ASTM D4015-15e1 PDF Download

ASTM D4015-15e1 is a standard that provides test methods for determining the modulus and damping of soils using fixed-base resonant column devices. These test methods allow for the measurement of the equivalent elastic shear modulus and damping capacity of a soil specimen under different conditions such as strain amplitude of vibration, state of effective stress, and void ratio of the soil. The results obtained from these tests can be used in calculations involving soil-structure interaction and seismic response of soil deposits. It is important to note that the applicability of the results to field conditions will depend on factors such as the degree to which static axial and lateral stresses, void ratios, and other parameters are controlled and simulated during the testing process. The standard also emphasizes the need for competent personnel and appropriate equipment and facilities to ensure reliable results. Compliance with Practice D3740, which evaluates factors affecting the quality of testing, does not guarantee reliable results, as they depend on various factors. The standard specifies two device configurations, Device Type 1 and Device Type 2, that can be used for the testing, with each device applying torque to the top of the specimen and measuring rotational motion and torque transmission, respectively. These test methods focus on determining shear modulus and damping and do not cover the measurement or control of axial and lateral static normal stresses, which may be covered by other test methods. The standard also provides guidelines for significant digits and rounding of recorded and calculated values, as well as explanations of the inch-pound units used and their conversions.