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Other than X-ray fluorescence spectroscopy (XRF) for determination of bulk oxide compositions of pressed pellets or fused beads, or, direct measurements of water-soluble ions in liquids in XRF, or, ion chromatography for water-soluble cations and anions in filtrates of deified water-digested samples, or potentiometric titration for acid or water-soluble chloride, the following gravimetric (wet chemical) analyses are routinely done for concrete and masonry:

  • Determination of soluble silica content in masonry mortar or concrete after digestion in cold hydrochloric acid followed by digestion of the residues in hot sodium hydroxide solution (included in ASTM C 1084 for concrete, or ASTM C 1324 for masonry mortar)

  • Determination of hydrochloric acid-insoluble residue contents of masonry mortars to determine the proportions of acid-insoluble residues, which, based on optical microscope i.e. if determined to contain acid-insoluble siliceous sands correspond to the sand content of mortar (ASTM C 1324)

  • Loss on ignition of masonry mortars by successive heating from ambient temperatures to 110, 550, and 950 degrees C for successive loss of free water, combined water from dehydroxylation of hydrous phases, and, carbon dioxide from decomposition of carbonate phases, respectively (ASTM C 1324)


From standard development to analysis of trace elements, CMC uses ICP-AES facilities of a local laboratory. 



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