Creep and Long-Time Strength of Compression Elements from Foam Concrete

Abstract

In this article discusses the mechanical properties of foam concrete, which submitted based on the experimental data of long force resistance and deformation of compression elements from foam concrete. Also submitted criterion range of strength and deformation characteristics of foam concrete different structural modification with taking into account the permanently acting load, which necessary for calculation and design structures of buildings. In article such characteristics of foam concrete as durability and deformability at the age of 28 days by results of short-term tests and also influence of average density and a type of structure on its durability and deformability are considered. Change of mechanical properties of foam concrete in time by results of short-term tests is analyzed and studied. Experimental and theoretical researches which have in turn allowed to recommend for rationing of value of settlement characteristics the foam of concrete taking into account their variability, aging and duration of action of loading are executed.

Creep of Foam Concrete from the Position of the Hereditary Theory of Aging

“…When analyzing experimental creep specific strain curves at different relative stress levels, it was found that up to relative stress levels of 0,60 and 0,45 Rbm, respectively for fine-grained and micrograined foam concrete, creep deformations develop linearly [16,17]. At higher stresses, the dependence of creep deformations of foam concrete on compression stresses is non-linear.…”

Strain-Stress Distribution of Structural Components from Foam Concrete for Monolithic Construction

“…Deformations of creep of foam concrete depend on age by the time of loadcase, decreasing at increase in the last. It is established that the theory of elastic and creeping body fairly describes processes of creep and after-effect of foam concrete [14]. Analytical processing of results of experimental data will be coordinated with the models of the theory of elastic and creeping body offered by S.V.…”

“…Studying of deformations of creep was carried out with the broad range of voltage levels of compression that gave the chance to reveal full picture of deformation of foam concrete. The testing procedure of compressed elements is lit in works [13][14]. The technique of testing of beams for bend the loading enclosed in 1/3 flights from support with the scheme of installation of devices and sticking-up of tensoresistors for measurement of deformations, is given in work [15].…”

Discrete Model of Housing Construction in the Russian Federation

“…Сегодня разделение несущих и теплоизолирующих функций строительных материалов в конструкциях зданий является основой концепции теплоэффективного здания и повышения уровня его тепловой защиты [1][2][3][4][5]. Принимая это во внимание, в последнее время значительно возросла роль ячеистых газо-и пенобетонов, которые находят все более широкое и комплексное применение, не только как теплоизоляционный, но и как эффективный конструкционный материал для несущих конструкций зданий [6][7][8][9][10][11][12][13][14].…”