Nature raw materials of Russian Primorsky Krai for concrete

Fediuk, Roman; Yevdokimova, Yu G.; Smoliakov, A K; Timokhin, Roman; Stoyushko, N Yu; Batarshin, V.O.

doi:10.1088/1755-1315/87/5/052005

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…The aggregates used in the construction field come from the processing of natural deposits geologically called conglomerates, consolidated sedimentary deposits consisting of a preponderant content of more or less rounded pebbles and gravels [ 20 , 21 ]. The alluvial conglomerates available for the Italian aggregate market have a strong lithological diversity as most are made up of well-rounded river pebbles or conglomerates whose composition substantially reflects the type of outcrops in the catchment basin [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Petrographic and Physical-Mechanical Investigation of Natural Aggregates for Concrete Mixtures

2021

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The availability of different lithology with which concrete can be packaged could create substantial questions on the differences that they can provide to the same mixture. Different kinds of aggregates were analyzed individually to investigate their main characteristics, which allowed us to package five types of concrete mixtures. These five mixtures were compared to each other through compressive strength values. Furthermore, it was considered microscopically what possible differences could exist between these different mixtures, for example, differences in the cement/aggregate reaction. The chemical characterization of the aggregates, used as the skeleton of the cement mixes, was proposed as an important investigative phase in order to better understand the differences in the geotechnical and physical-mechanical characteristics and to verify the presence of any harmful phases for the durability of the concrete.

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Section: Introductionmentioning

confidence: 99%

Petrographic and Physical-Mechanical Investigation of Natural Aggregates for Concrete Mixtures

2021

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“…This leads to pitting of granular foamed polystyrene from the concrete with the accompanying decrease in strength, crack resistance, frost resistance, and PSC environmental safety [1,2]. A general review of the researches performed shows that the most effective way to create durable adhesive bonds in the system "granular foamed polystyrene -cement stone" refers to the cement stone structuring of chemically related organic micro-and nanomodifiers [3,4] on the basis of natural and technogenic raw materials [5][6][7][8], contributing to the formation of adsorption of the intermediate layers in the contact area of hydrophobic foam with the hydrophilic products of hydration of clinker minerals [9], at the disperse reinforcement of concrete macro-, micro-and nanofibers [10]. The concept of multi-level dispersed reinforcement is accompanied by a synergistic effect of the reinforcing elements at each large-scale structural level of concrete, which increases the resistance of concrete to brittle fracture [11].…”

Section: Introductionmentioning

confidence: 99%

Disperse-Reinforced Polystyrene Concrete Modified by Silica-Containing Additive

Pykin

Лукутцова

Golovin

2020

MSF

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The composition of disperse-reinforced polystyrene concrete for the manufacture of small-pieces load-bearing structural insulating wall products is developed. Its properties and microstructure are studied. It is composed of Portland cement, granular foamed polystyrene, basalt fibre, water and silica-containing modifier obtained by mixing condensed silica, superplasticizer S-3 and an aqueous solution of sodium water glass. The developed disperse-reinforced polystyrene concrete modified by silica-containing additive is characterized by higher values of adhesive strength (0.231 MPa), class by bending tension strength (Btb4), class by compressive strength (B5), cracking resistance coefficient (0.77), grade by frost-resistance (F1150) with a slight increase in the average density and thermal conductivity coefficient. The increase of physical and mechanical properties and frost resistance of polystyrene concrete of the developed composition is achieved by compaction and hardening of cement stone, improving its adhesion to granular foamed polystyrene due to the synergistic effect of a silica-containing modifier acting as an adhesive and structure-forming additive, and basalt fibre as a disperse-reinforcing component.

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Fine-Grained High-Strength Concrete

Lukutsova

Soboleva

Golovin

et al. 2019

MSF

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The factors determining the production of fine-grained high-strength concrete are considered. The effect of micro-and complex nanodisperse additives based on natural mineral components, as well as the packing density of the quartz aggregate, on the strength parameters of fine-grained concrete is studied. The compositions of the fine-grained concrete modified by micro-and complex nanodisperse additives have been developed. The dependence of the fine concrete strength on the ratio of the mineral component and the stabilizer in the nanodisperse additive and the time of ultrasonic dispersion and additive storage is analyzed. The stabilization mechanisms of water dispersions of complex nanodisperse additives by various surface active modifiers are considered. The positive role of ultrasonic dispersion in obtaining nanodispersed additives is shown. The application efficiency of the micro-filler improving the density and strength of fine-grained concrete is revealed. The structure of fine-grained concrete is studied. It has been established by scanning electron microscopy that the introduction of the micro-and nanodispersed additives in the concrete leads to a less defective crystalline structure of the material.

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Nature raw materials of Russian Primorsky Krai for concrete

Cited by 6 publications

References 15 publications

Petrographic and Physical-Mechanical Investigation of Natural Aggregates for Concrete Mixtures

Petrographic and Physical-Mechanical Investigation of Natural Aggregates for Concrete Mixtures

Disperse-Reinforced Polystyrene Concrete Modified by Silica-Containing Additive

Fine-Grained High-Strength Concrete

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