Institute of oil and gas problems SB RAS
Author list of organization
List of articles written by the authors of the organization
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INFLUENCE OF THE MODIFIED MINERAL ADDITIVES ON STRENGTH PROPERTIES OF FINE-GRAINED CONCRETE
Description
In the article we have presented the results of research of influence of activated mineral fillers on mechanical properties of fine-grained concrete. It is shown that clay and zeolites in mechanical activated condition have increased both early and estimated durability of concrete
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INFLUENCE OF A WAY OF CRUSHING ON ACTIVITY OF INGREDIENTS OF CONCRETE MIX
Description
The article presents the results of the researches of the influence of a way of crushing on activity of ingredients of concrete mix. It is shown that sand crushing by method of free kick in a planetary mill of AGO-2 allows not only to raise its specific surface, to receive the demanded particle size distribution, but also to improve quality of a surface of particles by removal, destruction of superficial inactive films. On a new surface of sand excess energy concentrates, the active centers are formed and there is a fixing of germs of new growths of products of hydration of cement in a place of an exit of dislocations to surfaces of crystals of sand that leads to substantial increase of chemical activity and reactionary ability of sand
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Description
Experimental data on research of influence of technological parameters on structure and durability at compression of the modified fine-grained concrete are presented in the article. It is shown, that at the optimum maintenance of a mineral additive as a part of the mixed knitting the optimum capillary and porous structure of a cement stone and the increased volume of hydrate new growths is formed. At the raised volume maintenance of an active mineral additive there is a formation of the non-optimal capillary and porous structure of a stone leading to decrease in efficiency of modifying
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STUDY OF POLYMERIC MATERIALS PERFORMANCE IN FRICTION CONDITIONS WITH ICE AND SNOW
Description
The problem of identifying of the most promising polymer materials for sledge sliding application. The comparison of materials is given: the bench tests of polyethylene, fluoroplast, steel and ultra high molecular weight polyethylene (UHMWPE) with different molecular weight and their composites are carried out. On the basis of research of polymeric samples on ice and snow friction in exploiting condition with the use of specially designed sledges was shown that GUR 4150 UHMWPE has the lowest mass volume and linear wear. Also in article the results of research of ice adhesion to different materials are presented. Adhesion research was carried out in low temperature conditions of air from -21oC up to -46oC and in cryocamera according method which was patented by Institute of oil and gas problems of SB RAS. The research showed that GUR 4150 UHMWPE has the lowest adhesion to ice. On the basis of obtained data the authors assumed that GUR 4150 is the most perspective materials for development of sledge sliding exploiting in Arctic conditions.
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RESEARCH OF ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE DISTRIBUTION IN POLYMERELASTOMER COMPOSITE
Description
The research of distribution of polyethylene in production of composites on a basis of butadiene - nitrile rubber and ultra high molecular weight polyethylene is presented in this work. The raised content of polyethylene on the surfaces of samples and products that causes surface effect of modifying and improvement of agressiveproof property and wears resistance is established
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Description
PE2NT11 and chopped carbon fibers and PE2NT11 and modified carbon fibers composites were investigated. It was shown that the mechanical properties depend on the surface characteristics of fibers. It was found that laboratory and tube samples have some difference in mechanical properties that connected with specific distribution of fibers in samples
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MECHANICAL ACTIVATION PROCESSING OF A FILLER FOR FINE-GRAINED CONCRETE QUALITY IMPROVEMENT
Description
The results of research of influence of mechanical activation of filler (river sand) on physical, mechanical and structural properties of fine-grained concrete are presented in the article. The prospects of using mechanical activation technologies for production of concrete with the improved complex of technical characteristics are established
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SAWDUST-СОNCRETE MODIFICATION TO IMPROVE THE PHYSICAL AND MECHANICAL PROPERTIES
Description
The article presents experimental data on the effect of "PFM-NLC" modifying complex additive on basic physical and mechanical properties of modified sawdust соncrete for use in areas with cold climates
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MODIFYING V-14 RUBBER WITH CARBON FIBERS
Description
The influence of carbon fibers and modified carbon fibers on properties of industrially produced V-14 rubber is examined. The dependences of physical and mechanical properties, hardness, abrasion resistance and resistance in aggressive environment on few amount of filled fiber are established. Structural properties of reinforced elastomeric composites are studied by scanning electron microscopy. Elastomeric layer on the surface of modified carbon fiber, confirmed with high adhesion is identified
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PROPERTIES OF THE FINE-GRAINED CONCRETE RECEIVED AT NEGATIVE TEMPERATURES
Description
Researches of fine-grained concrete testify the possibility of using mineral mechanically activated and nano-additives in a complex with the anti-frost additives providing the organization of production of concrete works at negative air temperatures that is especially important for the Arctic regions
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