| Autor: |
G.F. Averina, K.V. Shuldyakov, T.N. Chernykh |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Procedia Engineering. 206:790-794 |
| ISSN: |
1877-7058 |
| DOI: |
10.1016/j.proeng.2017.10.552 |
| Popis: |
The paper considers the applicability of magnesia building materials based on mining wastes as an alternative material for the stowing mixtures production. The main advantages of such mixtures in comparison to the well-known Portland cement mixtures are shown. I is found out that low water resistance of magnesia binding materials hampers its use in this field. The authors examine the ways of improving water resistance of magnesia binding materials from man-made dolomite in order to create a qualitative stowing mixture on this basis. The effect of various mineral admixtures on properties of dolomite is studied. The comparative analysis of strength and water resistance of the obtained dolomite with these additives is conducted. The phase constitution of the obtained compositions is examined with the help of X-ray analysis. The influence of additives on water resistance and regularity of dimensional change in case of dolomite hardening is determined. Based on the research results the most efficient admixture, i.e. nickel slag and its dosage for obtaining dolomite binders, which meet the requirements imposed for water resistance of stowing mixtures, is chosen. The optimal composition of the stowing mixture with the required water resistance and maximum environmental efficiency is developed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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