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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Designate the final surface-dry mass after immersion B. If you like to setup a quick demo, let us know at support madcad. If the specimen was comparatively dry when its mass was first determined, and the second mass closely agrees with the first, consider it dry. 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

F Standard Specification for Driven Fasteners: ASTM Volume Surface-dry the specimen by removing surface moisture with a towel, and determine the mass. Your comments are invited either for revision asttm this standard or for additional standards and should be addressed to ASTM International Headquarters.

Significance and Use 2. Click here to download full list of books. Approved February 1, The accurate measurement of total pore volume, therefore, becomes an important factor that is needed for interpreting other tests performed on concrete. It is interesting to note that at the highest level of vacuum 7Torr the measured porosity The degree of saturation S of a concrete specimen is directly related to the measured pore volume.

ASTM C Density, Absorption, and Voids in Hardened Concrete | CTLGroup

ASTM Volume It is commonly accepted that the pores in concrete consist of compaction voids m scaleairentrained voids 80lm to 1mmcapillary pores 10nm to 10lmastk gel pores less than 10nm. The theoretical paste porosity and total porosity are illustrated in Fig.

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FORMAT Single User Subscription Site License Subscription BOOKS All Books PACKAGES All Packages EDITION to PUBLISHER. The asfm saturation approach resulted in average porosities between The slump of the concrete was 4 in.

The porosity measured increased as the pressure of vacuum saturation decreased. Juliano row Enviado ast These notes and footnotes excluding those in tables and figures shall not be considered as requirements of this standard. As such, the accurate measurement of the total void space is critical. NOTE 2—This test method does not involve a determination of absolute density.

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

Astm c astm normas fibra de vidrio. Last previous edition approved in as C — In the example discussed it was assumed that the absolute density of the solid portion of the specimen was 2.

Nails, Spikes, and Staples. The samples were then removed and toweled to saturated surface dry at which time their mass was recorded mSS.

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

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. 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. Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C 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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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.

C39M – 16 – Compressive Strength of Cylindrical No further reproductions authorized. Two different approaches were used to measure the porosity of the concrete. 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 absolute density were determined and designated g3, then:. Land Use and Development.

Numerous aspects of concrete performance can be related to the pore structure pore volume and pore size distribution including strength, transport properties, freeze and thaw resistance, and shrinkage. In case of any doubt, redry the specimen for h periods until check values of mass are obtained.

Designate this apparent mass D.

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. Originally approved in Remember me for one month. Manuscript received July 19, ; accepted for publication April 8, ; v642 online June 23, To quantify the sizes of such larger pores, a desorption isotherm was measured for the mortar part of the concrete material Fig.