Consolidating concrete vibration

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is a concrete mix which has a low yield stress, high deformability, good segregation resistance (prevents separation of particles in the mix), and moderate viscosity (necessary to ensure uniform suspension of solid particles during transportation, placement (without external compaction), and thereafter until the concrete sets).

In everyday terms, when poured, SCC is an extremely fluid mix with the following distinctive practical features - it flows very easily within and around the formwork, can flow through obstructions and around corners ("passing ability"), is close to self-levelling (although not actually self-levelling), does not require vibration or tamping after pouring, and follows the shape and surface texture of a mold (or form) very closely once set.

Ironically, corners and lintels—the areas that need the most strength—are the areas where poor consolidation is most likely to occur.

But the problems with SCC are that it is susceptible to segregation, requires more expertise and quality control, can be expensive, and is not always robust (meaning small changes in water content can cause big changes in workability). Steffes Iowa Department of Transportation, Materials Department, 800 Lincoln Way, Ames, Iowa 50010.The Iowa Department of Transportation has noticed an increase in the occurrence of excessively vibrated Portland Cement Concrete (PCC) pavements.As a result, pouring SCC is also much less labor-intensive compared to standard concrete mixes.Once poured, SCC is usually similar to standard concrete in terms of its setting and curing time (gaining strength), and strength.

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