|
|
| • | 1. Test specimens should be fully hydrated concrete (e.g., >3 months curing) to prevent detectable structural changes during testing. |
| • | 2. Test specimens should be cylindrical, either cut from cast cylinders or extracted from cores. |
| • | 3. A typical cylindrical specimen should be 100 ± 2 mm (i.e. 4 inches) in diameter. All specimens from a single material should have equal diameters. |
| • | 4. Two 11±-mm and 50±-mm thick discs should be cut for each material tested (concrete mixture). |
| • | 5. Three 11 ±1-mm and three 50 ±2-mm specimens should be prepared for each material tested. A specimen preparation is illustrated in Figure 11.9. |
| • | 6. Cut specimens should be kept constantly moist until testing, and should be coated with wax after weighing in air and water (see Section 6). |
Note: Since other tests (e.g., porosity measurements) are usually performed along with the drying test, specimens should be cut from the same concrete cylinder, as shown in Figure 11.9.
Figure11.9 – two specimens for the drying test and one specimen for porosity measurement are cut from a single concrete cylinder.
Web site: http://www.simcotechnologies.com/
