1. |
Data Collected |
|
1.1 |
Compressive strength and static and dynamic elastic moduli of concrete cores. |
|
|
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 |
Compression testing machine meeting the requirements of AASHTO T 22-10 (2011). |
|
2.1.4 |
Testing apparatus for determining dynamic modulus of elasticity, conforming to the requirements of ASTM C215-14. |
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2.1.5 |
Compressometer for determining the static modulus of elasticity, conforming to the requirements of ASTM C469/C469M-14. |
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2.1.6 |
Digital camera. |
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2.2 |
Personnel: PRE-PL-LO-005, Personnel Qualifications. |
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3. |
Methodology |
|
3.1 |
Test preparation: |
|
3.1.1 |
A minimum 5-day waiting period between encapsulation of the cores and unwrapping for testing of the cores is recommended to minimize moisture gradients. |
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3.1.2 |
Use a 4-inch diameter core that has been properly obtained and prepared for storage using FLD‑DC-MS-001, Wet Coring of Concrete Decks. Record the unique core identifier, and note any damage to the wrapping. |
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3.1.3 |
Unwrap the core, removing all four layers of wrapping. Compare sample number and other descriptive information on the wrapping with the similar data on the unwrapped core. |
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3.1.4 |
Weigh the uncut sample immediately, and record the result. |
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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. |
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3.2 |
Core testing: |
|
3.2.1 |
Conduct dynamic modulus test of the core, and calculate the dynamic Young’s modulus of elasticity, all in accordance with ASTM C215, and record the following: |
|
3.2.1.1 |
Unique core identifier. |
|
3.2.1.2 |
Diameter. |
|
3.2.1.3 |
Length. |
|
3.2.1.4 |
Mass. |
|
3.2.1.5 |
Description of any defects, including the presence of reinforcement. |
|
3.2.1.6 |
Mode of vibration. |
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3.2.1.7 |
Corresponding resonant frequency. |
|
3.2.1.8 |
Dynamic Young’s modulus of elasticity. |
|
3.2.1.9 |
Correction factor. |
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3.2.2 |
Using the same core, conduct test for static modulus of elasticity of the core, and calculate the static modulus of elasticity, all in accordance with ASTM C469, and record the following: |
|
3.2.2.1 |
Curing and environmental histories of the core. |
|
3.2.2.2 |
Age of the core. |
|
3.2.2.3 |
Unit weight of the concrete. |
|
3.2.2.4 |
Stress–strain curves. |
|
3.2.2.5 |
Static modulus of elasticity (chord modulus of elasticity). |
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3.2.3 |
Using the same core, conduct compressive strength test of core in accordance with AASHTOT22-10 (2011), and record the following: |
|
3.2.3.1 |
Maximum load. |
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3.2.3.2 |
Compressive strength. |
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3.2.3.3 |
Type of fracture. |
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3.3 |
Storing data, documents, and images: |
|
3.3.1 |
FLD-DS-LS-001, Data, Document, and Image Storage—Local, for local storage. |
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3.3.2 |
FLD-DS-RS-001, Data, Document, and Image Storage—Remote, for remote storage. |
|
3.4 |
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. |
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4. |
Data Collection Table |
|
4.1 |
Table: |
|
# |
Field Name |
Data Type |
Accuracy |
Unit |
Field Description |
Row Color |
1 |
State |
Text |
|
|
State Code; e.g., Virginia = VA |
Green |
2 |
NBI structure number |
Text |
|
|
Item 8, structure number; from NBI Coding Guide |
Green |
3 |
Structure name |
Text |
|
|
Descriptive name for the bridge; e.g., Route 15 SB over I–66 |
Green |
4 |
Protocol name |
