The Influence of Low-hard Dispersed Additives on Impact Strength of Concrete

Abstract

The article presents the results of experiments on the use dispersed components with reduced stiffness in concrete mixtures to assess their influence on the dynamic strength of concrete. A crushed ceramic bricks, the polystyrene foam, cellular glass and expanded clay sand were used components with reduced stiffness. Samples-cubes were subjected to various dynamic loads, and then measured their strength and were compared with the results obtained for a control sample. Furthermore by vertical dynamic koper were measured impact strength of the obtained compositions. The results of experimental studies are showing the possibility of increasing the impact strength of concrete by introducing into the concrete mix an additive with reduced stiffness. In the same time there is some reduction in other properties of the resulting concrete. Has been defined the optimum additive and its amount to use in the concrete that subjected to dynamic loads.

Technological Properties of Self-Compacting Concrete Mixtures with Ground Quartz Sand

“…As it can be seen from the grain composition of Table 1 and the test results of concrete mixtures, even a slight change in the composition of the fine fraction of less 0.01 mm can lead to significant changes in the technological properties of SCC. The results obtained are consistent with the data on the influence of grain composition of mineral additives and aggregates on the rheological properties of mixtures [36][37][38][39][40][41][42]. This can be used for the development of construction technologies [43][44][45][46][47][48].…”

Structure formation of construction materials modified with natural and man-made nanoadditives

“…Over the past decade, the number of theoretical and experimental researches devoted to modification of building composites with dispersed additives to increase certain physical and technical parameters has increased several times (Kharitonov, Korobkova, & Smirnova, 2015;Reches, 2018). Most of empirical studies are devoted to the selection of effective nanodispersed additives and the development of technological methods for the functionalization of the surface of nanosystems (Muhd Norhasri, Hamidah, & Mohd Fadzil, 2017;Liu, Yu, Liu, Jin, & Liu, 2018).…”

Lime Based Dry Mixes with Carbonate Aggregates

“…This is due to the observance of the principle of historicism in relation to these materials as well as the design features of architectural monumentscultural heritage [1][2][3]. High deformability and vapor permeability of lime-based mortars as well as their good adhesion to the ceramic brick determine the operational reliability of plaster and masonry mortars in the construction and finishing of massive structures of artificial and natural stone [4,5]. The modern practice of restoration is characterized by the active development of the direction of dry mixtures produced in accordance with the requirements for restoration materials the authenticity of the material composition as well as physical and mechanical properties [6].…”