ASTM C386 - 93 (2012)

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Designation: C386 −93 (Reapproved 2012)
Standard Practice for
Use of Chemical-Resistant Sulfur Mortar
1
This standard is issued under the ﬁxed designation C386; 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 practice provides detailed information on the
handling, installation, and proper use of chemical-resistant
sulfur mortar such as those covered in Speciﬁcation C287.
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 all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. For speciﬁc safety
precautions, see Section 5.
2. Referenced Documents
2.1 ASTM Standards:
2
C267 Test Methods for Chemical Resistance of Mortars,
Grouts, and Monolithic Surfacings and Polymer Concretes
C287 Speciﬁcation for Chemical-Resistant Sulfur Mortar
C395 Speciﬁcation for Chemical-Resistant Resin Mortars
C399 Practice for Use of Chemical-Resistant Resin Mortars
C904 Terminology Relating to Chemical-Resistant Nonme-
tallic Materials
3. Terminology
3.1 Deﬁnitions—For deﬁnitions of terms used in this
practice, see Terminology C904.
4. Storage
4.1 The sulfur mortar shall be stored in unopened containers
and in a clean, dry place to prevent contamination of the
product. The mortar is not known to deteriorate in storage.
5. Safety Precautions
5.1 Sulfur mortar must be heated and molten in order to be
used.
5.2 Molten sulfur mortar fumes and vapors are irritating to
the eyes and mucuous membranes. Adequate ventilation should
be provided wherever sulfur mortars are used.
5.3 If overheated, sulfur mortar ignites and burns with a
low, blue ﬂame that generates sulfur dioxide. If this should
happen, heating must be stopped and the vessel covered with a
tight-ﬁtting lid to smother the ﬂames.
5.3.1 When using sulfur mortar in a conﬁned area, each pail
of molten material must be checked before entering the area to
ensure that the mortar is not burning.
5.3.2 The areas where the melting and pouring are carried
out must be checked for ﬂammable or explosive gases, and a
ﬂame permit issued, if required, before melting vessel ﬁres are
lit, or the molten sulfur mortar is carried into the area.
5.3.3 Fire extinguishing equipment must be available in
order to prevent ﬂame spread.
5.3.4 Water should not be used to extinguish ignited sulfur.
5.4 All workmen must be equipped with suitable eye
protection and gloves to protect them from spills and splashes
of the molten mortar.
5.4.1 It is recommended that workmen wear ﬂame-retardant
clothing. If combustible clothing is worn, care should be taken
to ensure that it does not contact the ﬂame used for melting the
sulfur mortar.
5.4.2 All surfaces which molten sulfur mortar will contact
must be dry to prevent splattering.
6. Equipment
6.1 Vessel, made of cast iron, steel, or aluminum, for
melting the sulfur mortar. Suitable melting pots may be
available from the sulfur mortar manufacturer.
6.2 Long-Handled Steel Ladle, for dipping and stirring.
6.3 Metal Pails, for transporting and pouring mortar.
NOTE 1—All equipment must be clean and dry.
7. Melting
7.1 Sulfur mortar must be dry at the time of use in order to
prevent foaming.
1
This practice is under the jurisdiction of ASTM Committee C03 on Chemical-
Resistant Nonmetallic Materialsand is the direct responsibility of Subcommittee
C03.02 on Monolithics, Grouts and Polymer Concretes.
Current edition approved Aug. 1, 2012. Published September 2012. Originally
approved in 1956. Last previous edition approved in 2008 as C386 – 93 (2008).
DOI: 10.1520/C0386-93R12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
 

7.2 The ideal temperature range for melting and handling

molten sulfur mortar is from 265 to 290°F (130 to 145°C).

Within this range the mortar is a smooth, free-ﬂowing liquid

with a mirror-bright surface appearance.

7.2.1 If the mortar is maintained below 265°F, some of the

liquid will congeal over the top or around the sides of the

vessel, or both.

7.2.2 If the mortar is heated above 290°F, the mortar

thickens and loses its mirror-bright surface appearance.

7.3 Fill the vessel not more than one-half full of sulfur

mortar.

7.3.1 Heat slowly until the mortar has melted and attained

the appearance described in 7.2.

7.3.2 If congealing occurs, increase the temperature gradu-

ally until it disappears.

7.3.3 If the mortar is overheated, allow the molten material

to cool while stirring frequently. The addition of unmelted

sulfur mortar will facilitate cooling.

8. Laying Brick or Tile

8.1 The brick or tile must be dry and preferably at 65 to

85°F (18 to 29°C).

NOTE 2—For an installation that is to be made under unusual environ-

mental conditions, consult the sulfur mortar manufacturer for assistance

before beginning the application.

