The Société Routière Colas (SRC) was listed on the French Stock Exchange in 1961. The Raveau-Cartier group put up a major part of its stake in the public offering but still held a majority stake of 50.1%.

In 1962, the Société Routière Colas (SRC) set its sights on Canada. The company took full control of the Québec-based company Fabi Ltd, in 1963. In 1967, SRC consolidated its Canadian subsidiaries into the Société d’Investissements et de Travaux (Sintra Ltd ), establoshed in Montréal.

SRC began developing its quarry business in the 1960s. The challenge was to secure supply when the aggregate market became tense. The company bought a stake in the capital of two French companies that manage quarries. The business was new for Colas, and will become full-fledged segment in the future.