Fi. Elhosiny et Eam. Gad, EFFECT OF SOME SUPERPLASTICIZERS ON THE MECHANICAL AND PHYSICOCHEMICAL PROPERTIES OF BLENDED CEMENT PASTES, Journal of applied polymer science, 56(2), 1995, pp. 153-159
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 0.2
5 by weight. Three pastes containing admixture (water-soluble condensa
tes) were also prepared using a water-cement ratio of 0.25 and condens
ate (superplasticizer) content of 0.25% by the weight of cement; the s
uperplasticizers used are Na-phenol sulfonate formaldehyde, Na-polysty
rene sulfonate, and Na-beta-naphthol sulfonate formaldehyde condensate
s. All pastes were cured for various time intervals within the range o
f 0.02-90 days. Compressive strength tests, hydration kinetics, X-ray
diffraction analysis, thermal analysis, and surface properties were st
udied and related as much as possible to the pore structure of the har
dened pastes. (C) 1995 John Wiley and Sons, Inc.