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 |
|
|
First name(s) Last name(s) |
Green |
7 |
Date testing was performed |
Text |
Exact date |
|
mm/dd/yyyy |
Green |
8 |
Sampling site |
Text |
|
|
Location of core extraction on the bridge (e.g., span number, lane number, right or left shoulder, etc.) |
Blue |
9 |
Unique core identifier |
Text |
|
|
|
Blue |
Dynamic Modulus of Elasticity |
Pink |
10 |
Equipment name |
Text |
|
|
|
Green |
11 |
Equipment manufacturer |
Text |
|
|
|
Green |
12 |
Equipment model name and number |
Text |
|
|
If available |
Green |
13 |
Equipment comments |
Text |
|
|
|
Orange |
14 |
Core length |
Number |
0.1 |
in. |
|
Yellow |
15 |
Core diameter |
Number |
0.1 |
in. |
|
Yellow |
16 |
Overlay depth |
Number |
0.1 |
in. |
|
Yellow |
17 |
Description of any defects, including the presence of reinforcement |
Text |
|
|
|
Yellow |
18 |
Mass |
Number |
0.5 |
kg |
|
Yellow |
19 |
Mode of vibration |
Text |
|
|
|
Yellow |
20 |
Resonant frequency |
Number |
10 |
Hz |
|
Yellow |
21 |
Dynamic modulus |
Number |
0.05x106 |
psi |
|
Yellow |
22 |
Correction factor |
Number |
0.01 |
|
Range: 1.00 to 6.34 |
Yellow |
23 |
Comments |
Text |
|
|
|
Orange |
Static Modulus of Elasticity |
Pink |
24 |
Equipment name |
Text |
|
|
|
Green |
25 |
Equipment manufacturer |
Text |
|
|
|
Green |
26 |
Equipment model name and number |
Text |
|
|
If available |
Green |
27 |
Equipment comments |
Text |
|
|
|
Orange |
28 |
Curing and environmental history of the core |
Text |
|
|
|
Yellow |
29 |
Age of the core |
|
|
|
|
Yellow |
30 |
Unit weight of the core |
|
|
|
|
Yellow |
31 |
Stress-strain curves |
BLOB |
|
|
|
Yellow |
32 |
Static modulus of elasticity |
|
0.05 x106 |
psi |
|
Yellow |
33 |
Comments |
Text |
|
|
|
Orange |
Compressive Strength |
Pink |
34 |
Equipment name |
Text |
|
|
|
Green |
35 |
Equipment manufacturer |
Text |
|
|
|
Green |
36 |
Equipment model name & number |
Text |
|
|
If available |
Green |
37 |
Equipment comments |
Text |
|
|
|
Orange |
38 |
Maximum load |
Number |
1 |
lbs |
|
Yellow |
39 |
Compressive strength |
Number |
10 |
psi |
|
Yellow |
40 |
Type of fracture |
Text |
|
|
|
Yellow |
41 |
Comments |
Text |
Unlimited |
|
|
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 |
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|
5. |
Criteria for Data Validation |
|
5.1 |
Precision, bias, and repeatability of the individual tests outlined herein are addressed in the respective AASHTO and ASTM standards that govern the laboratory tests being conducted. |
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6. |
Commentary/Background |
|
6.1 |
The purpose of this protocol is to obtain physical parameters useful for structural evaluation of the concrete bridge members by lab testing of the concrete cores taken by wet coring (FLD‑DC‑MS-001, Wet Coring of Concrete Decks) of reinforced concrete decks. |
|
6.2 |
If the concrete core contains distinguishing features about the quality or condition of the material, conduct a visual condition assessment and record details about paste, aggregate type and distribution, defects, deleterious reactions, and embedded items. |
|
6.3 |
For static elastic modulus testing, if the outside diameters of the samples are not 4 inches (102 mm), or the lengths are insufficient to fit the elastic modulus jig, adhere two concrete strain gages of no less than three times the nominal aggregate size to diametrically opposite faces. |
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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 |
AASHTO T 22-10 (2011), Standard Method of Test for Compressive Strengths of Cylindrical Concrete Specimens, American Association of State Highway and Transportation Officials, Washington, DC, 2011. |
|
7.2.2 |
ASTMC215-14, Standard Test Method for Fundamental Transverse, Longitudinal, and Torsional Resonant Frequencies of Concrete Specimens, ASTM International, West Conshohocken, PA, 2014. |
|
7.2.3 |
ASTMC469/C469M-14, Standard Test Method for Static Modulus of Elasticity and Poisson’s Ratio of Concrete in Compression, ASTM International, West Conshohocken, PA, 2014. |
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