Formation of strength and phases of sequence of destruction of arbolite composites at various long loads

Abstract

The article discusses the study of the strength and deformation characteristics of sulfur-containing arbolite composites using secondary resources, which is relevant in regions with a hot and sharply continental climate. This is one of the lightest building materials with low thermal conductivity and good sound insulation ability. The aim of this study is to determine the mechanism of strength formation and the destruction of sulfur-containing arbolite composites under various long-term loads and to substantiate the effectiveness of their use in housing construction. The methodological basis of the study was the current provisions of the theory and practice of creating, developing high-strength concrete concrete based on composite sulfur-containing binders. When conducting scientific research, standard measuring instruments and methods for analyzing the physicomechanical characteristics of arbolite composites obtained using modern methods of X-ray diffraction, differential thermal, microscopic analysis and testing equipment were used. The properties of sulfur-containing arbolite samples were studied at 7, 28, and 90 days old under various conditions and loads. The study of the effect of the resulting deformations on the compression strength of the sulfur-containing arbolyte was based on certain models of concrete structure. The sulfur-containing arbolyte was considered as a two-component system consisting of a fibre of crushed cane and a sulfur-containing solute component, the strength of the solute being variable. Four series of samples from sulfur-containing arbolyte were produced for the study, and a fifth series, for comparison, from sulfur-containing ceramic concrete. Each series consisted of six samples of prisms measuring 150x150x600 mm, three of which (model I) consisted only of a sulfur-containing solute (sulfur-to-pyrite fire ratio of 1:3), and in three other prisms (model II), milled cane fibers of about 18-20 mm diameter were placed in the middle. The prism samples were tested in stages corresponding to a voltage increment of 0.1 to 0.15 MPa, after each load stage the samples were held for five minutes. Readings by indicators (with measurement accuracy of 0.01mm) were taken after application of each load stage and before application of new load. Such a test technique allowed extracting elastic instantaneous deformations and determining the value of the initial modulus of elasticity of sulfur-containing light concrete. It was established that the destruction of sulfur-containing arbolite occurs sequentially, first the destruction of the solution component occurs, and then the organic aggregate. The results can be used in the manufacture of effective wall material for civil buildings, including seismic areas.