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Hardened portland blast-furnace slag cement pastes: I. Effects of additives on surface area and on pore structure

✍ Scribed by R.Sh. Mikhail; W.E. Mourad; V.K. Gouda

Publisher
Elsevier Science
Year
1974
Tongue
English
Weight
672 KB
Volume
4
Category
Article
ISSN
0008-8846

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✦ Synopsis

Portland blast-furnace slag cement pastes were prepared with various water/cement ratios. Specific surface areas and pore structures of the hardened pastes were investigated by nitrogen adsorption. The "accessibility" of the nitrogen molecules to the pore structure is discussed in terms of degree of hydration and total porosities of the pastes. Effect of presence of CaCl 2, a typical steel reinforcement corrosive agent, was also studied, and results indicated that it alters the area and pore structure extensively, to a more "open structure," thus facilitating its own accessibility.

Lime and gypsum addition was also studied in presence and in absence of CaCI 2, and the effect of the Blaine surface area of the unhydrated cement is particularly emphasized in this investigation.

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