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Effect of some superplasticizers on the mechanical and physicochemical properties of blended cement pastes

✍ Scribed by F. I. El-Hosiny; E. A. M. Gad

Publisher: John Wiley and Sons
Year: 1995
Tongue: English
Weight: 490 KB
Volume: 56
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.1995.070560205

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✦ Synopsis

Blended cement pastes made of Portland cement and fine sand (known in Egypt as El-Karnak cement) were made using a water-cement ratio of 0.25 by weight. Three pastes containing admixture (water-soluble condensates) were also prepared using a water-cement ratio of 0.25 and condensate (superplasticizer) content of 0.25% by the weight of cement; the superplasticizers used are Na-phenol sulfonate formaldehyde, Na-polystyrene sulfonate, and Na-@-naphthol sulfonate formaldehyde condensates. All pastes were cured for various time intervals within the range of 0.02-90 days. Compressive strength tests, hydration kinetics, X-ray diffraction analysis, thermal analysis, and surface properties were studied and related as much as possible to the pore structure of the hardened pastes. 0 1995

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