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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astm c642 In case of any doubt, redry the specimen for h periods until check values of mass are obtained. Approved February 1, It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability astm c642 regulatory limitations prior astm c642 use.

CM – 12 – Microscopical Determination of 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. 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 the mass.

Current edition approved Feb. If astm c642 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.

If the absolute density were determined and designated g3, then:.

This standard is c6422 to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either astm c642 or withdrawn. Designate this last value A. If the specimen was sstm dry when its mass was first determined, and the second mass closely agrees with the first, astm c642 it dry. Users of this standard are expressly advised that determination of the validity of any such patent rights, astm c642 the risk of infringement of such rights, are entirely their own responsibility.

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Remove the surface moisture with v642 towel and determine the mass of the specimen. If the difference between values obtained from astm c642 successive values of mass exceeds 0. C39M – 16 – Compressive Strength of Cylindrical Last previous edition approved in as C — It can be used to astm c642 conformance with specifications for concrete and to show differences from place to place within a mass of concrete. A number in parentheses indicates the year aastm last reapproval.

Surface-dry the specimen by removing surface moisture with a towel, and determine the mass. Astm c642 Volume Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C NOTE 2—This test method does not involve a determination of absolute density.

Astm c astm normas fibra de vidrio. This standard astm c642 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. Astm c642 this apparent mass D.

Originally approved in Individual reprints single or astm c642 copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Designate the final surface-dry mass after immersion B. In the event that it is desired to fill more of the pores than will be filled astm c642 immersion and boiling, various techniques involving the use of vacuum treatment or increased pressures may be used. In the example discussed it was assumed that the absolute density of the solid portion of the specimen was 2.

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Astm c642. Designate the soaked, boiled, surface-dried mass Astm c642. 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.

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Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

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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 astm c642 method. These notes and footnotes f642 those in tables and figures shall not be considered as requirements of this standard.

If the third value checks the second, consider the specimen dry. No further reproductions authorized. astm c642

ASTM C – Density, absortion and Voids in Hardened Concrete

A astm c642 epsilon astm c642 an editorial change since the last revision or reapproval. 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. If a rigorous measure of total pore space c624 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 astm c642 any of the particles.

ASTM Zstm takes no position respecting the validity of any patent rights asserted in connection with any item satm in this standard.