DISTENTION IN CONCRETE
Keywords:
TYPES OF DISTENTION, CONCRETE SLAB SURFACE DEFECTSAbstract
The paper discusses the distention in concrete .When a blemish is seenon the surface of a concrete slab it couldlikely be swelling. Blisters, cracking, curling, discoloration,dusting, efflorescence, low spots, Pop outs, scalingor spallingare different types of distention’s. Which are caused when an extraamount of entrapped air withheld in the concrete by a high percentage of material passing through various size sieves itcan also occur due to restraint to shortening, sub gradesettlement, thermal contraction etc. Reduction in absolute volume of solids and liquids in hydrating paste results to chemical shrinkage. Maincauses for this are an excess amount of entrapped air in concrete, insufficient vibrations during compaction and finishing when the concrete is still spongy.
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