Intrinsic strength and microstructure of hydrated C3S

✍ Scribed by A. Bentur

• Book ID: 102995634
• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 492 KB
• Volume: 6
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(76)90086-7

✦ Synopsis

In previous work it was shown that addition of gypsum to hydrating C3S changes the intrinsic strength of the CSH gel. In the present work an attempt was made to find whether this change could be correlated with variations in pore structure, measured by nitrogen adsorption. The results indicated that at the stage where intrinsic strength is independent of gypsum content (about 40% hydration) the analysis of the adsorption and desorption curves could not reveal any changes in the microstructure. At the stage where the intrinsic strength decreases with increase in gypsum content (about 60% hydration) the pore analysis indicated changes in microstructure. The pure C~S could be described better by a cylindrical pore model while the highest gypsum content paste was better accounted for by a parallel plate model.