Civil Engineering Reference
In-Depth Information
10
6
Unmodified
Cloisite 7%
Nanofill 7%
10
5
10
4
y
= -0.0016
x
+ 6.4211
y
= -0.0014
x
+ 6.331
y
= -0.0015
x
+ 6.3902
2
= 0.9869
(Cloisite 7%)
2
= 0.9863
(Unmodified)
2
= 0.9801
(Nanofill 7%)
R
R
R
10
3
500
750
1000
1250
1500
1750
2000
Stress (kPa)
6.14
Fatigue test result at 5°C.
10
6
Unmodified
Cloisite 7%
Nanofill 7%
10
5
10
4
y
= -0.0068
x
+ 6.4838
R
y
= -3.5755
x
+ 13.028
R
y
= -3.9514
x
+ 14.096
R
2
= 0.9903
(Cloisite 7%)
2
= 0.9923
(Unmodified)
2
= 0.984
(Nanofill 7%)
10
3
100
150
200
250
300
350
400
450
Stress (kPa)
6.15
Fatigue test result at 25°C.
performed better under fatigue when compared to the unmodifi ed mixtures
(Fig. 6.17).
The average fatigue life ratio of modifi ed mixtures is about 1.70 for
Cloisite-15A and about 1.45 for Nanofi ll-15. The fatigue life ratio depends
on the stress level. At high stress levels, the fatigue life ratio decreases (see
Fig. 6.17). This can be due to the rest period of loading applied in the tests
at 25°C.
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