1. |
Data Collected |
|
| 1.1 |
Electrical conductance of the concrete, an indication of resistance of the concrete to chloride ion penetration. |
|
|
2. |
Equipment and Personnel Requirements |
|
| 2.1 |
Equipment: |
|
| 2.1.1 |
PRE-PL-LO-004, Personal Health and Safety Plan. |
|
| 2.1.2 |
Test specimens. |
|
| 2.1.3 |
Applied voltage cell as specified in ASTM C1202-12. |
|
| 2.1.4 |
Apparatus specified in Section 6 of ASTM C1202-12. |
|
| 2.1.5 |
Digital camera. |
|
| 2.2 |
Personnel: PRE-PL-LO-005, Personnel Qualifications. |
|
|
3. |
Methodology |
|
| 3.1 |
Test preparation: |
|
| 3.1.1 |
Use a 2.5-inch diameter core that has been properly obtained, prepared, and stored using FLD‑DC-MS-001, Wet Coring of Concrete Decks. |
|
| 3.1.2 |
Record the unique core identifier, and note any damage to the wrapping. |
|
| 3.1.3 |
Unwrap the core, removing all four layers of wrapping. Compare the sample number and other descriptive information on the wrapping with the similar data on the unwrapped core. |
|
| 3.1.4 |
Weigh and record the weight of the core as-received, uncut sample. |
|
| 3.1.5 |
Photograph the sample (top, bottom, and sides at four quadrants), and create a photo log, following FLD-DC-PH-002, Photographing for Documentation Purposes. |
|
| 3.2 |
Core sampling: |
|
| 3.2.1 |
For each core, if conducting both the permeability test and the chloride profile test, use the top 3inches of the core for the chloride profile and the remainder of the core for the permeability test. |
|
| 3.2.2 |
For each core, if conducting only the permeability test, use the top 2 inches of the core for the permeability test. |
|
| 3.3 |
Laboratory testing: |
|
| 3.3.1 |
Conduct the test to measure the electrical conductance of the concrete and determine the total charge passed over the test period, in accordance with ASTM C1202-12, and record the following: |
|
| 3.3.1.1 |
Unique core identifier. |
|
| 3.3.1.2 |
Location of the core on the bridge. |
|
| 3.3.1.3 |
Location of the test specimen for this test within the core. |
|
| 3.3.1.4 |
Description of the test specimen, including location and thickness of reinforcing steel, overlays, and/or surface treatments. |
|
| 3.3.1.5 |
Curing history of the specimen itself immediately prior to the test—moist curing, extended moist curing, or accelerated moist curing (as per section 8 of ASTM C1202-12). |
|
| 3.3.1.6 |
Any special surface preparation of the test specimen. |
|
| 3.3.1.7 |
Plot of current versus time. |
|
| 3.3.1.8 |
The total charge passed during the test period, in coulombs (ampere-seconds). |
|
| 3.4 |
Storing data, documents, and images: |
|
| 3.4.1 |
FLD-DS-LS-001, Data, Document, and Image Storage—Local, for local storage. |
|
| 3.4.2 |
FLD-DS-RS-001, Data, Document, and Image Storage—Remote, for remote storage. |
|
| 3.5 |
Reporting: Transfer all metadata, data, documents, and images to Federal Highway Administration (FHWA), and/or upload all metadata, data, documents, and images into the Long-Term Bridge Performance (LTBP) Bridge Portal. |
|
|
4. |
Data Collection Table |
|
| 4.1 |
Table: |
|
| # |
Field Name |
Data Type |
Accuracy |
Unit |
Field Description |
Row Color |
| 1 |
State |
Text |
Text |
|
State Code, e.g., Virginia = VA |
Green |
| 2 |
NBI structure number |
Text |
Text |
|
Item 8, Structure Number from NBI Coding Guide |
Green |
| 3 |
Structure name |
Text |
Text |
|
Descriptive name for the bridge, e.g., Route 15 SB over I–66 |
Green |
| 4 |
Protocol name |
Text |
Text |
|
Title of the protocol |
Green |
| 5 |
Protocol version |
Text |
Month and year |
|
Month and year the protocol version was published; e.g., May 2015 |
Green |
| 6 |
Personnel performing testing activities |
