Canada: The Lafarge Brookfield cement plant in Nova Scotia, Canada, is celebrating its 50th anniversary of operations in 2015.

In 1957, the Canada Cement Company sent a team of engineers and land surveyors to Nova Scotia, Canada to search for a limestone deposit suitable for the construction of a cement plant. Out of 27 potential sites, Brookfield received the nod of approval. The company proceeded over the next few years to build a US$25m state-of-the-art cement plant. Production began on 29 September 1965.

While the raw materials mixture and fuels used for production have changed in the past five decades, the overall method of manufacturing remains the same, according to Plant Manager ScarthMacDonnell. "In some ways the plant has not changed a bit since it opened up. The fundamental process of cement manufacturing has not changed. The products we make, the fuels we use and the environmental footprint has completely transformed. So the cements we make today make 25% less carbon dioxide then they did when the plant started up," said MacDonnell. He added that more than 20% of the energy used for cement production comes from recycled materials.

More than 1000 individuals have earned a living working at Lafarge over the past 50 years while continuously producing cement that has been used in countless projects, big and small. By far the biggest showcase project the plant has been involved with was providing all the cement used in the construction of the Confederation Bridge, between New Brunswick and Prince Edward Island. "It was a very special recipe," said MacDonnell, of the 250,000t of cement used for the project. "It was a specialised, high-performance cement that was required for the job and it was a different product than was normally made."

Despite 50 years of mining, the reserves in the limestone deposit discovered back in 1957 are far from being depleted. "We've got well over 25 years of stone still on the property," said MacDonnell. "And there's more there if we want to go get it."