Figure IIi-2
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Figure III-2: Flowchart. Flowchart for the selection of durable aggregates.
This flowchart shows how to evaluate an aggregate source that has already passed
ASTM 33 requirements.
The following represent scenarios when aggregates that perform satisfactorily
in the field under similar conditions and are potentially non-durable should
be mitigated or rejected. If the aggregate does not perform satisfactorily in
the field under similar conditions, it should be rejected or mitigated and the
failure should be investigated using Guideline 2.
- Aggregate is ASR susceptible, and has expanded beyond the limits set forth
in ASTM C 12 60 and 12 93.
- Aggregate is comprised of a sufficient quantity of potentially unstable
minerals so as to be deleterious.
- Aggregate is susceptible to freeze-thaw, fails the AASHTO 1 0 3 soundness
test, and does not meet the ASTM 6 6 6A durability requirements.
- Aggregate is not potentially ASR susceptible or exceed the ASTM C 12 60
or 12 93 expansion limits, and it does not meet all of the durability requirements.
- Aggregate is not potentially ACR susceptible and it does not meet all of
the durability requirements.
- Aggregate is potentially ACR susceptible, does not exceed the ASTM C 11
05 expansion limit, but the aggregate does not meet all durability requirements.
- Aggregate is potentially ACR susceptible, exceeds the ASTM C 11 05 expansion
limits, however expansion is not due to ACR and the aggregate does not meet
all durability requirements.
- Aggregate is not freeze-thaw susceptible and it does not meet all durability
requirements.
- Aggregate is freeze-thaw susceptible and passes the AASHTO T 1 0 3 soundness
test, but the aggregate does not meet all durability requirements.
- Aggregate is not made of potentially unstable materials and does not meet
all durability requirements.
- Aggregate is made of potentially unstable materials, however the materials
are not present in a sufficient quantity to be deletetorious, and the aggregate
does not meet all durability requirements.
The following represents a scenario when aggregates that perform satisfactorily
in the field under similar conditions and are potentially non-durable should
be rejected.
- Aggregate is ACR susceptible, exceeds the ASTM C 11 05 expansion limits
and expansion is due to ACR.
The following represents scenarios when aggregates that perform satisfactorily
in the field under similar conditions should be accepted for use and are non-durable
should be accepted for use. Note that all aggregates that are not potentially
non-durable should be accepted for use in concretes.
- Aggregate is not potentially ASR susceptible and meets all durability requirements.
- Aggregate is potentially ASR susceptible, has expansion that does not exceed
ASTM C 12 60 and/or 12 93 limits, and meets all durability requirements.
- Aggregate is not potentially ACR susceptible and meets all durability requirements.
- Aggregate is potentially ACR susceptible, has expansion that does not exceed
ASTM C 11 05 limits, and meets all durability requirements.
- Aggregate is potentially ACR susceptible, has expansion that exceeds the
ASTM C 11 05 limits but is not due to ACR, and meets all durability requirements.
- Aggregate is not potentially freeze-thaw susceptible and meets all durability
requirements.
- Aggregate is potentially freeze-thaw susceptible, passes the AASHTO T 1
0 3 soundness test, and meets all durability requirements.
- Aggregate is not made of potentially unstable minerals and meets all durability
requirements.
- Aggregate is made of potentially unstable materials but they are not present
in a quantity sufficient to be deleterious, and meets all durability requirements.