WIXLIB

National Concrete BridgeCouncil (NCBC)Research UpdatebyDanielle D. Kleinhans, Ph.D., P.E.Concrete Reinforcing Steel InstituteChair, National Concrete Bridge CouncilAASHTO SCOBS MeetingPortland, ORJune 16 - 20, 2013National ConcreteBridge Council American Coal Ash AssociationAmerican Segmental Bridge InstituteConcrete Reinforcing Steel InstituteExpanded Shale, Clay, and Slate InstituteNational Ready Mixed Concrete AssociationPortland Cement AssociationPrecast/Prestressed Concrete InstitutePost-Tensioning InstituteSilica Fume AssociationWire Reinforcement Institute1

6/25/2013FHWA OFFICE OF BRIDGE TECHNOLOGYPT Grout with Elevated Chlorides2013 AASHTO SCOBSPortland OregonJune 20, 2013Reggie Holt, P.E.Federal Highway Administration1FHWA OFFICE OF BRIDGE TECHNOLOGYBackground PT grout with elevated chlorides was initiallydiscovered in a PT straddle cap in TX (2010). PT grout used in TX bridge was a pre-baggedthixotropic product called SikaGrout 300PT. Follow up investigations by PT grout manufacturer,Sika, determined that its 300PT SikaGrout product fromits Marion OH plant was sometimes produced withlevels of chloride well above the specified limit. The cement used in the 300PT product has beenidentified as the source of the chlorides.21

CRSI Research UpdateCompleted ProjectsProjectUniversityUse of Ultrahigh-StrengthPurdue UniversityReinforcement in Columns ofFrames to Resist Seismic LoadsEvaluation of the Orientation ofMissouri University of90 and 180 Reinforcing BarScience & TechnologyHooks in Wide MembersThe Strength in Reinforced Concrete2

Coiled Bar PropertiesSchoolTexas Tech UniversityPrincipal InvestigatorDr. Sang-Wook BaeMatching FundsNominal - TX TechFoundationStatus - OngoingThe Strength in Reinforced ConcreteLap Splices in Thin MembersSchoolPurdue UniversityPrincipal InvestigatorDr. Santiago PujolMatching FundsPurdue FoundationEricoStatus – Report writingThe Strength in Reinforced Concrete3

Spiral StirrupsSchoolUniversity of CincinnatiPrincipal InvestigatorDr. Bahram ShahroozFundingPankow FoundationCRSI and PCIStatus – Report writingdoglegThe Strength in Reinforced ConcreteHigh-Strength Bar HooksSchoolUniversity of KansasPrincipal InvestigatorDrs. David Darwin &JoAnn BrowningFundingEPRI, CRSI, KDOT,PankowStatus - OngoingThe Strength in Reinforced Concrete4

High-Strength Bar HeadsSchoolUniversity of KansasPrincipal InvestigatorDrs. David Darwin &Adolfo MatamorosFundingEPRI, CRSIStatus - OngoingThe Strength in Reinforced ConcreteBar BendingSchoolNC State UniversityPrincipal InvestigatorDr. Rudolf SeracinoFundingCRSI & NC StateFoundationStatus - OngoingThe Strength in Reinforced Concrete5

Lap Splice LocationsSchoolUniv. of MassachusettsPrincipal InvestigatorDr. Sergio BreñaFundingCRSI, UMass SDI, &Robert BrackStatus - StartingThe Strength in Reinforced ConcreteSlender ColumnsSchoolPurdue UniversityPrincipal InvestigatorDr. Robert FroschMatching FundsPurdue, ACI, CRSI,PCI, CIF of NYCStatus – OngoingPPInitialEccentricity, eiEquilibriumEccentricity, efInitialEccentricity, eiPPThe Strength in Reinforced Concrete6

High-Strength Rebar Classed as yield (fy ) 80 ksi Collaborative researchconsortium?The Strength in Reinforced ConcreteHigh-Strength Rebar Economic analysis Develop generic materialrequirements (ASTM spec) Structural research Code adoptionThe Strength in Reinforced Concrete7

ESCSI Research UpdateInternal CuringPurdue University – Dr. Jason Weiss– Corrosion of reinforcement in restrained slabs– IC transport properties Tested RCPT, conductivity, chloride profile– Transport for service life models Quantifying sustainability aspects IC Diffusion characteristics: D & m coefficients– Several demonstration projects completed– Educational video series8

