Civil Engineering Reference
In-Depth Information
Table 7.14
Conditions for use of RA in concrete (RILEM 1994)
Parameters
Type I
Type II
Type III
Particles greater than C4 mm
100 %
Use of recycled sand
Not recommended
C16/20
a
Maximum authorised strength class
C50/60
Unlimited
Exposure classes
b
/additional checks
2a and 4a
ARS testing; not permitted
to exposure class 4a
ARS testing
ARS testing
2b and 4b
No use is allowed
ARS and freeze-thaw resistance tests
ARS and freeze-thaw resistance tests
3
No use if allowed
ARS and freeze-thaw resistance
tests; test with de-icing salts
ARS and freeze-thaw resistance tests;
test with de-icing salts
Dimension
Eurocode 2 (EC2) with corrections
Coefficient for f
ctm
1
1
1
Coefficient for modulus of elasticity
0.65
0.80
1
Creep
1
1
1
Shrinkage coefficient
2
1.5
1
a
In the case of RA with SSD density over 2,000 kg/m
3
, the strength class can be higher than C30/37
b
Environmental class, ENV 206 1994
c
Resistance against alkali-silica reaction
