Application of electro thermal phosphoric slag as a binder for foam concrete production
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Author |
Y. T. Yerbayev, G. B. Zhumagaliyeva, A. K. Abdygalieva, M. Zh. Ryskaliyev, L. T. Shulanbayeva, R. K. Shegenbayeva, G. S. Abiyeva and K. A. Yerimbetov
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e-ISSN |
1819-6608 |
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On Pages
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836-843
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Volume No. |
18
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Issue No. |
07
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Issue Date |
May 30, 2023
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DOI |
https://doi.org/10.59018/0423111
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Keywords |
foam concrete, granulated electrothermal phosphoric slag, foaming agent, technological parameters, physicochemical characteristics of a foaming agent, foam concrete mixture.
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Abstract
The high pace of urban construction leads to a constant search for practical and inexpensive materials with the necessary thermal properties. Such materials that meet the requirements of energy saving are foam concrete of non-autoclave hardening. An urgent problem of the modern construction industry is the acute shortage and high cost of Portland cement used for the production of foam concrete as a binder. The study aimed to determine the most effective way of processing materials to activate the binder. The article provides information on the greater efficiency of applying impact grinders to activate the binder as compared to shock-abrasion units (ball mills). It is proved that when activating the binder in ball mills, cement particles have a rounded spherical shape, while in impact grinders, the binder particles acquire a crushed stone shape, i.e., such particles are more chemically reactive. Using granulated electrothermal phosphoric slag with the addition of cement in the amount of 10% and grinding the obtained mixture in an impact grinder allows producing a binder with an activity of 500-550 kgf/cm2. Introducing the MB-01 and Aquatron-8 curing modifiers into this binder allows for obtaining a high-strength binder with an activity of 600-700 kgf/cm2. The beginning and end times of the binder setting ranged from 55 minutes to 6.5 hours, respectively, which meets the requirements for preparing foam concretes using non-autoclave technology.
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