05.00.00 Technical science
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INFLUENCE OF THE MODIFIED MINERAL ADDITIVES ON STRENGTH PROPERTIES OF FINE-GRAINED CONCRETE
DescriptionIn 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 OZON-AIR MIX ON THE HARMFUL MICROORGANISMS CONTAINING IN SUBSTRATA
DescriptionArticle is devoted to justification of influence of ozon-air mix at sterilization of vegetable substrata and fodder grain in the course of biotechnological production
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Description
Influence of structure of fibrous plates on durability of thermal isolation is shown. The opportunity of reception durable slabs of higher rigidity on mineral wool of type В (GOST 4640) with the module of acidity up to 1,4 is theoretically proved. The received results can be used in manufacture of plates and by development of new edition of GOST 22950 «Mineral wool slabs of higher rigidity on synthetic bond».
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Description
In this article we have investigated fatty acid composition of oil made of flex seeds of VNIIMK-630 traditional variety and new selected SURPRISE variety. The comparative analysis of composition and factional composition of tocopherol in oil made of these seed varieties has been carried out. We studied changes in acid and peroxidation numbers when flex seeds are stored in the dry condition
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Description
A stress-strain state of landslide soil during interaction with piles has been considered. The dependences of the critical landslide pressures from soil non-squeezing condition have been given. It was established, that account of passive reaction of lower slope essentially increases resistance of construction against soil squeezing
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Description
In this article, the problem of strength of increase of plywood by reducing the internal stresses in the adhe-sive joints during affecting by magnetic field on glues is examined. The proposed model of internal stress formation in wood adhesive joints allows predicting and directionally changing internal stresses in wood joints on glues, treated my magnetic field
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THE EFFECT OF PLANT FOOD ADDITIVES ON THE PROPERTIES OF WHEAT FLOUR AND DOUGH
DescriptionThe article presents data describing composition of macronutrients and food additives "Apple Powder" and food additive "Pumpkin Powder" obtained from secondary resources processing of apples and pumpkins with innovative technology that ensures their high antioxidant activity. Introduction of the studied food additives in wheat flour provides a boost of its antioxidant activity compared to the control (wheat flour without any additives). We have revealed that the introduction of the studied food additives in wheat flour provides a strengthening effect to the gluten flour, while dietary Supplement Powder called "Apple" has a strengthening effect on the gluten of wheat flour compared with a dietary Supplement called "Pumpkin Powder". We proved a positive impact of food additives on the gas-forming ability of wheat flour and water absorption capacity of dough; at he same time, with the same dosage of additives, water absorption capacity of dough with the introduction of additives of "Pumpkin Powder" is higher than this figure with the introduction of the additives of "Apple Powder", due to the higher content of pectin in the additive "Pumpkin Powder " compared with the additive "Apple Powder", having a high water-holding capacity. We have found that the dough with the introduction of the investigated supplements has the best rheological properties in comparison with control samples. The obtained results allow us to develop evidence-based formulation and technological modes of production of bakery products enriched with antioxidant properties, with the use of food additives called " Apple Powder" and "Pumpkin Powder"
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EFFECT OF FLOW OF MUD ON DRILLING PROCESS. THE CASE OF THE NEWTONIAN FLUID
DescriptionPhysical processes, arising up at removing of rock from the backwall of mining hole, are considered. The curve of sedimentation, allowing to determine the rate of climb of transporting of rock at cleaning of back-wall with newtonian liquids – air and water, is shown. The formula is shown out for the calculation of ex-pense of borax solution, necessary for the high-quality cleaning of backwall of mining hole at washing water or air
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Description
The article examines the issues of increasing the efficiency of the system of technical operation of mobile agricultural machinery by means of monitoring the state of units and aggregates of the latter through diagnostics. The problems of complex diagnostics of diesel fuel equipment are investigated. The urgency of diagnosing a fuel injection pump without dismantling from the engine is shown from technical, economic and environmental points of view. The effect of operational malfunctions of some devices of fuel equipment on parameters of its operation as a whole is analyzed. On the basis of the analysis of diagnostic devices application, their grouping is suggested. The parameters to be studied in connection with peculiarities to decide whether it is possible to estimate the technical state of the fuel injection pump without dismantling from the internal combustion engine are indicated. Based on peculiarities of the fuel injection pump technical state estimation, a research program is developed and the results of the research are presented. Specific features of testing the fuel injection pump are indicated. Analysis of the results of the research shows that a smaller error in the change of the cyclic fuel feed rates supplied by the fuel injection sections takes place at the engine speed corresponding to the indicated power. The conclusion is made that the presented research results can be used as a basis for developing a technique (technology) for diagnosing the fuel injection pump without dismantling from the internal combustion engine
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Description
The article presents the results of the study of the effect of different modes and their structure on the amount of furfural and formaldehyde emitted from beech and oak wood. The recommendations on re-ducing of impact of harmful substances on the envi-ronment are given