Materials selection for concrete overlays : the final report Page: 61
xviii, 192 p. : col. ill. ; 28 cm.View a full description of this report.
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Cement Mortars" with modifications to accommodate a water reducing agent and fibers. The
following are the test variables for each fiber:
* Cement: 658, 611, 564, and 517 lb (equivalent to7, 6.5, 6, and 5.5-sack cement
factors, respectively).
* FA/(FA+CA): 0.45, 0.40, and 0.35 (by weight).
* Maximum manufacturer recommended dosage of WRDA 82.
The basic approach was to determine the lowest cement content that can be used before
reducing the workability to a predetermined level based on the flow table. As seen in Figures 4.2
through 4.4, when the FA content was increased or the cement content (paste content for a fixed
w/c) was decreased, the workability was reduced. At the highest aggregate ratio and at the
lowest cement content, the workability was below the acceptable limit (the red dotted line). The
acceptable limit was decided based on the experience that mortars that produced a flow table
number of 110 and below gave poor slump values for pavement mixtures.160
140
S120
S100
80
60
S40
20
0APF
- TSSF
NXR7 sacks
FMAC470
-A-GMF
4 F3006.5 sacks
6 sacks
5.5 sacks
Cement Content
Figure 4.2.: Workability comparison at FA/(FA +CA) = 0.3561
I I
c
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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/m1/81/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.