Vol 3, No 13 (2015)
- Year: 2015
- Published: 20.10.2015
- Articles: 10
- URL: https://ogarev-online.ru/2311-2468/issue/view/19001
Full Issue
Mass Transfer in Capillary-Porous Materials
Abstract
The article considers mass transfer in capillary-porous materials in case of simultaneous occurrence of diffusion and phase process. The authors present a number of equations for determining the effective diffusion coefficient, the width of the diffusion field as well as the areas of the cement stone corrosion.
Creating Gradient Coatings with a Set of Properties Providing Resistance to Operational Impacts
Abstract
The article considers the basic principles of calculation of functionally gradient coated composite materials. The authors focus on predicting the properties of a coated composite calculated by the method of functionally gradient materials with the alignment of stress in the layer.
Prefabricated Spherical Shell of Hexagonal Panels
Abstract
The article deals with the problems of constructional and technological forming of spherical shells based on geodetic network. In this connection, several design and technological methods of constructing triangular spherical networks called "Traner" were investigated. The optimal criterion of the methods is the minimum number of standard sizes of structural components and the minimal number of dome components as well as pre-assembly and pre-tension capability.
Alkali Resistance of Epoxy Composites with Advanced Reological Characteristics
Abstract
The article presents the results of experimental studies of elastic-strength characteristics and alkali resistance of epoxy composites in relation to the content of active diluent Etal-1. The authors have revealed the optimal content of Etal-1 that allows obtaining compositions with the required combination of properties.
Fractal Analysis of Deformation Curves of Composite Building Materials under Compression
Abstract
The article considers the algorithm of determining the fractal dimension of deformation curves based on the index of length analysis in order to obtain the integral quantitative estimation of destruction of building composites under compression. The authors compare the method suggested with the algorithms of determining the Hurst exponent and fractal dimension by the method of squares. The study shows the advantage of the method based on determining of the fractal dimension on the index of length of deformation curves.
Optimization of Foam Concrete Composition by Using Diatomite as a Filler
Abstract
The possibility of obtaining foam concretes by using the diatomites of Mordovia Republic as fillers is studied. The technology of production of thermal insulation materials with additives is shown. The authors analyze the porosity structure of the obtained samples and select the optimal composition, considering the characteristics of walling thermal insulation.
The Effects of the Republic of Mordovia's Local Fillers on the Characteristics of Water-Dispersive Paint Coatings
Abstract
The article presents the test results of paint coating compositions based on acrylic binders, containing the local fillers of the Republic of Mordovia – diatomite and dolomite. The study showed the optimal compositions with high values of dry residue and spreading capacity of dried film.