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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Standard Guide for Petrographic Examination of Aggregates for Concrete This examination identifies the rocks and minerals present in coarse and fine aggregates. 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.
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. Print and complete the following order form.
Adtm materials containing these constituents include: Criteria are available for identifying rocks by their mineral composition and texture 4. Examination in both reflected and transmitted light may be necessary to provide data for these identifications. The test method is also used for understanding mortar compositions in historical structures where preservation and restoration are the priority. In situ chemical analysis. Aggregate constituents are described and classified, and relative percentages determined.
Petrographic examinations provide identification of types and varieties of rocks present in potential aggregates.
Results Produced The detailed report includes: Historical Version s – view previous versions of standard.
Standard Practice for Petrographic Examination of Hardened Concrete This is the industry standard throughout the astj for investigating a multitude of problems. The employer should tell the petrographer, in as much detail as necessary, the purposes and objectives of the examination, the kind of information needed, and the extent of examination desired.
Finely porous aggregates near the concrete surface are also likely to form popouts, which are blemishes on pavements and walls. Potentially deleterious alkali-carbonate reactive rocks are usually calcareous dolomites or asym limestones with clayey insoluble residues. Order Form 2 Email complete form to c259 listed below. 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.
Historical Version s — view previous versions of standard. Flat, elongated, and thin chip-like particles in aggregate increase the mixing water requirement and hence decrease concrete strength. Sample mass should be sufficient to provide at least particles of each sieve size, with additional sample asrm for related tests.
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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Sample Type natural sand and gravel, drilled core, ledge rock, crushed stone, manufactured sand. At least particles are identified for each sieve size in a gradation.
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.
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 ashm cause the aggregate portion of the concrete to fail in freezing and thawing.
Aggregate materials containing these constituents include: Aggregate samples should be representative of the source. Use 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 potentially deleterious to concrete.
Work at DRP varies widely in focus, scope and types of materials. 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. Standard Practice for Petrographic Examination of Hardened Concrete This is the industry standard throughout the world for investigating a multitude of problems.
Results Produced The detailed report includes: Instructions Detailed report expressing composition and physical characteristics of the aggregate. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
ASTM C – 98 Standard Guide for Petrographic Examination of Aggregates for Concrete
Combining values from the two systems may result in non-conformance with the standard. Axtm Form 2 Email complete form to contact listed below. If you need more info or have any questions, please note the Lab ID number 58 and contact us at:. Print and complete the following order form. Sample mass should be sufficient to provide at least particles of each sieve size, with additional sample mass for related tests.
This is the industry standard throughout the world c259 investigating a multitude of problems. In situ chemical analysis. This is the industry standard throughout the world for investigating a multitude of problems.
ASTM C qualitatively and quantitatively evaluates sieved aggregate for physical or mineralogical characteristics that may influence its performance in concrete. Instructions Detailed report expressing composition and physical characteristics of the aggregate.
Standard Guide for Petrographic Examination of Aggregates for Concrete This examination identifies the rocks and minerals present in coarse and asttm aggregates.
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.
ASTM C also can be used to evaluate compliance of the bulk aggregate to local, state, or federal specifications for the project, for the presence and abundance of deleterious materials. This will ultimately destroy the concrete because such aggregates cannot be protected by adequately air-entrained mortar. At DRP we measure paste and aggregate content in addition to air content, which allows us to trouble-shoot concrete mixtures for strength issues as well as freeze-thaw durability issues.