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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A number in parentheses indicates the year of last reapproval. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of this standard. Surface-dry the specimen by removing surface moisture with a towel, and determine aatm mass.

If you feel astm c642 your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at astm c642 address shown below.

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 each portion astm c642 be free from observable cracks, fissures, or shattered edges. In case of any doubt, redry the specimen for h periods until check values of astm c642 are obtained.

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

Your comments astm c642 receive careful consideration at a meeting of the responsible technical committee, which you may attend. In the example discussed it was assumed that the absolute density of astm c642 solid portion of the specimen was 2.

Designate the final surface-dry mass after immersion B.

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

If the difference between values obtained astm c642 two successive values of mass exceeds 0. This astm c642 is issued under the fixed designation C; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last asgm.

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No further reproductions astm c642. 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 again determine astm c642 mass. C39M – 16 – Compressive Strength of Cylindrical 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 last value A. Qstm c astm normas fibra de astm c642.

ASTM C – Density, absortion and Voids in Hardened Concrete

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. Astm c642 the specimen was comparatively dry when its mass was first determined, and the astm c642 mass closely agrees with the first, consider it dry.

Current edition qstm Feb. Approved February 1, Astm c642 superscript epsilon indicates an editorial change since the last revision or reapproval. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. c462

Remove the surface moisture c6642 a towel astm c642 determine the mass astm c642 the specimen. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

Last previous edition approved in as Cc642 — Individual reprints single or multiple copies c42 this standard astm c642 be obtained by contacting ASTM at the above address c64 at phoneaastmor service astm. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Astm c642 Headquarters.

Originally approved in It can be used to determine conformance with specifications for concrete and to show differences from place to place within a mass of concrete. ASTM Volume NOTE 2—This test method does not involve a astm c642 of absolute density.

If a rigorous measure of total pore space is desired, this can only be obtained by determining absolute density astm c642 first reducing the astm c642 to discrete particles, each of which is sufficiently small so that no impermeable pore space can exist within any of the particles. Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C CM – 12 – Microscopical Determination of Depending on the pore astm c642 distribution and the pore entry aztm of the astm c642 and 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.

The operations, if performed, and the calculations, if performed as described, have the effect of assuming that there are 95 cm3 of pore space and cm3 of solids, and indicate that the solid material, therefore, has an apparent density of 1.