Internal CuringBrigham Young Univ. – Dr. Spencer Guthrie– IC bridge decks are being monitored andcompared with conventional concrete decks at2 sites– Initial results indicate reduced permeabilityand greatly reduced cracking on IC decksNatl Conc Pvmt Techn Ctr – Dr. Peter Taylor– IC deck is to be placed on a bridge inBuchanan County, IA, in mid-JuneLWA Fines for Air EntrainmentOklahoma State University - Dr. Tyler Ley– Preliminary testing with mortar showedpotential for LWA fines to protect the paste likeair entrainment– In concrete testing, both the conventionalmixes (no LWA) and mixes with LWA finesfailed the standard freeze-thaw testing– Waiting on final report9

Using Fine LWA toMitigate ASR in ConcreteOregon State University - Dr. Jason Ideker– Research is just getting underway– Slabs have been cast and placed at exposuresite– Dr. Michael Thomas at UNB is also onresearch teamLWC for PS PilesAuburn University - Dr. Brian Anderson– 12 in. square PS piles were cast and driven insummer of 2012 Control, Sand LWC & Partial LWC (LWA was usedfor 50% of coarse aggr) piles– No problems with driving any of the piles– Concluded that LWC could be used forprestressed piles– Work has been completed and a dissertationis available10

Field Implementation & Evaluationof Crack-Reduction TechnologiesKansas University - Dr. David Darwin– Major study to evaluate different crackreduction strategies in field installations– Identified as an Industry Critical Technology(ICT) by the Strategic Development Council(SDC) of ACI– Internal curing using LWA will be consideredas an option– ESCSI is one of several sponsors– Work to begin Sept 2012Market Evaluation & Road Map forUse of IC in Concrete PavementsApplied Research Assoc. - Dr. Mike Darter– Preliminary evaluation of potential for using ICwith LWA to improve the service life ofconcrete pavements– Initial findings indicate that there is potential toreduce cracking in pavements and extendservice life11

NRMCA/PCAResearch UpdateMIT Concrete Sustainability Hub 10 million Investment Over 5 Years (20102015) Funded Equally by RMCREF & PCA NRMCA Providing Technical Support andGuidance NRMCA and State Associations Have aCritical Role in the Technology TransferWWW. NRMCA.ORG12

MIT Concrete Sustainability Hub: Goals Identify Areas inWhich ConcreteExcels Identify Opportunitiesfor Improvement Create SolidTechnical Basis forFuture IndustryDevelopmentWWW. NRMCA.ORGMIT Concrete Sustainability (CS) Hub Life Cycle Analysis (LCA) Life Cycle Cost Analysis (LCCA) Incorporating VariabilityConstruction Materials: Equal Inflation Rates?Incorporating VariabilityGenesis of Concrete project Develop new generation of "green" cement-basedmaterialsWWW. NRMCA.ORG13

Life Cycle Analysis (LCA)LCA-investigation and valuation of the environmental impacts of a given product.WWW. NRMCA.ORGScope Of LCA Pavement ResearchScope includes alleffects attributable to thepavement design. Extraction andproduction Transportation Onsite equipmentMaterialsConstruction Pavement-VehicleInteraction Roughness Deflection Albedo Carbonation LightingUse PavementRemoval /Milling Landfilling Recycling TransportationEnd-of-LifeMaintenance Materials Construction Traffic delayWWW. NRMCA.ORG14

PCI Research UpdateStrandAcceptanceCriteria Kansas StateUniversity– 2011 to 2014 Standard Test forStrand Bond (STSB)– NCHRP Report 603– Pullout strength at0.1 in. slip15

Strand Bond Project Strand proposed to be qualified by pullouttest in mortar – now ASTM A1081 Project includes ruggedness testing,reproducibility round robin testing,sensitivity analysis, and beam flexuraltesting Goal – establish an acceptance value forpullout strengthRound Robin Labs FHWA Turner-FairbanksFlorida DOTKansas DOTTexas DOTMissouri DOTOhio DOTLouisiana DOT16

Strand Bond Missouri S&T– PCI Fellowship– SCC and HVFANEXT Beam University of Massachusetts Amherst– PCI Fellowship– Monitoring to refine distribution factors17

Beam Deformations Virginia Tech– PCI Fellowship– Variability of sweep in 128 bridge girdersranging from 120-140ft.ConcreteBridgesThank You18

National Concrete Bridge Council (NCBC) Research Update by Danielle D. Kleinhans, Ph.D., P.E. Concrete Reinforcing Steel Institute Chair, National Concrete Bridge Council AASHTO SCOBS Meeting Portland, OR June 16 - 20, 2013 National Concrete Bridge Council American C