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https://store.astm.org/c0359-20.html C359 Standard Test Method for Early Stiffening of Hydraulic-Cement (Mortar Method) standard test hydraulic cement method https://www.star.nesdis.noaa.gov/pub/sod/lsa/rads/data/tx/a/c359/?C=S;O=A https://www.star.nesdis.noaa.gov/pub/sod/lsa/rads/data/tx/a/c359/ - NOAA / NESDIS / STAR File Share