Table of Contents
What are the factors affecting curing of concrete?
The different factors which affect the curing period are,
- Type of the curing method adopted.
- Grade and the type of cement used.
- Atmospheric temperature and climatic conditions.
- Shape and size of the structural member.
- Grade of concrete.
- Type of the structural member and its location ( exposure to the direct sunlight ).
What is curing of concrete and why is it important?
Curing is the process of controlling moisture loss from concrete that has already been placed. Curing ensures hydration of the cement, which in turn enhances it, s strength and durability. Reducing the loss of mixing water from the surface of the concrete.
How does the curing temperature affect the strength gain of concrete at early and late ages?
In addition, the compressive strength of the concrete specimens, cured at 60°C, increases linearly with time, up to 28 d. With increasing temperature, the compressive strength of the concrete decreases, but the overall strength is still higher after 28 d than at 3 or 7 d curing ages.
What is the objective of curing of concrete?
The objective of curing is to prevent loss of moisture and maintain a favorable temperature to support continued hydration. Without an adequate supply of moisture, the cementitious materials in concrete cannot react to form a quality product.
What increases concrete strength?
The compressive strength of concrete can be increased by: Including admixtures. Adjusting the cement type and quantity. Reducing the water/cement ratio.
What does strength of concrete depend on?
Abrams water/cement ratio law states that the strength of concrete is primarily dependent upon the water/cement ratio provided the mix is workable. It says that the strength of a concrete mix is inversely related to the mass ratio of water to cement. As the water content increases, the strength of concrete decreases.
What are the effects of curing on concrete performance?
Effect of Curing on concrete performance 1 Increases Strength 2 Increases Water tightness 3 Increases Abrasion resistance 4 Increases Freeze-thaw resistance 5 Increases Volume stability 6 Decreases permeability
How long does it take for concrete to cure at 5 degrees?
structures, the curing period at temperatures above 5º C (40º F) should be a minimum of 7 days or until 70\% of the specified compressive or flexural strength is attained. The period can be reduced to 3 days if high early strength concrete is used and the temperature is above 10º
What is the best way to cure concrete members?
For massive members, the heat generated by the concrete during hydration will be adequate to provide a satisfactory curing temperature. For non-massive members, a good alternative is steam curing, which provides both moisture and heat.
What are the factors that affect the strength of concrete?
In addition, the effect of the curing method on strength is largely influenced by the environment and curing conditions [10–13]. Hot weather leads to a decrease in the workability of concrete and results in slump loss.