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Question
Should reversible moisture movement be taken into account in estimating movement for movement joints?
Answer Size of concrete is affected by changes in distinctive humidity- moisture reasons growth although drying causes shrinkage. Such humidity movement is reversible. This is entirely different from aeration shrinkage in which concrete slowly loses humidity during hardening, thus causing irreparable reduction. In fact, variation of humidity and estimated reversible moisture movement is not significant (about 30 percent) and so, its contribution to group does not validate for group joints .
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