Problem
1. The presence of high free-lime in portland cement can lead to unsoundness. What is meant by the term, "unsoundness"? Which other compound can cause unsoundness in portland cement products?
2. Approximately, what is the combined percentage of calcium silicates in portland cement? What are the typical amounts of C3Aand C4AF in ordinary (ASTM Type I) portland cement?
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.