Reading up on concrete water reducer additives, it says it "reduces water by 5% - 10%". I assume this actually means that it reduces the required amount of water? I.e. I would mix in less water, correct?
This would also decrease the amount of shrinkage that occurs during curing, correct?
Maybe this should be its own question, but will it be odd to communicate to a concrete contractor my desire for very low water content and request water reducer be used? Will they get annoyed at me dictating these details? I have read alot of professionals griping about other contractors adding too much water to make the concrete easier to work. I am looking to do a monolithic cast in place pool 16'x32' and plan to do forms+rebar but contract the pour. I am aware these days most pools use shotcrete/gunite which avoid shrinkage cracking due to much lower water content. The gunite guys around here want $40,000 to do a pool so thats out of the question for me. So trying to do a monolithic pour and take every precaution I can against shrinkage cracking. I reallize theres other contributors to cracking but dont want to ramble on.
How can I ensure the concrete contractor mixed in the water reducer and used less water? I know I can do a slump test onsite, but the water reducer acting as a plasticizer will mean that the cincrete with less water+plasticizer will have same slump as concrete with more water and no plasticizer, AFAIK.