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时间:2019-02-27
《再生粗骨料品质和取代率对再生混凝土抗氯离子渗透性能影响》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、2015年第12期(总第314期)混凝土原材料及辅助物料Number12in2015(TotalNo.314)ConcreteMATERIALANDADMINICLEdoi:10.3969~.issn.1002—3550.2015.12.021再生粗骨料品质和取代率对再生混凝土抗氯离子渗透性能影响韩帅。李秋义,岳公冰,莫建,王晓飞(青岛理工大学蓝色经济区工程建设与安全协同创新中心,山东青岛266033)摘要:根据GB/T25177-2010(混凝土用再生粗骨料》,将废弃混凝土简单破碎后制得II类再生粗骨料,一次颗粒整形后制得准I类再生粗
2、骨料,二次颗粒整形后制得I类再生粗骨料。采用再生粗骨料取代((b=0、50%、100%)天然骨料,研究粗骨料品质和取代率对再生混凝土的抗氯离子渗透性能的影响。结果显示:简单破碎再生粗骨料混凝土的氯离子迁移系数随着的增大而增大,其抗氯离子性能劣于普通昆凝土,与普通混凝土相比,非稳态氯离子迁移系数增大了8.1%~35.1%;一次颗粒整形再生粗骨料混凝土的氯离子迁移系数随着西的增大呈现减小的趋势,其抗氯离子性能接近,甚至优于普通混凝土;二次颗粒整形再生粗骨料混凝土的氯离子迁移系数随着西的增大而减小,其抗氯离子性能优于普通混凝土,与普通}昆凝土
3、相比,非稳态氯离子迁移系数减小了9.7%~25.5%。关键词:简单破碎;颗粒整形;再生骨料;再生粗骨料混凝土;非稳态氯离子迁移系数中图分类号:TU528.041文献标志码:A文章编号:1002—3550(2015)12—0080—04nfluenceofqualityandsubstitutionrateofrecycledcoarseaggregateoncoeficientofthechloridemigrationofrecycledconcreteHANShuai,LIOiuyi,YUEGongbing,MOJian,WANGX
4、iaofei(CollaborativeInnovationCenterofEngineeringConstructionandSafetyinShandongBlueEconomicZone,QingdaoTechnologicalUniversity,Qingdao266033,China)Abstract:AccordingtoGB/T25177-2010“Recycledcoarseaggregateinconcrete”,thewasteconcreteissimplycrushedtoIIclassrecycledcoars
5、eaggregate.firstlyreshapedtoIclass—to—berecycledcoarseaggregateinphysicalstrengtheningandtwicereshapedtoIclassrecycledcoarseaggregateinphysicalstrengthening.Theinfluenceoncoeficientofthechloridemigrationandsubstitutionrate(=0,50%,100%)ofrecycledcoarseaggregatetoreplacena
6、turalaggregatewerestudied.Theresultsshowthat,coeficientofthechloridemigrationofsimplycrashedrecycledcoarseaggregateconcreteincreaseswiththeincreaseofthesubstitutionrate,itsperform—anteofanti—chlorideionsisinferiortothatofordinaryconcrete:coeficientofthechloridemigrationo
7、fIclass—to—berecycledcoarseaggregateconcretereduceswiththeincreaseofthesubstitutionrate,itsperformanceofanti—chlorideionsisclosetothatofordi—naryconcrete;coeficientofthechloridemigrationofIclassrecycledcoarseaggregateconcretereduceswithincreaseofthesubstitutionrate,itspe
8、rformanceofanti—chlorideionsisbetterthanthatofordinaryconcrete.Keywords:simplecrushed;particleshaping;r
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