DISTENTION IN CONCRETE

The paper discusses the distention in concrete . When a blemish is seen on the surface of a concrete slab it could likely be swelling. Blisters,cracking,curling,discoloration,dusting,efflorescence,low spots,Pop outs,scaling or spalling are different types of distention�s . Which are caused w hen an extra amount of entrapped air withheld in the concrete by a high percentage of material passing through various size sieves it can also occur due to restraint to shortening,sub grade settlement,thermal contraction etc. Reduction in absolute volume of solids and liquids in hydrating paste results to chemical shrinkage. Main causes for this are an excess amount of entrapped air in concrete,insufficient vibrations during compaction and finishing when the concrete is still spongy.

https://www.ijiert.org/paper-details?paper_id=140971