Details:

Creators:
Ballard, Zachoriah J. ; Durham, Stephan ; Liu, Rui ;
Ballard, Zachoriah J. ; Durham, Stephan ; Liu, Rui ; Less -
Corporate Creators:
University of Colorado at Denver ;
Corporate Contributors:
United States. Federal Highway Administration ;
Subject/TRT Terms:
[+]
Admixtures
Cement Content
Concrete
Fly Ash
Mix Design
Specifications

Publication/ Report Number:
CDOT-2013-9 ;
Resource Type:
Tech Report ;
Geographical Coverage:
Colorado ;
Corporate Publisher:
Colorado. Dept. of Transportation. Research Branch ;
NTL Classification:
NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ; NTL-HIGHWAY/ROAD TRANSPORTATION-Design ;
Abstract:
For more than 50 years now, concrete technology has advanced, but CDOT specifications for durability have remained mostly unchanged. The minimum cement content for a given strength is derived from mix design guidelines that were developed before water reducing admixtures were widely used and accepted. The minimum cement content generally controls the mix design process, with many mix designs exceeding the minimum strength requirements by 500 to 1,000 psi. Ready mix suppliers that supply to non-CDOT projects have developed mix designs that use less cement and more fly ash than CDOT mix designs and exceeded their strengths. They are able to accomplish this improvement through gradation optimization and admixture combinations. The proposed study tested current CDOT standard mix designs to determine minimum required performance criteria that will be used to develop performance-based concrete mix design criteria.
Format:
PDF ;
Funding:
22.5 ;
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:ff2ea9043e9cd7386173402736957daf67d996a66e8b64a02b16961647daf95e
File Type:

Supporting Files

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