ASTM C1777-15
(Test Method)Standard Test Method for Rapid Determination of the Methylene Blue Value for Fine Aggregate or Mineral Filler Using a Colorimeter
Standard Test Method for Rapid Determination of the Methylene Blue Value for Fine Aggregate or Mineral Filler Using a Colorimeter
SIGNIFICANCE AND USE
5.1 This test method is used to determine rapidly the amount of methylene blue adsorbed by a specimen of fine aggregate or mineral filler. The result is reported as a methylene blue value in units of mg of methylene blue adsorbed per g of fine aggregate or mineral filler. The methylene blue value is a function of the amount and characteristics of clay minerals present in the test specimen. High methylene blue values indicate increased potential for diminished fine aggregate or mineral filler performance in a cementitious mixture due to the presence of clays.
Note 1: Results from this test method are not expected to be correlated with those obtained using AASHTO T 330 or EN 933-9. These three test methods are likely to give very different numerical values even though the units are the same. The AASHTO T 330 test is performed only on the fraction of an aggregate passing the 75 μm sieve, the EN 933-9 test is performed only on the fraction finer than 2 mm, and this test is performed on the fraction finer than the 4.75 mm sieve. Therefore, when testing the same fine aggregate source, the AASHTO test method would give the highest methylene blue value because any clay present in the specimen would be concentrated in the fraction finer than the 75 μm sieve. The AASHTO and EN test methods do not take into account the amount of material passing the 75 μm sieve or 2 mm sieve, respectively. For example, a fine aggregate with high methylene blue value measured by the AASHTO method but low percentage passing the 75 μm sieve may have less effect on concrete performance than a fine aggregate with low methylene blue value measured by the AASHTO method but a high percentage passing the 75 μm sieve. In contrast, this test method expresses methylene blue value based on the entire fine aggregate or mineral filler specimen. Additionally, the AASHTO and EN test methods use titration to determine the amount of methylene blue of known concentration that is adsorbed by a specimen and requ...
SCOPE
1.1 This test method provides a rapid test to determine the amount of methylene blue adsorbed by a specimen of fine aggregate or mineral filler and can be used both in the laboratory and in the field.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: C1777 − 15
Standard Test Method for
Rapid Determination of the Methylene Blue Value for Fine
1
Aggregate or Mineral Filler Using a Colorimeter
This standard is issued under the fixed designation C1777; 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.
4
1. Scope Part 9: Assessment of fines – Methylene blue test
1.1 This test method provides a rapid test to determine the
3. Terminology
amount of methylene blue adsorbed by a specimen of fine
3.1 Definitions:
aggregate or mineral filler and can be used both in the
3.1.1 Fordefinitionsoftermsusedinthisstandard,referto
laboratory and in the field.
Terminology C125.
1.2 The values stated in SI units are to be regarded as
3.2 Definitions of Terms Specific to This Standard:
standard. No other units of measurement are included in this
3.2.1 mineral filler, n—a finely divided mineral product at
standard.
least 65 % of which passes the 75-µm sieve.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 4. Summary of Test Method
responsibility of the user of this standard to establish appro-
4.1 A specimen of fine aggregate or mineral filler is com-
priate safety and health practices and determine the applica-
bined with a methylene blue solution of known concentration
bility of regulatory limitations prior to use.
and mixed for a prescribed period of time. The specimen
adsorbs some of the methylene blue from solution. The
2. Referenced Documents
resultingmixtureisfilteredandaportionofthefilteredsolution
2
isdilutedbyafixedamount.Acolorimeterisusedtodetermine
2.1 ASTM Standards:
the absorbance of the diluted solution, from which the concen-
C125 Terminology Relating to Concrete and Concrete Ag-
tration of methylene blue prior to dilution is calculated. The
gregates
change in concentration of methylene blue before and after
C702 PracticeforReducingSamplesofAggregatetoTesting
mixing with fine aggregate or mineral filler is converted to a
Size
methylene blue value and reported in units of mg/g.
