ASTM D3497-79(1995),Standard Test Method for Dynamic Modulus of Asphalt Mixtures.ASTM D3497-79(1995) pdf free download.
ASTM D3497-79(1995) covers procedures for preparing and testing asphalt mixtures to determine dynamic modulus values. The procedure described covers a range of both temperature and loading frequency. The minimum recommended test series consists of testing at 41, 77, and 104°F (5, 25, and 40°C) at loading frequencies of 1, 4, and 16 Hz for each temperature.
ASTM D3497-79(1995) is applicable to asphalt paving mixtures similar to mixes 3A, 4A, 5A, 6A, and 7A, as defined by Specification D 3515.
For laboratory-molded specimens, test three specimens at each lemperature and frequency condition Twice. Conduct tests in same order as pavement cores (8.4 ).Run the replicate tests before the temperature is changed for the three frequencies. Bring the specimens to the specified test temperature before each test.
8.6 Monitor both the loading stress and axial strain during Ihe test. Increase the recorder chart speed such that 1 cycle covers 10 to 20 mm of chart paper for five to ten repetitions before the end of the test.
8.7 Complete the loading for the test within 2 min from the time specimens are removed from the temperature-control cabinet.