This Indian Standard specifies the requirements for the apparatus used to measure the water retentivity of masonry cement. It details the dimensions, materials, and construction of the equipment components, including the perforated test plate, dish, and tamper, to ensure consistency in testing procedures.
Specification for apparatus for measurement of water retentivity of masonry cement
Quick Reference Values
Diameter of perforated brass test plate150 mm
Thickness of test plate1.6 mm
Number of holes in test plate49
Diameter of holes in test plate1.6 mm
Depth of the retaining dish25 mm
Mass of the tamper1 kg
Practical Notes
This standard only specifies the apparatus; the actual test procedure using this equipment is described in IS 1625 (Specification for masonry cement).
Ensuring the perforations in the brass plate are clean and not blocked is crucial for accurate test results.
This apparatus is specific to masonry cement and its ability to retain water, which is a key performance property for mortar and plaster.