Metallurgy
Metallurgy The nature, crystallography and physical characteristics of the rock guarantee a good response to heating and mechanical strength of the final product
Lime Burners
Lime Burners The severe control of chemical rock composition allows us to respond to your most specific industrial demands, such as the production of quicklime for purification (founding, sugar, water, smoke…), PCC, soil treatments….
Chemistry
Chemistry Use of our products in chemistry as raw material (mineral filler, cement factory, glass works, agriculture).
Public works
Public works A16 – Harbour

The benefit :
Providing all-in ballast 0/90mm unbound mixture aggregate 0/60 mm

Quantities : 75 KT in 2004 and 2005

A86
A86

The benefit :
Providing sand 08/04 mm, fine washed gravel 5/12 mm and 12/20 mm for concrete.

Quantities : 300 KT / year from 1998 to today.

A29
A29

The benefit :
Providing unbound mixture aggregate 0/31.5 mm Type A and unbound mixture aggregate 0/20 mm Type B for road repair, sand and gravel for asphaltic bound mixture.

Quantities : 200 KT /year from 2003 to 2004
Concrete and Precast
Concrete and Precast By their nature, their neatness and their cubic form, the aggregates from Carrières du Boulonnais, dry or washed, offer resistance and an ease of use in ready-mix concrete and precast concrete applications.