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Title: Concrete quality assurance using accelerated strength testing
Authors: Ragan, Steven A.
Keywords: Concrete
Concrete additives
Concrete research
Concrete strength
Strength testing
Publisher: Structures Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; SL-84-4.
Description: Miscellaneous Paper
Partial Abstract: This report provides additional information and guidance to division laboratories and field offices within the Corps of Engineers on the use of accelerated strength testing for predicting potential compressive strengths of concrete and assuring the quality of concrete production. Emphasis is placed on the use f ACI Standard 214 for interpreting accelerated strength test results. One hundred and eighty-one pairs of accelerated and 90-day compressive strength test results, representing one concrete mixture used at the Richard B. Russell Dam, Savannah District were collected. In addition, 519 pairs of test results, representing four concrete mixtures used at Lock and Dam No. 1, Red River Waterway, New Orleans District, were also collected. The Richard B. Russell Dam test results were analyzed using a regression equation developed by the U. S. Army Corps of Engjneers South Atlantic Division Laboratory (SADL). The Lock and Dam No. 1 test results were analyzed using a regression equation developed by the U. S. Army Corps of Engineers Waterways Experiment Station (WES) Structures Laboratory. The report concludes that accelerated strength testing can apparently predict concrete potential compressive strengths and assure proper quality control of concrete production if a valid regression equation is developed. The regression equation may be developed from laboratory or field test data. The regression analysis should use a minimum of 30 sets of test data which have a broad strength range. If project materials change during the course of construction, a new linear regression analysis must be performed using compressive strength data representing concrete made from the new materials. Additional investigative studies involving compressive strength test data for future projects are recommended to determine if additional guidance on the use of accelerated strength testing is needed.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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