How is Coal Fly Ash Used in Construction?

The 10 largest coal producers and exporters in the Indonesia:

1. Bumi Resouces
2. Adaro Energy
3. Indo Tambangraya Megah
4. Berau Coal
5. Bukit Asam
6. Baramulti Sukses Sarana
7. Harum Energy
8. Mitrabara Adiperdana 
9. Samindo Resources
10. United Tractors

Source: Samuel Jebaraj, Class Representative at Civil Engineering at Anna University,Tindivanam