ASTM C856/C856M-20

Standard Practice for Petrographic Examination of Hardened Concrete

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STANDARD published on 15.1.2020


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The information about the standard:

Designation standards: ASTM C856/C856M-20
Publication date standards: 15.1.2020
SKU: NS-985163
The number of pages: 15
Approximate weight : 45 g (0.10 lbs)
Country: American technical standard
Category: Technical standards ASTM

The category - similar standards:

Concrete and concrete products

Annotation of standard text ASTM C856/C856M-20 :

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 also be concrete products or portions thereof, or concrete or mortar specimens that have been exposed in natural environments or simulated service conditions, or subjected to laboratory tests. This practice applies to samples of all types of hardened hydraulic-cement mixtures, including concrete, mortar, grout, plaster, stucco, terrazzo, and the like. The equipments generally used for specimen preparation are diamond saw, cutting lubricant, horizontal lap wheels, free abrasive machine, polishing wheel, hot plate or oven, prospector´s pick and/or bricklayer´s hammer, abrasives, plate-glass squares, suitable media, and microscope slides. For specimen examination, the equipments needed are stereomicroscope, dollies, petrographic or polarizing microscope, metallographic microscope, eyepiece micrometer, stage micrometer, microscope lamps, needleholders and points, bottles with droppers, assorted forceps, lens paper, refractometer, and immersion media. Appropriate procedures for the sampling, preparation, and examination of specimens are detailed methodically.


Keywords:
aggregates, air voids, alkali-silica reaction, analysis, deterioration, examination, fire effects, hardened concrete, microscopy, paste, petrographic, secondary deposits,, ICS Number Code 91.100.30 (Concrete and concrete products)

These adjuncts apply to this standard:

ASTM ADJC0856 Adjunct of the standard

Adjunct to C856 Practice for Petrographic Examination of Hardened Concrete

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