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1、2015年第12期(總第314期)混凝土原材料及輔助物料Number12in2015(TotalNo.314)ConcreteMATERIALANDADMINICLEdoi:10.3969~.issn.1002—3550.2015.12.021再生粗骨料品質(zhì)和取代率對再生混凝土抗氯離子滲透性能影響韓帥。李秋義,岳公冰,莫建,王曉飛(青島理工大學(xué)藍(lán)色經(jīng)濟(jì)區(qū)工程建設(shè)與安全協(xié)同創(chuàng)新中心,山東青島266033)摘要:根據(jù)GB/T25177-2010(混凝土用再生粗骨料》,將廢棄混凝土簡單破碎后制得II類再生粗骨料,一次顆粒整形后制得準(zhǔn)I類再生粗
2、骨料,二次顆粒整形后制得I類再生粗骨料。采用再生粗骨料取代((b=0、50%、100%)天然骨料,研究粗骨料品質(zhì)和取代率對再生混凝土的抗氯離子滲透性能的影響。結(jié)果顯示:簡單破碎再生粗骨料混凝土的氯離子遷移系數(shù)隨著的增大而增大,其抗氯離子性能劣于普通昆凝土,與普通混凝土相比,非穩(wěn)態(tài)氯離子遷移系數(shù)增大了8.1%~35.1%;一次顆粒整形再生粗骨料混凝土的氯離子遷移系數(shù)隨著西的增大呈現(xiàn)減小的趨勢,其抗氯離子性能接近,甚至優(yōu)于普通混凝土;二次顆粒整形再生粗骨料混凝土的氯離子遷移系數(shù)隨著西的增大而減小,其抗氯離子性能優(yōu)于普通混凝土,與普通}昆凝土
3、相比,非穩(wěn)態(tài)氯離子遷移系數(shù)減小了9.7%~25.5%。關(guān)鍵詞:簡單破碎;顆粒整形;再生骨料;再生粗骨料混凝土;非穩(wěn)態(tài)氯離子遷移系數(shù)中圖分類號:TU528.041文獻(xiàn)標(biāo)志碼:A文章編號: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