Standard Specification for Use of Silica Fume for Use as a Mineral Admixture in Hydraulic-Cement Concrete, Mortar, and Grout

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1.1 This specification covers silica fume for use in concrete and other systems containing hydraulic cement.
1.2 In the cases of slurried or densified silica fume, perform the tests on the raw silica fume from which these products have been made.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 The following safety hazards caveat pertains only to the test methods portions, Sections 10 through 19, of this specification: 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Read the material safety data sheets for materials used.
1.5 The text of this standard references notes and footnotes that provide explanatory information. These notes and footnotes (excluding those in tables) shall not be considered as requirements of this standard.

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09-Aug-2001
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ASTM C1240-01 - Standard Specification for Use of Silica Fume for Use as a Mineral Admixture in Hydraulic-Cement Concrete, Mortar, and Grout
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 1240 – 01
Standard Specification for
Use of Silica Fume as a Mineral Admixture in Hydraulic-
1
Cement Concrete, Mortar, and Grout
This standard is issued under the fixed designation C 1240; 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 (e) indicates an editorial change since the last revision or reapproval.
2
1. Scope * C 219 Terminology Relating to Hydraulic Cement
C 311 Test Methods for Sampling and Testing Fly Ash or
1.1 This specification covers silica fume for use in concrete
Natural Pozzolans for Use as a Mineral Admixture in
and other systems containing hydraulic cement.
3
Portland-Cement Concrete
1.2 In the cases of slurried or densified silica fume, perform
C 430 Test Method for Fineness of Hydraulic Cement by
the tests on the raw silica fume from which these products have
2
the 45-μm (No. 325) Sieve
been made.
C 441 Test Method for Effectiveness of Mineral Admixtures
1.3 The values stated in SI units are to be regarded as the
or Ground Blast-Furnace Slag in Preventing Excessive
standard. The values given in parentheses are for information
3
Expansion of Concrete Due to the Alkali-Silica Reaction
only.
C 670 Practice for Preparing Precision and Bias Statements
1.4 The following safety hazards caveat pertains only to the
3
for Test Methods for Construction Materials
test methods portions, Sections 10-19, of this specification:
C 1005 Specification for Reference Masses and Devices for
This standard does not purport to address all of the safety
Determining Mass and Volume for Use in the Physical
concerns, if any, associated with its use. It is the responsibility
2
Testing of Hydraulic Cements
of the user of this standard to establish appropriate safety and
C 1012 Test Method for Length Change of Hydraulic-
health practices and determine the applicability of regulatory
2
Cement Mortars Exposed to a Sulfate Solution
limitations prior to use. Read the material safety data sheets for
C 1069 Test Method for Specific Surface Area of Alumina
materials used.
4
or Quartz by Nitrogen Adsorption
1.5 The text of this standard references notes and footnotes
2
C 1437 Test Method for Flow of Hydraulic Cement Mortar
that provide explanatory information. These notes and foot-
notes (excluding those in tables) shall not be considered as
3. Terminology
requirements of this standard.
3.1 Definitions:
2. Referenced Documents 3.1.1 silica fume—very fine pozzolanic material, composed
mostly of amorphous silica produced by electric arc furnaces as
2.1 ASTM Standards:
a byproduct of the production of elemental silicon or ferro-
C 109/C 109M Test Method for Compressive Strength of
silicon alloys (also known as condensed silica fume and
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
2
microsilica).
Specimens)
3.1.2 Other terms in this specification are defined in Termi-
C 114 Test Methods for Chemical Analysis of Hydraulic
2 nologies C 125 and C 219.
Cement
C 125 Terminology Relating to Concrete and Concrete
4. Ordering Information
3
Aggregates
4.1 The purchaser shall specify any optional chemical or
C 157 Test Method for Length Change of Hardened
3 physical requirements.
Hydraulic-Cement Mortar and Concrete
C 183 Practice for Sampling and the Amount of Testing of
5. Chemical Composition
2
Hydraulic Cement
5.1 Silica fume shall conform to the requirements for
C 185 Test Method for Air Content of Hydraulic Cement
chemical composition prescribed in Table 1.
2
Mortar
6. Physical Requirements
1
6.1 Silica fume shall conform to the physical requirements
This specification is under the jurisdiction of ASTM Committee C09 on
Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee
prescribed in Table 2. Optional physical requirements are given
C09.24 on Ground Slag and Pozzolanic Admixtures.
in Table 3.
Current edition approved Aug. 10, 2001. Published September 2001. Originally
e1
published as C 1240 – 93. Last previous edition C 1240 – 00 .
2
Annual Book of ASTM Standards, Vol 04.01.
3 4
Annual Book of ASTM Standards, Vol 04.02. Annual Book of ASTM Standards, Vol 15.02.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
C 1240
TABLE 1 Chemical Requirements
7.3.3 When compliance verification tests of silica fume are
SiO , min, % 85.0 required to be made at a laboratory other than that of the
2
Moisture content, max, % 3.0
silic
...

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