Q. Shrinkage in concrete is caused mainly by a loss of water by evaporation or by hydration of cement.

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Q. Fall of temperature and carbonation may also cause shrinkage.

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Q. It is observed that 14-34% of the 20 years shrinkage occurs in ________

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Q. It is observed that 40-80% of the 20 years shrinkage occurs in _____________

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Q. It is observed that 66-85% of the 20 years shrinkage occurs in _____

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Q. If the concrete is placed in 100% relative humidity for a length of time then there WON’T be any shrinkage.

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Q. The magnitude of autogenous shrinkage is ________

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Q. Which aggregates have high shrinkage?

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Q. Which aggregates have low shrinkage?

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Q. What is plastic shrinkage?

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Q. What is drying shrinkage?

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Q. What is autogenous shrinkage?

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Q. What is carbonation shrinkage?

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Q. ACI 305.R.91 specifies Evaporation rate __ kg/hr/m² should be avoided to prevent plastic cracking.

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Q. Carbonic Acid + Ca(OH)₂ ⇨ X. What is the main compound in X?

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Q. If there is continuous supply of H₂O to the concrete during hydration, concrete expands due to absorption of water by the cement gel.

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Q. Reduction in the volume due to shrinkage causes _____

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Q. From the below figure, what does A signify?

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Q. From the below figure, what does B signify?

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Q. From the below figure, what is A here?

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