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Petrographic testing of aggregate

From January 1st 2004 a new series of BS EN Standards were adopted for aggregate testing and the existing British Standards for aggregate testing were withdrawn in June 2004. Geomaterials has fully adopted the latest aggregate standards.

Geomaterials aggregate petrography reports follow in-house procedures that meet and exceed the requirements of BS EN 932-3:1997. Geomaterials can also carry out testing in compliance with BS 812, Part 104 and ASTM C 295. All Geomaterials aggregate reports include a measurement of aggregate grading in accordance with BS EN 933-1. Unless otherwise required, Geomaterials aggregate petrographic examinations are aimed at assessing the suitability of an aggregate sample for its intended use be it in concrete, mortar or asphalt. To meet this objective the testing is always carried out using thin sections and the results of the petrographic examination are interpreted in the light of latest guidance from the Concrete Society (Technical Report No. 30) and the most up to date British Standards and also take into consideration the BRE publication on alkali-aggregate reaction in concrete (BRE Digest 330, 2004).

Thames valley flint gravel

Thames valley flint gravel