Testing aggregates - Method for determination of soundnessThis British Standard, a part of the BS 812 series, describes the method for determining the soundness of aggregates by subjecting the aggregate to cycles of immersion in a saturated solution of magnesium sulphate followed by oven drying. The method is applicable to aggregate passing a 14. 0 mm test sieve but is retained on a 10. 0 mm test sieve. For other size fractions, a recommended method is described in appendix A.

Frost resistance is an important parameter for the durability of unbound aggregate and natural stone in a cold environment

• Tests developed for materials other than plastics

washer disinfectors or flushing and steaming of pipelines

resistance to penetration

• Providing valid scientific evidence to demonstrate the ability of the production processes to eliminate or inactivate viruses and/or TSE agents (BS EN ISO 22442-3)

BS EN 12104 provides a classification system based on the intensity of use

Contents of BS 10999:

In order to assess its long term performances

aggregate soundness is crucial for preventing cracks and maintaining structural dimensional stability in order to preserve construction quality

The technical changes as compared to the third edition published in 2013 are:

Recommendations for the design and application of flat roofs with continuously supported roof coverings

Trade associations