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This specification covers gypsum, calcium sulfate combined with two molecules of water in crystalline form and having the approximate chemical formula CaSO4·2H2O. Physical Properties Size—If necessary, gypsum shall be crushed or ground, or both, to the size specified in the purchase order. Sampling Bulk—When gypsum is shipped in bulk, samples of approximately 5 lb [2 …
ASTM C 20 Apparent Porosity, Water Absorption, Apparent Specific Gravity, and Bulk Density of Burned Refractory Brick and Shapes by Boiling Water These test methods cover the determination of the following properties of burned refractory brick: 1.1.1 Apparent porosity, 1.1.2 Water absorption, 1.1.3 Apparent specific gravity, and 1.1.4 Bulk density. 1.2 These test methods are …
This test method covers the determination of the resistance to deformation or shear of refractory shapes when subjected to a specified compressive load at a specified temperature for a specified time. Significance and Use The ability of refractory shapes to withstand prescribed loads at elevated temperatures is a measure of the high temperature service potential …
ASTM C 16 Standard Test Method for Load Testing Refractory Shapes at High Temperatures Read More »
This covers non reinforced concrete pipe intended to be used for the conveyance of sewage, industrial wastes, storm water, and for the construction of culverts. Classification Pipe manufactured according to this specification shall be of three classes identified as “Class 1 Nonreinforced Concrete Pipe,” “Class 2 Nonreinforced Concrete Pipe,” and “Class 3 Nonreinforced Concrete Pipe.” …
ASTM C 12 : – Standard Practice for Installing Vitrified Clay Pipe Lines This practice covers the proper methods of installing vitrified clay pipe lines by open trench construction methods in order to fully utilize the structural properties of such pipe. DESIGN CONSIDERATIONS 4. Supporting Strength 4.1 The field supporting strength of vitrified clay pipe …
ASTM C 12 : – Standard Practice for Installing Vitrified Clay Pipe Lines Read More »
This standard covers terminology relating to gypsum and related building materials and systems. The terms are generically defined. 3. Terminology Accelerator—a material that reduces setting time. Accessories—products fabricated for the purpose of forming corners, edges, control joints, or decorative effects. Adhesive—a substance capable of holding materials together by surface attachment. Admixture—a material other than …
This specification covers all classes of quicklime such as crushed lime, granular lime, ground lime, lump lime, pebble lime, and pulverized lime, used for structural purposes. X1.1 Introduction X1.1.1 Quicklime can never be used as such for structural purposes; it must always be slaked first. Since the method of slaking is an important factor in …
Standard Specification forClay Drain Tile and Perforated Clay Drain Tile This specification establishes the criteria for acceptance,prior to installation, of drain tile and perforated drain tile to beused for underdrainage, filter fields, leaching fields, and similarsubdrainage installations.
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Recognizing the need is the primary condition for design. Read More »
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We design our world, while our world acts back on us and designs us. Read More »
