Properties and hydration products of lightweight and expansive cements Part II
| Autor: | Vili Lilkov, Georgi Bechev, Nikola Djabarov, Ognyan Petrov |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
musculoskeletal diseases
Cement Materials science technology industry and agriculture Building and Construction engineering.material Microstructure Chemical reaction Portlandite law.invention Cenosphere law Hardening (metallurgy) engineering General Materials Science Composite material Crystallization Thermal analysis |
| Zdroj: | Cement and Concrete Research. 29:1641-1646 |
| ISSN: | 0008-8846 |
| DOI: | 10.1016/s0008-8846(99)00149-0 |
| Popis: | The type and quantity of hydration products in cement stone (plain cement, lightweight cement with cenospheres, and cement mixed with expansive additive) hydrated at 20 and 75°C were studied. The changes in the cement stone structure under the influence of lightweight and expansive additives and raised hardening temperature were studied with complex thermal analysis, infrared spectroscopy, powder X-ray diffraction analysis, and scanning electron microscopy. In the case of raised hardening temperature, the cenospheres and the expansive additive improve the crystallization of hydration products. A chemical reaction between the cenospheres and portlandite formed from the cement hydration was observed, accompanied by a decrease of the portlandite quantity. The expansive additive stimulates the formation of hydration products, which were thermally stable and decompose at temperatures above 600°C. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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