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

• No Additional Files

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