With rupee depreciating, companies feel they can compete with local companies abroad.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/cement-companies-south-eye-exports
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-standard-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cement-industry
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india-cement
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tamil-nadu
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/andhra-pradesh
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/madras-cements