{"id":203333,"date":"2024-10-19T13:01:26","date_gmt":"2024-10-19T13:01:26","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/astm-c856-c856m-2020\/"},"modified":"2024-10-25T05:38:42","modified_gmt":"2024-10-25T05:38:42","slug":"astm-c856-c856m-2020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/astm\/astm-c856-c856m-2020\/","title":{"rendered":"ASTM-C856\/C856M 2020"},"content":{"rendered":"

ASTM C856\/C856M-20<\/h3>\n

Active Standard: Standard Practice for Petrographic Examination of Hardened Concrete<\/h4>\n
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ASTM C856\/C856M<\/h4>\n

Scope<\/strong><\/p>\n

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1.1<\/span> This practice outlines procedures for the petrographic examination of samples of hardened concrete. The samples examined may be taken from concrete constructions, they may be concrete products or portions thereof, or they may be concrete or mortar specimens that have been exposed in natural environments, or to simulated service conditions, or subjected to laboratory tests. The phrase \u201cconcrete constructions\u201d is intended to include all sorts of objects, units, or structures that have been built of hydraulic cement concrete.<\/p>\n<\/p><\/div>\n

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1.2<\/span> The petrographic procedures outlined herein are applicable to the examination of samples of all types of hardened mixtures, including concrete, mortar, grout, plaster, stucco, terrazzo, and the like. In this practice, the material for examination is designated as \u201cconcrete,\u201d even though the commentary may be applicable to the other mixtures, unless the reference is specifically to media other than concrete.<\/p>\n<\/p><\/div>\n

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1.3<\/span> The purposes of and procedures for petrographic examination of hardened concrete are given in the following sections:<\/p>\n

\n <\/div>\n<\/p><\/div>\n
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1.4<\/span> The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.<\/p>\n

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Note 1:<\/span> Sieve size is identified by its standard designation in Specification E11<\/span>. The alternative designation given in parentheses is for information only and does not represent a different standard sieve size.<\/span><\/p>\n<\/p><\/div>\n<\/p><\/div>\n

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1.5<\/span> This standard does not purport to address all of the safety concerns, if any, associated with its use. 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. A specific hazard statement is given in 6.2.10.1<\/span>.<\/span><\/i><\/p>\n<\/p><\/div>\n

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1.6<\/span> This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.<\/i><\/p>\n<\/p><\/div>\n

Keywords<\/strong><\/p>\n

aggregates; air voids; alkali-silica reaction; analysis; deterioration; examination; fire effects; hardened concrete; microscopy; paste; petrographic; secondary deposits;<\/p>\n

ICS Code<\/strong><\/p>\n

ICS Number Code 91.100.30 (Concrete and concrete products)<\/p>\n

DOI:<\/strong> 10.1520\/C0856_C0856M-20<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

C856\/C856M-20 Standard Practice for Petrographic Examination of Hardened Concrete<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASTM<\/b><\/a><\/td>\n2020<\/td>\n15<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":203339,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1258,2637],"product_tag":[],"class_list":{"0":"post-203333","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-91-100-30","7":"product_cat-astm","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/203333","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/203339"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=203333"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=203333"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=203333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}