ML12157A315
| ML12157A315 | |
| Person / Time | |
|---|---|
| Issue date: | 06/05/2012 |
| From: | Office of the Chief Human Capital Officer |
| To: | |
| References | |
| Download: ML12157A315 (55) | |
Text
s Codes Codes gy and gy and hnolog hnolog The Petrographic Report te Tech te Tech Concret Concret C
Petrographic Examination Petrographic Examination What is it?
What is it?
How is it done?
What can it do?
What can it do?
What cant it do?
What will the petrographic report say?
What will the petrographic report say?
How do I critically read a petrographic report?
report?
Structural Evaluation Structural Evaluation LARGE LARGE scale to small scale
Structural Evaluation Structural Evaluation ACI 364.1R Guide for Evaluation of ACI 364.1R Guide for Evaluation of Concrete Structures Prior to Rehabilitation ACI 349.3 Evaluation of Existing Nuclear g
Safety-Related Concrete Structures d
i NDE
- document review
- field inspection
- condition survey
- sampling
- material testing (laboratory)
- condition survey
- material testing (laboratory)
Structural Evaluation Structural Evaluation ACI 364.1 Table 6.1(a)
Evaluation of Properties of Concrete
Structural Evaluation Structural Evaluation ACI 364.1 Table 6.1(b)
Evaluation of Physical Conditions of Concrete
Structural Evaluation Structural Evaluation Importance of Appropriate Samples
Petrography Petrography Defined as the systematic description and Defined as the systematic description and classification of rocks (or concrete),
especially through microscopical examination Methods and techniques for concrete petrography derived from geology, metallurgy, and ceramics
Petrographic Examination Petrographic Examination ASTM C 856 Standard Practice for ASTM C 856 04 Standard Practice for Petrographic Examination of Hardened Concrete Guideline for microscopical analysis of concrete and related materials M
h d d
h i i h Methods and techniques may vary with scope of investigation
Petrographic Examination Petrographic Examination Examine sample as-received Examine sample as received
Petrographic Examination Petrographic Examination Select areas for sub-sampling Select areas for sub sampling
Petrographic Examination Petrographic Examination Lapped surface Lapped surface
Petrographic Examination Petrographic Examination Stereomicroscope Stereomicroscope
Petrographic Examination Petrographic Examination Fresh fracture Fresh fracture
Petrographic Examination Petrographic Examination Thin section Thin section
Petrographic Examination Petrographic Examination Polarized light (petrographic) microscope Polarized light (petrographic) microscope
Petrographic Examination Petrographic Examination Powder mount Powder mount
Petrographic Examination CAN Describe the general composition, quality, Describe the general composition, quality, and condition of the concrete and its constituents
Petrographic Examination CAN Estimate air content and adequacy of air-Estimate air content and adequacy of air void system
Petrographic Examination CAN Identify supplementary cementing Identify supplementary cementing materials
Petrographic Examination CAN Determine general compliance with mix Determine general compliance with mix design (aggregates, air content, SCMs, w/c)
Petrographic Examination CAN Determine depth of paste carbonation Determine depth of paste carbonation
Petrographic Examination CAN Evaluate workmanship (consolidation, Evaluate workmanship (consolidation, finishing, curing)
Petrographic Examination CAN Evaluate possible causes of distress Evaluate possible causes of distress
Petrographic Examination CAN Recommend additional tests to Recommend additional tests to investigate the problem Air void system analysis (ASTM C457)
Air void system analysis (ASTM C457)
Scanning electron microscopy (SEM-EDX)
Cement content analysis (ASTM C1084)
Compressive strength testing (ASTM C42)
X-ray diffraction X-ray fluorescence X ray fluorescence Chemical tests
Petrographic Examination
CANT Determine cement content Determine cement content Determine cement type Confirm presence type or quantity of Confirm presence, type, or quantity of chemical admixtures Determine timing of water additions Determine timing of water additions Determine precise proportions of mix Determine concrete strength Determine concrete strength
Petrographic Report Petrographic Report Background information/ reason for testing Background information/ reason for testing Conclusions Summary of observations Summary of observations Discussion Methodology of examination Methodology of examination Photographs D t Data pages
Evaluating a Report Evaluating a Report Were samples representative?
Were samples representative?
Do observations/data agree and seem plausible?
p Do photographs illustrate observations?
Do conclusions drawn from observations Do conclusions drawn from observations seem logical?
Is original question addressed?
Is original question addressed?
NEVER BE AFRAID TO QUESTION THE NEVER BE AFRAID TO QUESTION THE PETROGRAPHER!