Influence of Variable Stress State of Concrete on its Frost Resistance

Karpenko, N. I.; YARMAKOVSKY, V.N.; KADIEV, D.Z.

doi:10.4028/www.scientific.net/msf.945.169

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Te pore network of the cement paste provides a matrix for the passage of fuid into the concrete, the development of which depends on a number of factors, including the properties and composition of the concrete constituents, the initial conditions of sealing, and its duration. Temperature, curing time, and humidity are key factors suitable for pore structure [13,14]. When pozzolanic materials are used as part of cement in concrete, the effectiveness of the initial treatment becomes more important.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Feasibility of Using Concrete Containing Waste Paper Sludge Ash and Pozzolanic Materials to Repair Bridge Stub Columns

Delaram

Mohammadi

Adlparvar

2023

Advances in Civil Engineering

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In most cases, the bridge columns are underwater, and there is a risk of corrosion. The columns of marine structures and docks also include such problems. In addition to the problem of environmental hazards, the bridge columns may fail due to design problems or increasing needs. The use of waterproof concrete materials as a jacket can have a role in increasing the life of bridges. Studies in recent years show that some waste from paper industries can be used in the construction industry. In the present study, several concrete stub columns were built as bridge columns and retrofitted with concrete jackets containing waste paper sludge ash, silica nanoparticles, aluminium oxide nanoparticles, and acrylic resin. The variables included the geometric shape of the column (square and circular) and the type of nanoparticles used in the jackets (silica and aluminium oxide nanoparticles), and the curing environment of the columns (normal and sulfate environments). The combined use of nanomaterials and waste paper ash is the most important novelty of the present study. The axial loading test was performed on the columns, and the load-deflection diagrams were obtained. The ductility, stiffness, load-bearing capacity, and crack distribution were among the parameters that were used to compare different modes. The proposed jackets increased the carrying capacity by 10 to 38%, depending on the processing curing environment and the type of nanoparticles. The combined use of aluminium oxide nanoparticles and waste paper ash can improve compressive, tensile, and flexural strengths and increase the axial load capacity of bridge columns. The proposed concrete jacket effectively reduces the corrosion of concrete and steel reinforcement and improves the bridge’s useful life.

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Section: Introductionmentioning

confidence: 99%

Investigating the Feasibility of Using Concrete Containing Waste Paper Sludge Ash and Pozzolanic Materials to Repair Bridge Stub Columns

Delaram

Mohammadi

Adlparvar

2023

Advances in Civil Engineering

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“…Methods of fracture mechanics taking into account into account the process of destruction and the state of the structure of solids are used in the study the durability, long-term strength, deformability of concrete [1][2][3][4][5]. When calculating the strength of concrete and reinforced concrete structures, it is necessary to take into account the work of structures under conditions of repeatedlyrepeated loading, after a temperature exposure or continuous load [6].…”

Section: Introductionmentioning

confidence: 99%

Fracture Mechanics when Studying the Long-Term Strength of Concrete

Shubin

Dorkin

Sultygova

2019

MSF

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The results of experimental and theoretical studies of the process of destruction of concrete by the methods of fracture mechanics are considered. Results of studies of long-term strength, durability and deformability of concrete subjected to a preliminary short-term temperature action up to 300° C and 400° C under load and without load are presented. It is shown that after short-term heating up to 300о С the long-term strength of concrete decreases insignificantly. It is established that heating up to 400° C can be considered the boundary of the structural integrity of concrete. The conditions for using the results of these studies in determining the values of a function that characterizes the change in the long-term strength of a material in the mechanics of heterogeneous structures are formulated. The function of the material destruction measure is introduced to describe the nature of the structural changes in the material at a given constant continuous load, and its change for different levels of a continuous load is considered.

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Determination of the Viscosity Modulus of Concrete Under Static-Dynamic Loading Regimes

Fedorova

Medyankin

et al. 2022

International Scientific Siberian Transport Forum TransSiberia - 2021

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Influence of Variable Stress State of Concrete on its Frost Resistance

Cited by 3 publications

References 4 publications

Investigating the Feasibility of Using Concrete Containing Waste Paper Sludge Ash and Pozzolanic Materials to Repair Bridge Stub Columns

Investigating the Feasibility of Using Concrete Containing Waste Paper Sludge Ash and Pozzolanic Materials to Repair Bridge Stub Columns

Fracture Mechanics when Studying the Long-Term Strength of Concrete

Determination of the Viscosity Modulus of Concrete Under Static-Dynamic Loading Regimes

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