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The crack resistance of reinforced concrete structures

В запланированный процесс обследования железобетонных конструкций на прочность входит исследование трещиностойкости. Таким образом, у строителей имеется возможность выявить способность исследуемого материала сопротивляться различным внешним и внутренним факторам. Данный показатель обозначается определенным количеством времени, исчисляющимся до появления первых трещин. Поэтому, чем дольше конструкция сохраняет целостность, тем трещиностойкость материала считается выше. Увеличение роста трещины происходит тогда, когда фактор напряженности значительно превосходит доступные пороговые значения материала.

Точную оценку этого показателя может гарантировать только экспертиза образцов бетона. Являясь самым эффективным способом исследований на данный момент, она верно прогнозирует устойчивость конструкции в будущем.

Факторы, влияющие на трещиностойкость бетона

Появление и развитие мелких повреждений в бетоне могут спровоцировать внешние причины – влажность и температура, а также свойства самого сырья. При обозначении трещиностойкости принимаются во внимание данные о качестве материала, упругости, ползучести, усадки и прочее. Также не последнюю роль при этом играют конструкционные формы и размеры самого строения.

Кроме этого, стоит принять во внимание и технологию изготовления цемента. Материал, обладающий небольшой скоростью затвердевания, гораздо реже способствует появлению трещин. Именно поэтому вопрос, касающийся определения трещиностойкости, является по большому счету комплексным, требующим многостороннего процесса исследования.

Способы повышения трещиностойкости бетона

Достаточно опасным признаком является появление даже минимальных трещин на бетонных конструкциях. Мелкие разрушения могут привести к осыпанию цемента и оголению арматуры. Как следствие этого, появляется коррозия, которая провоцирует дальнейшие разрушения. Сделать бетон прочнее можно, применяя следующие методы:

- добавление в смесь особых добавок укрепляющего характера;
- омагничивание воды;
- пересмотр состава бетона;
- железнение поверхности
– создание специального защитного слоя, который не дает появляться мелким трещинам;
- формирование наиболее подходящей для определенного случая структуры бетона.

Главной задачей при выборе оптимального состава является способность найти необходимое соотношение компонентов, благодаря чему бетонная конструкция будет максимально прочной.

Если же трещина все же появилась

Прежде, чем приступать к ремонту бетонных конструкций, следует определить причину появления трещин. Сами же восстановительные работы можно разделить на два типа:

- ремонт и устранение конструкционных недостатков;
- возведение новых конструкций, полноценно заменяющих поврежденные.

Следует отметить, что в данном случае наиболее оптимальным способом устранения трещин является метод инъекцирования. В проблемную зону под давлением нагнетают специальный раствор. Если нужно восстановить защитный слой, то тогда применяется метод торкерирования. В данном случае заранее готовится специальная строительная смесь, которая наносится под давлением на подготовленную поверхность.

Если же неполадки возникают в результате дефектов грунта, то в этом случае необходимо как можно быстрее решать эту проблему, усилив или стабилизировав основание.

Специалисты компании Граундтек обладают всем необходимым для анализа, ремонта и восстановления бетонных конструкций. Обращаясь к нам за помощью, каждый заказчик может рассчитывать на качественное устранение всех проблем.Проекты компании посмотреть здесь 

Published: June 13, 2019 by author Groundtek

20 сomments

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Rusanova Oksana· July 18, 2021

What if there are doubts as reinforcement?How to understand it is qualitative or not?

1 thumb_up

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Aleksandr Sinchenko (inzhener GROUNDTEK) July 18, 2021

To answer this question, a group of specialists of surveyers and designers is involved.Concrete samples are taken in safe places and selectively concludes the quality of reinforcement in comparison with the design calculations of an independent project organization.After the conclusions, the development and decision-making is already underway, if necessary, further work to correct the situation.

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Fomina Alla· Sept. 14, 2020

Hello, would like to clarify, this material can be injected into the cracks themselves in the disturbed brickwork?

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Aleksandr Efimchik (inzhener GROUNDTEK) Sept. 14, 2020

You can, if the laying is in the ground.This is a separate technology with a phase of attracting a narrowly specialized laboratory for examining the design itself and its suitability to the perception of potential loads.Also, for this technology, the materials are strictly selected and the project is developed on its methods.

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Starikova Natalija· Dec. 13, 2021

Greetings!I think that I have no problems with the quality of concrete or reinforcement as the house has been worth 20 years, and cracks appear (((the soil is good, circle of sand. What other options are there?

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Aleksandr Efimchik (inzhener GROUNDTEK) Dec. 13, 2021

No matter how well there are cracks, this is an objective circumstance indicating that there is a problem.To begin with, it is worth conducting an audit and inspection of the building.By the nature of cracks, their history and dynamics can be determined which work on the survey should be included in the complex.After that, choose a technical solution and make a choice for yourself to weighing everything and against.

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Sofronov Pavel· Dec. 19, 2020

Good day!And how to identify cracks appear because of the problem with the soil or because of the poor quality of concrete?

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Aleksandr Sinchenko (inzhener GROUNDTEK) Dec. 19, 2020

The problem may appear not only at "or", but also with "and".That is, problems can be with the base and with the material from which the supporting structures are made.Therefore, it is necessary to examine the base and the designs themselves and after obtaining the results determine the cause and eliminate it with the most effective solution.

