Economical Concrete Mix Designs Utilizing Blended Cements, Performance Based Specifications, and Rational Pay Factors
Record Type: DOT
There is a need to contain the escalating costs of construction projects through the use of economical concrete materials and rational acceptance criteria. This is a proposal to increase competitiveness among project bidders by improving the procedures for materials selection, specifications, and also pay factors for contract administration. A preliminary study conducted for joint ADOT/ARPA committee has indicated that there are significant potential cost savings through the reduction of minimum specified cement content in various grades of concrete. Such reductions however must be accomplished so that the performance of final product is not jeopardized. This project will utilize and evaluate recent advances in performance enhancing mineral admixtures and supplementary cementitious materials, in addition to QC parameters used for specification and acceptance criteria in order to develop economical concrete mixtures. This project will promote better quality and economics of using concrete materials by focusing on the: (1) mix design formulation based on economy, superior performance, quality control, and durability; (2) better utilization of mineral admixtures such as fly ash through reducing the minimum cement requirements for 2500 psi and 3000 psi concrete mixtures; and (3) evaluation of the acceptance criteria and pay factor adjustment methods based on a bonus/penalty factors in improving quality control and specification procedures.
Start date: 2006/10/1
Status: Programmed
Contract/Grant Number: SPR 633
Total Dollars: 120000
Source Organization: Arizona Department of Transportation
Date Added: 12/14/2006
Index Terms: Admixtures, Mix design, Blending, Blended cement, Cost savings, Cementitious material, Contract administration, Acceptance criteria, Acceptance, Fly ash, Quality control, Durability tests, Performance based specifications, Research projects,
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Federal Highway Administration
http://www.fhwa.dot.gov/
1200 New Jersey Avenue, SE
Washington, DC 20590
USA
Phone: (202) 366-4000
Arizona Department of Transportation
http://www.azdot.gov
206 South 17th Avenue
Phoenix, AZ 85007
USA
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Dimitroplos, Christ G.
Phone: (602) 712-7850
Fax: (602) 712-3400
Email: cdimitroplos@azdot.gov
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