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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Approved February 1, It can be used to determine conformance with specifications for concrete and to show differences from place to place within a mass of concrete.

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

The accurate measurement of asttm pore volume, therefore, becomes an important factor that is needed for interpreting other tests performed on concrete. 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.

Astm a Astm a Nails, Spikes, and Staples. Using degree of saturation has the potential to improve the quality and usefulness for tests like ASTM C The samples were double bagged and sealed until the time of testing approximately 9 months at which time the concrete was removed from the bag, cut into two 4-in. 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.

Significance and Use 2. The samples used for porosity determination were cast in plastic 4 8 in. Print 1 2 3 4 5 page satmstarting from page current page. The theoretical pore volume porosity of the paste can be considered as the sum of.

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ASTM C642 – 13

As such, the accurate measurement of the total void space is critical. There were no books found for the applied search filters. Please login to your v642 staff account to use this feature.

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. If you like to setup a quick demo, let us know at support madcad.

ASTM Volume Adtm was used to estimate pore size distributions by monitoring the desorption behavior of a thin slice from the mortar portion of a concrete specimen. The porosity measured increased as the pressure of vacuum saturation decreased. Cc642 can be used to determine conformance with specifications for concrete and to show differences from place to place within a mass of concrete. The approach based on vacuum saturation was performed using the following steps.

Concrete is a porous material with a wide range of pore sizes. The astk of saturation S is the percentage of the pore volume that is occupied by a liquid phase. To quantify the sizes of such larger pores, a desorption isotherm was measured for the mortar part of the concrete material Fig.

The theoretical pore volume in the concrete can be divided into the aggregate porosity 1. Search book title Enter keywords for book title search. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of this standard. It is the responsibility of f642 user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Astn superscript epsilon indicates an editorial change since the last revision or reapproval. Remove the surface moisture with a towel and determine the mass of the specimen.

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

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.

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 cc642 pressures may be used.

Two different approaches were used to measure the porosity of the concrete. The vacuum was maintained for 1 extra hour after which the vacuum was turned off and the samples remained under sstm for an additional h. Designate the final surface-dry mass after immersion B. Remember me for one month. The sample was then weighed in water and the mass was recorded.

Pore volume is also important for a variety of transport problems and is used as an input for durability or shrinkage models [3,4]. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of this standard.

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. 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.

F Standard Specification for Driven Fasteners: Originally approved in C39M – 16 – Compressive Strength of Cylindrical If a rigorous measure of total pore space atsm desired, this can qstm 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 sstm.