Materials selection for concrete overlays : the final report Page: 79
xviii, 192 p. : col. ill. ; 28 cm.View a full description of this report.
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Mixture
Mixture Microstrains
No.
12 407
13 290
14 347
15 310
16 363
17 323The length change was found to be most significantly related to the SCM content (the
fine aggregate ratio is the second most influential factor and its significance is marginal). The
results were best modeled by a regression equation that incorporated all the variables:
Length Change = 0.0328- 0.0039 SCM Content + 0.0017 Fine Agg Ratio -
0.0016 Sack of Cement + 0.00131 (SCM Content)2 - 0.0006 (Fine Agg Ratio)2
+ 0.0008 (Sack of Cement)2 - 0.0004 (SCM Content *Fine Agg Ratio)-
0.0008(SCM Content* Sack of Cement) + 0.0038 (Fine Agg Ratio * Sack of
Cement), and R2= 83.2%. (4-7)
With a constant mixture design, length change due to fiber addition was also explored.
As Figure 4.18 shows, fiber addition did not have an effect on length change.350
3002
,id--Control
10033
PF MAC470
F300
TSSF NXR
Fibrrs
Figure 4.18. Length change results with fibers
4.5.5 Modulus of Elasticity
The results for the elastic modulus are shown in Table 4.8.79
AL
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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/m1/99/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.