Informatics Publishing Limited

Larisa Borisovna Svatovskaya ¹, Anastasiya Maksimovna Sychova ¹, Valentina Yakovlevna Soloviova ¹, Ludmila Leonidovna Maslennikova ¹, Maxim Maksimovich Sychov ²

Affiliations
1 Emperor Alexander I St. Petersburg State Transport University (PGUPS), Saint-Petersburg, Russia
2 St. Petersburg State Institute of Technology (Technical University), Saint-Petersburg, Russia

Abstract

Background: Two directions of absorption of silica sol usage for construction are shown. The first direction is the usage of silica sol by means of absorption silica sol solution process and the second is obtaining silica sol according to reaction between clay mineral (Al2O3•4SiO2•2H2O) and H3PO4 solution. Methods: Thermodynamically-based method of research is used to study silica soil properties. In addition, experiments were held to illustrate quality and geoprotection improvement due to absorptive properties of hydrate silicate building materials and products. Findings: First, processes can improve the technical properties of the concrete and, second, can strengthen and detoxicate soil (ground) at the same time. The possibility of silica sol absorption by means of capillary porosity of concrete structure and the change of technical properties of absorbed concrete have been shown. Sand and clayish soil strengthening and detoxication by means of silica soil saturation and obtaining silica soil during the reaction have being revealed as well. The reactions between clay and phosphoric acid have productive silica sol. If there are heavy metal ions in the soil, so it is possible to obtain phosphates and silicates with very low solubility product. Silica sol formation in the soil is very important for lithosphere detoxication not only from heavy metal ions but from oil pollutions as well. Improvements: Such a way is possible due to artificial stone formation to improve technical properties of concrete and to prevent lithosphere toxication.

Keywords

Absorption, Geoecoprotection, Improvement, Phosphates, Properties, Silica Sol, Technical.

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Larisa Borisovna Svatovskaya ¹, Anastasiya Maksimovna Sychova ², Valentina Yakovlevna Soloviova ², Ludmila Leonidovna Maslennikova ², Maxim Maksimovich Sychov ³

Affiliations
1 Emperor Alexander I St. Petersburg State Transport University, Saint-Petersburg, RU
2 Emperor Alexander I St. Petersburg State Transport University, Saint-Petersburg, RU
3 St. Petersburg State Technological Institute (Technical University), Russia, RU

Abstract

Objectives: The objective of this study is to obtain better quality foam concrete. In the process of preparing proteinbased foam the technique of stabilizing foam with colloidal sol solutions is used. Methods: The idea of stabilization implies the following: The interaction at the boundaries between the foam layer phase and the colloidal sol phase becomes possible if silica sol or iron-bearing sol is used. This interaction results in generating the complexes that increase strength of the foam and that of the foam concrete slurry and thus improve the properties of the resulting foam concrete. Findings: The study investigates the parameters that characterize different limitations on manufacturing foam concrete for construction purposes and shows the achieved levels of changing basic structural and technical properties. Besides, the methods of instrumental analysis are used to demonstrate the phase changes occurring in the non-autoclaved foam concrete when stabilized foam is used in the process. The study also shows the possibility to increase the strength of the items made of foam concrete employing the methods of penetration surface treatment with silica sol solution and ironbearing sol solution. Apart from structural and technical properties, the study also considers geoecological protective properties of foam concrete. Applications/Improvements: The results of the study can be used in commercial production of normally cured foam concrete with improved performance characteristics.

Keywords

Colloidal Sol, Foam, Foam Concrete, Geoecological Protective Properties, Stabilization, Silica Sol.

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