Text |
Text |
|
First name(s) Last name(s) |
Green |
| 7 |
Date testing was performed |
Text |
Exact date |
|
mm/dd/yyyy |
Green |
| 8 |
Equipment name |
Text |
Text |
|
|
Green |
| 9 |
Equipment manufacturer |
Text |
Text |
|
|
Green |
| 10 |
Equipment model name and number |
Text |
Text |
|
If available |
Green |
| 11 |
Equipment comments |
Text |
Unlimited |
|
|
Orange |
| 12 |
Unique core identifier |
Text |
|
|
|
Blue |
| 13 |
Weight of uncut sample |
Number |
0.1 |
pounds |
|
Yellow |
| 14 |
Sampling site |
Text |
|
|
Location of core extraction on the bridge (e.g., span number, lane number, right or left shoulder, etc.) |
Yellow |
| 15 |
Location of the test specimen within the core |
Text |
|
|
For example: top 2 inches of the core, 2 inches to 4 inches from the top of the core, bottom 2 inches of the core, etc. |
Yellow |
| 16 |
Description of the test specimen |
Text |
|
|
Presence, location, and thickness of any reinforcing steel, overlay, or surface treatment |
Yellow |
| 17 |
Curing history of the test specimen |
Text |
|
|
Moist Curing/Extended
Moist Curing/Accelerated
Moist Curing
[Note: As per section 8 of ASTM C1202-12] |
Yellow |
| 18 |
Any special surface preparation of the test specimen |
Text |
|
|
|
Yellow |
| 19 |
Plot of current versus time |
BLOB |
|
|
|
Yellow |
| 20 |
Total charge passed |
Number |
1 |
C |
|
Yellow |
| 21 |
Comments |
Text |
|
|
|
Orange |
|
| 4.2 |
Table Key: |
|
| Column Descriptions |
# |
Sequential number of data item |
Field Name |
Data field name |
Data Type |
Type of data, such as text, number, predefined list, binary large object (BLOB), or PDF file |
Accuracy |
Accuracy to which the data are recorded |
Unit |
Unit in which a measurement is taken and recorded |
Field Description |
Commentary on the data or list of items in a predefined list |
| Row Color Key |
Green |
Data items only entered once for each protocol for each day the protocol is applied |
Pink |
Logical breakdown of data by elements or defect types (not always used) |
Blue |
Data identifying the element being evaluated or the type of defect being identified |
Yellow |
LTBP data reported individually for each element or defect identified |
Orange |
Comments on the data collection or data entered |
|
|
5. |
Criteria for Data Validation |
|
| 5.1 |
Precision, bias, and repeatability of the individual tests outlined herein are addressed in ASTM C1202-12. |
|
|
6. |
Commentary/Background |
|
| 6.1 |
The purpose of this protocol is to assess the quality of the concrete regarding the permeability and resistance to chloride ion penetration by lab testing of the concrete cores taken by wet coring (FLD-DC-MS-001, Wet Coring of Concrete Decks) from the bridge. |
|
| 6.2 |
If the concrete sample (core) contains distinguishing features about the quality or condition of the material, conduct and record a visual condition assessment (include details about paste, aggregate type and distribution, defects, deleterious reactions). Take additional photographs as appropriate to record these features. |
|
|
7. |
References |
|
| 7.1 |
LTBP Protocols: |
|
| 7.1.1 |
PRE-PL-LO-004, Personal Health and Safety Plan. |
|
| 7.1.2 |
PRE-PL-LO-005, Personnel Qualifications. |
|
| 7.1.3 |
FLD-DC-MS-001, Wet Coring of Concrete Decks. |
|
| 7.1.4 |
FLD-DC-PH-002, Photographing for Documentation Purposes. |
|
| 7.1.5 |
FLD-DS-LS-001, Data, Document, and Image Storage—Local. |
|
| 7.1.6 |
FLD-DS-RS-001, Data, Document, and Image Storage—Remote. |
|
| 7.2 |
External: |
|
| 7.2.1 |
ASTMC1202-12, Standard Test Method for Electrical Indication of Concrete’s Ability to Resist Chloride Ion Penetration, ASTM International, West Conshohocken, PA, 2012. |
|