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Okulov Jaroslav· Oct. 18, 2019

How to understand the crack carries danger to the design or is it just damage to brickwork?

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Aleksandr Efimchik (inzhener GROUNDTEK) Oct. 18, 2019

Brick masonry damage is already "not easy."The cause of cracks is found when analyzing the data after the instrumental examination of the structures and the base.

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Terent'eva Olesja· Dec. 28, 2021

And what do you know about the carbon canvas?Is it possible to save concrete?

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Aleksandr Efimchik (inzhener GROUNDTEK) Dec. 28, 2021

Theoretically, it is possible, however, in practice, it is necessary to carry out a very qualitative procedure for fastening the canvas to the concrete surface, because the smallest error may have catastrophic consequences.

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Artamonov Boris· Dec. 24, 2020

Do you always need to make any measures, when the appearance of minor cracks?

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Aleksandr Efimchik (inzhener GROUNDTEK) Dec. 24, 2020

Measure number one - observation and fixation of changes, measure number two - conducting a survey.These two measures should be enough to decide to move on or not in this necessity.

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Dolgov Vitalij· Dec. 28, 2019

Is there a grained materials that work with a surface layer of concrete?

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Aleksandr Sinchenko (inzhener GROUNDTEK) Dec. 28, 2019

Unfortunately no.Grained materials have a narrow and deep specialization.To work with the "concrete surface" there are other materials and brands.Although it also has its own specialization and you need to be concrete in the formulation of the problem for the material.

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Gerasimova Marija· Nov. 17, 2019

Is it worth worrying because of small cracks on the foundation of a wooden house? The house stands, doors and windows open, except aesthetics, other problems have not yet been found.

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Aleksandr Sinchenko (inzhener GROUNDTEK) Nov. 17, 2019

It is worth not worrying, but to organize the observation of the development of cracks.If there is no development in time, it is not worth worrying, and watching your asset regularly throughout his life.

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Lavrent'ev Pavel· Dec. 20, 2019

Is it possible to independently determine the reason for the appearance of cracks?

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Evgenij Novitskij (inzhener GROUNDTEK) Dec. 20, 2019

Theoretically, with the presence of special education and tools, of course, you can do it yourself.

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Evdokimov Anatolij· June 14, 2021

Hello, I would like to clarify whether high-quality reinforcement would save from cracking?I would also like to hear an authoritative opinion on composite reinforcement.

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Aleksandr Efimchik (inzhener GROUNDTEK) June 14, 2021

The most important thing is to comply with construction work production at all stages.From searching for a plot to commissioning the object.One reinforcement, no matter how strong it is, the question of cracks does not solve

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Andrianova Milana· June 21, 2019

Good afternoon, once again I am convinced that if you initially think and make it right and technology, this will save in the future from many serious problems!

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Evgenij Novitskij (inzhener GROUNDTEK) June 21, 2019

Absolutely faithful conclusion, but it is beautiful in theory.Real life carries in itself uncertainties from which alas almost can not get rid of

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Rjabova Zhanna· Nov. 14, 2020

What guarantee on your work?Is there a warranty that cracks will not go further?

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Aleksandr Efimchik (inzhener GROUNDTEK) Nov. 14, 2020

Yes, such a warranty is provided to choose a client.There is a list of warranty points to choose a client, including its period

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Gladkov Leonid· Nov. 18, 2021

When the concrete crumble, is this the same topic?

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Evgenij Novitskij (inzhener GROUNDTEK) Nov. 18, 2021

Alas no, the discrete crack and the destruction of concrete is different topics.If concrete cropping occurs, the repair measures will drastically differ from the fight against single cracks in structures

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Blinova Alena· Nov. 15, 2020

Are you filling cracks yourself?

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Aleksandr Efimchik (inzhener GROUNDTEK) Nov. 15, 2020

We can themselves.You choose the project implementation conditions

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Filimonova Zhanna· Aug. 14, 2019

And if the zip (traces of salt, are white) go along concrete?You can help?Or is it not scary?

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Aleksandr Sinchenko (inzhener GROUNDTEK) Aug. 14, 2019

Unfortunately, in these cases, the question of the operating conditions and the quality of the most building material, from which the carrier construction is made

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Schukin Vitalij· Dec. 18, 2021

Tell me, is it possible to use your material instead of concrete?Foundation to fill out of it?

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Aleksandr Sinchenko (inzhener GROUNDTEK) Dec. 18, 2021

Unfortunately no.The principle of use of our materials and concrete is completely different.It will even be correct to even say that these materials are not comparable in the matter of construction.

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Bychkov Jaroslav· Sept. 24, 2020

Do you work in the subway?

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Aleksandr Sinchenko (inzhener GROUNDTEK) Sept. 24, 2020

We can work in the subway.Question about the tasks facing us

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Chernjaev Boris· Aug. 21, 2019

Do you attracted a construction expertise to determine the problem at the facility?

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Aleksandr Sinchenko (inzhener GROUNDTEK) Aug. 21, 2019

If there is such a need or is posed in this way the task, then, of course, yes

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Dorofeev Miron· Aug. 22, 2021

And in color somehow you can determine the characteristics of concrete?After all, you are not always present at the kneading ...

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Aleksej Karpovich (inzhener GROUNDTEK) Aug. 22, 2021

Previously, it was possible to identify the problem so much, and now you can add dyes into the mixture and this option disappears

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