"National Research Council (É.-U.). Transportation Research Board." . . "HRB." . . "TRB." . . . . "Beton" . . . . . . . . . . . . . . . . . . . . . . . . . . . "Evaluation of procedures used to measure cement and water content in fresh concrete"@en . . "Evaluation of procedures used to measure cement and water content in fresh concrete" . "Vandindhold" . .