Accession Number : AD0784055

Title :   Laboratory Evaluation of a Chemical Technique to Determine Water and Cement Content of Fresh Concrete.

Descriptive Note : Interim rept.,


Personal Author(s) : Howdyshell,P. A.

Report Date : JUL 1974

Pagination or Media Count : 43

Abstract : The report presents information obtained from laboratory evaluation of a chemical procedure for determining the water and cement content of a concrete in the plastic state. The procedure uses chloride ion titration to determine water content, and flame photometry (calcium signature) to determine cement content. This study evaluated the procedure to determine if it could be used to estimate concrete strength potential and to define to what extent test results are influenced by aggregate type, aggregate moisture conditions, aggregate absorption capacity, concrete mix proportions, mix time, and time of sampling. Results indicate that the procedure can rapidly (approximately 15 minutes) determine the water and cement content of fresh concrete and that it can be used to predict strength potential with an accuracy equal to that of predicting strength from known mix proporations. (Modified author abstract)

Descriptors :   *Concrete, *Volumetric analysis, *Cements, Strength(General), Plastic properties, Calcium, Chemical analysis

Subject Categories : Physical Chemistry
      Ceramics, Refractories and Glass
      Construction Equipment, Materials & Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE