Why Durability Needs to be Assessed on Site and How - Roberto Juan Torrent.pdf

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1、Why Durability Needs to Be Assessed on Site and How?R.TorrentWhy Durability Needs to Be Assessed on Site and How?R.TorrentContentContentContentContent21.Labcrete,Realcrete and CovercreteWhy durability shall be measured in-Place?2.Penetrability In-Place Test MethodsNon-StandardStandard3.The Double-Ch

2、amber Vacuum Cell kTTest MethodPrinciples of the Test MethodClassification4.Why measure the air-permeabilitykTof concrete?Relation betweenkTand pore structureCorrelation with other Durability TestsEffect of curing onkT5.Field applications6.Why an ASTM Standard onkTtest method?ContentContentContentCo

3、ntent31.Labcrete,Realcrete and CovercreteWhy durability shall be measured in-Place?2.Penetrability In-Place Test MethodsNon-StandardStandard3.The Double-Chamber Vacuum Cell kTTest MethodPrinciples of the Test MethodClassification4.Why measure the air-permeabilitykTof concrete?Relation betweenkTand p

4、ore structureCorrelation with other Durability TestsEffect of curing onkT5.Field applications6.Why an ASTM Standard onkTtest method?Labcrete vs.Labcrete vs.Labcrete vs.Labcrete vs.RealcreteRealcreteRealcreteRealcrete4LabcreteThe quality of“Realcrete”is different and usually lower(-15%in terms of cor

5、es fc)Newman,1987 RealcreteCovercreteCovercreteCovercreteCovercrete,key for Durability,key for Durability,key for Durability,key for Durability5Newman,1987 RealcreteCovercreteoflower qualityDue to:Segregation Compaction Curing(lack of)Bleeding Finishing MicrocracksCO2Cl-SO42-IceCast specimens(Labcre

6、te),made and cured under standard conditions,DO NOT represent the quality of the vital covercrete,which needs to be assessed with in-place penetrability tests,preferably NDContentContentContentContent61.Labcrete,Realcrete and CovercreteWhy durability shall be measured in-Place?2.Penetrability In-Pla