Cement makers Lafarge and Holcim today proposed a series of asset sales across Europe.

These would include all of Holcim's French activities and Lafarge's German and Romanian ones, as they seek approval from regulators for their merger. 

The two companies need to shed around €5 billion in assets to help persuade competition regulators to back the proposed merger which was unveiled in April and would create the world's biggest cement maker with $44 billion in annual sales. 

The companies said they would seek buyers for operations in Austria, Hungary, Romania, Serbia, Britain, Canada, the Philippines, Mauritius and Brazil, among others. 

The proposed divestments represent about 10% of Holcim and Lafarge's global sales. 

Holcim Chief Executive Bernard Fontana said the companies had already received about 50 expressions of interest from potential buyers and would soon begin negotiations. 

Competition regulators in some 15 countries, as well as the European Commission, are expected to take a hard look at the Holcim-Lafarge deal, which brings together the two biggest cement makers globally. 

Europe's top competition regulator, Joaquin Almunia, has said the merger would be subject to an in-depth review, known as a phase 2 examination, given the deal's size. 

"Both companies will continue to consider whether (additional) divestments would be necessary where there might be overlaps depending on regulatory requirements," Holcim and Lafarge said in a statement today. 

Fontana added that the companies planned to officially apply for approval from EU competition regulators this summer. 

The tie-up is expected to close in the first half of 2015.