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ASTM C87 – Standard Test Method for Effect of Organic Impurities in Fine Aggregate on Strength of Mortar Description: Significance and Use 5.1 This test method is of significance in making a final determination of the acceptability of fine aggregates with respect to the requirements of Specification C33/C33M concerning organic impurities. 5.2 This test method is applicable to those …
ASTM C865 – Standard Practice for Firing Refractory Concrete Specimens Description: Significance and Use 3.1 This practice is used to standardize the firing conditions of refractory concrete specimens prepared in accordance with Practice C862. The standards are set down to minimize laboratory-to-laboratory variation and do not attempt to duplicate any particular field applications. Scope 1.1 This practice covers …
ASTM C863 – Standard Test Method for Evaluating Oxidation Resistance of Silicon Carbide Refractories at Elevated Temperatures Description: Significance and Use 3.1 The oxidation of silicon carbide refractories at elevated temperatures is an important consideration in the application of these refractories. The product of oxidation is amorphous silica or cristobalite, depending upon the temperature at which …
ASTM C862 – Standard Practice for Preparing Refractory Concrete Specimens by Casting Description: Significance and Use 3.1 This practice is used to standardize mixing, mold conditions, placement, and curing of refractory concrete specimens to be used for testing and evaluation under other test methods. 3.2 This practice standardizes laboratory conditions for producing refractory concrete specimens to minimize …
ASTM C860 – Standard Test Method for Determining the Consistency of Refractory Castable Using the Ball-In-Hand Test Description: Significance and Use 3.1 This test method is used to determine if a freshly mixed refractory castable is of the proper consistency to provide optimum performance. There are times when the manufacturer’s specified water content and consistency will …
ASTM C856 – Standard Practice for Petrographic Examination of Hardened Concrete Description: Abstract This practice outlines the standard procedures for performing petrographic examination of hardened concrete samples. The samples examined may be taken from concrete constructions, that is, all sorts of objects, units, or structures that have been built of hydraulic cement concrete. They may …
ASTM C849 – Standard Test Method for Knoop Indentation Hardness of Ceramic Whitewares Description: Significance and Use 5.1 The Knoop indentation hardness is one of many properties that is used to characterize ceramic whitewares. Attempts have been made to relate Knoop indentation hardness to tensile strength, grinding speeds, and other hardness scales, but no generally accepted …
ASTM C848 – Standard Test Method for Young’s Modulus, Shear Modulus, and Poisson’s Ratio For Ceramic Whitewares by Resonance Description: Significance and Use 3.1 This test system has advantages in certain respects over the use of static loading systems in the measurement of ceramic whitewares. 3.1.1 Only minute stresses are applied to the specimen, thus minimizing the …
ASTM C845 – Standard Specification for Expansive Hydraulic Cement Description: Abstract This specification covers hydraulic cements that expand during the early hardening period after setting. The cement covered by this specification is suitable for use in shrinkage-compensating concrete and shall be designated as Type E-1. Expansive cement shall conform to the requirements as to chemical …
ASTM C838 – Standard Test Method for Bulk Density of As-Manufactured Carbon and Graphite Shapes Description: Significance and Use 4.1 This test method provides a means of determining bulk density on as-manufactured logs, blocks, or shaped articles. 4.2 This test method is suitable for manufacturing control and acceptance specifications. 4.3 Test Method C559 may be used when a higher degree …
