water absorption

INCREASING THE VALIDITY OF WALL CONSTRUCTION MATERIALS AFTER REPLACEMENT OF HYDROGENERATED LIQUIDS

The results of the study of water absorption, compressive strength and bending strength, wetting angle of ceramic and cement-sand materials, impregnated with the production of SDP “Kremniypolimer” and developed mixtures of water-soluble liquids are presented in the article. The main hydrophobic materials produced by ZDP “KremnoiPolimer” for obtaining waterproofing liquids are 136-157 M; ETS-32; AKOR-B100. On the basis of GKZH-11N and GKZH-11K experimental waterproofing fluids No. 1 K, No. 2 K, No. 1 H and No. 2 Н were developed.

THE INFLUENCE OF THE POLY(VINYL CHLORIDE) ON THE CHEMICAL STABILITY OF POLYESTER COMPOSITES

The influence of the polymeric modifier – poly(vinyl chloride) on the chemical stability of polyester composites was investigated. From the results of the research, it is found that equilibrium water absorption for polyester composites is established within 7-14 days. Water absorption of unmodified polyester material is about 1,5%.

RESEARCH OF PHYSICAL AND TECHNICAL PROPERTIES OF CERAMIC BRICKS AND ITS HYDROPHOBIC PROTECTION

The current article is focused at the physical and technical properties of ceramic bricks. It was established that the decisive factors in the process of interaction of ceramic bricks with water, water solutions and water vapor is the composition of pore structure and energy state of its surface. It is substantiated and defined the component composition and technological regime of the protective coating formation on the surface of ceramic bricks. The technological properties of the initial composition and physico-mechanical properties of coatings based on them are established.

Protective coatings based filled with polimetylfenilsyloksan to increase corrosion resistance of concrete

The article describes the effects of surface treatment of concrete protective coatings filled of polimetylfynilsyloksan based on its corrosion resistance. The influence of the coating on the adhesive strength, hydrophobicity and water absorption of concrete. The possibility of using the developed formulations of protective coatings to improve durability of concrete is showed, which is operated under conditions of external aggressive factors.

Оцінка ефективності дії захисного покриття на корозійну стійкість бетону

The thesis is devoted to the development of theoretical bases of the corrosion resistance of concrete by protective coatings on the base of polymethylphenylsiloxane filled with aluminum and zinc oxides. The technological properties of protective coatings compositions were investigated by methods of physical and chemical analysis, methods of the concrete surface coating and form conditions were shown. Determined that the forming matric-oxide structure covering in the process of hardening passpasses behind counting polymerization polymethylphenylsiloxane.

Покращення експлуатаційних властивостей керамічної цегли поверхневим модифікуванням поверхні

In the article there are substantiated and determine the optimal composition of protective covering by the mathematical planning method with taking into account the influence of protective covering on water absorption, adhesive strength and frost resistance. It is constituted technologic regime of marking and hardening protective covering on the ceramic matrix surface. It is determined the depth of protective covering penetration and its role in the adhesive contact formation during hardening process and its dependence from ceramic matrix structure.

Polymer-silicate composites with modified minerals

New polymer composites on the basis of epoxy resin and different fine dispersed mineral powders (andesite, bentonite, diatomite, liquid glass and quartz sand) were obtained and their mechanical (ultimate strength), thermal (temperature dependence of the softening) and water absorption properties were investigated. It was established that all properties of these materials were essentially improved, when the same fillers modified by tetraetoxysilane (TEOS) were used.

Water Absorption Behavior and Impact Strength of PVC/Wood Flour Composites

PVC/wood flour composites were prepared by compression molding using sapwood and heartwood from Angelin Pedra as filler. The composites specimens were subjected to water immersion and impact tests. The results showed that the water absorption of all composites increased slightly with increasing immersion time and wood content. However, the values were considerably low compared with control sample, common solid woods and wood plastic composites reported in literature.

Composites on the Basis of Discrete Woven Filler and Polypropylene

Possibility of fabrication by the method of extrusion of composite on the basis of polypropylene and discrete filler in the form of the grinded fabric is studied. Influence on physical-mechanical properties and water absorption of obtained materials for the fillers of various chemical nature - fabrics on the basis of synthetic or/and natural fibers, their filling degree in polypropylene, as well as dependences of these properties on pre-award dressing of filler is estimated.

Polymer Composites on the Basis of Epoxy Resin with Mineral Fillers Modified by Tetraetoxysilane

Ultimate strength, softening temperature, and water absorption of the polymer composites based on epoxy resin (type ED-20) with unmodified and/or modified by tetraethoxysilane (TEOS) minerals diatomite and andesite are described. Comparison of experimental results obtained for investigated composites shows that the ones containing modified filler have better technical parameters mentioned above than composites with unmodified filler at corresponding loading.