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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The samples used for porosity determination were cast in plastic 4 8 in. Remember me for one month. No further reproductions authorized. Astm c astm normas fibra de vidrio.
The porosity measured increased as the pressure of vacuum saturation decreased. Originally approved in If you feel that your comments have not received a fair hearing asfm should make your views known to the ASTM Committee on Standards, at the address shown below.
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.
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. 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.
This standard is subject to revision at any time xstm the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Current edition approved Feb. Designate the final surface-dry mass after immersion B.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Copyright Compu-tecture, Inc. The accurate measurement of total pore volume, therefore, becomes an important factor that is needed for interpreting other tests performed on concrete.
ASTM C642 – 13-Density, absortion and Voids in Hardened Concrete
NOTE 2—This test method does not involve a determination of absolute density. 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 you like to setup a quick demo, let us know at support madcad. 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. C39M – 16 – Compressive Strength of Cylindrical Print 1 2 3 4 5 page sstarting from page current page.
Approved February 1, Enter your personal account email address to request a password reset: F Standard Specification for Driven Fasteners: Designate the soaked, boiled, surface-dried mass C. The slump of the concrete was 4 in. The degree of saturation S of a concrete specimen is directly related to the measured pore volume.
Nails, Spikes, and Staples. If the third value checks the second, consider the specimen dry.
It is commonly accepted that the pores in concrete consist of compaction voids m scaleairentrained voids 80lm to 1mmcapillary pores 10nm to 10lmand gel pores less than 10nm. 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 FORMAT Single User Subscription Site License Subscription BOOKS All Books PACKAGES All Packages EDITION to PUBLISHER.
Using degree of saturation has the potential to improve the quality and usefulness for tests like ASTM C It can be used to determine conformance with specifications for concrete and to show differences from place to place within a mass of concrete. Surface-dry the specimen by removing surface moisture with a towel, and determine the mass.
The vacuum saturation approach resulted in average porosities between In case of any doubt, redry the specimen for h periods until check values of mass are asym. Astm c astm normas fibra de vidrio. Search book title Enter keywords for book title search. Are you sure you want to empty the cart?
ASTM – Comparison of the Pore Volume in Concrete as Determined Using ASTM C
As such, f642 accurate measurement of the total void space is critical. Although tests like water sorption ASTM C  measure the change in mass of a sample as a function of time as water is absorbed, Castro et al.
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.