| Customization: | Available |
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| After-sales Service: | 1year |
| Warranty: | 1year |
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It is suitable for determining the content of needle-like and flake-like particles in coarse aggregates of about 4.75 mm or more used in cement concrete, expressed in percentage.
Only suitable for cement concrete aggregates.
1. Cement Concrete Aggregate Needle Sheet Gauge (Ministry Standard, National Standard)
| Grain size (mm) | 4.75-9.5 | 9.5-16 | 16-19 | 19-26.5 | 26.5-31.5 | 31.5-37.5 |
| The distance between the corresponding uprights on the needle gauge (mm) |
17.1 (B1) |
30.6 (B2) |
42.0 (B3) |
54.6 (B4) |
69.6 (B5) |
82.8 (B6) |
| Corresponding aperture width on sheet collimator (mm) |
2.8 (A1) |
5.1 (A2) |
7.0 (A3) |
9.1 (A4) |
11.6 (A5) |
13.8 (A6) |
2. Applicable test method for determining railway, ballast, needle and flake index
| Grain size (mm) | 22.4-31.5 | 31.5-40 | 40-50 | 50-63 |
| The distance between the corresponding columns of the needle collimator (mm) Total length: 297±0.3 |
Width 48.5/height 34 | Width 64/height 37 | Width 81/height 40 | Width 41/height 45 |
| Corresponding hole width on sheet collimator (mm) Total length: 290±0.5 Thickness: 3mm Overall height: 70mm |
Length: 60±0.5 Width: 16.2 |
Length: 80±0.5 Width: 21.5 |
Length: 93.4 Width: 27 |
Length: 100±0.5 Width: 34 |
3. Used for primary ballast
| Particle size (mm) | 10-16 | 16-25 | 25-35.5 | 35.5-45 | 45-56 | 56-63 |
| Corresponding column spacing of needle gauge (mm) | Width 23±0.3 | Width 37±0.3 | Width 54.5±0.3 | Width 72±0.5 | Width 91±0.5 | Width 42±0.5 |
| Total length 400mm; thickness 8mm | high 30 | high 32 | high 37 | high 37 | high 40 | high 45 |
| Sheet gauge corresponding hole width and length (mm) | width 8 | width 12 | width 18 | width 24 | width 30 | width 36 |
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Total length: 320mm high: 70mm Total width :140mm |
length 30 | length 50 | length 60 | length 80 | length 90 | length 100 |
1. Warranty 1 year of replacement and return.
2. Providing factory visit and study, technical training.
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