International Building Code Section 1904


International Building Code 1904.1

Water-cementitious materials ratio. Where maximum
water-cementitious materials ratios are specified in ACI
318, they shall be calculated in accordance with ACI 318, Section
4.1.

International Building Code 1904.2

Freezing and thawing exposures. Concrete that will
be exposed to freezing and thawing, deicing chemicals or other
exposure conditions as defined below shall comply with Sections
1904.2.1 through 1904.2.3.

Air entrainment. Concrete exposed to freezing
and thawing or deicing chemicals shall be air entrained in
accordance with ACI 318, Section 4.2.1:

Concrete properties. Concrete that will be subject
to the following exposures shall conform to the corresponding
maximum water-cementitious materials ratios
and minimum specified concrete compressive strength
requirements of ACI 318, Section 4.2.2:
1. Concrete intended to have low permeability where
exposed to water;
2. Concrete exposed to freezing and thawing in a moist
condition or deicer chemicals; or
3. Concrete with reinforcement where the concrete is
exposed to chlorides from deicing chemicals, salt, salt
water, brackish water, seawater or spray from these
sources.
Exception: For occupancies and appurtenances
thereto in Group R occupancies that are in buildings
less than four stories in height, normal-weight
aggregate concrete shall comply with the require-
ments of Table 1904.2.2 based on the weathering
classification (freezing and thawing) determined
from Figure 1904.2.2.
In addition, concrete exposed to deicing chemicals shall
conform to the limitations of Section 1904.2.3.

Deicing chemicals. For concrete exposed to
deicing chemicals, the maximum weight of fly ash, other
pozzolans, silica fume or slag that is included in the concrete
shall not exceed the percentages of the total weight of
cementitious materials permitted byACI 318, Section 4.2.3.
374 2006 INTERNATIONAL BUILDING CODE
CONCRETE

International Building Code 1904.2.1

Air entrainment. Concrete exposed to freezing
and thawing or deicing chemicals shall be air entrained in
accordance with ACI 318, Section 4.2.1:

International Building Code 1904.2.2

Concrete properties. Concrete that will be subject
to the following exposures shall conform to the corresponding
maximum water-cementitious materials ratios
and minimum specified concrete compressive strength
requirements of ACI 318, Section 4.2.2:
1. Concrete intended to have low permeability where
exposed to water;
2. Concrete exposed to freezing and thawing in a moist
condition or deicer chemicals; or
3. Concrete with reinforcement where the concrete is
exposed to chlorides from deicing chemicals, salt, salt
water, brackish water, seawater or spray from these
sources.
Exception: For occupancies and appurtenances
thereto in Group R occupancies that are in buildings
less than four stories in height, normal-weight
aggregate concrete shall comply with the require-
ments of Table 1904.2.2 based on the weathering
classification (freezing and thawing) determined
from Figure 1904.2.2.
In addition, concrete exposed to deicing chemicals shall
conform to the limitations of Section 1904.2.3.

International Building Code 1904.2.3

Deicing chemicals. For concrete exposed to
deicing chemicals, the maximum weight of fly ash, other
pozzolans, silica fume or slag that is included in the concrete
shall not exceed the percentages of the total weight of
cementitious materials permitted byACI 318, Section 4.2.3.
374 2006 INTERNATIONAL BUILDING CODE
CONCRETE

International Building Code 1904.3

Sulfate exposures. Concrete that will be exposed to
sulfate-containing solutions or soils shall comply with the
maximumwater-cementitious materials ratios, minimum specified
compressive strength and be made with the appropriate
type of cement in accordance with the provisions of ACI 318,
Section 4.3.

International Building Code 1904.4

Corrosion protection of reinforcement. Reinforcement
in concrete shall be protected from corrosion and exposure
to chlorides in accordance with ACI 318, Section 4.4.