| Autor: |
HANSEN, W. C. |
| Zdroj: |
Journal of the American Concrete Institute; Jan1963, Vol. 60 Issue 1, p141-156, 16p |
| Abstrakt: |
Discusses the structure of hardened portland cement paste from the standpoint of solid state reactions as opposed to through solution reactions and coagulation of a sol to produce a gel. This is followed by calculations designed to determine the nature of the reaction products from data for the evaporable and nonevaporable water contents of the hardened paste. On the assumption that C3S and C2S react with water in the paste to form C3S2H3 which contains one mole of evaporable water and two moles of non-evaporable water, the calculations based on estimated densities suggest that the C4AF and the portion of the C3A which is not combined as calcium sulfoaluminate react with water and CH to form C4AH19 and C4AH19 or possibly solid solutions of these compounds. These calculations also suggest that about one-half of the space determined as porosity by the value ob-tained for evaporable water content is occupied by uncombined water in the saturated hardened paste and that the remaining one-half is space occupied by combined water in crystals. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
