Synthesis of Composites on the Basis of Local Raw Materials Under the Influence of Aggressive Environment

Number of journal: 5-2021
Autors:

Al-Surrayvi H.G.H,
Goncharova M.A.,
Zaeva A.G.

DOI: https://doi.org/10.31659/0585-430X-2021-791-5-69-74
УДК: 666.974

 

AbstractAbout AuthorsReferences
The problem of forming the structure of powder-activated composites using local raw materials is addressed. The results of experimental studies of the properties of powder-activated concretes (RPC) when aged in an environment of petroleum products are presented. The physical and strength properties of powder-activated cement composites were studied. The influence of superplasticizers Hyperplast PC200 and Sika viscocrete 5930, microsilica and metal fiber on the construction and technical properties of concrete was investigated. During the experiment, changes in the structure of the hardening systems were evaluated, and the number of shrinkage microcracks was determined using scanning electron microscopy with Vega 3 series equipment. For RPC, the technological regulations for the preparation of mixtures were defined, including the following steps: dry mixing of fine sand and microsilica (4 minutes), adding cement and dry mixing of components (5 minutes) to destroy agglomerates, then gradually adding water containing superplasticizers (3 minutes). When the required normal paste density was reached, the steel fiber was slowly added (2 minutes). Thus, the entire mixing process took about 14 minutes. The optimal RPC compositions for the production of building structures of oil refineries are proposed. The features of the construction of objects in countries with hot climates are taken into account. The possibility of reducing the high cost of products and structures for enterprises of the oil refining complex due to a significant reduction in the thickness of products is shown. This made it possible to introduce optimal compositions at Russian and Iraqi construction sites.
H.G.H. AL-SURRAYVI, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.),
M.A. GONCHAROVA, Doctor of Sciences (Engineering), (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.G. ZAEVA, Engineer

Lipetsk State Technical University (30, Moskovskaya Street, Lipetsk, 398055, Russian Federation)

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For citation: Al-Surrayvi H.G.H, Goncharova M.A., Zaeva A.G. Synthesis of composites on the basis of local raw materials under the influence of aggressive environment. Stroitel’nye Materialy [Construction Materials]. 2021. No. 5, pp. 69–74. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2021-791-5-69-74


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