The Use of Composite Materials in Reconstruction of Floors of Industrial Buildings

Abstract

the article discusses the relevance of the use of composite materials in the reconstruction of exposed to heavy loads of concrete and reinforced concrete floors of industrial buildings. It is noted that at the present stage of development of the construction industry special attention is paid to the use of steel fibreconcrete, as this material allows with minimal material and labor costs to carry out work on the reconstruction of industrial floors. The novelty of this study is the use as an adhesive between the existing floor, which is to be restored and strengthened, and the newly laid steel-fiber concrete layer of polymer-bitumen composite material with the addition of cement and graphite powder, previously obtained by the authors experimentally. This material with the required thickness is also a structural layer for leveling the surface of the lower layer, reducing friction under the sole of the upper steel-fiber concrete layer and the existing floor. The paper presents the technology of work in the reconstruction. The composition of the steel-fiber concrete layer is adopted on the basis of studies by other authors. Despite the fact that the experiments proved the solidity and strength of the reconstruction of the floor by the developed technology, the article notes that the final characteristics of the proposed floor design and technology can be identified only during operation, which can be the basis for further research on optimizing the thickness of the layers proposed for use of composite materials. For the evaluation of economic efficiency of application of these composite materials in the reconstruction of the concrete floors in the course of the experiment, there are revealed some figures for labor and material costs.

Assessment of the Effect of Modified Additives on the Homogeneity of Aerated Concrete by Laboratory Tests

“…Большее влияние дисперсионные полимерные порошки оказывают на протекание химической реакции С 3 А с водным раствором, в этом случае наблюдается изменение не только скорости протекания процесса, но также изменение фазового состава цементного камня. В процессе растворения С 3 А и C 3 S часть воды связывается в низкоосновные гидроалюминаты и гидросиликаты кальция, и при этом наблюдается частичное удаление воды [14,15]. При последующем повышении концентрации водного раствора наблюдается коагуляция фазы с содержанием дисперсионного полимерного порошка и это способствует образованию мембран между прореагировашими и исходными частицами цемента и заполнителя [16].…”

Los áridos ligeros para los hormigones a base de residuos vegetales

“…Is of some interest the use of polystyrene in the production of polymeric woody materi-als (PWM) from shredded wood -sawdust opened the possibility of obtaining a new type of PWM with new properties, allowed to find a new non-traditional for wood materials binder, and for thermoplastics -non-traditional processing methods and new uses of the resulting ma-terials. The polymeric woody material was impregnated with styrene monomer sawdust with subsequent thermochemical or radiation polymerization in the presence of sawdust and com-bining the finished polystyrene polymer with the sawdust use of its solution, melt or mechani-cal mixing of crushed polymer with sawdust (12,13,14,15) . In order to increase the strength of the building material a method is proposed for the preparation of vegetable raw materials, in this case sawdust, for the production of xylolite.…”

Gamma radiation attenuation characteristics of polyimide composite with WO2

“…The observed negative effects could be moderated by clay nanoparticles. The properties of polymer composites are influenced not only by the type of filler, but also by factors such as the shape of the particles and their sizes, as well as the nature of their interfaces (Arbuzova and Votyakov, 2018;Abramyan et al, 2019).…”