ASTM C1655-06(2016)
(Classification)Standard Classification of Fireclay and High-Alumina Mortars
Standard Classification of Fireclay and High-Alumina Mortars
SIGNIFICANCE AND USE
3.1 Refractory mortars are used for laying, bonding and coating refractory brick. They become an integral part of the resulting refractory lining or structure. Therefore, such mortars should be selected in order to closely match those of the brick. A classification system is provided for use in producing, purchasing and using different types of refractory mortars.
SCOPE
1.1 This classification pertains to fireclay and high-alumina refractory mortars that can be trowelled, dipped or painted to join or coat refractory bricks and shapes.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address 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.
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Designation:C1655 −06 (Reapproved 2016)
Standard Classification of
Fireclay and High-Alumina Mortars
This standard is issued under the fixed designation C1655; 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.
1. Scope 4.2 Air-Setting Mortars – This class initially hardens at
ambient temperatures in contact with air and forms a strong
1.1 This classification pertains to fireclay and high-alumina
bond upon drying at 230 °F (110 °C).
refractory mortars that can be trowelled, dipped or painted to
join or coat refractory bricks and shapes.
4.3 Chemically Bonded Mortars – Mortars in this class
cannot be said to truly airset, since they require some heating
1.2 The values stated in inch-pound units are to be regarded
to initiate hardening. However, they harden at temperatures
as standard. The values given in parentheses are mathematical
lower than those required for ceramic bonding. A common
conversions to SI units that are provided for information only
example of a chemically bonded mortar is a phosphate-bonded
and are not considered standard.
mortar.
1.3 This standard does not purport to address safety
concerns, if any, associated with its use. It is the responsibility
4.4 Each of the above classes of mortar are further classified
of the user of this standard to establish appropriate safety and
by the condition in which they are supplied:
health practices and determine the applicability of regulatory
4.4.1 Dry Mortars – This class is supplied dry and must be
limitations prior to use.
mixed with water prior to use.
4.4.2 WetMortars – Thisclassissuppliedinareadyforuse.
2. Referenced Documents
4.5 The above classes of mortars are further classified for
2.1 ASTM Standards:
usage with a particular type of brick as prescribed in Table 1.
C27 Classification of Fireclay and High-Alumina Refractory
Brick
5. Test Methods
C199 Test Method for Pier Test for Refractory Mortars
5.1 The properties enumerated in this classification shall be
3. Significance and Use
determined in accordance with the following ASTM test
3.1 Refractory mortars are used for laying, bonding and
methods:
coating refractory brick. They become an integral part of the
5.1.1 Pier Test – Test Method C199. For medium-duty,
resulting refractory lining or structure. Therefore, such mortars
high-duty, super-duty and high-alumina mortar classes test
should be selected in order to closely match those of the brick.
with appropriate brick that meet requirements specified in Test
A classification system is provided for use in producing,
Method C199. For high-alumina mortars in the 80 %, 85 %,
purchasing and using different types of refractory mortars.
90 %, and 99 % classes test with high-alumina brick from the
appropriate class meeting the requirements specified in Clas-
4. Basis of Classification
sification C27.
4.1 Heat-Setting Mortars – This class hardens at elevated
5.1.2 Alumina Content – XRF and ICP after calcining to
temperature by forming a ceramic bond. The minimum tem-
1830 °F (1000 °C).
perature required for forming the ceramic bond is usually at
least 2000 °F (1095 °C).
6. Retests
6.1 Because of possible variables
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1655 − 06 (Reapproved 2011) C1655 − 06 (Reapproved 2016)
Standard Classification of
Fireclay and High-Alumina Mortars
This standard is issued under the fixed designation C1655; 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.
1. Scope
1.1 This classification pertains to fireclay and high-alumina refractory mortars that can be trowelled, dipped or painted to join
or coat refractory bricks and shapes.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address 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.
2. Referenced Documents
2.1 ASTM Standards:
C199 Test Method for Pier Test for Refractory Mortars
C27 Classification of Fireclay and High-Alumina Refractory Brick
3. Significance and Use
3.1 Refractory mortars are used for laying, bonding and coating refractory brick. They become an integral part of the resulting
refractory lining or structure. Therefore, such mortars should be selected in order to closely match those of the brick. A
classification system is provided for use in producing, purchasing and using different types of refractory mortars.
4. Basis of Classification
4.1 Heat-Setting Mortars – This class hardens at elevated temperature by forming a ceramic bond. The minimum temperature
required for forming the ceramic bond is usually at least 2000 °F (1095 °C).
4.2 Air-Setting Mortars – This class initially hardens at ambient temperatures in contact with air and forms a strong bond upon
drying at 230 °F (110 °C).
4.3 Chemically Bonded Mortars – Mortars in this class cannot be said to truly airset, since they require some heating to initiate
hardening. However, they harden at temperatures lower than those required for ceramic bonding. A common example of a
chemically bonded mortar is a phosphate-bonded mortar.
4.4 Each of the above classes of mortar are further classified by the condition in which they are supplied:
4.4.1 Dry Mortars – This class is supplied dry and must be mixed with water prior to use.
4.4.2 Wet Mortars – This class is supplied in a ready for use.
4.5 The above classes of mortars are further classified for usage with a particular type of brick as prescribed in Table 1.
5. Test Methods
5.1 The properties enumerated in this classification shall be determined in accordance with the following ASTM test methods:
This practice is under the jurisdiction of ASTM Committee C08 on Refractories and is the direct responsibility of Subcommittee C08.92 on The Joseph E. Kopanda
Subcommittee for Editorial, Terminology and Classification.
Current edition approved July 1, 2011June 1, 2016. Published July 2011June 2016. Originally approved in 1976. Last previous edition approved in
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