Question

A dispute has arisen between the sub-contractor and concrete supplier with the level of
workability reported for a large batch of concrete supplied at a construction site. The
supplier has confirmed that the batch supplied at location A has a slump pattern typically
representative of zero slump. In contrast, the sub-contractor has confirmed that the batch
supplied at location B has a slump pattern typically representative of shear slump. Briefly
describe the consistency grades of fresh concrete that apply to each of the slump patterns
reported at locations A and B, and indicate which methods of compaction are required to
consolidate each of the concretes at locations A and B.

a . Zero slump is representative of stiff consistency and external vibration is required, and shear slump is representative of flowing consistency and hand compaction is required

b. Zero slump is representative of stiff consistency and external vibration is required, and shear slump is representative of a loss of cohesiveness and the onset of segregation

c . Zero slump is representative of plastic consistency and hand compaction is required, and shear slump is representative of a loss of cohesiveness and the onset of segregation

d. Zero slump is representative of plastic consistency and hand compaction is required, and shear slump is representative of flowing consistency and no compaction is required

Answer 1