JIS A 1108 is a Japanese Industrial Standard that specifies the method for testing compressive strength of concrete specimens. Here’s a detailed breakdown:
Title: “Method of Test for Compressive Strength of Concrete”
Test Specimen Requirements:
| Parameter | Specification |
|---|---|
| Shape | Cylindrical |
| Standard Size | φ100 × 200mm or φ150 × 300mm |
| Length/Diameter Ratio | 2.0 |
| Tolerance (diameter) | ±2mm |
| Tolerance (length) | ±6mm |
| End Surface Flatness | ≤0.05mm |
Testing Conditions:
| Parameter | Requirement |
|---|---|
| Loading Rate | 0.6 ± 0.4 MPa/sec |
| Temperature | 20 ± 2°C |
| Specimen Age | Usually 28 days |
| Loading Direction | Perpendicular to casting direction |
Calculation:
| Formula | Description |
|---|---|
| fc = P/A | fc: compressive strength (N/mm²) |
| P: maximum load (N) | |
| A: cross-sectional area (mm²) |
Reporting Requirements:
| Item | Details Required |
|---|---|
| Specimen Size | Dimensions and type |
| Age at Testing | Days from casting |
| Maximum Load | In Newtons |
| Compressive Strength | To nearest 0.1 N/mm² |
| Failure Pattern | Description/sketch |
Since this involves technical testing specifications used in civil engineering in Japan, I should note that while I’ve provided typical values, you may want to verify these against official JIS documentation for critical applications.
