TM 5-822-7/AFM 88-6, Chap. 8
Table 3. Grading of coarse aggregate
Sieve Size
Percentage by Weight Passing Individual Sieves
U. S. Standard
No. 4 to
No. 4 to
3/4 in. to
1 in. to
S q u a r e Mesh
3/4 in.
1 in.
1-1/2 in.
2 in.
--
--
--
2-1/2
in.
100
--
--
97
3
2 in.
100
50 '20
1-1/2 in.
100
7
7
973
100
1 in.
--
955
3/4 in.
--
--
1/2
in.
--
--
33
3/8 in.
--
--
No. 4
--
--
No. 8
waive table 4 requirements for Air Force pavements.
(3.) Deleterious substances.
Upon request, the AFRCE and the using command
(a) Pavements used by aircraft. Table 4 lists
the common deleterious substances and specifies
will be furnished available engineering information
limits for these materials. The performance history
on local aggregates and behavior records on pave-
ments made from them. A copy of the instructions
of local aggregates contributing to pavement
and the revised requirements will be furnished for
defects will be the determining factor in setting the
information to the HQDA (DAEN-ECE-G) or
limits for deleterious substances. The limits are
AFESC as applicable. In the case of Air National
intended to eliminate popouts and weatherouts in
Guard and Army pavements, the using command
airfield pavements. Other deleterious substances
will be furnished information on the costs of aggre-
known to contribute to popouts will be identified by
gates complying with specification requirements
the contracting officer, and suitable limits will be
and on less costly local aggregates along with
specified. Calcium oxide (CaO) and magnesium oxide
behavior records on pavements made with local
(MgO) or a mixture thereof, in lumps, representing
aggregates. However, requirements will be waived
the hard burned oxides from fluxing stone or refrac-
only if requested by the Air National Guard Base
tory brick should be added to the list of deleterious
Detachment Commander or the Army Installation
substances if air-cooled blast furnace slag is used as
Commander with his assurance that operational
the aggregate. Since the types of materials producing
requirements will be satisfied by a performance that
popouts will vary for different areas, some adjust-
is equal to that of existing pavements constructed
ments of the limits may be desirable for individual
with these less costly aggregates. Requests will be
projects. Reductions in specified limits may be
submitted for approval to HQDA (DAEN-ECE -G)
made as necessary, but increases to permit the use
with proposed specification requirements, compara-
of local aggregates that have an acceptable experience
tive cost estimates, and evidence that operational
record will be governed by the following procedures.
requirements will be satisfied.
Air Force Regional Civil Engineers (AFRCE) have
been authorized to instruct division engineers to
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