JIS A 1102 is the Japanese Industrial Standard that specifies the method for testing aggregate sieve analysis. Here’s a detailed breakdown:
Standard Sieve Sizes:
| Sieve Size (mm) | Opening Tolerance |
|---|---|
| 75 | ±2.2 mm |
| 63 | ±1.9 mm |
| 53 | ±1.6 mm |
| 37.5 | ±1.1 mm |
| 26.5 | ±0.8 mm |
| 19 | ±0.6 mm |
| 13.2 | ±0.4 mm |
| 9.5 | ±0.3 mm |
| 4.75 | ±0.15 mm |
| 2.36 | ±0.07 mm |
| 1.18 | ±0.035 mm |
Test Sample Size Requirements:
| Maximum Aggregate Size | Minimum Sample Mass |
|---|---|
| 75 mm | 50 kg |
| 63 mm | 35 kg |
| 37.5 mm | 15 kg |
| 19 mm | 5 kg |
| 9.5 mm | 1 kg |
| 4.75 mm | 0.5 kg |
Testing Procedure Requirements:
| Parameter | Specification |
|---|---|
| Washing Required | For materials finer than 75 μm |
| Drying Temperature | 105-110°C |
| Sieving Time | Until passing material < 0.1% |
| Balance Accuracy | ±0.1% of sample mass |
Reporting Requirements:
| Item | Details Required |
|---|---|
| Sample Mass | Initial dry mass |
| Individual Retained | Mass on each sieve |
| Cumulative Retained | Percentage on each sieve |
| Passing Percentage | For each sieve size |
| Fineness Modulus | When required |
