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The addition of surfactants in the concrete mix results in:
i). Increase in the water cement ratio
ii). Decrease in the water cement ratio
iii). Increase in the strength of concrete
iv). Decrease in the curing duration
v). Increase in the density of concrete
Which one of the following statements is correct?
- a)iii, iv and v
- b)ii, iii and v
- c)i, iii and iv
- d)i and iv only
Correct answer is option 'B'. Can you explain this answer?
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The addition of surfactants in the concrete mix results in:i). Increas...
The introduction of suitable surfactants into the concrete mix results in the formation of fine and stable air bubbles. When the fresh mixture begins to cure, the bubbles within it become mineralized and become an integral part of it. In this way, an additional space is created inside the concrete structure inside which the freezing water expands.
This prevents an increase in internal pressure, which is responsible for the formation of cracks during low temperatures.
As the voids in concrete are reduced, so less water is required to lubricate the mix, thus water cement ratio will be decreased, and strength of concrete will be increased. Addition of surfactants will increase the density of concrete.
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The addition of surfactants in the concrete mix results in:i). Increas...
Surfactants are chemical compounds that are added to the concrete mix to reduce the surface tension of the water and improve the workability of the mix. The addition of surfactants can result in the following changes:
Decrease in Water Cement Ratio:
Surfactants can reduce the surface tension of water, allowing it to spread more easily throughout the mix. This can reduce the amount of water needed to achieve the desired workability, resulting in a decrease in the water-cement ratio.
Increase in Strength:
Surfactants can also help to disperse the cement particles more evenly throughout the mix, resulting in a more uniform distribution of the cement paste. This can lead to an increase in the strength of the concrete.
Decrease in Curing Duration:
Surfactants can also improve the curing process by reducing the time required for the concrete to reach its full strength. This can result in a shorter curing duration.
Increase in Density:
Surfactants can also help to reduce the air content in the concrete, resulting in a denser, more durable product.
Based on these factors, the correct statement is option B, which includes a decrease in the water-cement ratio, an increase in strength, and an increase in density.
Decrease in Water Cement Ratio:
Surfactants can reduce the surface tension of water, allowing it to spread more easily throughout the mix. This can reduce the amount of water needed to achieve the desired workability, resulting in a decrease in the water-cement ratio.
Increase in Strength:
Surfactants can also help to disperse the cement particles more evenly throughout the mix, resulting in a more uniform distribution of the cement paste. This can lead to an increase in the strength of the concrete.
Decrease in Curing Duration:
Surfactants can also improve the curing process by reducing the time required for the concrete to reach its full strength. This can result in a shorter curing duration.
Increase in Density:
Surfactants can also help to reduce the air content in the concrete, resulting in a denser, more durable product.
Based on these factors, the correct statement is option B, which includes a decrease in the water-cement ratio, an increase in strength, and an increase in density.
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The addition of surfactants in the concrete mix results in:i). Increase in the water cement ratioii). Decrease in the water cement ratioiii). Increase in the strength of concreteiv). Decrease in the curing durationv). Increase in the density of concreteWhich one of the following statements is correct?a)iii, iv and vb)ii, iii and vc)i, iii and ivd)i and iv onlyCorrect answer is option 'B'. Can you explain this answer?
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