Vermont · answered by Verika · verified against sources
What slump is allowed for structural concrete on Vermont highway projects?
"The mix shall not exhibit segregation at the slump/spread used at placement. If the Engineer suspects there is segregation, the Engineer will require a slump/spread test be performed by the Contractor to visually observe the characteristics of the mix. If, in the opinion of the Engineer, the mix does exhibit segregation, the load will be rejected and subsequent loads shall be tested for a minimum of three loads or until the problem is corrected." [1] "If the Contractor needs a concrete with a slump/spread greater than 8 inches, the Contractor shall propose to the Engineer to use an SCC mix, which shall be submitted to the Engineer for review and acceptance." [1] "The slump/spread (flowability) shall be such that material can completely fill the voids or area as needed without segregation." [1] "The slump/spread minimums and maximums , as determined from trial batches." [3] "The concrete shall be classified and tested as self - consolidating concrete (SCC) if the minimum spread is at least 18 inches." [3]
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