(PDF) Designation: C33/C33M − 13 Standard Specification ...
Originally approved in 1921. Last previous edition approved in 2011 as C33/C33M – 11A. 3 DOI: 10.1520/C0033_C0033M-13. For referenced ASTM standards, visit the ASTM website,, or 2 For lightweight aggregates, see Specifications C330, C331, and C332; for contact ASTM Customer Service at [email protected].