Materials selection for concrete overlays : the final report Page: 65
xviii, 192 p. : col. ill. ; 28 cm.View a full description of this report.
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o 0.45 - increased fine aggregate content.
* Cement content.
o 564 lb (6 sacks).
o 611 lb (6.5 sacks).
o 658 lb (7 sacks).
The high level and low level for each factor in un coded units is given in Table 4.3 and in
coded units in Table 4.4. Thus +1 represents the high level, -1 represents the low level, and 0
represents a level that is at the center of the high and low levels. The axial point values for a
factor were selected to correspond with the center point level. For example, for fly ash
replacement, the high level was 50%, low level was 0%, and the center point level (and axial
point level) was 25%.(Detailed concrete mixture proportions for the mixtures are provided in
Appendix B-1.)Table 4.3: Mixture proportions in uncoded units
Cement Cont.
Run Fly Ash (%) FA/(FA+CA) (lb)
1 0 0.35 564
2 50 0.35 564
3 0 0.45 564
4 50 0.45 564
5 0 0.35 658
6 50 0.35 658
7 0 0.45 658
8 50 0.45 658
9-center 25 0.40 611
10-center 25 0.40 611
11-center 25 0.40 611
12-axial 0 0.40 611
13-axial 50 0.40 611
14-axial 25 0.35 611
15-axial 25 0.45 611
16-axial 25 0.40 564
17-axial 25 0.40 65865
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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/m1/85/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.