D75 Practice for Sampling Aggregates
E11 Specification for Woven Wire Test Sieve Cloth and Test
5. Significance and Use
Sieves
5.1 Thistestmethodisusedtodeterminerapidlytheamount
2.2 Other Standards:
of methylene blue adsorbed by a specimen of fine aggregate or
AASHTO T330 Standard Method of Test for the Qualitative
mineral filler. The result is reported as a methylene blue value
Detection of Harmful Clays of the Smectite Group in
3 in units of mg of methylene blue adsorbed per g of fine
Aggregates Using Methylene Blue
aggregate or mineral filler. The methylene blue value is a
EN 933-9 Tests for geometrical properties of aggregates.
function of the amount and characteristics of clay minerals
present in the test specimen. High methylene blue values
indicate increased potential for diminished fine aggregate or
1
This test method is under the jurisdiction of ASTM Committee C09 on
mineral filler performance in a cementitious mixture due to the
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
presence of clays.
C09.20 on Normal Weight Aggregates.
Current edition approved Feb. 1, 2015. Published April 2015. Originally
NOTE1—Resultsfromthistestmethodarenotexpectedtobecorrelated
approved in 2013. Last previous edition approved in 2014 as C1777-14. DOI:
with those obtained using AASHTO T 330 or EN 933-9. These three test
10.1520/C1777-15.
methods are likely to give very different numerical values even though the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
units are the same. The AASHTO T 330 test is performed only on the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
fraction of an aggregate passing the 75 µm sieve, the EN 933-9 test is
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3
Available from American Association of State Highway and Transportation
4
Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001, Available from European Committee for Standardization,Avenue Marnix 17,
http://www.transportation.org. B-1000 Brussels, Belgium.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C1777 − 15
performed only on the fraction finer than 2 mm, and this test is performed NOTE 3—Drying by means other than a ventilated oven may be
on the fraction finer than the 4.75 mm sieve. Therefore, when testing the appropriate for field use.
same fine aggregate source,
...
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: C1777 − 14 C1777 − 15
Standard Test Method for
Rapid Determination of the Methylene Blue Value for Fine
1
Aggregate or Mineral Filler Using a Colorimeter
This standard is issued under the fixed designation C1777; 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 test method provides a rapid test to determine the amount of methylene blue adsorbed by a specimen of fine aggregate
or mineral filler and can be used both in the laboratory and in the field.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C125 Terminology Relating to Concrete and Concrete Aggregates
C702 Practice for Reducing Samples of Aggregate to Testing Size
D75 Practice for Sampling Aggregates
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
2.2 Other Standards:
AASHTO T330 Standard Method of Test for the Qualitative Detection of Harmful Clays of the Smectite Group in Aggregates
3
Using Methylene Blue
4
EN 933-9 Tests for geometrical properties of aggregates. Part 9: Assessment of fines – Methylene blue test
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this standard, refer to Terminology C125.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 mineral filler, n—a finely divided mineral product at least 65 % of which passes the 75-μm sieve.
4. Summary of Test Method
4.1 A specimen of fine aggregate or mineral filler is combined with a methylene blue solution of known concentration and mixed
for a prescribed period of time. The specimen adsorbs some of the methylene blue from solution. The resulting mixture is filtered
and a portion of the filtered solution is diluted by a fixed amount. A colorimeter is used to determine the absorbance of the diluted
solution, from which the concentration of methylene blue prior to dilution is calculated. The change in concentration of methylene
blue before and after mixing with fine aggregate or mineral filler is converted to a methylene blue value and reported in units of
mg/g.
1
This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.20 on
Normal Weight Aggregates.
Current edition approved Dec. 15, 2014Feb. 1, 2015. Published January 2015April 2015. Originally approved in 2013. Last previous edition approved in 20132014 as
C1777-13.-14. DOI: 10.1520/C1777-14.10.1520/C1777-15.
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.
3
Available from American Association of State Highway and Transportation Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
http://www.transportation.org.
4
Available from European Committee for Standardization, Avenue Marnix 17, B-1000 Brussels, Belgium.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C1777 − 15
5. Significance and Use
5.1 This test method is used to determine rapidly the amount of methylene blue adsorbed by a specimen of fine aggregate or
mineral filler. The result is reported as a methylene blue value in units of mg of methylene blue adsorbed per g of fine aggregate
or mineral filler. The methylene blue value is a function of the amount and characteristics of clay minerals present in the test
specimen. High methylene blue values indicate increased potential for diminished fine aggregate or mineral filler performance in
a cementitious mixture due to the presence of clays.
NOTE 1—Results from this test method are not expected to be correlated with those obtained using AASHTO T 330 or EN 933-9. These three test
methods are likely to give very different numerical values even though the units ar
...
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