<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The work investigates changes in the beam structure under the action of local freezing, which leads to a change of the mechanical properties of the material and, consequently, of the beam structure. Two types of beam samples were used: from cement-sand mortar and from concrete. The work investigates the change in the development of deformations depending on the conditions of freezing of samples. The second accelerated method for assessing frost resistance was chosen according to DSTU B В.2.7-47-96. An accelerated method was chosen for assessing frost resistance at the temperature of -20 ±2 C°. After every five freeze-thaw cycles, the following changes were monitored: mass, water absorption, ultrasound transmission rate, damage coefficient, tensile bending strength, splitting strength, compressive strength, carbonization depth. The results showed that both in concrete and in mortar samples, the compressive strength after freezing was lower by 8% and 15% accordingly. The experimental results obtained confirm the assumptions made that the frost resistance of the material depends on the conditions of exposure of negative temperatures on products and structures and it can be used in a wider range of construction which will push regional development.</p>
</abstract>

The work investigates changes in the beam structure under the action of local freezing, which leads to a change of the mechanical properties of the material and, consequently, of the beam structure. Two types of beam samples were used: from cement-sand mortar and from concrete. The work investigates the change in the development of deformations depending on the conditions of freezing of samples. The second accelerated method for assessing frost resistance was chosen according to DSTU B В.2.7-47-96. An accelerated method was chosen for assessing frost resistance at the temperature of -20 ±2 C°. After every five freeze-thaw cycles, the following changes were monitored: mass, water absorption, ultrasound transmission rate, damage coefficient, tensile bending strength, splitting strength, compressive strength, carbonization depth. The results showed that both in concrete and in mortar samples, the compressive strength after freezing was lower by 8% and 15% accordingly. The experimental results obtained confirm the assumptions made that the frost resistance of the material depends on the conditions of exposure of negative temperatures on products and structures and it can be used in a wider range of construction which will push regional development.

Frost resistance of cement-sand and concrete beams during unilateral freezing

Croatian Regional Development Journal

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Frost resistance of cement-sand and concrete beams during unilateral freezing"}

The work investigates changes in the beam structure under the action of local freezing, which leads to a change of the mechanical properties of the material...

Frost resistance of cement-sand and concrete beams during unilateral freezing

Publicado en línea: 13 sept 2021

Páginas: 64 - 74

Recibido: 25 ene 2021

Aceptado: 22 feb 2021

DOI: https://doi.org/10.2478/crdj-2021-0009

Palabras clave
cement-sand mortar, concrete, beam, deformations, localized freezing and thawing, material properties, structural changes

© 2021 Nepomyach Alexander Nikolaevich et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Frost resistance of cement-sand and concrete beams during unilateral freezing

Publicado en línea: 13 sept 2021

Páginas: 64 - 74

Recibido: 25 ene 2021

Aceptado: 22 feb 2021

DOI: https://doi.org/10.2478/crdj-2021-0009

Palabras clavecement-sand mortar, concrete, beam, deformations, localized freezing and thawing, material properties, structural changes

© 2021 Nepomyach Alexander Nikolaevich et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Palabras clave
cement-sand mortar, concrete, beam, deformations, localized freezing and thawing, material properties, structural changes