Civil Engineering Reference
In-Depth Information
120
Compressive strength
Flexural strength
100
80
60
40
20
0
1
3
7
28
Age (days)
16.7
Age effect on compressive and flexural strength (Rebeiz, 1996).
100
80
60
40
20
0
0
0.002
0.004
0.006
0.008
0.010
Strain (mm/mm)
16.8
Typical stress-strain curve in compression (Rebeiz, 1996).
for overlay and repair applications on Portland cement concrete, especially
when large thermal and mechanical movements occur (rebeiz, 1996).
The viscoelastic properties of the polymer binder give rise to high creep
values for PCs (Blaga, 1973). The elastic modulus depends on the formulation
and may range from 20 to about 50 gPa; the tensile failure strain is usually
1%. Shrinkage strains vary with the polymer used (high for polyester and
low for epoxy-based binder).
Abdel-Fattah and El-Hawary (1999) studied the influence of the type of
resin (epoxy and polyester) on the flexural and ultimate compressive strength,
strain at failure and ductility of PC. The results show that the maximum
flexural strength for polymer concrete can be three times higher than that of
