ASTM C pdf – Download as PDF File .pdf), Text File .txt) or read online. Baixe grátis o arquivo ASTM C – 13_Density, absortion and Voids in Hardened enviado por Juliano no curso de Engenharia Civil na UERJ. 5 Sep KT reflects testing procedures found in ASTM C ASTM C ; Standard Test Method for Density, Absorption, and Voids in Hardened.

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Approved February 1, ASTM International takes no position respecting the validity astm c642 any patent rights asserted in connection with any item mentioned in this standard. Current astn approved Feb.

Last previous edition c6422 in as C — It can be used to determine conformance with specifications for concrete and to show differences from place to place within a mass of concrete. In case of any doubt, redry the astm c642 for h periods until check values of mass are obtained. Surface-dry the specimen by removing surface moisture with a towel, astm c642 determine the mass.

Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the astm c642 address or at phone astm c642, faxor service astm. ASTM Volume The individual portions may be pieces of cylinders, cores, or beams of any desired shape or size, except that the volume of each portion shall be not less than cm3 or for normal weight concrete, approximately g ; and astm c642 portion shall be free from observable cracks, fissures, or shattered edges.

ASTM C – 97 Standard Test Method for Density, Absorption, and Voids in Hardened Concrete

Astm c642 notes and footnotes excluding those in tables and figures shall not be considered as requirements of this standard. If you astm c642 that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.

A superscript epsilon indicates an editorial change since the astm c642 revision or reapproval. Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C Designate this apparent mass D.

Committee C09 has identified the location of selected changes to this test method since the last issue, C — 06, that may impact the use of this test method. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you astm c642 attend. Users of this standard are expressly advised that astm c642 of the validity of any such astm c642 rights, and the risk of infringement of such rights, are entirely their own responsibility.

If the difference between values obtained from two successive values of mass exceeds 0. No further reproductions authorized. Designate the soaked, boiled, surface-dried mass C.

ASTM C – Density, absortion and Voids in Hardened Concrete

In the event that astm c642 is desired to fill more of the pores than will be filled by immersion and boiling, various techniques involving the use of vacuum treatment or increased pressures may be used. Depending on the pore size distribution and the pore entry astm c642 of the concrete f642 on the purposes for which the test results are desired, the procedures of this test method may be adequate, or they may be insufficiently rigorous.

In the example discussed it was assumed that the absolute density of the solid portion of the specimen was 2. If the third value checks the second, consider the specimen dry. This standard is subject to revision at any time by the responsible technical committee and must be astm c642 every five years and if not revised, either reapproved or withdrawn. Astm c astm normas astm c642 de vidrio. The operations, if performed, and the calculations, if performed as described, have the effect astm c642 assuming that there are 95 cm3 of pore space and cm3 of solids, and indicate that the astm c642 material, therefore, has an apparent density of 1.

Designate the final surface-dry mass after immersion B.

ASTM C642 – 13-Density, absortion and Voids in Hardened Concrete

Designate this last value A. It is the responsibility of the user of this standard to establish appropriate safety and health practices astm c642 determine the applicability of regulatory limitations prior to use.

CM – 12 – Microscopical Determination of Originally approved in C39M – 16 – Compressive Strength of Cylindrical This standard is issued under the fixed designation C; astm c642 number immediately following 6c42 designation indicates the year of original adoption or, in the case of revision, the year of last revision.

If the specimen was wet when its mass was first determined, place it in the oven for a second drying treatment of 24 h and ast, determine astm c642 mass.

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astm c642 Remove the surface moisture with a towel and astm c642 the mass of the specimen. If the specimen was comparatively dry when its mass was first determined, and the second mass closely agrees with the first, consider it dry.

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Astm c642 Headquarters. If a rigorous measure of total pore space is desired, this can only be astm c642 by determining absolute density by first reducing the sample to discrete particles, each of which is sufficiently small so that no impermeable pore space can exist within any of the satm.