Materials selection for concrete overlays : the final report Page: 109
xviii, 192 p. : col. ill. ; 28 cm.View a full description of this report.
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Flowchart 2: Materials Selection
This flowchart provides a checklist for selecting recommended materials for concrete
overlay application (see corresponding section in the 0-6590 training manual for
further information)
Cement
(Sec. 3.3.1)Normal
Placement:
-Type I/IIExpedited Placement:
-Type III or more finely
ground Type I
-Will result in higher heat of
hydration, which will
encourage thermal crackingFly ash
(Sec. 3.3.3)
Consider using a Class F or C fly ash if the need is:
-Improve workability, finishing, and durability
-Lower heat of hydration
-RedLuce cost
NOTE: Initial strength gain may be reduced, especially with a Class F fly ash
Aggregates
(Sec. 3.3.5)Coarse Aggregate (CA):
-CTE and MOE of CA existing pavement
-Min. CA size = 0.5 inch
-Max. CA size = 1/3 the overlay thickness <
1 to 1.5 inchesFine Aggregate (FA):
-Natural FAs are preferred due to concerns
with skid resistance performance of concretes
w/ manufactured FA
-non reactive and low absorption
-Acid insoluble residue, 60%Admixtures
(Sec. 3.3.7)
Water Reducing Agent:
Improves workability
Improves distribution of fibers in mixture109
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Kim, Dong H.; Fowler, David W.; Ferron, Raissa P.; Trevino, Manuel M. & Whitney, David P. Materials selection for concrete overlays : the final report, report, July 2012; Austin, Texas. (https://texashistory.unt.edu/ark:/67531/metapth303706/m1/129/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.