Materials selection for concrete overlays : the final report Page: 76
xviii, 192 p. : col. ill. ; 28 cm.View a full description of this report.
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28-day compressive strength= 6839- 771 SCM content + 347 sacks of cement,
and R2= 70%. (4-4)
A unit change in the SCM content had about twice the influence that a unit change in the
sacks of cement had. Overall, the 28-day compressive strength was less affected by changes in
the SCM content than the 7-day compressive strength.
With a constant mixture design, compressive strength change due to fiber addition was
also explored. Fiber addition slightly improved 7-day (or early age) strength in some specimens.
However, fiber addition slightly decreased 28-day strength in all specimens. The results are
provided in Figure 4.16.
6000
6303
4303
a , 33g3I200
2 OO0GM F
* "-da,. -da -. -da Control
PF
MAC470
FibersTSSF
F300
Figure 4.16. Compressive strength with fiber addition
4.5.3 Flexural Strength
The results for the flexural strength are shown in Table 4.6.
Table 4.6: Flexural strength results
7 days (psi) 28 days (psi)
Mixture
No. Average Average
1 786 799
2 525 693
3 753 777
4 555 692
5 816 884
6 640 830NXR
76
-"8-d.a Control
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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/m1/96/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.