Pore structure and strength development of cement composites

✍ Scribed by J. Jambor

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 414 KB
• Volume: 20
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(90)90058-6

✦ Synopsis

~vo stages are to be distinguished in the development of cement composite pore structure. The first sta~e is determined by the composition of the mixture as well as by its mixin~ efficiency and compaction de~ree. Durin~ this sta~e the initial pore structure, characterized by the initial porosit> -P ~ is bei~ /ormed. The second stage of the pore structure development is a consequence of the hydration products creation in hardening cement composite. In dependence on the volume as well as on the kind, morpholo67 and other properties of the created hydration products the total porosity diminishes, the hydration micropores arise and the final pore structure -with a characteristic pore size distribution and micropores shapeis formed.

A close relationship between the pore structure and strength of cement based composites follows from the fact that both these properties depend decisively on the volume, kind and other parameters of hydration products created.