LABORATORY EVALUATION OF A CHEMICAL TECHNIQUE TO DETERMINE WATER AND CEMENT CONTENT OF FRESH CONCRETE
This 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 proportions. Aggregate type was the only major concrete parameter that significantly influenced test results. Although aggregate moisture condition, mix proportions, and length of mixing time also influenced test results, their influences were minor.
Army Construction Engineering Research LaboratoryP.O. Box 4005
Champaign, IL USA 61820
- Howdyshell, P A
- Publication Date: 1974-7
- Pagination: 41 p.
- TRT Terms: Cement content; Concrete; Estimating; Evaluation; Methodology; Moisture content; Plasticity; Strength of materials
- Old TRIS Terms: Plastic state; Test results
- Subject Areas: Highways; Materials;
- Accession Number: 00264352
- Record Type: Publication
- Report/Paper Numbers: Intrm Rpt.
- Files: TRIS
- Created Date: Jan 9 1975 12:00AM