ASTM C579-96
(Test Method)Standard Test Methods for Compressive Strength of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings and Polymer Concretes
Standard Test Methods for Compressive Strength of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings and Polymer Concretes
SCOPE
1.1 These test methods cover the determination of the compressive strength of chemical-resistant mortars, grouts, monolithic surfacings, and polymer concretes. These materials may be based on resin, silicate, silica, or sulfur binders.
1.2 Method A outlines the testing procedure generally used for systems containing aggregate less than 0.0625 in. (1.6 mm) in size. Method B covers the testing procedure generally used for systems containing aggregate from 0.0625 to 0.4 in. (1.6 to 10 mm) in size. Method C is used for systems containing aggregate larger than 0.4 in. (1.6 mm).
1.3 these test methods provide two different methods for controlling the testing rate.
1.4 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.5 The values stated in inch-pound units are to be regarded as standard. Within this text, the SI units shown in parentheses are provided for information only.
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Designation: C 579 – 96
Standard Test Methods for
Compressive Strength of Chemical-Resistant Mortars,
Grouts, Monolithic Surfacings, and Polymer Concretes
This standard is issued under the fixed designation C 579; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 4. Significance and Use
1.1 These test methods cover the determination of the 4.1 These test methods offer a means of determining the
compressive strength of chemical-resistant mortars, grouts, compressive strength of chemical-resistant mortars, grouts,
monolithic surfacings, and polymer concretes. These materials monolithic surfacings, and polymer concretes.
may be based on resin, silicate, silica, or sulfur binders.
5. Apparatus
1.2 Test Method A outlines the testing procedure generally
5.1 Equipment, capable of weighing materials or specimens
used for systems containing aggregate less than 0.0625 in. (1.6
mm) in size. Test Method B covers the testing procedure to 60.3 % accuracy.
5.2 Specimen Molds:
generally used for systems containing aggregate from 0.0625
to 0.4 in. (1.6 to 10 mm) in size. Test Method C is used for 5.2.1 Test Method A— These molds shall be right cylinder
1 1
16 ⁄32 in. (256 0.8 mm) in diameter by 1 6 ⁄32 in. high. The
systems containing aggregate larger than 0.4 in.
1.3 These test methods provide two different methods for molds may be constructed in any manner that will allow
formation of a test specimen of the desired size. Typical molds
controlling the testing rate.
1.4 This standard does not purport to address all of the consist of a 1-in. thick, flat plastic sheet in which 1-in.
diameter, smooth-sided holes have been cut, and to the bottom
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- of which a ⁄4-in. (6-mm) thick, flat plastic sheet (without
matching holes) is attached by means of screws or bolts.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Alternately, the molds may consist of sections of round plastic
tubing or pipe, 1-in. inside diameter and 1 in. long, having
1.5 The values stated in inch-pound units are to be regarded
as standard. Within this text, the SI units shown in parentheses sufficient wall thickness to be rigid and retain dimensional
stability during the molding operation, and a ⁄4-in. thick, flat
are provided for information only.
plastic sheet on which one open end of each section can be
2. Referenced Documents
rested. With the latter style of mold, the tubing segment may be
2.1 ASTM Standards: sealed with a material, such as caulking compound or stopcock
C 470 Specifications for Molds for Forming Concrete Test grease. For most types of specimens it is satisfactory to simply
Cylinders Vertically seal one end of the tubing segment with masking tape.
C 904 Terminology Relating to Chemical-Resistant Non-
NOTE 1—For use with sulfur mortars an additional piece of flat plastic
metallic Materials
1 1
sheet at least ⁄8 in. (3 mm) thick containing a ⁄4-in. (6-mm) hole and a
E 4 Practices for Force Verification of Testing Machines
section of plastic tubing or pipe 1 in. (25 mm) in diameter by 1 in. high
are required. They are used to form a pouring gate and reservoir in the
3. Terminology
preparation of sulfur mortar specimens.
3.1 Definitions—For definitions of terms used in these test
5.2.2 Test Method B— Molds for the 2-in. (50-mm) cube
methods, see Terminology C 904.
specimens shall be tight fitting and leakproof. The molds shall
have not more than three cube compartments and shall be
separable into not more than three parts. The parts of the
These test methods are under the jurisdiction of ASTM Committee C-3 on
molds, when assembled, shall be positively held together. The
Chemical-Resistant Nonmetallic Materialsand are the direct responsibility of
molds shall be made of metal not attached by the material. The
Subcommittee C03.01on Test Methods.
sides of the molds shall be sufficiently rigid to prevent
Current edition approved April 10, 1996. Published June 1996. Originally
published as C 579 – 68. Last previous edition C 579 – 91e .
spreading or warping. The interior faces of the molds shall be
Annual Book of ASTM Standards, Vol 04.02.
manufactured to ensure plane surfaces with a permissible
Annual Book of ASTM Standards, Vol 04.05.
