ASTM C25-06

Standard Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime

SIGNIFICANCE AND USE
These test methods provide accurate and reliable analytical procedures to determine the chemical constituents of limestone, quicklime, and hydrated lime (See Note 1). The percentages of specific constituents which determine a material’quality or fitness for use are of significance depending upon the purpose or end use of the material. Results obtained may be used in relation to specification requirements.
Because quicklime and hydrated lime quickly absorb water and carbon dioxide from the air, precision and bias are extremely dependent upon precautions taken during sample preparation and analysis to minimize excessive exposure to ambient conditions.  
Note 1—These test methods can be applied to other calcareous materials if provisions are made to compensate for known interferences.
SCOPE
1.1 These test methods cover the chemical analysis of high-calcium and dolomitic limestone, quicklime, and hydrated lime. These test methods are classified as either standard (preferred) or alternative (optional).
1.2 The standard test methods are those that employ classical gravimetric or volumetric analytical procedures and are typically those required for referee analyses where chemical specification requirements are an essential part of contractual agreement between buyer and seller.
1.3 Alternative or optional test methods are provided for those who wish to use procedures shorter or more convenient than the standard methods for the routine determinations of certain constituents. Optional test methods may sometimes be preferred to the standard test methods, but frequently the use of modern and expensive instrumentation is indicated which may not be accessible to everyone. Therefore, the use of these test methods must be left to the discretion of each laboratory.
1.4 The analytical procedures appear in the following order:
1.5 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. For specific precautionary statements, see , , , , , and .

General Information

• Status: Historical
• Publication Date: 14-Feb-2006
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C07 - Lime and Limestone
• Drafting Committee: C07.05 - Chemical Tests

Relations

• Replaces: ASTM C25-99 - Standard Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime
• Effective Date: 15-Feb-2006
• Referred By: ASTM C602-20 - Standard Specification for Agricultural Liming Materials
• Effective Date: 15-Feb-2006
• Referred By: ASTM C50/C50M-13(2019) - Standard Practice for Sampling, Sample Preparation, Packaging, and Marking of Lime and Limestone Products
• Effective Date: 15-Feb-2006
• Referred By: ASTM C141/C141M-14(2022) - Standard Specification for Hydrated Hydraulic Lime for Structural Purposes
• Effective Date: 15-Feb-2006
• Referred By: ASTM C1875-18 - Standard Practice for Determination of Major and Minor Elements in Aqueous Pore Solutions of Cementitious Pastes by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES)
• Effective Date: 15-Feb-2006
• Referred By: ASTM D5759-12(2020) - Standard Guide for Characterization of Coal Fly Ash and Clean Coal Combustion Fly Ash for Potential Uses
• Effective Date: 15-Feb-2006
• Referred By: ASTM C593-19 - Standard Specification for Fly Ash and Other Pozzolans for Use With Lime for Soil Stabilization
• Effective Date: 15-Feb-2006
• Referred By: ASTM E1266-20 - Standard Practice for Processing Mixtures of Lime, Fly Ash, and Heavy Metal Wastes in Structural Fills and Other Construction Applications
• Effective Date: 15-Feb-2006
• Referred By: ASTM C911-19 - Standard Specification for Quicklime, Hydrated Lime, and Limestone for Selected Chemical and Industrial Uses
• Effective Date: 15-Feb-2006
• Referred By: ASTM D6249-19 - Standard Guide for Alkaline Stabilization of Wastewater Treatment Plant Residuals
• Effective Date: 15-Feb-2006
• Referred By: ASTM C207-18 - Standard Specification for Hydrated Lime for Masonry Purposes
• Effective Date: 15-Feb-2006
• Referred By: ASTM D4373-21 - Standard Test Method for Rapid Determination of Carbonate Content of Soils
• Effective Date: 15-Feb-2006
• Referred By: ASTM C1097-19 - Standard Specification for Hydrated Lime for Use in Asphalt Cement or Bituminous Paving Mixtures
• Effective Date: 15-Feb-2006
• Referred By: ASTM C1707-18 - Standard Specification for Pozzolanic Hydraulic Lime for Structural Purposes
• Effective Date: 15-Feb-2006
• Referred By: ASTM C1164-22 - Standard Practice for Evaluation of Limestone or Lime Uniformity From a Single Source
• Effective Date: 15-Feb-2006

