Microsoft Word 7- part d doh test Methods doc

7. CURING 
7.1 Covering After Finishing – To prevent evaporation of water from the unhardened concrete, 
the specimens shall be covered immediately after finishing, preferably with a non-absorptive, 
non-reactive plate or a sheet or bag of tough, durable, impervious plastic. Wet burlap may be 
used for covering, but care must be exercised to keep the burlap wet until the specimens are 
removed from the molds. Placing a sheet of plastic over the burlap will aid in keeping the 
specimen wet. 
7.2 Initial Curing – During the first 24 to 48 hours after molding, all test specimens shall be 
stored under conditions representative of the concrete in the structure or pavement.
Following the period of initial cure, the specimens may be transported to the laboratory for 
subsequent curing and testing. Laboratory curing shall consist of a minimum of 95% 
humidity and a temperature of 73.4 ± 3 ºF (23 ± 0.94º C). 
8. SHIPPING SPECIMENS TO THE LABORATORY 
8.1 Specimens shipped from the field to the laboratory shall be carefully loaded, transported, 
and unloaded to minimize effects of handling.
8.2 Upon receipt by the laboratory, they shall be placed immediately in the required curing 
facility. 

---

D-31 
9. STANDARD TESTING 
9.1 Unless required by the Specifications or special conditions on a project, there are standard 
tests that are performed on Portland cement concrete specimens. 
9.1.1 4 cylinders (two 7-day, two 28-day breaks) 
9.1.2 1 air test (if air entrained concrete) 
9.1.3 1 slump test 
9.2 Additional Air and slump tests for project assurance purposes will be taken as required.
Flexural specimens are made only in special cases, as directed.