Reports

Portland Cement: Pseudomorphs of Original Cement Grains Observed in Hardened Pastes

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Science  02 May 1969:
Vol. 164, Issue 3879, pp. 549-551
DOI: 10.1126/science.164.3879.549

Abstract

Scanning electron micrographs show that a hydration product forms inside the anhydrous cement grains and forms a pseudomorph of the original cement grain. The originally water-filled space between the grains is partially filled with calcium hydroxide crystals that appear to be responsible for the strength of the cement paste.