4 variation of 0.002 in. (0.05 mm). The distances between
Annual Book of ASTM Standards, Vol 03.01.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
C 579
opposite faces shall be 2 6 ⁄16 in. (50 6 0.8 mm). The height smooth, and normal to each other, they may be sanded, ground,
of the molds, measured separately for each cube compartment, or machined to specification. Exercise care that the frictional
shall be 2 6 ⁄16 in. The angle between adjacent interior faces
heat developed during such operations does not damage the
and between interior faces and top and bottom planes of the specimens.
mold shall be 90 6 0.5° measured at points slightly removed
6.4 Test Method C— Prepare test specimens to be used in
from the intersection of the faces.
accordance with Test Method C as described in 6.6.
5.2.3 Test Method C— Molds shall be right cylinders made
6.4.1 Do not test specimens if any individual diameter of a
of heavy gage metal or other rigid nonabsorbent material. The
cylinder differs from any other diameter of the same cylinder
cylinder diameter shall be at least four times the nominal
by more than 2 %.
maximum aggregate size in the mix. The minimum cylinder
6.4.2 Neither end of compressive test specimens, when
diameter shall be 2 in. (50 mm). The cylinder height shall be
tested, shall depart from perpendicular to the axis by more than
two times the diameter. The plane of the rim of the mold shall
0.5° (approximately equivalent to ⁄8in. in 12 in. (3 mm in 300
be at right angles to the axis within 0.5°. The mold shall be at
mm). Cap the ends of compression test specimens that are not
right angles to the axis within 0.5°. The mold shall not vary
flat within 0.002 in. (0.05 mm) in accordance with 6.6, sawed
from the prescribed diameter by more than ⁄16 in. (1.5 mm) nor
or ground. Determine the diameter used for calculating the
from the prescribed height by more than ⁄8 in. (3 mm). Molds
cross-sectional area of the test specimen to the nearest 0.01 in.
shall be provided with a flat base plate with a means for
(0.25 mm) by averaging two diameters measured at right
securing it to the mold at a right angle to the axis of the
angles to each other at about mid-height of the specimen.
cylinder in the instance of reusable metal molds. For molds
6.5 Specimen Preparation for Test Methods A and B:
other than metal, a mechanically attached smooth flat metal or
integrally molded flat bottom of the same material, as the sides 6.5.1 Resin, Silicate, and Silica Materials—Mix a sufficient
shall be used. Single-use molds shall conform to Specifications
amount of the components in the proportions and in the manner
C 470. specified by the manufacturer of the materials. Fill the molds
one-half full. Remove any entrapped air by using a cutting and
NOTE 2—The material from which the mold is constructed must be
stabbing motion with a spatula or rounded-end rod. Fill the
chemically inert and have antistick properties. Polyethylene, polypropy-
remainder of the mold, working down into the previously
lene, polytetrafluorethylene, and metal forms having either a sintered
coating of tetrafluoroethylene or a suitable release agent compatible with
placed portion. Upon completion of the filling operation, the
the material being tested are satisfactory. Because of their superior heat
tops of the specimens should extend slightly above the tops of
resistance, only trifluorochloroethylene and tetrafluoroethylene mold re-
the molds. When the molds have been filled, strike off the
lease agents should be used with sulfur materials.
excess material, even with the top of the mold. Permit the
5.3 The testing machine may be of any type of sufficient
material to remain in the mold until it has set sufficiently to
capacity which will provide the rates of loading prescribed. It
allow removal without danger of deformation or breakage.
shall have been verified to have an accuracy of 1.0 %, or better,
6.5.1.1 Silicate Materials—Some silicates may require cov-
within twelve months of the time of use in accordance with
ering during the curing period. After removal from the molds,
Practices E 4. The testing machine shall be equipped with two
acid-treat the specimens, if required, in accordance with the
steel bearing blocks with hardened faces, one of which is a
recommendations given by the manufacturer. No other treat-
spherically seated block that will bear on the top bearing plate,
ment shall be permitted. Record the method of treatment in
and the other a plain rigid block that will support the bottom
9.1.8.
bearing plate. The diameter of the spherical bearing block shall
6.5.2 Sulfur Materials:
be at least 75 % of the width of the specimen. The bearing
6.5.2.1 Sulfur Mortars— Slowly melt a minimum of 2 lb
faces shall not depart from a plane by more than 0.001 in.
(900 g) of the material in a suitable container at a temperature
(0.025 mm) in any 6-in. (150-mm) diameter circle.
of 265 to 290°F (130 to 145°C) with constant agitation. Stir to
6. Test Specimens
lift and blend the aggregate without beating air into the melt.
Place the piece of plastic sheet containing the ⁄4-in. (6-mm)
6.1 Make all specimens for a single determination from a
round hole over the open face of the mold with the hole
single mix.
centered on the face. On top of the piece of plastic sheet and
6.2 Test Method A— Prepare test specimens to be used in
surrounding the hole, pl
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