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C25–06
Standard Test Methods for
Chemical Analysis of Limestone, Quicklime, and Hydrated
1
Lime
This standard is issued under the fixed designation C25; 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 Department of Defense.
1. Scope
Magnesium Oxide 18
Manganese:
1.1 These test methods cover the chemical analysis of
Bismuthate Method Appendix X4
high-calcium and dolomitic limestone, quicklime, and hy-
Periodate (Photometric) Method 27
pH Determination of Alkaline Earth Solu- 34
dratedlime.Thesetestmethodsareclassifiedaseitherstandard
tions
(preferred) or alternative (optional).
Phosphorus:
1.2 The standard test methods are those that employ classi-
Titrimetric Method Appendix X3
Molybdovanadate Method 26
cal gravimetric or volumetric analytical procedures and are
Silicon Dioxide 10
typically those required for referee analyses where chemical
Strontium Oxide Appendix X2
specification requirements are an essential part of contractual Sulfur Trioxide 23
Total Carbon:
agreement between buyer and seller.
Direct Combustion-Thermal Conductiv- 32
1.3 Alternative or optional test methods are provided for
ity Cell Method
those who wish to use procedures shorter or more convenient Total Carbon and Sulfur:
Combustion/Infrared Detection Method 35
than the standard methods for the routine determinations of
Total Iron:
certain constituents. Optional test methods may sometimes be
Standard Method, Potassium Dichro- 13
mate Titration
preferredtothestandardtestmethods,butfrequentlytheuseof
Potassium Permanganate Titration Appendix X1
modern and expensive instrumentation is indicated which may
Method
not be accessible to everyone. Therefore, the use of these test
Ortho-Phenanthroline, Photometric 14
Method
methods must be left to the discretion of each laboratory.
Total Sulfur:
1.4 The analytical procedures appear in the following order:
Sodium Carbonate Fusion 24
Section
Combustion-Iodate Titration Method 25
Aluminum Oxide 15
Unhydrated Oxides 30
Available Lime Index 28
1.5 This standard does not purport to address all of the
Calcium and Magnesium Oxide:
Alternative EDTATitration Method 31
safety concerns, if any, associated with its use. It is the
Calcium Carbonate Equivalent 33
responsibility of the user of this standard to establish appro-
Calcium Oxide:
Gravimetric Method 16 priate safety and health practices and determine the applica-
Volumetric Method 17
bility of regulatory limitations prior to use. For specific
Carbon Dioxide by Standard Method 22
precautionary statements, see 9.3, 10.2.1, 18.4.3, 31.6.4.2,
Combined Oxides of Iron and Aluminum 12
Ferrous Iron Appendix X5 X2.3.1, and X5.4.1.1.
Free Calcium Oxide Appendix X6
Free Moisture in Hydrated Lime 21
2. Referenced Documents
Free Moisture in Limestone 20
2
Free Silica 29 2.1 ASTM Standards:
Insoluble Matter Including Silicon Dioxide:
C50 Practice for Sampling, Sample Preparation, Packaging,
Standard Method 8
and Marking of Lime and Limestone Products
Optional Perchloric Acid Method 9
Insoluble Matter Other Than Silicon Diox- 11 C51 Terminology Relating to Lime and Limestone (as used
ide
by the Industry)
Loss on Ignition 19
C911 Specification for Quicklime, Hydrated Lime, and
1
These test methods are under the jurisdiction of ASTM Committee C07 on
2
Lime and are the direct responsibility of Subcommittee C07.05 on Chemical Tests. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Feb. 15, 2006. Published March 2006. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1919. Last previous edition approved in 1999 as C25–99. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C0025-06. the ASTM website.
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