BS EN 12350-7:2019 – TC:2020 Edition
$176.74
Tracked Changes. Testing fresh concrete – Air content. Pressure methods
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 58 |
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 |
|---|---|
| 32 | undefined |
| 38 | 1 Scope 2 Normative references 3 Terms and definitions 4 Principles 4.1 General 4.2 Water column method |
| 39 | 4.3 Pressure gauge method 5 Water column method 5.1 Common apparatus for fresh concrete testing |
| 41 | 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 |
| 42 | 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 |
| 44 | 6.2 Procedure 6.2.1 Sampling 6.2.2 Filling the air test container and compacting the concrete |
| 45 | 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 |
| 46 | 8 Test report 9 Precision 9.1 Water column method |
| 47 | 9.2 Pressure gauge method |
| 48 | Annex A (normative)Aggregate correction factor – water column method A.1 General A.2 Aggregate sample size A.3 Filling the air test container |
| 49 | A.4 Determination of aggregate correction factor |
| 50 | Annex B (normative)Aggregate correction factor – pressure gauge method B.1 General B.2 Aggregate sample size B.3 Filling the air test container |
| 51 | B.4 Determination of aggregate correction factor |
| 52 | Annex C (normative)Calibration of apparatus – water column method C.1 General C.2 Apparatus C.3 Capacity of the calibration cylinder C.4 Capacity of the air test container |
| 53 | C.5 Pressure expansion constant, e C.6 Calibration constant, K C.7 Required operating pressure |
| 54 | C.8 Alternative operating pressure |
| 55 | Annex D (normative)Calibration of apparatus – 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 |
