Microsoft Word 7- part d doh test Methods doc

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D-27 
MAKING AND CURING CONCRETE
COMPRESSION AND FLEXURAL TEST
SPECIMENS IN THE FIELD 
 
1. SCOPE 
 
1.1 This method covers procedures for making and curing compression and flexure test 
specimens of concrete sampled from project sites. 
2. REFERENCED 
DOCUMENTS 
 
2.1 AASHTO Standards 
• 
T23, Making and Curing Concrete Test Specimens in the Field 
• 
T119, Slump of Hydraulic Cement Concrete 
• 
T121, Mass per Cubic Meter (Cubic Foot), Yield, and Air Content (Gravimetric) of 
Concrete 
• 
T152, Air Content of Freshly Mixed Concrete by the Pressure Method 
• 
T199, Air Content of Freshly Mixed Concrete by the Chace Indicator 
2.2 DOH Standards 
• 
10, Sampling Fresh Portland Cement Concrete 
3. APPARATUS 
 
3.1 
Cylinder Molds
– Reusable cylinder molds shall conform to the requirements of AASHTO 
T23. Single use molds shall conform to AASHTO T23 for forming 6” x 12” (15 cm x 30.5 
cm) and 4” x 8” (10 cm x 20 cm) specimens. 
3.2 
Beam Molds
– Beam molds shall conform to the requirements of AASHTO T23 
3.3 
Tamping Rod
– The rod shall be a round, straight steel rod, 5/8” (16 mm) in diameters and 
24” (610 mm) long with at least the tamping end rounded to a hemispherical tip of the same 
diameter.
3.4 
Small Tools
– Various tools such as shovels, pails, trowels, wood float, straightedge, scoops, 
rulers, and other items as required. 
3.5 
Slump Apparatus
– The apparatus for measurement of slump shall conform to the 
requirements of AASHTO T119. 
3.6 
Sampling and Mixing Receptacle
– The receptacle shall be a suitable heavy gauge metal 
pan, wheelbarrow, or flat, clean, non-absorbent mixing board to allow easy mixing of the 
entire sample by trowel or shovel. 
DOH 11 

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D-28 
3.7 
Air Content Apparatus
– The apparatus for measurement of air content shall conform to the 
requirements of AASHTO T152, Test for Air Content of Freshly Mixed Concrete by the 
Pressure Method. The apparatus required by AASHTO T199, Air Content of Freshly Mixed 
Concrete by the Chace Indicator, may be used for rapid tests when required, however, the 
pressure meter should be considered standard in cases of dispute.