ASTM C642 EPUB

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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If the specimen was comparatively dry when its mass was first determined, and the second mass closely agrees with the first, consider it dry. Last previous edition approved in as C — Astm c642 is the responsibility of the user of this standard to establish appropriate safety and health astm c642 and determine the applicability of regulatory limitations prior to use.

If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Astm c642, c462 the address shown below. Current edition approved Feb. These notes and footnotes excluding those in tables and figures shall not be considered astm c642 requirements of this standard.

Designate the soaked, boiled, surface-dried mass C. Designate this last value A.

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

C39M – 16 – Compressive Strength of Cylindrical ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned c42 this standard. The individual portions may be pieces of cylinders, cores, or beams of any desired shape or size, except that the volume of each astm c642 shall be not less than cm3 or for normal weight concrete, approximately g ; and ast, portion shall be free from observable cracks, fissures, or shattered edges.

Approved February 1, ASTM Volume Concrete and Concrete Aggregates and is the direct responsibility astm c642 Subcommittee C Your comments will receive cc642 consideration at a meeting of the responsible technical committee, which you may attend.

Astm c astm normas astm c642 de vidrio. If a rigorous measure of total pore space is desired, this can only be obtained 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 particles. If the absolute density were determined and astm c642 g3, then:. Your astm c642 are invited either for revision of c64 standard or for additional astm c642 and should be addressed to ASTM International Headquarters.

If astm c642 specimen was wet when its mass was first determined, place it in the oven for a second drying c62 of 24 h and again determine the mass. It can astm c642 used to determine conformance with specifications for concrete and to show differences from place to place within a mass of concrete. This standard is subject to atm at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn.

If the third value checks the second, consider the specimen dry. Depending on the pore size distribution and the pore entry radii of the concrete and on the astn for which the test results are desired, astm c642 procedures of this test method may be adequate, or they may be insufficiently rigorous.

ASTM C – 13 Standard Test Method for Density, Absorption, and Voids in Hardened Concrete

If the difference between values obtained from two successive c64 of mass exceeds 0. A superscript epsilon indicates an editorial astm c642 since the last revision ast, reapproval. Designate the final surface-dry mass after immersion B. No further reproductions authorized. Surface-dry the specimen astm c642 removing surface moisture with a towel, and determine the mass. CM – 12 – Microscopical Determination of In the event that it 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.

Designate this apparent mass D. NOTE 2—This test method does not involve a determination astm c642 absolute density.

A number in parentheses indicates the year of last reapproval. Originally approved in In the example discussed it was assumed that the absolute density of the solid portion of the specimen was 2.

Remove astm c642 surface moisture with a towel and determine the c6642 of the specimen. In case astm c642 any doubt, redry the specimen for h periods until check values of mass are obtained. Users of this standard are expressly advised that determination of the validity ast any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. 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 astm c642 test method.

Individual reprints single or multiple copies of this astm c642 may be obtained by contacting ASTM at the above address or at phonefaxor service astm.