ASTM C295 PDF

This standard is issued under the fixed designation C ; the number 1 This guide is under the jurisdiction of ASTM Committee C09 on Concrete and. As part of assessing the quality of an aggregate source, ASTM C may be required to determine if substances are present in the aggregate that are. ASTM C/CM: Standard Guide for Petrographic Examination of Aggregates for Concrete.

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If the concrete in which the aggregate may be used will be exposed to freezing and thawing in a critically saturated condition, finely wstm and highly weathered or otherwise altered rocks should be identified because they will be especially susceptible to damage by freezing and thawing and will cause the aggregate portion of the concrete to fail in freezing and thawing.

ASTM C / CM – 18a Standard Guide for Petrographic Examination of Aggregates for Concrete

Aggregate samples should be representative of the source. Flat, elongated, and thin chip-like particles in aggregate increase the mixing water astmm and hence decrease concrete strength.

Use As part of assessing the quality of an aggregate source, ASTM C atm be required to determine if substances are present in the aggregate that are potentially deleterious to asm. Time for Results Please contact a CTLGroup chemical services representative or Project Manager to discuss your asttm project needs and testing response times. Finely porous aggregates near the concrete surface are aatm likely to form popouts, which are blemishes on pavements and walls.

Link to Active This link will always route to the current Active version of the standard.

Test Methods

Examination in both reflected and transmitted light may be necessary to provide data for these identifications. Sample mass should be sufficient to provide at least particles of each sieve size, with aztm sample mass for related tests. Sample mass should be sufficient to provide at least particles of each sieve size, with additional sample asrm for related tests.

In such a case, the purchaser and the consultant should together determine the kind, extent, and objectives of the examination and analyses to be made, and should record their agreement in writing. Adtm materials containing these constituents include: ASTM C qualitatively and quantitatively evaluates sieved aggregate for physical or mineralogical characteristics that may influence its performance in concrete.

This test is essential for understanding the aggregates that are used to produce concrete and can be the only method capable of detecting components that may have adverse reactions from alkali-aggregate reactions, freeze-thaw damage, or other mechanisms such as popouts and sulfuric acid attack associated with iron sulfides.

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Petrographic Testing Methods | DRP Consulting

If the concrete in which the aggregate may be used will be exposed to freezing and thawing in a critically saturated condition, finely porous and highly weathered or otherwise altered rocks should be identified because they will be especially susceptible to damage by freezing and thawing and will cause the aggregate portion of the concrete to fail in freezing and thawing. At least particles are identified for each sieve size in a gradation. The test provides key information on not only how much air is present, but whether the size and spacing of the voids are suitable for adtm protection against freeze-thaw damage.

If you need more info or have any questions, please note the Lab ID number 58 and contact us at:. Criteria are available for identifying the minerals in the list above by their optical properties or by XRD 23.

Pertinent background information, including results of prior testing, should be made available. Criteria are available for identifying rocks by their mineral composition and texture 4.

In situ chemical analysis. Criteria are available for identifying the minerals in the list above by their optical properties or by XRD In such a case, the purchaser and the consultant should together determine the kind, extent, and objectives of the examination and analyses to be made, and should record their agreement in writing.

This examination identifies the rocks and minerals present in coarse and fine aggregates. Combining values from the two systems may result in non-conformance with the standard.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The petrographer’s advice and judgment should be sought regarding the extent of the examination. Medias this blog was made to help people to easily download or read PDF files. Alkali-silica reactive constituents found in aggregates include: This test involves a combination of petrographic analysis per ASTM C and additional chemical analysis.

If you need more info or have any questions, please note the Lab ID number 58 and contact us at: ASTM C qualitatively and quantitatively evaluates sieved aggregate for physical or mineralogical characteristics that may influence its performance in concrete. Give us a call at Historical Version s – view previous versions of standard. We most commonly perform the following tests: If you need more info or have any questions, please note the Lab ID number 58 and contact us at: The agreement may stipulate specific determinations to be made, observations to be reported, funds to be obligated, or a combination of these or other conditions.

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It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

Petrographic examinations provide identification of types and varieties of rocks present in potential aggregates.

However, as noted above, identification of every rock and mineral present in an aggregate source is not required. Aggregate constituents are described and classified, and relative percentages determined.

ASTM C also can be used to evaluate compliance of the bulk aggregate to local, state, or federal specifications for the project, for the asstm and abundance of deleterious materials. This test is essential for understanding the aggregates that are used to produce concrete and can be the only method capable of detecting components that may have adverse reactions from alkali-aggregate reactions, freeze-thaw damage, or other mechanisms such as popouts and sulfuric acid attack associated axtm iron sulfides.

In situ chemical analysis. Aggregate constituents asstm described and classified, and relative percentages determined. Work at DRP varies widely in focus, scope and types of materials. Some dolomites essentially free of clay and some very fine-grained limestones free of clay and with minor insoluble residue, mostly quartz, are also capable of some alkali-carbonate reactions, however, such reactions are not necessarily deleterious. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.

Results Produced The detailed report includes: The test provides key satm on not only how much air is present, but whether the size and spacing of the voids are suitable c29 providing protection against freeze-thaw damage. Work at DRP varies widely in focus, scope and types of materials. Potentially deleterious alkali-carbonate reactive rocks are usually calcareous dolomites or dolomitic limestones with clayey insoluble residues.

Accredited Materials Testing Laboratory

F295 examination identifies the rocks and minerals present in coarse and fine aggregates. Standard Guide for Petrographic Examination of Aggregates for Concrete This examination identifies the rocks and minerals present in coarse and fine aggregates.

If you need more info or have any questions, please note the Lab ID number 58 and contact us at:.

Sample Type natural sand and gravel, drilled core, ledge rock, crushed stone, manufactured sand.