Nanotechnologies in Construction: A Scientific Internet-Journal

48-63

Authors: Mazitova A.K., Aminova G.K., Maskova A.R., Yagafarova G.G., Mazitov R.M.

The work is devoted to the analysis and development of effective types of plasticizers for a wide range of finishing (linoleum) and insulating building materials (insulation tape, cable plastic) with improved mechanical and technical characteristics. In connection with the growth of consumption of finishing and insulating materials, the development of new formulations of PVC compositions for construction with the use of new plasticizers is not only an urgent task, but also within the framework of construction it allows solving the problems of effective quality control of a finished PVC composition.

97-115

Authors: Rizvanov R.G., Mulikov D.Sh., Karetnikov D.V., Cherepashkin S.E., Shirgazina R.F.

Shell-and-tube heat exchangers are widely applied for implementation of various processes at ventures of fuel and energy complex. Cost of production and reliability of heat exchangers of this type is to a wide extent determined by corresponding characteristics of tube bundle, «tube – tubesheet» is its typical joint in particular when welding operations are used in order to attach tubes to tubesheet in addition to expansion. When manufacturing such equipment of heat-resistant chrome-bearing or chromium-molybdenum steels including steel 15H5M, the process of fixed joint manufacturing gets significantly more complicated and costly due to the necessity to use thermal treatment before, during and after welding (this problem is particularly applicable for manufacturing of large-size equipment). One of the options to exclude thermal treatment from manufacturing process is to use «non-arc» welding methods – laser welding, explosion welding as well as friction welding. Use of each of the welding methods mentioned above during production of heat-exchange equipment has its process challenges and peculiarities.

131-148

Authors: Bekbaev A.A., Agzamov F.A., Khafizov A.R., Lyagov A.V.

Practical aspects of the well construction show that the use of conventional cementing materials do not always provide the necessary level of quality of well casing when the requirements to resources conservation are enhanced. This is true for such complex geological conditions as the alternation of beds with different formation pressures, low fracturing pressure gradients, drilling with ERD etc. The main problems in well casing under these conditions are the losses of cement slurries, low cement top, low-quality formation isolation, and as the result of this – the emergence of cross-flows.