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AGGREGATE;
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SS-.4-28lb
JULY S, 19;4
SUPERSEDING
Fed. Spec. ss-A-281a
12 November 1941
FEDERAL SPECIFICATION
(FOR) PORTLAND-CEMENT-CONCRETE
This spe.ijicc t km was approved bv the Commissioner, Federal SupplqService,
G.nend SP]t,ices
Administvatiox,
for the use of all Federal wewies.
1. SCOPE AND CLASSIFICATION
1.1 Scope.—This specification covers ag-
gregate for use in concrete (other than
lig!lt-weight concrete). (See 6.1.)
1.2 Classification.
1.2.1 Ckfsses.-Aggregates shall be of the
following classes, as specified:
Class 1.—Fine aggregate.
Class 2.—C0arse aggregate.
1.’2.2 Si;cs.—Fine aggregate shall be of the
size-grading indicated in 3.1.2.1.
Coarse
aggregate shall be of the sizes shown in table
I, as specified (see 3.2.2).
2. APPLICABLE SPECIFICATIONS
2.1 The following Federal Specification,
of the issue in eifect on date of invitation for
bids, forms a part of this specification:
SS–F&406-Road and Paving Materials;
Methods of Sampling and Testing.
(
Activities outside tbe Federal Govcrmnent may
obtain copies of Federal Specifications and Stand-
ards as outlined under “General Information” in
the Index of Federal Specifications and Standards
and at tbe prices indicated i]i the
Index.Tbe Index,
which includes cumulative monthly supplements as
isswd, is for sale on a subscription basis by the
Superintendent of Documents, U. S. Government
Printing Office, Washin@on 25, D. C.
(Single copies of this specification and other
product specifications required by activities outside
the Fckral Government for bidding purposes are
available without charge at the GSA Regional
Offices in Boston, New York, Atlanta, Chic: w.,
271!LI-;I.!:!II
Kansas City,Mo.,Dallas,Denvir,San Francisco,
Los Armeles.Seattle.and V/ashinzton,D. C.
(Fed&al Government activities ‘may obtain copies
of Federal Specifications and Standards and the
Index of FederalSpecifications and Standards from
established distribution points in their agencies.)
2.2 Specifications and publications ap-
plicable only to individual deportments are
listed in section 7.
3. REQUIREMENTS
.3.1 Fine
aggregate.
3.1.1 General clmrwcterist.ics.-Fine aggre-
gate shall consist of natural sand, manu-
factured sand, or a combination thereof.
(See 6.4.)
3.1.2 %we a?2a@SiS.
3.1.2.1 Fine aggregate, except as provided
in 3.1.2.2, shall be graded., within the follow-
ing limits:
‘“ta’pa’sing
I ‘erc’ntby’ve
Y.-inch sieve ------- 100
No. 4 sieve -------
95-100
No. S sieve . ..--.. 80-100
?Jo, 16 sieve -------
50- S5
No, 30 sieve -------
25-60
No. 50 sieve . . . . . . .
10- 30
No. 100 sieve -------
2- 10
3.1.2.2 As applied to natural sands, the
minimum percentages shown above for
material passing the No. 50 and No. .100
sieves may be reduced to 5 and O, respcc-
1
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