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NEPLATNÁ ASTM C1040/C1040M-08(2013) 15.11.2013 náhľad

Doplňujúce informácie

ASTM C1040/C1040M-08(2013)

Standard Test Methods for In-Place Density of Unhardened and Hardened Concrete, Including Roller Compacted Concrete, By Nuclear Methods

Automaticky preložený názov:

Štandardné skúšobné metódy pre In-Place Hustota nevytvrdnutej a zatvrdnutého betónu, vrátane kolieskových hutného betónu, jadrovými metódy

NORMA vydaná dňa 15.11.2013

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Informácie o norme:

Označenie normy: ASTM C1040/C1040M-08(2013)
Poznámka: NEPLATNÁ
Dátum vydania normy: 15.11.2013
Kód tovaru: NS-9167
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM

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Kategórie - podobné normy:

Beton. Betonové prefabrikáty

Anotácia textu normy ASTM C1040/C1040M-08(2013) :

Keywords:

acceptance testing, backscatter measurement, concrete-density, density, direct transmission measurement, gamma radiation, in-place density, nuclear testing , roller-compacted concrete, ICS Number Code 91.100.30 (Concrete and concrete products)

Doplňujúce informácie

Significance and Use

3.1 These test methods are useful as rapid, nondestructive techniques for the in-place determination of the density of unhardened concrete. The backscatter test method is also useful for the same purpose on hardened concrete. The fundamental assumptions inherent in the test methods are that Compton scattering is the dominant interaction and that the material under test is homogeneous.

3.2 These test methods are suitable for control and for assisting in acceptance testing during construction, for evaluation of concrete quality subsequent to construction, and for research and development.

3.3 Test results may be affected by reinforcing steel, by the chemical composition of concrete constituents, and by sample heterogeneity. The variations resulting from these influences are minimized by instrument design and by the user's compliance with appropriate sections of the test procedure. Results of tests by the backscatter test method may also be affected by the density of underlying material. The backscatter test method exhibits spatial bias in that the apparatus's sensitivity to the material under it decreases with distance from the surface of the concrete.

1.1 These test methods cover the determination of the in-place density of unhardened and hardened concrete, including roller compacted concrete, by gamma radiation. For notes on the nuclear test see Appendix X1.

1.2 Two test methods are described, as follows:

Section

Test Method A—Direct Transmission
Test Method B—Backscatter

7
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.

2. Referenced Documents

C670-24a	Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials (Includes all amendments and changes 3/11/2024).
C29/C29M-23	Standard Test Method for Bulk Density (“Unit Weight”) and Voids in Aggregate
C125-21a	Standard Terminology Relating to Concrete and Concrete Aggregates (Includes all amendments and changes 10/14/2021).
C138/C138M-23	Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete

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