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Science 2 May 1969:
Vol. 164. no. 3879, pp. 549 - 551
DOI: 10.1126/science.164.3879.549
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Articles

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

R. Brady Williamson 1

1 Department of Civil Engineering, University of California, Berkeley 94720

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.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)