Nigerian billionaire Aliko Dangote gestures during an interview with Reuters in his office in Lagos June 13, 2012. Dangote is targeting a market capitalisation of $35-40 billion for his cement company when he lists it in London next year, and the money will be used to pay off investors including himself, he told Reuters on Wednesday. Africa's richest man with a cement empire stretching from Senegal to South Africa, Dangote said in an interview at his office in Lagos that Dangote Cement had raised its capacity target to 60 million tonnes a year by 2015 from a previous 50 million tonne target. To match Interview NIGERIA-DANGOTE/ REUTERS/Akintunde Akinleye (NIGERIA - Tags: PROFILE SOCIETY WEALTH BUSINESS)