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Some of the advantages of using SCC are: Can be placed at a faster rate with no mechanical vibration and less screeding, resulting in savings in placement costs.Improved and more uniform architectural surface finish with little to no remedial surface work.Job site water addition to SCC may not always yield the expected increase in flowability and could cause stability problems Full capacity mixer truck loads may not be feasible with SCCs of very high flowability due to potential spillage.

Reduction or elimination of vibrator noise potentially increasing construction hours in urban areas.Minimizes movement of ready mixed trucks and pumps during placement.SCC may have to be placed in lifts in taller elements.Once the concrete is in place it should not display segregation or bleeding/settlement.Retention of flowability of SCC at the point of discharge at the jobsite is an important issue.

Hot weather, long haul distances and delays on the jobsite can result in the reduction of flowability whereby the benefits of using SCC are reduced.The slump flow test (see Figure 1), using the traditional slump cone, is the most common field test and is in the process of being standardized by ASTM.The slump cone is completely filled without consolidation, the cone lifted and the spread of the concrete is measured.Improved consolidation around reinforcement and bond with reinforcement Improved pumpability.Improved uniformity of in-place concrete by eliminating variable operator-related effort of consolidation.Full capacity mixer truck loads may not be feasible with SCCs of very high flowability due to potential spillage.