Microfine cement, comprising Portland cement-based grout composed of microfine particles with a specific surface area exceeding 800 m2/kg, exhibits exceptional permeability, strength, and durability. This standard acts as a reference for both users and manufacturers to ascertain compliance with the specified criteria.

Microfine cement, a variant of Portland cement infused with ultrafine particles, finds application in injection processes for loose soils, rocks, and concrete. Its minute particle size enables effortless penetration into narrow joints, crevices, and pore spaces, ensuring the creation of water-tight grouted rock or soil masses. When combined with a water-reducing agent, it becomes a versatile grouting material.

TESTS

The specified tests must be conducted for microfine cement.

• Loss of ignition

• Insoluble residue

• Particle size

• Setting time

• Bleeding test

• Compressive strength

• Fineness

A well-maintained laboratory is essential, where all tests are conducted according to the methods prescribed in the standard.

Microfine Ordinary Portland Cement packaging shall adhere to Clause 9 of IS 16993:2018. It is imperative for manufacturers to demonstrate compliance with this standard. The BIS Standard Mark (ISI Mark) must be visibly imprinted on each bag or drum of Microfine Ordinary Portland Cement, provided the contents meet the specifications. Marking procedures should align with IS 16993:2018 guidelines. Manufacturers are required to obtain a BIS license from the Bureau of Indian Standards to utilize the standard mark (ISI Mark), which is granted upon successful evaluation of manufacturing infrastructure, quality control, testing capabilities, and production processes.

PROCESS FOR BIS ISI MARK CERTIFICATION

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