Vol 6, No 9 (2018)
- Year: 2018
- Published: 03.09.2018
- Articles: 10
- URL: https://ogarev-online.ru/2311-2468/issue/view/18452
Full Issue
Forecasting of resource of reinforced monolithic concrete slabs
Abstract
The results of experimental studies of cement composites aged in an aggressive environment are provided. The possibility of using the experimental data to determine the resource of concrete structures is shown. The method of assessment and prediction of building structures durability is suggested. The resource of a sample reinforced monolithic concrete slab is calculated.
Study of reotechnological properties of cement and mineral suspensions for self-compacting concrete mixtures development
Abstract
An analysis of rheotechnological effectiveness of the recipe of cement-mineral suspensions with studying the effect of dosage of different components on the fluidity of disperse systems is carried out. The most effective method of introducing powder of polycarboxylate superplasticizer in the cement system is revealed. The optimal dosage of polycarboxylate superplasticizer and rheology active carbonate filler in cement-mineral suspensions for the development of self-compacting fine-grained concrete mixtures is found out.
Protection of concrete tanks under the conditions of water storage
Abstract
The possibility of using zeolite rocks for coatings of concrete tanks is shown. Chemical analysis of waters of the Republic of Mordovia is carried out. The analysis of the filter sediment shows the results of interaction of water and cement composites filled with zeolite rocks.
The effect of intensity of actinometric parameters on change of decorative characteristics of epoxy composites under climatic action
Abstract
The study results of the changes in the decorative characteristics of epoxy polymers are presented. The dependencies between the change in the colorimetric characteristics and the intensity of solar radiation, ultraviolet A and B, were established. The quantitative influence of various climatic factors on the color characteristics of decorative coatings was assessed. The developed mathematical models are characterized by high coefficients of determination, which allows achieving a high degree of approximation.
Study of physico-mechanical properties and chemical resistance of composites based on plasterless portland cement binders with low water consumption
Abstract
The results of studies of the effect of plasterless Portland cement with a complex additive of lignosulfonate and sodium silicate on the physical and mechanical properties and chemical resistance of composites based on cement binders are provided. The possibility of obtaining composites based on plasterless Portland cement with a complex additive with improved physical and mechanical characteristics is shown.
Optimization of properties of cement compositions based on mineral binders by introducing complex additive "Relamix M2"
Abstract
The production of highly efficient modified materials based on mineral binders is currently very relevant. The study presents the results of improving the basic physico-engineering properties of Portland cement compositions with the introduction of the modifying complex additive "Relamix M2".
Practical implementation of methods for designing external reinforcement of wooden elements based on functionally gradient composite materials
Abstract
The basic principles of the method for calculating functionally gradient composite materials with coating are described. An example of predicting the properties of a carbon fiber-reinforced composite is provided. The predicting is performed by calculating functionally gradient materials considering stress equalization in the interlayer.
Analysis of epoxy polymers microhardness under climatic action
Abstract
The results of studying of epoxy polymeric materials microhardness are presented. The microhardness indicators of the control compounds and samples after 365 days of climatic action were established. The statistical characteristics of the microhardness distribution curves are determined. The effect of climatic factors on the surface layers of the compositional polymer materials was assessed.