ASTM C642 PDF

ASTM C Standard Test Method for Density, Absorption, and Voids in Hardened Concrete. Buy ASTM C TEST METHOD FOR DENSITY, ABSORPTION, AND VOIDS IN HARDENED CONCRETE from SAI Global. Modified Day: ASTM C Standard Test Method for Density, Absorption, and Voids in Hardened Concrete. Lab ID: Use Evaluate products ability to.

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Using degree of saturation has the potential to improve the quality and usefulness for tests like ASTM C Although different groups are currently considering rapid electrical test methods in potential standardization, tests like ASTM C [2] also ashm on the concrete being saturated.

No further reproductions authorized. The samples used for porosity determination were cast in plastic 4 8 satm. The constituent volumes are 6.

In case of any doubt, redry the specimen for h periods until check values of mass are obtained. As such, the accurate measurement of the total void space is critical.

ASTM C – 06 Standard Test Method for Density, Absorption, and Voids in Hardened Concrete

It can be used to determine conformance with specifications for concrete and to show differences from place to place within a mass of concrete. Copyright Compu-tecture, Inc. It is interesting to note that at the highest level of vacuum 7Torr the measured porosity ASTM International takes no position respecting the validity of any patent rights asserted in connection with aztm item mentioned in this standard.

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.

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

If the difference between values obtained from two successive values of mass exceeds 0. A superscript epsilon indicates an editorial change since the last revision or reapproval.

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Remove the surface moisture with a towel and determine the mass of c42 specimen. Astm c astm normas fibra de vidrio. The theoretical pore volume in the concrete can be divided into the aggregate porosity 1. Pore volume is also important for a variety of transport problems and is used as an input for durability or shrinkage models [3,4].

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

Designate this apparent mass D. The purpose of this paper is to bring to the attention of ASTM C users that this might not be a complete measure of the total porosity and as such may not be a measure of complete saturation.

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. C462 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. Enter your personal account email address to request a password reset: 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.

Approved February 1, Sorption was used to estimate pore size distributions by monitoring the desorption behavior of a thin slice from the mortar portion of a concrete specimen. Enter your account email address to request a password reset: Surface-dry the specimen by removing surface moisture with a towel, and determine the mass.

If 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.

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This part of the porosity accounts for A mortar piece was selected 40mg and placed in a highly sensitive, temperature-controlled balance, and mass of specimens were monitored when relative humidity RH of the specimen chamber is reduced from It can be used to determine conformance with specifications for concrete and to show differences from place to place within a mass of concrete.

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. Manuscript received July 19, ; accepted for publication April 8, ; published online June 23, 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.

If the specimen was comparatively dry when its mass was first determined, and the second mass closely agrees with the first, consider it dry.

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.

The individual portions may be pieces of cylinders, cores, or c6422 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 shall be free from observable cracks, fissures, or shattered edges.