ASTM D6023-96

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Designation: D 6023 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Unit Weight, Yield, Cement Content, and Air Content
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(Gravimetric) of Controlled Low Strength Material (CLSM)
This standard is issued under the fixed designation D 6023; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope * D 653 Terminology Relating to Soil, Rock, and Contained
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Fluids
1.1 This test method explains determination of the mass per
D 3740 Practice for Minimum Requirements for Agencies
cubic foot (cubic meter) of freshly mixed Controlled Low
Engaged in the Testing and/or Inspection of Soil and Rock
Strength Material (CLSM) and gives formulas for calculating
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as used in Engineering Design and Construction
the yield, cement content, and the air content of the CLSM.
D 4832 Test Method for Preparation and Testing of Con-
This test method is based on Test Method C 138 for Concrete.
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trolled Low Strength Material (CLSM) Test Cylinders
NOTE 1—Unit Weight is the traditional terminology used to describe the
D 6024 Test Method for the Ball Drop on Controlled Low
property determined by this test method. The proper term is density. It has
Strength Material (CLSM) to Determine Suitability for
also been termed unit mass or bulk density. To be compatible with
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Load Application
terminology used in the concrete industry, unit weight is referenced in this
PS 28 Test Method for Flow Consistency of Controlled
test method.
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Low Strength Material (CLSM)
1.2 The values stated in SI units are to be regarded as
PS 30 Practice for Sampling Freshly Mixed Controlled Low
standard. The inch-pound equivalents are shown for informa-
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Strength Material
tion only.
1.3 CLSM is also known as flowable fill, controlled density
3. Terminology
fill, soil-cement slurry, soil-cement grout, unshrinkable fill,
3.1 Definitions—Except as follows in 3.2, all definitions are
“K-Krete,” and other similar names.
in accordance with Terminology C 125 and D 653.
1.4 This standard does not purport to address all of the
3.1.1 Controlled Low Strength Material (CLSM)—a mixture
safety concerns, if any, associated with its use. It is the
of soil or aggregates, cementitious material, fly ash, water, and
responsibility of the user of this standard to establish appro-
sometimes chemical admixtures, that hardens into a material
priate safety and health practices and determine the applica-
with a higher strength than the soil, but less than 8400 kPa
bility of regulatory limitations prior to use.
(1200 psi).
3.1.1.1 Discussion—Used as a replacement for compacted
2. Referenced Documents
backfill, CLSM can be placed as a slurry, a mortar, or a
2.1 ASTM Standards:
compacted material and typically has strengths of 350 to 700
C 29/C29M Test Method for Unit Weight and Voids in
kPa (50 to 100 psi) for most applications.
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Aggregate
3.1.2 mass, n—the quantity of matter in a body. (See
C 125 Terminology Relating to Concrete and Concrete
weight.)
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Aggregates
3.1.2.1 Discussion—Units of mass are the kilogram (kg),
C 128 Test Method for Specific Gravity and Absorption of
the pound (lb) or units derived from these. Masses are
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Fine Aggregates
compared by weighing the bodies, which amounts to compar-
C 138 Test Method for Unit Weight, Yield and Air Content
ing the forces of gravitation acting on them.
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(Gravimetric) of Concrete
3.1.3 weight, n—the force exerted on a body by gravity. (see
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C 150 Specification for Portland Cement
mass.)
C 231 Test Method for Air Content of Freshly Mixed
3.1.3.1 Discussion—Weight is equal to the mass of the body
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Concrete by the Pressure Method
multiplied by the acceleration due to gravity. Weight may be
expressed in absolute units (newtons, poundals) or in gravita-
tional units (kgf, lbf). Since weight is equal to mass times the
1 acceleration due to gravity, the weight of a body will vary with
This test method is under the jurisdiction of ASTM Committee D-18 on Soil
and Rock and is the direct responsibility of Subcommittee D18.15 on Stabilization the location where the weight is determined, while the mass of
with Admixtures.
Current edition approved Oct. 10, 1996. Published May 1997. Originally
published as PS 29 – 95.
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Annual Book of ASTM Standards, Vol 04.08.
2
Annual Book of ASTM Standards, Vol 04.02.
4
Annual Book of ASTM Standards, Vol 04.09.
*A Summary of Changes section appears at the end of this standard.
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