青玛蹄脂填充间断级配的粗集料骨架组成一体的沥青混合料,是一种嵌挤密实结构。2.SMA的特点ayearcleangovernmentworkConferenceoftheCPCCommittee,eachquarterahonestanalysisofthesituation,troubleshoottheindependentCommissionagainstc
3、orruptionrisks,developqualitymeasures.Third,leadersspeaklow. TeamleadtoldtheindependentCommissionagainstcorruptionofthePartyCommitteeofthePartyCommitteepartylectures,leadreportingpersonalmattersrelatedtoleadtohonestcommitmenttotheofficersandmenofthewholecity,s
4、trictlyabidebythepartydisciplineandstatelawsanddisciplinaryrulesoftheICACagainstourselves,behaveyourself,toamendandimprovethemselves,strictlyimplementshardingbundledpackages,contactpointsresponsibilityatwork,constructionandoperationalworkwiththedeployment,withg
5、uidance,andinspection.(B)persistentgraspingideologicaleducationleads.Anormalized,paycloseattentiontoeducation.Thisyear,thedetachmenthaslauncheda"clean"seriesofeducation,specialeducationandconsolidationofnetworkandinformationsecurity,throughlargelecturehall,issu
6、edtotheofficersandmenoftheICACindependentCommissionagainstcorruptionbooks,visiteducationbase,setwarningeducationactivitiestofurtherenhanceself-disciplineconsciousnessofofficersandsoldiers.Second,withtypicallead.OrganizationstocarryoutadiligentandhonestGovernmen
7、tadvancedunitsandadvancedindividualsselectedbybroadtothethirdnational"tenoutstandingfire-guards"LiuDajing,""XX'stoptenoutstandingyoungpersons"in2.1在SMA的组成中,矿料是间断级配,粗集料占到70%以上,粗集料颗粒之间有良好的嵌挤作用,沥青混合料产生非常好的抵抗荷载变形的能力,因而有较强的高温抗车辙能力。2.2SMA使用矿粉多(8-12%),沥青多(5.5-6.5%),又使
8、用纤维作稳定剂,由此组成的沥青玛蹄脂包裹在粗集料表面,充全填充集料间隙,对骨架有较好的粘结作用,因此具有较好的低温抗裂性能。2.3SMA混合料的内部空隙率很小(4%左右),渗水很少,再加上玛蹄脂与集料的粘结力好,混合料的水稳定性也较大改善。2.4SMA一方面要求采用坚硬的耐磨的优质石料;另一方面矿料采用间断级配,粗集料含量高,路面压实后表面形成