What is the effect of age of concrete?

What is the effect of age of concrete?

The test results showed that the core compressive strength increases as the age of concrete increase, but the core strength is somewhat higher than 28-day cube compressive strength even up to the age 270 days in moderate concrete, while the core compressive strength remains lower than 28-day cube compressive strength …

What factors may affect the accuracy of the compression test?

There are three main factors that affect concrete compression results: the specimen size, shape, and friction at its ends. These factors affect the observed phenomena, and they affect each other.

What is the effect on strength of concrete with age?

Concrete mainly gains strength by hydration of water present in it, this will lead to decrease in water cement ratio and increase in strength of concrete. Therefore, Strength of concrete increases with age.

What are the factors affecting the compressive strength of concrete?

Factors Affecting Strength of Concrete

• Quality of Raw Materials.
• Water / Cement Ratio.
• Coarse / fine aggregate ratio.
• Aggregate / Cement Ratio.
• Age of concrete.
• Compaction of concrete.
• Temperature.
• Relative humidity.

What is the effect of age of concrete on the water cement ratio?

The results showed that with the increase of curing age, the greater the water-cement ratio is, the smaller the strength growth rate is; the smaller the water-cement ratio is, the greater the strength growth rate is.

What is a concrete compression test?

The compression test measures concrete strength in the hardened state. Field concrete samples are prepared, cured and tested according to ASTM standard procedures. Specimens are prepared from concrete taken from different construction sites.

What are the factors affecting the compressive strength of a metal specimen?

What is the effect of age of concrete on the water cement ratio vs strength?

How does the strength of concrete differ with age of concrete?

How does the strength of concrete differ with age of concrete? Explanation: It increases with increase in age. The strength measured after days, months and years shows an increase. It takes 28 days for concrete to attain full strength.

How does compaction affect strength of concrete?

Compaction is the process which expels entrapped air from freshly placed concrete and packs the aggregate particles together so as to increase the density of concrete. It increases significantly the ultimate strength of concrete and enhances the bond with reinforcement.

What is the compaction factor test on concrete?

The compaction factor test on concrete is a very sensitive test and can be used even for the concrete with very low workability which cannot be done by the slump test. This test is known as the compaction factor test because the degree of workability is defined as the amount of work required for placing and compacting fully.

How does compaction affect the strength of moist-cured concrete?

On the other hand, compaction received by concrete structures and standard specimens may be different. The strength of moist-cured concrete mainly depends on the water-to-cement ratio and degree of compaction. The presence of voids in concrete due to improper compaction significantly reduces the strength.

What is the effect of age on concrete core strength?

Effect of Age on Concrete Core Strength Results. The test results showed that the core compressive strength increases as the age of concrete increase, but the core strength is somewhat higher than 28-day cube compressive strength even up to the age 270 days in moderate concrete, while the core compressive strength remains lower than 28-day cube…

How to prepare theconcrete mix?

Concrete mix is prepared as per mix design in the laboratory. Procedure of Compaction Factor Test on Concrete Place the concrete sample gently in the upper hopper to its brim using the hand scoop and level it.