ML12157A315
| ML12157A315 | |
| Person / Time | |
|---|---|
| Issue date: | 06/05/2012 |
| From: | Office of the Chief Human Capital Officer |
| To: | |
| References | |
| Download: ML12157A315 (55) | |
Text
s s Code s Code s g y and g y and h nolo g h nolo gThe Petrographic Report te Tec h te Tec h C oncre t C oncre t C C PetrographicExamination Petrographic ExaminationWhatisit? What is it? How is it done?Whatcanitdo? What can it do? What can't it do?Whatwillthepetrographicreportsay? What will the petrographic report say?How do I critically read a petrographic report?report?
StructuralEvaluation Structural Evaluation L A R G E L A R G E s c a l e t o s m a ll s c a l e
StructuralEvaluation Structural EvaluationACI364.1R"GuideforEvaluationof ACI 364.1R Guide for Evaluation of Concrete Structures Prior to Rehabilitation"ACI 349.3 "Evaluation of Existin g Nuclear g Safety-Related Concrete Structures" di NDE*document rev i ew*field inspection
- conditionsurvey
- NDE*sampling*materialtesting(laboratory)
- condition survey*material testing (laboratory)
StructuralEvaluation Structural EvaluationACI 364.1 Table 6.1(a)
Evaluation of Properties of Concrete StructuralEvaluation Structural EvaluationACI 364.1 Table 6.1(b)
Evaluation of Physical Conditions of Concrete StructuralEvaluation Structural Evaluation Importance of Appropriate Samples Petrography PetrographyDefinedasthesystematicdescriptionand Defined as the systematic description and classification of rocks (or concrete),
especially through microscopical examinationMethods and techniques for concrete petrography derived from geology, metallurgy, and ceramics PetrographicExamination Petrographic ExaminationASTMC856-04-StandardPracticefor ASTM C 856 04 Standard Practice for Petrographic Examination of Hardened
Concrete"Guideline" for microscopical analysis of concrete and related materialsMhddhiihM et h o d s an d tec h n iques may vary w i t h scope of investigation PetrographicExamination Petrographic ExaminationExaminesampleas
-received Examine sample as received PetrographicExamination Petrographic ExaminationSelectareasforsub
-sampling Select areas for sub sampling PetrographicExamination Petrographic ExaminationLappedsurface Lapped surface PetrographicExamination Petrographic Examination Stereomicroscope Stereomicroscope
PetrographicExamination Petrographic ExaminationFreshfracture Fresh fracture
PetrographicExamination Petrographic ExaminationThinsection Thin section PetrographicExamination Petrographic ExaminationPolarizedlight(petrographic)microscope Polarized light (petrographic) microscope
PetrographicExamination Petrographic ExaminationPowdermount Powder mount Petrographic Examination CAN-Describethegeneralcomposition,quality, Describe the general composition, quality, and condition of the concrete and its
constituents
Petrographic Examination CAN-Estimateaircontentandadequacyofair
- Estimate air content and adequacy of air void system
Petrographic Examination CAN-Identifysupplementarycementing Identify supplementary cementing materials
Petrographic Examination CAN-Determinegeneralcompliancewithmix Determine general compliance with mix design (aggregates, air content, SCMs, w/c)
Petrographic Examination CAN-Determinedepthofpastecarbonation Determine depth of paste carbonation
Petrographic Examination CAN-Evaluateworkmanship(consolidation, Evaluate workmanship (consolidation, finishing, curing)
Petrographic Examination CAN-Evaluatepossiblecausesofdistress Evaluate possible causes of distress
Petrographic Examination CAN-Recommendadditionalteststo Recommend additional tests toinvestigate the problemAirvoidsystemanalysis(ASTMC457)Air void system analysis (ASTM C457)Scanning electron microscopy (SEM-EDX)Cement content analysis (ASTM C1084)Compressive strength testing (ASTM C42)X-ray diffractionX-ray fluorescenceXrayfluorescenceChemical tests Petrographic Examination
'CAN'T-Determinecementcontent Determine cement contentDetermine cement typeConfirmpresencetypeorquantityof Confirm presence , type , or quantity of chemical admixturesDeterminetimingofwateradditions Determine timing of water additionsDetermine precise proportions of mixDetermineconcretestrength Determine concrete strength PetrographicReport Petrographic ReportBackgroundinformation/reasonfortesting Background information/
reason for testing ConclusionsSummaryofobservations Summary of observations DiscussionMethodologyofexamination Methodology of examination Photographs Dt D a t a pages EvaluatingaReport Evaluating a ReportWeresamplesrepresentative? Were samples representative? Do observations/data agree and seem p lausible?pDo photographs illustrate observations?Doconclusionsdrawnfromobservations Do conclusions drawn from observations seem logical? Is original question addressed?Isoriginalquestionaddressed?NEVERBEAFRAIDTOQUESTIONTHE NEVER BE AFRAID TO QUESTION THE PETROGRAPHER!