| Download | - View final version: Extraction of CaOH2 from portland cement and 3CaOSiO2 pastes (PDF, 1.2 MiB)
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| Author | Search for: Ramachandran, V. S.1; Search for: Polomark, G. M.1 |
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| Affiliation | - National Research Council of Canada
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| Format | Text, Article |
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| Subject | Concrete; cement; calcium; hydroxides; extraction (chemistry); lime extraction; tricalcium silicate pastes |
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| Abstract | A procedure for extracting free lime from mature pastes of Portland cement and tricalcium silicate is described. It involves exposure of thin discs of paste to an aqueous solution of Ca(OH)[2] in such a way that the concentration of the solution remains in the range 9.5-12 mmol CaO dm[-3] throughout the extraction period. Calcium hydroxide remaining in the solid is estimated by differential scanning calorimetry and that in the extractant is estimated by atomic absorption spectrophotometry. Investigations of the extracted samples by scanning electron microscope, helium pycnometry, X-ray diffraction, mercury porosimetry and thermogravimetry indicate that the extraction procedure has no significant influence on the C-S-H phase. |
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| Publication date | 1982 |
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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-1095 |
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| NRC number | NRCC 21200
NRC-IRC-3683 |
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| NPARC number | 20375683 |
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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 | 9273fe5c-80b3-4be1-8e99-ce3985466beb |
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| Record created | 2012-07-23 |
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| Record modified | 2024-03-22 |
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