ASTM C25-17 pdf free download.Standard Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime.
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 he left to the discretion of each laboratory.
3. Terminology
3. 1 Defiuzitions:Dcfinitions—Unless otherwise speci fled, for definitions of terms used in these test methods refer to Terminology C51.
4. Significance and Use
4.1 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 he used in relation to specification requirements.
4.2 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 I—These test methods can be applied to other calcareous materials if provisions are made to compensate for known interferences.
5. General Apparatus and Materials and Reagents
5. 1 General Apparatus and Materials:
5.1.1 Balance—The balance shall be of an analytical type with a capacity not to exceed 200 g. It may be of conventional design or it may he a constant-load, direct-reading type.ASTM C25 pdf download.