8.2 Joint Thickness— Joint thickness should be between

⁄

in. (6 mm) and

⁄

in. (8 mm).

8.2.1 Spacer chips,

⁄

in. (6 to 8 mm) thick, made of

sulfur mortar conforming to Speciﬁcation C287, are available.

8.2.2 Alternatively, wood buttons approximately

⁄

-in. (6-

mm) thick by

⁄

-in. (16-mm) diameter, may be substituted for

the sulfur chips.

8.2.3 Horizontal joints may be formed by resting each brick

or tile on three spacers which are placed in a triangular pattern.

8.2.4 Spacers may also be used to maintain the thickness of

vertical joints.

8.3 Walls with Bed and Joints of Sulfur Mortar—Brick

should be laid running bond (staggered joints). Use muslin or

heavy kraft paper, saturated with sodium silicate solution

(water glass), over the face of the brick or tile to retain the

molten sulfur mortar until it congeals. (If muslin is used, it may

then be stripped, resaturated, and reused.)

8.3.1 Form and pour only one course of brick or tile at a

time.

8.3.2 The pouring containers should be large enough, and

sufficient workmen used, to keep an entire pour ﬂuid.

8.3.3 Fill the vertical joints to within 1 in. (25 mm) of the

top of the course. This will provide a key in the mortar for the

subsequent course.

8.4 Walls with Bed of Sulfur Mortar and Joints of Resin

Mortars—Beginning at a distance between

⁄

in. (6 to 8

mm) away from the vertical substrate, construct a wall with

resin mortar by buttering one long and one short dimension of

the brick.

8.4.1 Lay only one course of brick at a time, and pour the

bed (back) joint with sulfur mortar as described in 8.3 above.

8.4.2 For additional information regarding the selection and

use of resin mortar, see Speciﬁcation C395 and Practice C399.

NOTE 3—When dual cements are used for the walls, the entire ﬂoor is

installed with bed and joints of resin mortars.

8.5 Floors with Sulfur Bed Joint —The ﬂoor shall be given

a skim coat of sulfur mortar prior to installing brick or tile.

8.5.1 The purpose of the skim coat if asphalt membrane is

used is to prevent the brick or tile from forcing spacer chips

into the membrane.

8.5.2 If elastomeric linings are used, the purpose of the

sulfur mortar skim coat is to provide a true plane on top of

which the brick or tile will be subsequently installed.

8.5.3 Brick or tile are laid on three spacer chips to form the

horizontal bed joint with spacing between the brick or tile

maintained at

⁄

in. (6 to 8 mm).

8.5.4 Pour molten sulfur mortar between brick or tile and ﬁll

the vertical joints to

⁄

in. (13 mm) from the top.

8.5.5 After the sulfur mortar has solidiﬁed but is still warm,

ﬁll the balance of the joint by ﬂooding the ﬂoor and squeegee-

ing the molten mortar over the surface of the brick or tile.

Suitable squeegees are box board, ﬁber board, etc.

9. Cleaning Mortar from Brick or Tile

9.1 Various compounds and application methods are avail-

able from mortar manufacturers for masking the brick or tile to

keep sulfur mortar from adhering to them.

10. Curing

10.1 Sulfur mortar congeals in a few minutes and has its full

chemical resistance and about 65 % of its ultimate strength in

30 min at a temperature of 73 64°F (23 62°C). Sulfur mortar

should be allowed to set for 2 h after congealing before placing

in service.

11. Chemical Resistance

11.1 The chemical resistance of sulfur mortars may be

determined by Test Method C267.

11.2 A general guide to chemical resistance of sulfur mor-

tars may be found in Table 1 of Speciﬁcation C287.

12. Service Temperature

12.1 Sulfur mortars should not be used in installations that

will be subjected to temperatures above 190°F (88°C).

13. Keywords

13.1 brick; chemical-resistant; sulfur mortar; tile

C386 − 93 (2012)

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in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk

of infringement of such rights, are entirely their own responsibility.

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if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards

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This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,

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C386 − 93 (2012)

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摘要：

ASTM C386 - 93 (2012) 是ASTM International发布的一项关于石油化工设备隔热材料的标准规范，旨在规定用于高温管道、储罐及其他工业设备隔热层的材料性能、设计指南和施工要求。该标准最初于1993年发布，2012年重新批准，覆盖了诸如隔热砖、纤维毡、泡沫玻璃等材料的热传导率、抗压强度、耐湿性及防火性能等关键指标，同时提供了安装与维护的推荐实践，以确保隔热系统的长期可靠性和能效。对于石化、能源及工程建设行业而言，理解并遵循该标准有助于优化热力损失控制、保障操作安全，并

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ASTM C386 - 93 (2012)

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