What is BS EN 451‑2 - Fly ash fineness by wet sieving about?

BS EN 451 is a series of the European standard on testing fly ash to improve the quality and durability of concrete products.

BS EN 451‑2 is the second part of the BS EN 451 series of documents that specifies the method for the determination of fly ash fineness by wet sieving on a 0,045 mm sieve.

BS EN 451‑2 specifies the reference procedure. If other methods are used it needs to be shown that they give results equivalent to those obtained by the reference method. In case of a dispute, only the reference method is used.

Who is BS EN 451‑2 - Fly ash fineness by wet sieving for?

BS EN 451‑2 on testing fly ash is useful for:

Manufacturers of concrete and concrete products
Manufacturers and suppliers of sieve

Why should you use BS EN 451‑2 - Fly ash fineness by wet sieving?

The use of fly ash in cement concrete has many benefits and improves concrete performance in both the fresh and hardened states.

BS EN 451‑2 provides the reagents for test and apparatus requirements to test the fineness of fly ash through a sieve frame that is to be constructed of durable material and not susceptible to corrosion or distortion by oven heat.

BS EN 451‑2 specifies the details on checking the test sieve and sieve cloth when new and at intervals not exceeding 100 tests.

Preparation of test sample and test procedure to determine the fly ash fineness by wet sieving on a 0,045 mm sieve.

The calculations and conclusions of the sample's fineness are specified in BS EN 451-2 as well as the repeatability and reproducibility.

Furthermore, BS EN 451-2 can help you determine the fineness of fly ash that is used in concrete that will influence early compressive strength in cement-based materials improving the workability, strength, and durability of hardened concrete while decreasing crack problems and permeability to water and hostile chemicals.

As a result, you get concrete with major environmental benefits, as well as concrete that extends the life of concrete structures by boosting concrete strength and durability.

BS EN 451-2:2017

Method of testing fly ash - Determination of fineness by wet sieving

Current

Published:

30 Jun 2017