ASTM C35-01(2019)

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:C35 −01 (Reapproved 2019)
Standard Specification for
Inorganic Aggregates for Use in Gypsum Plaster
This standard is issued under the fixed designation C35; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope C136/C136M Test Method for Sieve Analysis of Fine and
Coarse Aggregates
1.1 This specification covers perlite, vermiculite, natural
C471M Test Methods for ChemicalAnalysis of Gypsum and
and manufactured sand for use as gypsum plaster aggregates.
Gypsum Products (Metric)
1.2 The values stated in inch-pound units are to be regarded
D75/D75M Practice for Sampling Aggregates
as standard. The values given in parentheses are mathematical
E11 Specification for Woven Wire Test Sieve Cloth and Test
conversions to SI units that are provided for information only
Sieves
and are not considered standard.
1.3 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 Definitions shall be in accordance with Terminology
responsibility of the user of this standard to establish appro-
C11.
priate safety, health, and environmental practices and deter-
3.2 Definitions of Terms Specific to This Standard:
mine the applicability of regulatory limitations prior to use.
3.2.1 manufactured sand, n—the fine material resulting
1.4 The text of this specification references notes and
fromthecrushingandclassificationbyscreening,orotherwise,
footnotes that provide explanatory material. These notes and
of rock, gravel, or blast furnace slag.
footnotes (excluding those in tables and figures) shall not be
considered as requirements of the specification.
3.2.2 natural sand, n—the fine granular material resulting
from the natural disintegration of rock or from the crushing of
1.5 This international standard was developed in accor-
friable sandstone.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
3.2.3 perlite aggregate, n—a siliceous volcanic glass ex-
Development of International Standards, Guides and Recom-
panded by heat.
mendations issued by the World Trade Organization Technical
3.2.4 vermiculite aggregate, n—a micaceous mineral ex-
Barriers to Trade (TBT) Committee.
panded by heat.
2. Referenced Documents
4. Chemical Composition
2.1 ASTM Standards:
4.1 Water-soluble impurities in sand shall not exceed 0.15
C11 Terminology Relating to Gypsum and Related Building
weight % and sodium ion content shall not exceed 0.02 weight
Materials and Systems
% when tested in accordance with Section 7.
C29/C29M Test Method for Bulk Density (“Unit Weight”)
and Voids in Aggregate
4.2 Sand shall develop a color no darker than the standard,
C40/C40M Test Method for Organic Impurities in Fine
whensubjectedtothecolorimetrictestfororganicimpuritiesin
Aggregates for Concrete
accordance with Test Method C40/C40M, unless it is estab-
lished by adequate tests that the impurities causing the color
are not harmful in plaster.
This specification is under the jurisdiction of ASTM Committee C11 on
GypsumandRelatedBuildingMaterialsandSystemsandisthedirectresponsibility
5. Mechanical Requirements
of Subcommittee C11.02 on Specifications and Test Methods for Accessories and
Related Products.
5.1 Grading—Shallbeasfollowswhentestedinaccordance
Current edition approved Oct. 1, 2019. Published October 2019. Originally
with Section 7:
approved in 1921. Last previous edition approved in 2014 as C35 – 01 (2014). DOI:
10.1520/C0035-01R19.
5.1.1 Perlite and vermiculite shall be graded within the
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
limits specified in Table 1.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1.2 Natural and Manufactured Sand—Shall be graded
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. withnotmorethan50 %retainedbetweenanytwoconsecutive
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C35−01 (2019)
TABLE 1 Grading Requirements
7.1.13 500 mL Graduated Cylinder.
Percentage Retained on Each Sieve, Cumulative
7.2 Sieve Analysis for Sand—Use Test Method C136/
Perlite, Vermiculite, Sand,
C136M.
Sieve Size
by volume by volume by weight
Max Min Max Min Max Min 7.3 Sieve Analysis for Perlite or Vermiculite—Use Test
Method C136/C136M except as modified as follows:
No. 4 (4.75-mm) 0 . 0 . 0 .
No. 8 (2.36-mm) 5 0 10 0 5 0
7.3.1 Use a specimen of 500 mL bulk volume.
No. 16 (1.18-mm) 60 5 75 40 30 5
7.3.1.1 Measure the volume of each sieve fraction in a
No. 30 (600-µm) 95 45 95 65 65 30
No. 50 (300-µm) 98 75 98 75 95 65 250 mLgraduated cylinder. Pour the specimen loosely into the
No. 100 (150-µm) 100 85 100 90 100 90
graduate without tamping or shaking. Level the surface with a
No. 200 (15-µm) 100 95
spatula and read the volume to within 62 mL.
7.3.2 Express the volumes of the individual sieve fractions
as percentages of the sum of the volumes of all fractions.
sieves shown in Table 1, nor more than 25 % between the
7.3.3 Calculate the cumulative percentages on each desig-
No. 50 (300 µm) and No. 100 (150 µm) sieves.
nated sieve by summing the individual percentages of all
5.2 Density: fractions larger than that sieve.
5.2.1 Perlite shall have a density of not less than 6 nor more
7.4 Density of Lightweight Aggregate— Test Method C29/
3 3
than12lb/ft (96to192kg/m )whentestedinaccordancewith
C29M; use shoveling procedure.
Test Method C29/C29M using the shoveling procedure.
7.5 Water Soluble Impurities of Sand:
5.2.2 Vermiculite shall have a density of not less than 6 nor
3 3
7.5.1 SignificanceandUse—Impuritiescanaffectthesetting
more than 10 lb/ft (96 to 160 kg/m ) when tested in accor-
properties, strength, and bond performance of gypsum plaster.
dance with Test Method C29/C29M using the shoveling
These procedures determine the water soluble impurities of the
procedure.
sand being evaluated.
6. Sampling 7.5.2 Apparatus:
7.5.2.1 Analytical Balance, with a precision of 0.0001 g.
6.1 Apparatus—Suitable thief tube.
7.5.2.2 Balance, capable of weighing at least 10 g to a
6.2 Bulk Aggregate—Obtain specimens of sand in accor-
precision of 0.1 g.
dance with Practice D75/D75M.
7.5.2.3 Desiccator, containing calcium chloride or equiva-
lent desiccant.
6.3 Bagged Aggregate—Obtain from 1 bag randomly se-
lected from each 100 bags but not less than 6 bags from the 7.5.2.4 Drying Oven, capable of being controlled to 250 °F
shipment. For smaller shipments, not less than 6 % of the (121 °C).
number of bags shall constitute the sample. 7.5.2.5 Filter Paper—A “fast” filter paper shall be used.
6.3.1 Secure specimens by inserting a suitable thief tube the 7.5.2.6 Atomic Absorption or Ion Chromatography Equip-
ment.
full d
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