Silica Standards

1.1 This test method covers a procedure to determine the volatile content of precipitated hydrated silicas. These volatiles are generally excess water adsorbed onto the surface of the silica. This test method does not determine water of hydration of the silica. 1.2 The values...

1.1 This test method is used to determine the electrical conductivity of silica and the electrical conductivity is suitable for characterizing rubber-grade silicas. 1.2 Units-The values stated in SI units are to be regarded as the standard. No other units of measurement are included...

1.1 This test method covers the on-line determination of soluble silica in water by colorimetric analysis using the molybdenum blue method, also known as the heteropoly blue method. 1.2 This test method is applicable for silica determination in water with silica concentrations...

1.1 This test method covers the determination of total silica in water. 1.2 This test method is applicable in the range from 25?μg/L to 250?μg/L of silica as SiO2. Higher concentrations may be determined by decreasing the aliquot volume (see Note 6). Concentration range should not be...

1.1 This specification sets forth the requirements for duplex, types E, J, K, N and T thermocouple wire, insulated with E-glass, S-glass, amorphous silica fiber or polycrystalline fiber. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for...

4.1 This test method provides a means for evaluating the ability of pozzolans and slag cement to control deleterious internal expansion due to alkali-silica reaction when used with an aggregate intended for use in concrete. It is based on the Accelerated Test Method developed at the National...

1.1 This performance specification covers hydraulic cements for both general and special applications. There are no restrictions on the composition of the cement or its constituents (see Note 1). Note 1: There are two related hydraulic cement standards, Specification C150/C150M for portland cement...

1.1 This test method is used to identify and to measure the emissions of volatile organic compounds (VOCs) emitted from samples of cured spray polyurethane foam (SPF) insulation using micro-scale environmental test chambers combined with specific air sampling and analytical methods for VOCs. 1.2...

5.1 This practice may be used to characterize silica or silane in terms of specific properties of the standard compound. This practice is useful for the quality assurance of silica production. It may also be used for the preparation of reference compounds for compounding experiments,...

1.1 This test method is used to determine the number of silanol groups on the surface of silica by titration according to a method as developed by Sears. This test method is suitable for characterizing rubber-grade silicas. 1.2 Units-The values stated in SI units are to be regarded as...

3.1 The presence of certain impurities in silica brick tends to lower their refractoriness and service limits. This classification permits those familiar with refractories to predict the refractoriness of silica brick from their alkali and alumina contents.

1.1 These test methods cover the determination of the compressive strength of chemical-resistant mortars, grouts, monolithic surfacings, and polymer concretes. These materials may be based on resin, silicate, silica, or sulfur binders. 1.2 Test Method A outlines the testing procedure...

1.1 This test method covers the determination of tensile strength of cured chemical-resistant materials in the form of molded briquets. These materials include mortars, brick and tile grouts, machinery grouts, and monolithic surfacings. These materials shall be based on resin, silicate,...

1.1 This test method covers the determination of the absorption of chemical-resistant mortars, grouts, monolithic surfacings, and polymer concretes. These materials may be based on resin, silicate, silica, or sulfur binders. 1.2 Mold Method A is used for systems containing aggregates less...

This specification covers performance requirements for rapid hardening hydraulic cements. There are no restrictions on the compositions of the cement or its constituents. The specification classifies cements by type based on specific requirements for very early compressive strength development. The...

1.1 These test methods cover procedures for the sampling and chemical analysis of inorganic alkaline detergents. 1.2 The procedures appear in the following order: Sections Caustic Soda: ?Sampling 5 ?Total Alkalinity as Sodium Oxide (Na2O) 6 - 8 ?Sodium Hydroxide (NaOH) ?9 - 11 ?Carbonate as Sodium...

1.1 This test method covers the determination of flexural strength and modulus of elasticity in flexure of cured chemical-resistant materials in the form of molded rectangular beams. These materials include mortars, brick and tile grouts, structural grouts, machinery grouts, monolithic surfacings...

3.1 The mullite content of an alumina-silica refractory material has an important influence on volume stability, load-bearing properties, and its satisfactory use in refractory applications. This classification is considered useful for purchase specifications and quality control.

4.1 This practice provides criteria for the verification of the silica sediment removal efficiency of hydrodynamic separators. 4.2 Verification can be used to support certification of the technology within different AHJs provided that: 4.2.1 HDS units are sized using the resulting...

This specification covers the production, properties, packaging, and testing of packaged, dry, combined materials for concrete and mortars. Concrete mixtures covered by this specification includes high-early strength concrete, normal strength concrete, normal weight concrete, high-strength mortar,...