ISSN: 0149-6123
Page Count: 15

Evaluation of Selected Procedures for the Rapid Analysis of Fresh Concrete
Lawrence, D
Civil engineer and chemical engineer, U.S. Army Corps of Engineers, Construction Engineering Research Laboratory, IL

Phillippi, HM
Production engineer, Gulf Oil Corporation, LA

Howdyshell, PA
Civil engineer and chemical engineer, U.S. Army Corps of Engineers, Construction Engineering Research Laboratory, IL

Head, WJ
Associate professor of civil engineering, West Virginia University, WV

Abstract

Presented in this paper are results of a program to evaluate procedures for the rapid determination of both cement and water contents of fresh concrete. Three generations of a general method were considered. The abilities of the current (Generation II-Construction Engineering Research Laboratory/Kelly Vail [CERL/KV]) and recently evolved (Generation III-Construction Engineering Research Laboratory/Concrete Quality Monitor [CERL/CQM]) procedures to aid in predicting cement and water contents of a variety of concrete mixtures were determined in an extensive series of side-by-side laboratory tests. Evaluated in the tests were effects of sampling techniques and aggregate type. Analysis of variance techniques were used as aids in establishing accuracy statements and comparing the two procedures. Results demonstrated that accuracies of the CERL/KV and CERL/CQM methods were equivalent for identical test conditions. Further, it was determined that aggregate characteristics affect results of both cement-content tests and both water-content tests.

Keywords:
moisture content, concretes, statistical analysis, fresh concrete, rapid analysis, concrete quality control, cement content

Paper ID: CCA10259J
DOI: 10.1520/CCA10259J
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