Problem
1. Discuss the mechanisms by which mineral admixtures improve the durability of concrete to acidic waters. Why is that all fly ash-portland cement or slag-portland cement combinations may not turn out to be sulfate-resisting?
2. What maximum strength levels have been attained in recently developed high strength concrete mixtures? Explain the role played by admixtures in the development of these concretes.
3. What is high-performance concrete?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.