Get all the details about Concrete Creeping
Concrete Creeping
Concrete creep can be defined as the deformation of concrete due to continuous loads that cause the material to become elastic over time. The shape of a concrete structure is usually changed by long-term pressure, and the deformation takes place along the direction of the applied load, which occurs as the load is applied. Immediately after removing the constant load, the strain is immediately reduced as a result of the reduction in strain.
The reduction in the strain at the specified age is the same as the diminution in the elastic strain at the same age. Once the concrete has recovered from this quick deterioration of strain, a continuous decrease in strain is observed, which is known as creep recovery.
A linear relationship between concrete creep and stress has been found up to 30 to 40% of its strength. In contrast to other crystalline materials, concrete exhibits a much greater amount of creep than metals in the last stages of yielding before the collapse. Therefore, creep is an important factor to consider in concrete building construction, since it is several times greater than strain under loading.
Various Factors influencing the concrete creeping
The creep of concrete is affected by a number of factors, including:-
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Aggregate's Quality:
Aggregate has a creep rate of less than one percent. Among the factors that influence the creep of concrete is the aggregate since it has the ability to restrain the magnitude of creep. A non-creeping aggregate restrains the creeping of the paste under load so that it is not pushed out by the load. If the aggregate strength is higher, then there is a greater restraining effect and, as a result, there will be less creep as a result of the greater restraining effect.
Concrete Mixture ratio
The quantity and quality of paste material are the two most critical factors that determine creep in the paste. If the proportion of water to cement is too high, then the concrete will develop excessive creeps, which in turn will result in a decrease in strength over time.