Standard Practice for
Preparation of Test Specimens of Asphalt-Stabilized Soils1
This standard is issued under the fixed designation D 4223; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of the last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope *
1.1 This practice covers the selection and proportioning of
soils and emulsified or cutback asphalts and the fabrication of
4-in. (102-mm) diameter by 2.5-in. (54-mm) high test specimens.
1.2 All observed and calculated values shall conform to the
guidelines for significant digits and rounding established in
Practice D 6026.
1.3 The values stated in inch-pound units are to be regarded
as standard, except as noted as follows. The values given in
parentheses are mathematical conversions to SI units, and are
provided for information only and are not considered standard.
1.3.1 The gravitational system of inch-pound units is used
when dealing with inch-pound units. In this system, the pound
(lbf) represents a unit of force (weight), while the unit for mass
1.3.2 The slug unit of mass is almost never used in
commercial practice (density, scales, balances, and so forth).
Therefore, the standard unit for mass in this practice is either
kilogram (kg) or gram (g), or both. Also, the equivalent
inch-pound unit (slug) is not given.
1.3.3 It is common practice in the engineering/construction
profession in the United States to concurrently use pound to
represent both a unit of mass (lbm) and of force (lbf). This use
combines two separate system of units, the absolute system and
the gravitational system. It is scientifically undesirable to
combine the use of two separate sets of inch-pound units within
a single standard. As stated in 1.3.2, this practice uses the
gravitational system and does not present the slug unit for
mass. However, the use of scales or balances recording pounds
of mass (lbm) or the recording of density in lbm/ft3 shall not be
regarded as nonconformance with this practice.
1.4 This practice offers a set of instructions for performing
one or more specific operations. This document cannot replace
education or experience and should be used in conjunction
with professional judgment. Not all aspects of this practice may
be applicable in all circumstances. This ASTM standard is not
intended to represent or replace the standard of care by which
the adequacy of a given professional service must be judged,
nor should this document be applied without consideration of
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