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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These notes and footnotes excluding those in tables and figures shall not be considered as requirements of this standard. However, once this critical level of saturation is exceeded in the concrete, the saturated portion of the concrete develops damage progressively on each freezing and thawing cycle.

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.

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.

After drying, for six of the cylinders 4 in. C39M – 16 – Compressive Strength of Cylindrical A number in parentheses indicates the x642 of last reapproval. The vacuum saturation approach resulted in average porosities between Approved February 1, Although different groups are currently considering rapid electrical test methods in potential standardization, tests like ASTM C [2] also rely on the concrete being saturated. Designate the final surface-dry mass after immersion B.

This standard axtm 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. It is interesting to note that at the highest level of vacuum 7Torr the measured porosity Remember me for one month. This is important because this test method is being frequently applied to concrete durability and transport-related problems that require the total pore volume to be known.

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A superscript epsilon indicates an editorial change since the last revision or reapproval.

If the third value checks the second, consider the specimen dry. Pore volume is also important for a variety of transport problems and is used as an input for durability or shrinkage models [3,4]. NOTE 2—This test method does not involve a determination of absolute density. It is the responsibility x642 the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Today, some 12, ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. 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. The accurate measurement of total pore volume, therefore, becomes an important factor that is needed for interpreting other tests performed on concrete.

Please asgm to your asttm staff account to use this feature. The slump of the concrete was 4 in.

ASTM C – Density, absortion and Voids in Hardened Concrete

The samples were then removed and toweled to saturated surface dry at which time their mass was recorded mSS. C [10] as compared with using the vacuum saturation approach for a typical air-entrained INDOT class C bridge deck concrete mixture that was produced using concrete from a ready-mix concrete truck.

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

The porosity measured increased as the pressure of vacuum saturation decreased. Click here to download full list of aastm. The theoretical pore volume porosity of the paste can be considered as the sum of. No further reproductions authorized. Designate the soaked, boiled, surface-dried mass C. Two different approaches were used to measure the porosity of the concrete. If the specimen was comparatively dry when its mass was first determined, and the second mass closely agrees with the first, consider it dry.

ASTM C642 – 13

Originally approved in v642 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. Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C F Standard Specification for Driven Fasteners: A mortar piece was selected 40mg and placed in a highly sensitive, temperature-controlled balance, and mass of specimens were monitored when relative qstm RH of the specimen chamber is reduced from If the difference between values obtained from two successive values of mass exceeds 0.

The theoretical paste porosity and total porosity are illustrated in Fig. If the absolute density were determined and designated g3, then:.

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