ISAT Equipment
Initial Surface Absorption Test Apparatus — Concrete Surface Permeability Testing
GENERAL INFORMATION
| Equipment Name | ISAT Equipment |
|---|---|
| Full Form | Initial Surface Absorption Test Apparatus |
| Application | Determination of the rate of water absorption in concrete surfaces |
| Test Method | Measurement of surface permeability of hardened concrete |
| Standards Compliance | BS 1881: Part 208 – Recommendations for the measurement of surface water absorption of concrete; BS EN 13057 (where applicable) |
EQUIPMENT DESCRIPTION
The ISAT apparatus is used to measure the rate of flow of water into the surface of concrete under a constant head at specified time intervals.
MAIN COMPONENTS
1. ISAT Test Head Assembly
- Transparent cap / cylinder
- Internal diameter: Approx. 50 mm
- Sealing ring: Neoprene rubber gasket
- Clamping frame with tightening screws
2. Water Reservoir System
- Graduated glass capillary tube
- Water column / burette
- Stand with adjustable height
- Constant head arrangement
3. Base Plate / Clamping Frame
- Rigid metallic frame
- Adjustable tightening mechanism
- Leak-proof sealing system
TECHNICAL SPECIFICATIONS
| Test Head Diameter | ~50 mm |
|---|---|
| Water Head | 200 mm (standard) |
| Measurement Intervals | 10 / 30 / 60 / 120 minutes |
| Measurement Unit | ml/m²/sec |
| Capillary Tube Graduation | Fine graduated scale for accurate readings |
CONSTRUCTION DETAILS
| Frame | Powder-coated mild steel |
|---|---|
| Test Cap | Transparent acrylic |
| Seals | Oil- and water-resistant rubber |
| Tubing | Flexible, non-reactive material |
OPERATING PRINCIPLE
- The test head is sealed to the concrete surface
- Water is applied under constant head pressure
- The rate of water absorption is measured by observing the movement of water in the capillary tube over time
SURFACE FINISH & DURABILITY
- Corrosion-resistant structure
- Leak-proof assembly
- Smooth machined contact surface
SAFETY FEATURES
- Stable base stand
- Secure clamping mechanism
- Non-breakable protective housing (optional)
APPLICATION AREAS
- Concrete durability testing laboratories
- Highway and bridge projects
- Precast concrete plants
- Research and quality control laboratories
