From Marbres du Boulonnais to CB Group


Birth of the CB Group’s aggregates business in the North of France with the artisanal operation of a marble quarry that in 1917 became the Marbes du Boulonnais company run by Auguste Poulain.

Construction of a rock crushing unit that marked the move to an industrial activity with the extraction, manufacture and sale of aggregates.

With the opening of the Usinor site (Sacilor, Sallac then ArcelorMittal) in Dunkirk, Carrières du Boulonnais underwent its first major development. 

The company Marbres du Boulonnais is renamed Carrières du Boulonnais. A second major development was marked by substantial investment : the Ferques site is linked to the railroad network and a material washing plant dedicated to products for the Concrete industry was set up. 

Birth of the Group and first development in the Ready-Mix Concrete. Launch of a trading business for ornemental stones with the opening of an agency in the USA. 

The Group carried out its first major aggregates acquisition when it took over Carrière de Limont-Fontaine (CBS) in the Valenciennes region.

The Aggregates industry moved into the deployment of multimodal logistics platforms. The Ferques quarry added a major product processing unit for construction to its existing plant facilities. The Group continued to expand into the ready-mixed concrete and concrete block sectors giving rise to a new industrial sector named CB Premix.

The Carrières du Boulonnais Group becomes CB Group to better reflect the diversity of its business activities. The concrete business exceeds the volume of 500,000 m3 sold.

15 years after acquiring CBS, the aggregates business initiated an external growth process beyond its natural borders with in particular the takeover of Carrières Blanc in Izernore (01). 

Acquisition of Carrières Rivat et Vincent in the Rhone-Alpes region enabling the growth of this sector to continue. The sector is organised by geographical area to support the Group’s development. The Napoleon project marked a new turning: offices and related installations move to the Ferques site to mine the remaining marble on the former Napoléon quarry site. 

Start-up of aggregates activities in Canada.