Bulk material cover compositions and methods of applying

A method of providing a cover to a bulk material pile, the method comprising:

• providing a bulk material cover composition free of foaming agent comprising:
• at least about 50 weight percent water,
• about 1 to about 50 weight percent of at least one of cement and fly ash,
• at least some fiber,
• at least some cellulosic water dispersible polymer, and
• at least some acid;
• applying the composition onto the bulk material pile;
• and
• allowing the composition to harden to provide a cover to at least a portion of the bulk material pile,
• wherein the acid is present in an amount sufficient to maintain the pH of the cover composition between about 1.0 and about 6.0.