Strength characteristics of aerated concrete with fly ash filler from Angren Thermal Power Plant

Abstract

This article focuses on fly ash aerated concrete, a new and very useful material in the construction industry and is basically a suspension of cement mortar with a maximum content of aluminum powder of 0.2 % by volume. A description of the conducted experimental study on the effect of the complete replacement of river sand with fly ash for various mixtures is given, and compressive strength indicators are also given.

Comparison of the results of applying the turbulence model VT−92 and two-fluid model to the problem of a subsonic axisymmetric jet

“…Therefore, developing a numerical algorithm that does not require large computing resources is an urgent task. To numerically study the problem posed, a system of equations is used: the Reynolds-averaged Navier-Stokes equations in a cylindrical coordinate system [15][16][17][18][19][20][21][22][23][24]. For numerical implementation, the system of equations ( 1) and ( 2) was reduced to a dimensionless form by relating all velocities to the average flow velocity of the jet at the nozzle exit , and the linear dimensions to the nozzle radius r. The study was carried out for a jet with a Reynolds number 𝑅𝑒 = 5600 to obtain a stationary solution to systems of equations (2), the establishment method was used.…”

Numerical study of particle motion in a two-dimensional channel with complex geometry

“…From this analysis we can conclude that the models of Spalart and Allmaras [8], and Menter k−ω SST [9][10][11] have the highest ratings. To date, these models have been used to obtain numerical solutions to many important practical problems [12][13][14].…”

“…Therefore, it will take some time to use them in solving engineering problems. The so-called hybrid RANS/LES methods, which are called detached eddy methods (DES) [14], have received good development. The essence of this method is that near solid surfaces, where high resolution of computational cells is required, the RANS model is used, and far from the walls the LES method is used.…”

Research of physical-mechanical and physical-chemical properties of expanded direction concrete with complex polymer - mineral additive of a new generation based on local raw materials

“…The addition of TPP fly ash as an additive or filler when preparing concrete mixtures helps to increase the strength of concrete. Today, effective results are obtained by preparing aerated concrete by adding up to 50% fly ash to the composition of the total dry mixture [2].…”