EP 1110-2-12
30 Sep 95
Figure 3-2. Tensile strength range, RCC, MSA > 1.5 inches, consistency < 30 seconds vibration, mortar
bedding
3-5.
Modulus of Elasticity
be small. If the coarse aggregate particle shape indi-
cates the possibility of significant anisotropy, both
RCC will usually provide a modulus of elasticity
vertical and horizontal cores obtained from the labo-
equal to, or greater than, that of conventional mass
ratory test placement should be tested.
concrete of equal compressive strength. The modulus
of RCC in tension is equal to that in compression.
3-4.
Shear Strength
The static modulus of elasticity, in the absence of
testing, can be assumed equal to (ACI Committee-207
The shear strength along lift joint surfaces is always
1973):
less than the parent concrete; therefore, final shear
E
57,000 fc
strength determination should be based on tests of
representative samples from the dam or test fill.
where E
static modulus of elasticity
Both the bond strength and the tangent of the angle
fc
static compressive strength of RCC
of internal friction can be increased by 10 percent to
account for the apparent higher strengths associated
with seismic strain rates.
3-3
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