ASTM D5095-91(2022)

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: D5095 − 91 (Reapproved 2022)
Standard Test Method for
Determination of the Nonvolatile Content in Silanes,
Siloxanes and Silane-Siloxane Blends Used in Masonry
Water Repellent Treatments
This standard is issued under the fixed designation D5095; 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 3. Summary of Test Method
1.1 This test method describes a procedure for the determi- 3.1 A designated quantity of test material is weighed into a
nation of the nonvolatile content (N ) of silanes, siloxanes, and preweighed aluminum dish containing the catalyst solution,
s
blended silane-siloxane materials used in masonry water repel- mixed, allowed to stand for 60 min at room temperature, and
lent treatments and is applicable to both solvent- and water- then heated in an oven at 110 6 5 °C for 60 min. The
borne materials. nonvolatile content of the test material is calculated by
subtracting the solids of the catalyst solution from the total
1.2 The values stated in SI units are to be regarded as
solids by weight of the test solution.
standard. No other units of measurement are included in this
standard.
4. Significance and Use
1.3 This standard does not purport to address all of the
4.1 This test method is used to determine the nonvolatile
safety concerns, if any, associated with its use. It is the
content of silanes, siloxanes, and silane-siloxane blended
responsibility of the user of this standard to establish appro-
materials used in masonry water-repellent treatments. It can be
priate safety, health, and environmental practices and deter-
used for the purpose of calculating the volatile organic com-
mine the applicability of regulatory limitations prior to use.
pound (VOC) content of these materials under specified test
For a specific hazard statement, see Section 7.
conditions.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
5. Apparatus
ization established in the Decision on Principles for the
5.1 AluminumDishes,58-mmdiameterby18-mmhighwith
Development of International Standards, Guides and Recom-
a smooth (planar) bottom surface. Precondition the dishes for
mendations issued by the World Trade Organization Technical
30 min in an oven at 110 6 5 °C and store in a desiccator prior
Barriers to Trade (TBT) Committee.
to use.
2. Referenced Documents
5.2 ForcedDraftOven,TypeIIAorTypeIIBasspecifiedby
Specification E145.
2.1 ASTM Standards:
D1193 Specification for Reagent Water
5.3 Syringes, 1-mL and 5-mL.
D3980 Practice for Interlaboratory Testing of Paint and
3 5.4 Analytical Balance, capable of weighing to 0.1 mg.
Related Materials (Withdrawn 1998)
E145 Specification for Gravity-Convection and Forced-
6. Reagents
Ventilation Ovens
6.1 Purity of Water—Unless otherwise indicated, references
to water shall be understood to mean reagent water as defined
This test method is under the jurisdiction of ASTM Committee D01 on Paint by Type IV of Specification D1193.
and Related Coatings, Materials, andApplications and is the direct responsibility of
6.2 p-Toluenesulfonic Acid, monohydrate.
Subcommittee D01.47 on Concrete, Stone and Masonry Treatments.
Current edition approved Jan. 1, 2022. Published January 2022. Originally
6.3 Alcohol, technical grade ethanol or isopropanol.
approved in 1990. Last previous edition approved in 2013 as D5095 – 91 (2013).
DOI: 10.1520/D5095-91R22.
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 The sole source of supply of the solution of p-Toluenesulfonic acid known to
Standards volume information, refer to the standard’s Document Summary page on the committee at this time is King Industries, Science Road, Norwalk, CT 06852. If
the ASTM website. you are aware of alternative suppliers, please provide this information to ASTM
The last approved version of this historical standard is referenced on International Headquarters. Your comments will receive careful consideration at a
www.astm.org. meeting of the responsible technical committee, which you may attend.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D5095 − 91 (2022)
7. Hazards 9. Calculation
7.1 In addition to other precautions, provide adequate
9.1 Calculate the nonvolatile matter, N , in the catalyst
c
ventilation, consistent with accepted laboratory practice, to
solution as follows:
limit the accumulation of solvent vapors.
N 5 W 2 W /W (1)
~ !
c 2 1 3
where:
8. Procedure
N = nonvolatile matter of catalyst solution expressed as a
c
8.1 Catalyst Solution—Prepare a catalyst solution contain-
decimal fraction,
ing a mixture of 0.5 % p-Toluenesulfonic acid in either ethanol
W = weight of aluminum dish, g,
or isopropanol.Thoroughly mix the solution. Prepare sufficient
W = weight of dish plus catalyst solution after heating, g,
catalyst solution to perform all tests.
and
8.1.1 The nonvolatile content of the test material can be
W = weight of catalyst solution before heating, g.
calculated only if the same catalyst solution is used t
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