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Publication Number: FHWA-RD-07-052
Date: September 2007
This protocol covers the test method for determining the flexural strength of concrete by the use of a simple beam with third-point loading. This protocol is based on ASTM C78-02 (Flexural Strength of Concrete Using Simple Beam with Third-Point Loading). The test shall be performed in accordance with this standard (ASTM C78-02), as modified herein. Those sections of the ASTM standard included in this protocol by reference and without modification shall be strictly followed. All other sections of this protocol shall be followed as written herein.
Record the following on Form T69.
9.1 Sample identification shall include: Laboratory Identification Code, Region, State, State Code, Experiment Number, SHRP ID, Field Set Number, Sampling Area Number, Layer Number, Location Number, LTPP Sample Number.
9.2 Test identification shall include: LTPP Test Designation, LTPP Protocol Number, Laboratory Test Number, and the Test Date.
9.3 Specimen dimensions including the average width, average depth and span length. All dimensions measured to the nearest 0.05 inches.
9.4 Details of curing history (25 characters or less).
9.5 Moisture condition.
9.6 Specimen age, days.
9.7 Maximum applied load in pounds-force.
9.8 Modulus of rupture calculated to the nearest 5 psi.
9.9 Comments shall include LTPP standard comment code(s), as shown in Section 4.3 of this Guide and any other notes as required. Additional codes for special comments associated with the test method for determining the flexural strength of concrete are given below:
|52||Leather shims used|
LTPP LABORATORY MATERIAL HANDLING AND TESTING
LABORATORY MATERIAL TEST DATA
LAB DATA SHEET T69
PORTLAND CEMENT CONCRETE
LTPP TEST DESIGNATION PC09/LTPP PROTOCOL P69
LABORATORY PERFORMING TEST: _____________________________________________________________
LABORATORY IDENTIFICATION CODE: ___ ___ ___ ___
REGION: _________________________ STATE: STATE CODE: __ __
EXPERIMENT NO: _____ SHRP ID: __ __ __ __
SAMPLED BY: _________________________________________ FIELD SET NO: ___
DATE SAMPLED: __ __ - __ __ - __ __ __ __ SAMPLING AREA NO: SA- ____
1. LAYER NUMBER __ __
2. LOCATION NUMBER __ __ __ __ __
3. LABORATORY TEST NUMBER __ __
4. LTPP SAMPLE NUMBER __ __ __ __ __ __
5. SPECIMEN DIMENSIONS
(a) AVERAGE WIDTH, inches __ __.__ __
(b) AVERAGE DEPTH, inches __ __.__ __
(c) SPAN LENGTH, inches __ __.__ __
6. DETAILS OF CURING HISTORY ____________________________________
7. MOISTURE CONDITION ____________________________________
8. SPECIMEN AGE, days __ __ __ __
9. MAXIMUM APPLIED LOAD, LBF __ __ __ __ __
10. MODULUS OF RUPTURE __ __ __ __
(a) CODE ____ ____ ____ ____ ____ ____
(b) NOTE __________________________________________________
12. TEST DATE __ __-__ __-__ __ __ __
|SUBMITTED BY, DATE||CHECKED AND APPROVED, DATE|
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Topics: research, infrastructure, pavements and materials
Keywords: research, infrastructure, pavements and materials, Asphalt cement, asphalt concrete, field sampling, General Pavement Studies, laboratory testing, LTPP, material properties, pavement layering, Pavement Performance Data Base, portland cement concrete, protocol,Specific Pavement Studies, subbase, subgrade, treated base, unbound base
TRT Terms: research, facilities, transportation, highway facilities, roads, parts of roads, pavements