Aerated concrete with predetermined pore parameters for the exterior walls of energy efficient buildings

Adilkhodjaev, Anvar; Hasanov, Bahriddin; Shaumarov, Said; Kondrashchenko, Valery

doi:10.1088/1757-899x/1030/1/012006

Cited by 23 publications

(16 citation statements)

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“…The widespread introduction of this method requires a comprehensive study of the technological process of asymmetric rolling and metallographic research. It is important to study the effect of high-speed asymmetry modes on the structure and mechanical properties of the metal being processed [19][20][21][22][23][24][25][26][27][28][29][30]. In the section materials and research methods, research methods and the tested aluminum alloy are given in more detail.…”

Section:  Cos Fmentioning

confidence: 99%

Crystallographic structural changes of Al1050 under different types of sheet metal rolling

Saydakhmedov

Bakhadirov

2021

E3S Web Conf.

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AA1050 aluminum alloy was studied with symmetric and asymmetric rolling in various technological modes of rolling equipment. The rotational speeds of the rolls and the number of passes varied according to the initially foreseen scheme. Rolling of aluminum sheet alloy was carried out on an experimental - laboratory installation. The crystallographic texture before and after rolling was investigated using X-ray diffraction. X-ray analysis data was processed using MTEX MATLAB toolbox 75. The pole figures and the texture of the samples of aluminum alloy on the Euler space are given. It was shown that pole figures obtained based on X-ray analysis of samples, rolled by the traditional way, had orthorhombic symmetry, and the sample texture had typical components of traditional rolling, like Cu (copper), Su (with lower intensity) B (Brass).

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Section:  Cos Fmentioning

confidence: 99%

Crystallographic structural changes of Al1050 under different types of sheet metal rolling

Saydakhmedov

Bakhadirov

2021

E3S Web Conf.

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“…Therefore they require further development and experimental verification. The research results show [1][2][3][4], [9][10][11][12][13][14] that the failure of concrete under triaxial proportional compression (the axial pressure plus lateral hydrostatic pressure) can be of various character, i.e. to be basically of tensile or shear mode depending on the intensity of lateral pressure.…”

Section: Introductionmentioning

confidence: 99%

Assessment of strength and deformation of lightweight concrete and its components under triaxial compression, taking into account the macrostructure of the material

2021

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The paper presents the results of experimental studies on the strength and deformations of lightweight concrete, mortar matrix and hardened cement paste under triaxial compression. Tests on samples were carried out using short-term triaxial proportional σ1 > σ2 = σ3 loading (i.e. axial compression + lateral hydrostatic pressure). During the loading, the ratio of the main stresses (both axial and lateral) was kept constant up to the end of tests. The experimental studies were carried out for different low ratios of σ2/σ1. A theoretical estimation has been discussed to approximate experimental results and prediction of triaxial strength values for different types of lightweight concrete. An estimation of the confining pressure parameter K has been done for the used mode of loading.

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“…The production of high-strength concrete by vibration-impact pressing is achieved by densely filling the intergranular space with cement paste and mortar with a simultaneous displacement of air bubbles, squeezing out part of the free water behind the portions of the compacted mixture [13][14][15][16][17][18][19]. In case of an unsuccessful selection of the composition of the concrete mixture, a rigid, practically incompressible frame of aggregate grains can form [20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Compressive strength properties of hyper-compacted concrete

2021

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The most important property of a concrete mix is concrete workability, i.e., the ability of the mixture to spread and take a given form while maintaining solidity and uniformity. The main influence on the workability of the concrete mixture is exerted by water consumption and, in part, cement consumption. Workability is determined by the mobility of the concrete mixture at the time of filling the mold and plasticity, i.e., the ability to deform without breaking the continuity. In the process of vibrating and pressing the concrete mixture placed in the mold, the total volume of the mixture changes until the pressure is balanced by the resistance forces. Deformation of concrete mix or, more precisely, freshly laid concrete with any compaction methods, including vibration compaction, is divided into elastic (reversible) and residual (irreversible). Residual deformations during vibration compaction occur as a result of water squeezing out and redistribution of aggregate fractions. Permanent deformation is part of the total. Its value at the same composition of the concrete mixture depends on the shape and size of the pressed sample. At the same time, it is noteworthy that after reaching a certain pressure, only elastic deformations will be characteristic of the freshly laid concrete mixture. So, A.D. Nikitin, in the course of the experiments, found that at a pressure of 2.2 MPa, the elastic moduli of the components of the concrete mixture have the following values: for cement paste - 0.16 · 104 MPa, aggregate - 4.5 · 104 MPa and air - 3 MPa ... After reaching a static pressure of 2.2 MPa, the compressible mixture showed only elastic deformation. This indicates that by the time the specified pressure was reached, the relative movement of the aggregates had ended, i.e., they are located most compactly.

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Aerated concrete with predetermined pore parameters for the exterior walls of energy efficient buildings

Cited by 23 publications

References 0 publications

Crystallographic structural changes of Al1050 under different types of sheet metal rolling

Crystallographic structural changes of Al1050 under different types of sheet metal rolling

Assessment of strength and deformation of lightweight concrete and its components under triaxial compression, taking into account the macrostructure of the material

Compressive strength properties of hyper-compacted concrete

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