ASTM C904-01(2018)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C904 − 01 (Reapproved 2018)
Standard Terminology Relating to
Chemical-Resistant Nonmetallic Materials
This standard is issued under the fixed designation C904; 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 (´) indicates an editorial change since the last revision or reapproval.
acid etch, v—to clean or alter a surface by the application of castable, n—a combination of filler and suitable binder that is
acid. generally poured or compacted into place and which hard-
ens.
adhesion—the physical attraction of two substances, espe-
ciallythemacroscopicallyobservableattractionofdissimilar catalyst—a substance whose presence initiates or changes the
rate of a chemical reaction, but does not itself enter into the
substances.
reaction.
aggregate—any inert material such as sand, gravel, slag,
DISCUSSION—Occasionally used in the vernacular to describe a
carbon, etc., usually consisting of various-sized particles and
setting agent, hardener, curing agent, or promoter, etc.
used with chemical-resistant binders to form chemical-
chemical-resistant—the ability of a material to resist degra-
resistant mortars.
dation by reaction with, dissolution by, or reduction of
back joint—a vertical mortar joint, parallel to the vertical
physical continuity from contact with a chemical agent or
substrate, between a chemical-resistant construction unit and
agents, thereby retaining its capacity to perform as a struc-
a substrate or another chemical-resistant construction unit.
tural or aesthetic entity.
bearing area—for chemical-resistant polymer machinery chemical-resistant carbon brick—a brick comprised of car-
grout, the portion of the grout surface in contact with the bon (including graphite) that is carbon bonded and fired to a
underside of a supported surface. minimum temperature of 1850°F (1010°C). This brick ex-
hibits good resistance to thermal shock and resists exposure
bed joint—a horizontal mortar joint between a chemical-
to a wide range of alkalies and acids, particularly hydroflu-
resistant construction unit and a substrate or another
oric acid. When used in oxidizing conditions, temperature
chemical-resistant construction unit.
exposure should be less than 600°F (315°C).
bend angle—180° minus the internal angle created by apply-
chemical-resistant construction unit—amodularnonmetallic
ing a load on the weld joining two sheets of plastic.
material, either vitreous or nonvitreous, used in industrial
processes primarily for applications where chemical,
binder—a substance used to bond aggregates or fillers, or
thermal, and mechanical resistance is required.
both, into a solid mass.
chemical-resistant fireclay or shale brick—a kiln fired brick
broadcast resin monolithic floor surfacing—a flooring sys-
from clay, shale, or mixtures thereof that exhibits low
tem whereby a film of catalyzed resin binder is applied on a
absorption and high resistance to a wide range of chemical
prepared concrete substrate followed immediately by the
environments.This brick should not be used in hot caustic or
seeding to excess, into this wet film, of a dry inert filler.
where hydrofluoric acid or other fluoride chemical com-
Upon hardening, any unbonded filler is removed. The
pounds are found. Commonly referred to as acid-resistant
application may be repeated once or several times to yield a
brick or acid-proof brick.
greater thickness of surfacing. A top coat may be applied.
chemical-resistant polymer concrete—a construction mate-
butt welding (machine)—the fusing together of two pieces of
rial composed of a continuous phase (binder) of a polymer
plastic which are aligned in the same plane, with the same
and a discontinuous phase (aggregate) generally used in
mating thickness, by application of heat and pressure. Also
applications where chemical resistance is required.
called hot-plate welding.
chemical-resistant resin grout—a mixture of liquid resin,
filler and setting agent. The components form a mixture that
This terminology is under the jurisdiction of ASTM Committee D01 on Paint
subsequently hardens by chemical reaction. The setting
and Related Coatings, Materials, andApplications and is the direct responsibility of
agent may be separate or incorporated in the filler.
Subcommittee D01.46 on Industrial Protective Coatings.
Current edition approved Nov. 1, 2018. Published November 2018. Originally
chemical-resistant polymer machinery grout—an intimate
approved in 1979. Last previous edition approved in 2012 as C904 – 01 (2012).
DOI: 10.1520/C0904-01R18. mixture of liquid resinous material, selected filler materials,
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C904 − 01 (2018)
and setting agent, which harden by chemical reaction to fusion welding—a joining process in which the mating sur-
provide support for machine bases. faces of two thermoplastic parts are melted by induced heat
and rapidly pressed together while still molten to form a
chemical-resistant resin monolithic surfacing—an intimate
homogeneous bond.
mixture of liquid resinous materials, selected filler materials,
head joint—the mortar joint perpendicular to the substrate and
and setting agent. These components are mixed together,
perpendicular to the direction of the course being laid. On a
placed to a minimum thickness of 60 mils (1.5 mm), then
floor it may be called a cross joint.
hardened to form a bonded overlay.
hot-gas welding—a technique for joining thermoplastics (usu-
chemical-resistant resin mortar—an intimate mixture of
ally sheets) in which the materials are first softened by a jet
liquid resinous material, selected filler materials, and setting
of hot gas from a welding gun. A rod of the same plastic is
agent. These components form a trowelable mortar that
used to fill the heated gap and join the sheets at the same
subsequently hardens by chemical reaction.
time pressure is applied by either the rod or the tip of the
chemical-resistant tile grout—an intimate mixture of liquid
gun. Sometimes referred to as string bead welding.
resinous material, selected filler materials, and setting agent.
hot-plate welding—see butt welding (machine).
These components form a flowable mixture that subse-
quently hardens by chemical reaction.
hydraulic mortar—a mortar that is capable of setting and
DISCUSSION—This grout is applied to fill open joints between
hardeningduetotheinteractionofwaterandtheconstituents
chemical-resistant brick or tile.
of the mortar.
chemical setting silicate and silica chemical-resistant
initial setting time—the time interval from the start of mixing
mortar—an intimate mixture of a silicate or silica binder, a
the component parts at a specified temperature, (a) to that
chemically inert solid filler, and a setting agent. The binder
time when a Gillmore needle weighing 1 lb (454 g) and
may be a liquid silicate or silica, or a powder to which water 1 3
having a tip ⁄24 in. (1 mm) in diameter by ⁄16 in. (5 mm)
is added. These components are subsequently hardened by
long will penetrate mortar ⁄8 in. (16 mm) thick to a depth of
the chemical reaction between the setting agent and the 3 1
⁄16 in. (5 mm) in 1 min, or, (b) to that time at which a ⁄4 in.
binder.
(6.4 mm) wide joint of the mortar between bricks is indented
less than ⁄24 in. (1 mm) by a Vicat needle during a 10-min
cohesion—the mutual attraction by which elements of a
period.
substance are held together.
monolithic, n—a material of uniform composition applied as a
compressive strength—the maximum stress that a specimen
continuous surface or structure.
or material will support when subjected to
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