The Increase of Hydration Activity of Portland Cement by Additives of Crystalline Hydrates
| Autor: | Yury R. Krivoborodov, Svetlana Samchenko |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Cement
Materials science Mechanical Engineering Metallurgy 0211 other engineering and technologies 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics law.invention Portland cement Mechanics of Materials law 021105 building & construction Hardening (metallurgy) General Materials Science 0210 nano-technology |
| Zdroj: | Materials Science Forum. 974:195-200 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.974.195 |
| Popis: | The article presents the results of a study of the effect of synthesized microdisperse additives of crystalline hydrates based on calcium sulfoaluminates on the properties of cement stone. The effectiveness of the use of a rotary pulsation apparatus (RPA) to obtain microdispersed additives is identified. The possibility of accelerating the hardening of cement stone by entering microdispersed additives into its composition is shown. It has been established that in the presence of microdispersed additives of crystalline hydrates in the cement stone, the phase composition of hydrate tumors changes, the amount of calcium hydrosilicates and ettringite increases, the porosity decreases and the strength of the cement stone increases. This provision is confirmed by the increase in the degree of cement hydration, the amount of bound water in all periods of hardening of the stone. It is proposed to use microdisperse additives, which play the role of primers for the crystallization of ettringite and calcium hydrosilicates, to increase the strength of cement stone in the early stages of hardening. |
| Databáze: | OpenAIRE |
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