ISAT Apparatus AZA 1108 – Surface Absorption Tester
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INITIAL SURFACE ABSORPTION TEST (ISAT) APPARATUS AZA1108

AZA1108 ISAT Apparatus is a precision-engineered testing instrument designed to measure the Initial Surface Absorption of hardened concrete. This test is essential for evaluating the durability of concrete by determining how quickly water penetrates the surface under controlled conditions. The apparatus is widely used in civil engineering laboratories and quality control departments to assess permeability and long-term performance of concrete structures exposed to moisture.

Built with a high-accuracy capillary tube system, the AZA1108 maintains a constant water head over a defined test area and records the volume of water absorbed over specific time intervals — typically at 10, 30, and 60 minutes. The readings obtained help engineers understand the surface porosity of concrete, which is a critical indicator of resistance against weathering, chloride ingress, corrosion of reinforcement, and environmental deterioration.

Designed in compliance with BS 1881-208, this apparatus ensures reliable, repeatable, and standard-compliant results. Its sturdy, rust-proof construction and easy-to-use configuration make it ideal for both routine testing and advanced durability studies in construction material laboratories.

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Description

Description

Key Features

  • Accurate measurement of water absorption rate from concrete surfaces

  • High-precision capillary tube and reservoir system

  • Conforms to BS 1881-208 testing standard

  • Records data at 10, 30, and 60-minute intervals

  • Robust, powder-coated metal frame for long service life

  • Suitable for laboratory and controlled site use

Applications

  • Testing durability of concrete for bridges, marine structures, water tanks, and basements

  • Quality control of precast and ready-mix concrete

  • Research and academic studies on concrete permeability

  • Performance evaluation of surface-treated concrete

Specifications

Specification Details
Model AZA1108
Test Type Initial Surface Absorption Test (ISAT)
Standard Compliance BS 1881-208
Water Head Height Adjustable (typically 200 mm)
Measurement Intervals 10, 30, 60 minutes
Components Included Capillary tube, water reservoir, stand, timer, sealing fittings
Sample Size Typically 150 × 150 mm concrete cubes
Measurement Unit ml/m²/sec
Frame Finish Rust-proof, powder-coated metal
Accuracy High, suitable for durability testing

AZA1108 ISAT Apparatus is a high-precision instrument used to measure the surface water absorption rate of concrete, helping determine durability and permeability as per BS 1881-208 standards. It is ideal for civil engineering and material testing laboratories.

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