| Alternative title | Instabilité en volume de solides poreux |
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| Download | - View final version: Volume instability of porous solids: Part I (PDF, 868 KiB)
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| Author | Search for: Litvan, G. G.1 |
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| Affiliation | - National Research Council of Canada
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| Format | Text, Article |
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| Conference | 7th International Congress on the Chemistry of Cement, 1980, Paris, France |
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| Subject | porosity; adsorption; silica glass; hydrated cement; deterioration |
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| Abstract | A 27 X 10⁻⁵ fractional length change occurred in a water- saturated porous silica glass on adsorption of NaNO₃ from aqueous solution. The specimen suffered a 50 X 10⁻⁵ Deltal/l irreversible length change after determination of the extension adsorption isotherm. The isotherm greatly resembles that obtained on water vapour adsorption by dry glass, and exhibits marked hysteresis in all concentration regions. An expansion of 325 X 10⁻⁵ Deltal/l was found while porous glass was under attack from 0.2 N NaOH; and 125 X 10⁻⁵ Deltal/l length change occurred during the dissolution in 1.0 N HCl of a 0.5 W/C hydrated cement specimen. On leaching lime from 0.6 W/C cement paste with ethylene glycol, 120 X 10⁻⁵ Deltal/l was observed. These results introduce an additional factor that may explain the deterioration process of porous solids exposed to some chemicals, for example, in alkali aggregate reaction, sulfate attack and seawater attack. |
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| Publication date | 1980 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Identifier | DBR-P-981 |
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| NRC number | NRCC 19449
NRC-IRC-96 |
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| NPARC number | 20331334 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | a65fb0c3-60e7-4f1c-a06c-5b1847da0cef |
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| Record created | 2012-07-18 |
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| Record modified | 2024-03-19 |
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