A further £30m is being saved from fully integrating cement maker Rugby, bought by RMC at the start of the year.
The group said that the 1000 job cuts it announced in September, mostly in the UK and Germany, have already taken place.
A statement said the firm was also looking to sell non-core subsidiaries, including its Derbyshire lime operation its joinery business in the USA.
The statement said: "The Strategic Review has confirmed the board's strategy of focusing on heavy building materials, including cement, worldwide. The group's strong international market positions in heavy building materials offer the best opportunity to deliver improving returns to shareholders."