INVESTIGATION OF PHYSICO-MECHANICAL PROPERTIES OF COARSE-PORED EXPANDED CLAY CONCRETE FOR THREE-LAYER 3D ADDITIVE CONSTRUCTIO

Author:

Sheremet A.1,Elistratkin M.1,Sheremet E.1,Lesovik V.1,Shatalova S.1

Affiliation:

1. Belgorod State Technological University named after V.G. Shukhov

Abstract

The article considers the solution of the urgent problem of the development of 3D additive technologies in Russia by creating a new model of the forming device and the development of composite materials. The purpose of this work is to study the physical, technological and thermal properties of coarse-pored expanded clay concrete. The required characteristics are determined by standard methods and requirements of regulatory documents, including modern physico-chemical methods of analysis and a wide range of modern and original research methods corresponding to modern scientific knowledge. Results. Compositions of coarse-porous expanded clay concrete with compressive strength up to 9.2 MPa, water absorption up to 25% by weight and shrinkage deformations in the range of 0.1...0.3 mm/m were obtained. To simulate the behavior of the studied systems, a two-factor three-level experiment was conducted for each type of mixture of coarse-pored expanded clay concrete, which allowed us to obtain regression equations characterizing the relationship of variable parameters with certain properties of the system. It was revealed that the value of the average density is most affected by the specific consumption of the binder. While the strength depends most on the I/O ratio. Moreover, in this case, the amount of water is less related to the porosity of the cement stone itself, and more to the consistency and stickiness of the resulting glue, its ability to evenly cover the filler particles. It is established that rationally selected compositions of structural and thermal insulation KPKB for the internal filling of a three-layer "printed" wall, homologation and thermal insulation will ensure the formation of the required technical and operational indicators.

Publisher

BSTU named after V.G. Shukhov

Subject

Psychiatry and Mental health,Neuropsychology and Physiological Psychology

Reference24 articles.

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