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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's 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.
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:
|Available Lime Index||28|
|Calcium and Magnesium Oxide:|
|Alternative EDTA Titration Method||31|
|Calcium Carbonate Equivalent||33|
|Carbon Dioxide by Standard Method||22|
|Combined Oxides of Iron and Aluminum||12|
|Ferrous Iron||Appendix X5|
|Free Calcium Oxide||Appendix X6|
|Free Moisture in Hydrated Lime||21|
|Free Moisture in Limestone||20|
|Insoluble Matter Including Silicon Dioxide:|
|Optional Perchloric Acid Method||9|
|Insoluble Matter Other Than Silicon Dioxide||11|
|Loss on Ignition||19|
|Bismuthate Method||Appendix X4|
|Periodate (Photometric) Method||27|
|pH Determination of Alkaline Earth Solutions||34|
|Titrimetric Method||Appendix X3|
|Strontium Oxide||Appendix X2|
|Direct Combustion-Thermal Conductivity Cell Method||32|
|Total Carbon and Sulfur:|
|Combustion/Infrared Detection Method||35|
|Standard Method, Potassium Dichromate Titration||13|
|Potassium Permanganate Titration Method||Appendix X1|
|Ortho-Phenanthroline, Photometric Method||14|
|Sodium Carbonate Fusion||24|
|Combustion-Iodate Titration Method||25|
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 9.3, 10.2.1, 18.4.3, 220.127.116.11, X2.3.1, and X18.104.22.168.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C50 Practice for Sampling, Sample Preparation, Packaging, and Marking of Lime and Limestone Products
C51 Terminology Relating to Lime and Limestone (as used by the Industry)
C911 Specification for Quicklime, Hydrated Lime, and Limestone for Selected Chemical and Industrial Uses
D1193 Specification for Reagent Water
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
E70 Test Method for pH of Aqueous Solutions With the Glass Electrode
E173 Practice for Conducting Interlaboratory Studies of Methods for Chemical Analysis of Metals
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E200 Practice for Preparation, Standardization, and Storage of Standard and Reagent Solutions for Chemical Analysis
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E832 Specification for Laboratory Filter Papers
ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)
UNSPSC Code 11111608(Limestone); 30111604(Hydrated lime)