United States Department of Transportation
i
Influence of fly ash, slag cement and specimen curing on shrinkage of bridge deck concrete.
-
2014-12-01
[PDF-2.93 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Corporate Publisher:
-
Abstract:Cracks occur in bridge decks due to restrained shrinkage of concrete materials. Concrete materials shrink as
cementitious materials hydrate and as water that is not chemically bonded to cementitious materials
migrates from the high humid environment of the concrete to an environment with lower humidity.
Reinforcing steel and structural supporting members provide restraint to this shrinkage which causes tensile
stress in the concrete. When these tensile stresses exceed the tensile strength of the concrete, cracks occur
and provide relief for these stresses. MDOT engineers wanted to determine the usefulness of supplementary
cementitious to reduce shrinkage of concrete materials and subsequent cracking. This research project
investigates length change of concrete as influenced by supplementary cementitious materials including
Class C fly ash, Class F fly ash, and slag cement. The use of liquid membrane and 7-day, 14-day, and 28-
day moist curing periods were also investigated to determine the influence of curing on length change of
standard prism specimens.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
