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The drying shrinkage of concrete is analogous to the mechanism of drying of timber specimen. The loss of free water contained in hardened concrete, does not result in any appreciable dimension change. It is the loss of water held in gel pores that causes the change in the volume.
Suryakanta | April 10, 2015 | Concrete, Concrete Technology, How To, Materials, Tests On Concrete, Tests On Hardened Concrete | 3 Comments. This test method describes the procedure for determining the drying shrinkage or change in length of concrete specimen due to changes in moisture content. A length measuring apparatus incorporating a dial gauge capable of measuring the length accurately to 0.005 mm. (see fig shown below)