: Many university libraries provide students and faculty with free access through subscriptions like ASTM Compass .
If you cannot purchase the standard, these resources summarize or reference ASTM C642-13: astm c642-13 pdf free download
ASTM International standards are and are generally not available for free legally. Most "free download" links found on third-party file-sharing sites may be unauthorized, potentially outdated, or contain malware. Density, Absorption, and Voids in Hardened Concrete1 : Many university libraries provide students and faculty
The standard prescribes a : drying specimens to a constant mass, immersing them in water for a specified time, and then measuring the mass gain. It also outlines the geometry of test specimens (cylinders or prisms), the drying temperature, immersion conditions, and calculation formulas. or contain malware. Density