U.S. Department of Transportation
Federal Highway Administration
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Federal Highway Administration Research and Technology
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Publication Number: FHWA-RD-07-052
Date: September 2007
This protocol covers the determination of the specific gravity, density, percent absorption and percent voids in PCC. The test shall be conducted in accordance with ASTM C642-97 as modified herein. Sections of the referenced standard which have been modified are included below. In all other sections, the standard (ASTM C642-97) shall be followed as written. The test shall be performed on PCC cores or portions of PCC cores extracted from test sections included in the LTPP experiments. The following definitions will be used throughout this protocol:
1.1 This test method covers the determinations of specific gravity, density, percent absorption and percent voids in PCC core specimens or portions thereof.
4.1 The specimens shall be PCC cores or portions thereof. These cores or pieces shall be of one layer of the PCC pavement and shall be free from observable cracks, fissures or shattered edges.
6.2 Calculate the density of the concrete using the following equation:
Density = 62.36g1
where: g1 = Bulk specific gravity, dry.
Record the following information on Form T65:
8.1 Sample identification shall include: Laboratory Identification Code, Region, State, State Code, SHRP ID, Field Set Number, Sampling Area Number, Layer Number, Location Number, and LTPP Sample Number.
8.2 Test identification shall include: LTPP Test Designation, LTPP Protocol Number, Laboratory Test Number, and the Test Date.
8.3 Test Results
8.3.1 Weight of oven-dried specimen in air (A), grams.
8.3.2 Weight of surface-dry specimen in air after immersion (B), grams.
8.3.3 Weight of surface-dry sample in air after immersion and boiling (C), grams.
8.3.4 Weight of sample in water after immersion and boiling (D), grams.
8.3.5 Percent absorption after immersion (to one decimal place).
8.3.6 Bulk specific gravity, dry (g1) (to two decimal places).
8.3.7 Apparent specific gravity (g2) (to two decimal places).
8.3.8 Density (to one decimal place).
8.3.9 Percent voids in PCC (to one decimal place).
8.3.10 Comments shall include: LTPP standard comment code(s), as shown in Section 4.3 of this Guide, and any other note as needed.
LTPP LABORATORY MATERIAL HANDLING AND TESTING
LABORATORY MATERIAL TEST DATA
DENSITY OF PORTLAND CEMENT CONCRETE
LAB DATA SHEET T65
PORTLAND CEMENT CONCRETE
LTPP TEST DESIGNATION PC05/LTPP PROTOCOL P65
LABORATORY PERFORMING TEST:______________________________________________________________
LABORATORY IDENTIFICATION CODE: __ __ __ __
REGION______________ STATE_______________________ STATE CODE __ __
EXPERIMENT NO ________ SHRP ID __ __ __ __
SAMPLED BY: _____________________________________________ FIELD SET NO. _ __
REGIONAL DRILLING AND SAMPLING CONTRACTOR SAMPLING AREA NO SA- __ __
SAMPLING DATE: __ __-__ __-__ __ __ __
1. LAYER NUMBER __ _
2. LOCATION NUMBER __ __ __
3. LABORATORY TEST NUMBER __ _
4. LTPP SAMPLE NUMBER __ __ __ __
5. WEIGHT OF OVEN-DRIED SPECIMEN IN AIR (A), grams __ __ __ __ __.__
6. WEIGHT OF SURFACE-DRY SPECIMEN IN AIR AFTER IMMERSION (B), grams __ __ __ __ __.__
7. WEIGHT OF SURFACE-DRY SPECIMEN IN AIR AFTER IMMERSION AND BOILING (C), grams
__ __ __ __ __.__
8. WEIGHT OF TEST SPECIMEN IN WATER AFTER IMMERSION AND BOILING (D), grams
__ __ __ __ __.__
9. PERCENT ABSORPTION AFTER IMMERSION, % __.__
10. BULK SPECIFIC GRAVITY, DRY __ __.__ __
11. APPARENT SPECIFIC GRAVITY __ __.__ __
12. DENSITY OF PCC , lb/ft3 __ __ __.__
13. PERCENT VOIDS IN PCC, % __.__
(a) CODE __ __ __ __ __ __
__ __ __ __ __ __
(b) NOTE ________________________________________________________
15. TEST DATE __ __ - __ __ - __ __ __ __
|SUBMITTED BY, DATE||CHECKED AND APPROVED, DATE|
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