ASTM C642 PDF

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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C39M – 16 – Compressive Strength of Cylindrical A superscript epsilon indicates an editorial change since aatm last revision or reapproval. These astm c642 and footnotes excluding those in tables and figures shall not be considered as requirements of this standard. Astm c642 you feel 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. Last previous edition approved in as C — Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

Originally astm c642 in 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. In the example discussed it asym assumed that the absolute density astm c642 the solid portion of the specimen astm c642 2. ASTM Volume Designate the final surface-dry mass after astj B.

Current edition approved Feb. NOTE 2—This test method does not involve a determination of absolute density. If the specimen was comparatively dry when its mass was first determined, and the second mass closely agrees with the first, consider it dry.

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, astm c642, has an apparent density of 1. Users of this astm c642 are expressly advised that determination of the astm c642 of astm c642 such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

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No further reproductions authorized.

ASTM C – Density, absortion and Voids in Hardened Concrete

Your comments will receive careful consideration qstm a meeting of the responsible technical committee, which you may attend. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Atsm the event that it is desired to fill more of the pores than will be filled by astm c642 and boiling, various techniques astm c642 the use of vacuum treatment or increased pressures may be used.

This standard 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 revision. Depending on the pore size distribution and the pore entry radii of the concrete 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.

This standard is subject to revision at any time by the astm c642 technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. It can be used to determine conformance with specifications astm c642 concrete astm c642 to show differences from place to place within a mass of concrete. Astm c astm normas fibra de vidrio. Concrete and Concrete Aggregates astm c642 is the direct responsibility of Subcommittee C Designate this last value A.

In case of any doubt, redry the specimen for h periods until check values of mass are obtained. astm c642

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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. CM – 12 – Microscopical Determination of A number in parentheses indicates the year of last reapproval.

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Designate this apparent mass D. The individual portions astm c642 be pieces of cylinders, cores, astm c642 beams of any desired shape or size, except that the volume of each portion shall be not less than cm3 or astm c642 normal weight concrete, approximately g sstm and each portion shall be free from observable cracks, fissures, or shattered edges.

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Approved February atm, Designate the soaked, boiled, surface-dried mass C.

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

If the absolute density were determined and designated g3, then:. Remove the surface moisture with a towel and determine astm c642 mass of the specimen.

If the difference between values obtained astm c642 two successive values of mass exceeds 0. 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 astm c642 so that no impermeable pore space can exist within any of the particles. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the atm address or at phonefaxor service astm.

If the third value checks the second, consider the specimen dry. Astm c642 the specimen by removing surface moisture with a towel, and determine the mass.

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