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BS EN 12350-7:2019:2022 Edition

BS EN 12350-7:2019:2022 Edition

$142.49

Testing fresh concrete – Air content. Pressure methods

Published By Publication Date Number of Pages
BSI 2022 28
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This document describes two methods for determination of air content of compacted fresh concrete, made with normal weight or relatively dense aggregate and having a declared value of D of the coarsest fraction of aggregates actually used in the concrete (Dmax) not greater than 63 mm. The test is not suitable for concretes with slumps less than 10 mm according to EN 12350-2. Neither method is applicable to concretes made with lightweight aggregates, air cooled blast-furnace slag, or aggregates with high porosity, because of the magnitude of the aggregate correction factor, compared with the entrained air content of the concrete.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
3 Terms and definitions
4 Principles
4.1 General
4.2 Water column method
9 4.3 Pressure gauge method
5 Water column method
5.1 Common apparatus for fresh concrete testing
11 5.2 Procedure
5.2.1 Sampling
5.2.2 Filling the air test container and compacting the concrete
5.2.3 Mechanical vibration
5.2.3.1 Compacting with internal vibrator
12 5.2.3.2 Compacting with vibrating table
5.2.4 Compacting by hand with compacting rod or bar
5.2.5 Measuring air content
6 Pressure gauge method
6.1 Common apparatus for fresh concrete testing
14 6.2 Procedure
6.2.1 Sampling
6.2.2 Filling the air test container and compacting the concrete
15 6.2.3 Mechanical vibration
6.2.3.1 Compacting with internal vibrator
6.2.3.2 Compacting with vibrating table
6.2.4 Compacting by hand with compacting rod or bar
6.2.5 Measuring air content
7 Calculation and expression of results
16 8 Test report
9 Precision
9.1 Water column method
17 9.2 Pressure gauge method
18 Annex A (normative)Aggregate correction factor ā€“ water column method
A.1 General
A.2 Aggregate sample size
A.3 Filling the air test container
19 A.4 Determination of aggregate correction factor
20 Annex B (normative)Aggregate correction factor ā€“ pressure gauge method
B.1 General
B.2 Aggregate sample size
B.3 Filling the air test container
21 B.4 Determination of aggregate correction factor
22 Annex C (normative)Calibration of apparatus ā€“ water column method
C.1 General
C.2 Apparatus
C.3 Capacity of the calibration cylinder
C.4 Capacity of the air test container
23 C.5 Pressure expansion constant, e
C.6 Calibration constant, K
C.7 Required operating pressure
24 C.8 Alternative operating pressure
25 Annex D (normative)Calibration of apparatus ā€“ pressure gauge method
D.1 General
D.2 Apparatus
D.3 Checking the capacity of the air test container
D.4 Checking air content graduations on the pressure gauge

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BS EN 12350-7:2019
$142.49