Problem
1. The aluminate-sulfate balance in solution is at the heart of several abnormal setting problems in concrete technology. Justify this statement by discussing how the phenomena of quick-set, flash set, and false set occur in freshly hydrated portland cements.
2. Assuming the chemical composition of the calcium silicate hydrate formed on hydration of C3S or C2S corresponds to C3S2H3, make calculations to show the proportion of calcium hydroxide in the final products and the amount of water needed for full hydration.
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.