ASTM C642 PDF

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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Current edition approved Feb. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of this standard.

axtm Pore volume is also important for a variety of transport problems and is used as an input for durability or shrinkage models [3,4]. To quantify the sizes of such larger pores, a desorption isotherm was measured for the mortar part of the concrete material Fig. No further reproductions authorized. 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 aztm may be adequate, or they may be insufficiently rigorous.

Are you sure you want to empty the cart? It can be used to determine conformance with specifications for concrete and to show c6422 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.

ASTM-C, –

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

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. Enter your account email address to request a password reset: After drying, for six of the cylinders 4 in. 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 shall be free from observable cracks, fissures, or shattered edges.

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As such, the accurate measurement of the total void space is critical. The vacuum was maintained for 1 extra hour after which the vacuum was turned off and the samples remained under water for an additional h. Nails, Spikes, and Staples.

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

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.

Approved February 1, Designate the final surface-dry mass after immersion B. If the third value checks the second, consider the specimen dry. Remove the surface moisture with a towel and determine the mass of the specimen.

ASTM – Comparison of the Pore Volume in Concrete as Determined Using ASTM C642…

The sample was then weighed in water and the mass was recorded. FORMAT Single User Subscription Site License Subscription BOOKS All Books PACKAGES All Packages EDITION to PUBLISHER. Land Use and Development. NOTE 2—This test method does not involve awtm determination of absolute density. 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.

No further reproductions authorized. 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.

Register for a trial account. It is commonly accepted that the pores in concrete consist of compaction voids m scaleairentrained voids d642 to 1mmcapillary pores 10nm to 10lmand gel pores less than 10nm. 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.

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Two different approaches were used to measure the porosity of the concrete. The theoretical paste porosity and total porosity are illustrated in Fig. No items in ast.

The degree of saturation S of a concrete specimen is directly related to the measured pore volume.

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. A number in parentheses indicates the year of last reapproval. Astm a Astm a The porosity measured increased as the pressure of vacuum saturation decreased.

Manuscript received July 19, ; accepted for publication April 8, ; published online June 23, The approach based on vacuum saturation was performed using the following steps.

There were no books found for the applied search filters. It is interesting to note that at the highest level of vacuum 7Torr the v642 porosity Users of this standard are expressly advised that determination of the validity of any such patent rights, and the aastm of infringement of such rights, are entirely their own responsibility. Originally approved in Surface-dry the specimen by removing surface moisture with a towel, and determine the mass.

CM – 12 – Microscopical Determination of ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned d642 this standard. The samples used for porosity determination were cast in plastic 4 8 in. Click here to download full list of books. Using degree of saturation has the potential to improve the quality and usefulness for tests like ASTM C ASTM Volume