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Pozzolana Cement Mortar Permeability Apparatus - ASI-639

Pozzolana Cement Mortar Permeability Apparatus - ASI-639

(Three Cell Model)-For water proofing of concrete admixture and special water proof cements are used. Water proofing of these compounds, is established by measuring permeability of standard mortar. Specimen with or without such water proofing compounds. Permeability apparatus is used to determine permeability to water of cement mortar specimens with or without water proofing compound. Specifications: The mortar permeability apparatus comprises three brass/gun-metal cells mounted on a stand and a pressure chamber with a pressure regulator. The cell can accommodate 100 mm dia X 50 mm high specimen. Each cell assembly consists of one base plate. The base plate has one outlet for water and is recessed to hold the specimen in place with a ring washer in between. The top plate has an inlet for water and a suitable connector for the application of pressurized water in the cell. The mould and collar are clamped between the base plate and the top plate with the help of four tension rods and nuts. The cells are mounted on a stand. The pressure chamber is fitted with a pressure regulator which helps in regulating the pressure from 0-7kg/sq.cm The regulator has two pressure gauges, one for indicating the pressure in the chamber (0-10.5kg/sq.cm.) and the other for indicating the testing pressure (0-7kg/sq.cm.). The pressure chamber is connected to the cells with pressure hoses and with couplings. This pressure chamber is fitted with schrader valve. Pressure is applied to the pressure chamber with help of a foot pump and rubber hose which are supplied with the instrument.

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Summary: IS 1727 and IS 2645
Feature IS: 1727 IS: 2645
Standard Title Methods of Test for Pozzolanic Materials Specification for Integral Waterproofing Compounds
Purpose To determine pozzolanic activity and quality of materials like fly ash, calcined clay, etc. To specify requirements for liquid or powder compounds used for waterproofing in concrete/mortar
Key Tests
  • Fineness
  • Lime reactivity
  • Compressive strength
  • Specific surface area
  • Water permeability test
  • Setting time variation
  • Compressive strength of mortar cubes with additive
Material Type Natural or artificial pozzolans Chemical admixtures (liquid/powder form)
Applications Used in cement, concrete & lime-pozzolana mixes for improved strength and durability Used in waterproofing basements, roofs, water tanks, tunnels, etc.
Important Parameters Lime reactivity ≥ 5 N/mm² (at 8 days), Strength activity index ≥ 70% Reduction in water permeability ≥ 50%, Strength not less than 90% of control
Significance Ensures the pozzolanic material is reactive and contributes to long-term strength Ensures compound enhances water resistance without compromising strength
Referenced in IS 1489, IS 3812 (Fly Ash) IS 456, IS 10262 (Concrete mix design)