欢迎来到天天文库
浏览记录
ID:33638998
大小:381.71 KB
页数:5页
时间:2019-02-27
《再生细骨料强化对混凝土性能的影响》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7期(总第309期)混凝土原材料及辅助物料Number7in2015(TotalNo.309)ConcreteMATER1ALANDADMNICI尼doi:10.3969~.issn.1002—3550.2015.07.016再生细骨料强化对混凝土性能的影响郭远新,李秋义。岳公冰,王晓飞,孔哲(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:分别采用颗粒整形物理强化方法、有机硅防水剂化学强化方法和物理一化学复合强化方法对简单破碎再生细骨料进行强化处理后制备再生混凝土,重点研究强化处理前后再生细骨料对混凝土力学性能和耐久性能的影响。研
2、究表明,经过强化处理的再生细骨料混凝土的抗压强度、抗渗透性能和抗碳化性能均有显著的提高,其中在二次物理强化处理后再生混凝土的抗压强度达到最高值,接近于天然河砂混凝土的抗压强度,在二次物理强化和化学浸渍复合强化处理后再生混凝土的氯离子扩散系数减小到3.98×10m/s,在二次物理强化处理后其3、7、l4、28d的碳化深度分别较天然河砂混凝土仅增加0.6、0.3、0.2、0.3Inm。关键词:再生细骨料;强化;再生混凝土;抗压强度;抗渗透;抗碳化中图分类号:TU528.041文献标志码:A文章编号:1002—3550(2015)07—0063—05Influenceofrecy
3、cledfineaggregatereinforcedinpropertiesofconcreteGUOYuanxin,LIQJuyi,YUEGongbing,WANGXiaofei,KONGZhe(CollaborativeInnovationCenterofEngineeringConstructionandSafetyinShandongBlueEconomicZoneQingdaoTechnologicalUniversity,Qingdao266033,China)Abstract:Thisthesisadoptedthephysicalstrengthening
4、methodofparticleplasticandthechemicalstrengtheningmethodoforganosili—conwater——repellentandphysical—-chemicalcompoundstrengtheningmethodtostrengthenthesimplecrushingrecycledfineaggregatetopreparetherecycledconcrete,anditfocusedontheinfluenceoftherecycledfineaggregatebeforeandafterstrengthe
5、ningtreatmentonthemechanicalpropertiesanddurabilityofconcrete.Theresearchshowsthatthecompressivestrength.penetrationresistanceandcal"一bonafionresistanceofrecycledfineaggregateconcretethroughstrengtheningprocessingareimprovedsignificantly.Andthecompressivestrengthofrecycledconcreteafterthes
6、econdaryph3sicalstrengthentreatmentreachesthehighestvalue,closetothecompressivestrengthoftheconcreteinnaturalfiversand,andalso,thechlorideiondiffusioncoefficientofrecycledconcreteafterthesecondaryphysical—chemicalcompoundstrengtheningtreatmentdecreasesto3.98X10m/s,besides,comparedwiththeco
7、ncreteinnaturalriversand,thecarbonationdepthofrecycledconcreteafterthesecondaryphysicalstrengthentreatmentofthe3,7,14,28dwerein—creasedonlyin0.6,0.3,0.2,0.3mm.Keywords:recycledfineaggregate;reinforcement;recycledconcrete;compressivestrength;penetrationresistan
此文档下载收益归作者所有