A concrete mix containing steel fibres, when tested for workability, showed zero

Question

A concrete mix containing steel fibres, when tested for workability, showed zero slump. Which key feature is responsible for the observation of zero slump in the concrete mix containing the steel fibres? O a. The addition of steel fibres to the concrete mix has made the concrete mix stiff and, therefore, the concrete mix has flash set O b. The absorption characteristics of the steel fibre reinforced concrete mix is different to a normal concrete mix and, hence, the concrete mix has become dry c. The concrete mix is very dry and contains an insufficient amount of water and is not workable d. The slump test is not a good measure of workability of fibre reinforced concrete

Explanation / Answer

It is because of the addition of steel fibres to the concrete mix has made the concrete mix stiff and,therefore, the concrete mix has flash set......option (a) is correct......and also the slump test is not a good measure of workability of fibre reinforced concrete ..... But it is not the perfect reason for the question asked.......

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