Fly Ash and Cation Effects on Free Cl- and OH- Concentrations in Mortar
| Autor: | M.N. Haque, O.A. Kayyali, M. Kawamura |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
inorganic chemicals
Cement Sodium Inorganic chemistry Alkalinity chemistry.chemical_element macromolecular substances Building and Construction Chloride law.invention Portland cement chemistry Mechanics of Materials law Fly ash medicine General Materials Science Cementitious Mortar Civil and Structural Engineering medicine.drug |
| Zdroj: | Journal of Materials in Civil Engineering. 3:113-124 |
| ISSN: | 1943-5533 0899-1561 |
| Popis: | Chlorides as CaCl2 and NaCl were added in differing dosages to mixes of portland cement and fly ash‐portland cement mortars. Cylindrical mortar specimens were sealed and cured in a fog room for periods varying from one to 28 weeks. Expressed pore solution was analyzed for OH- and Cl- ions. The results indicate that the cations influence the levels of OH- and Cl-; NaCl raised the OH- level, and CaCl2 lowered it. Free Cl- was higher with NaCl addition than with the addition of CaCl2. The results also indicated that the presence of fly ash decreases OH- concentration specially when CaCl2 is the additive. Fly ash presence resulted in a higher Cl-/OH- ratio in both cases of CaCl2 and NaCl additions of up to 1.5% of Cl- by weight of the cementitious material. |
| Databáze: | OpenAIRE |
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