A gravimetric study of water vapour sorption on hydrated cement pastes
β Scribed by H.H. Willems; K.B. Van Der Velden
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 265 KB
- Volume
- 82
- Category
- Article
- ISSN
- 0040-6031
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π SIMILAR VOLUMES
The photoacoustic signal strength was measured on a series of similar portland cement pastes dried to different water contents. Under appropriate conditions this signal is a function of only the paste's specific heat capacity and thermal conductivity. Because of this, inferences can be made about th
In the initial phase of hydration a partial of the total quantity of water in the cement suspension is sorbed on the surface of hydrated particles and the remaining quantity makes free water decidedly influencing rheological properties of suspension. To determine the quantity of sorbed water the res
Heats as well as entropies of water and nitrogen adsorption on hardened cement pastes of various pore structures were computed. Water vapor adsorption is accompanied by a decrease in integral entropy relative to the liquid state, while nitrogen adsorption Ls accompanied by an increase in integral en
On a series of fully hydrated OPC pastes hydrated at two temperatures (20 and 90 Β°C) and on tricalcium silicate pastes hydrated at 20 o the bound water, chemical shrinkage and density of hydrates were determined. Significant differences were found between the compared groups of materials with respec