density

The deviation of density and viscosity values of oil mixtures from those calculated according to the additivity rule has been examined. Mathematical models have been developed for determining the properties of mixtures with different compositions taking into account the group composition of the source components. Mixtures containing components with a high content of alkanes and a low content of arenes have been found to be characterized by extreme deviations of density towards the maximum and kinematic viscosity towards the minimum.

The influence of the air-entraining agent (AEA) on a density, the volume of entrained air of mortar mix and compressive strength of hardened mortar was studied in this article. Results show that the addition of AEA results in the reduction of water to cement ratio to provide the targeted flow and the density that depends on the volume of entrained air. The addition of AEA causes the decrease of the density of mortar (C:S=1:2) by 8,2% and the increase of the compressive strength by 13,9% after 28 days of hardening compared to the mortar (C:S=1:2) without AEA.

Determining the physical parameters of geomaterials under high temperature and pressure conditions is necessary in connection with the fundamental issues of geology and geophysics. It is also aimed at solving applied problems, such as establishing relationships between physical parameters and chemical components of rocks under the earthly conditions of temperature and pressure.

The article deals with the workshop Urban Density Lab Vienna, that took place in Vienna in 2016 with the participation of students and professors from the Technical University of Vienna (TUV), the Department of Urban Planning (Stӓdtebau), NU "Lviv Polytechnic" (NULP), the Department of Urban Development and Architectural Design, the University of Los Andes In Bogotá (Universidad de los Andes, Bogotá). Workshop as a part of the design course of urban planning is an effective tool of the intensive designing process.

The article deals with the process of intensification of the urban territory of a historically formed city. The quarters of residential developments of different periods are analyzed and the indicators of density are determined. The urban transformations of a city canvas, which influence the changes in the density indices and their inter-dependence were investigated.

There has been considered a method of determination rocks density on the basis of the processing of the wave field of the acoustic log. The results of the borehole data processing are demonstrated.

The processes of consolidation, deconsolidation, phase transitions and destructions in the terms of internal structures of the Earth аre studied on the base of non-linear theory of deformable solid bodies.  It is shown that the loss of stability of equilibrium state can precede to the processes of deconsolidation, phase transitions and destructions on geometric form change (structural instability).

Mathematical modeling of effective elastic and acoustic properties of granite reservoir rocks that has different pore space structure was done. The acoustic properties of granite porous-cracks reservoir were determined. The algorithm and software for solving the problem of joint inversion of seismic and gravimetric data based on Born’s approximation for the space-time Green's function with meansquare background velocity for the horizontally-layered medium has been developed and tested (on an example of the Prykerch shelf model).

The formula determines the value of the density through the planets integral characteristics, that can be obtained on the basis of observation data.

Density and excess volume of the binary systems of iso-buthylmethacrylate with acetonitryle and benzene have been measured as a function of concentrations at 293 K and
atmospheric pressure by pycnometric method. The values of excessive and partial molar volumes of the components were calculated. The excess volume for the acetonitryle – isobuthylmethacrylate system receives negative values and for
the benzene system – isobuthylmethacrylate – positive values.