Concrete: Difference between revisions
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=Formula= | =Formula= | ||
*To make 1 yard - To make 1 cubic yard of concrete, you'd need seven 94-pound bags of cement, about 1/2 cubic yard of sand and just over 3/4 cubic yard of gravel. The amount of water you use depends on how wet the sand is.Oct 1, 2009 [https://www.popularmechanics.com/home/how-to/a3214/1275111/#:~:text=To%20make%201%20cubic%20yard,how%20wet%20the%20sand%20is.] | |||
*10% cement, 75% aggregate, 15% water [https://www.cement.org/cement-concrete-applications/how-concrete-is-made#:~:text=Typically%2C%20a%20mix%20is%20about,another%205%20to%208%20percent.] | *10% cement, 75% aggregate, 15% water [https://www.cement.org/cement-concrete-applications/how-concrete-is-made#:~:text=Typically%2C%20a%20mix%20is%20about,another%205%20to%208%20percent.] | ||
*150 kg/m3 of cement - with concrete at 4000 lb/cu yd [https://www.google.com/search?sxsrf=ALeKk026QG9BbsZl0rNsBS9KmerMgczY_w%3A1602863734253&source=hp&ei=dsKJX6q8DJDYsAXHkpG4Cw&q=how+much+does+one+cubic+yard+of+concrete+weigh&btnK=Google+Search&oq=how+to+configure+nvidia+geforce+gtx+1650+super+on+linux+mint&gs_lcp=CgZwc3ktYWIQAzIFCCEQoAEyBQghEKsCMgUIIRCrAjoOCAAQ6gIQtAIQmgEQ5QI6DgguELEDEMcBEKMCEJMCOggILhDHARCvAToLCC4QsQMQxwEQowI6CAgAELEDEIMBOggILhCxAxCDAToFCAAQsQM6AggAOgQIABAKOgYIABAWEB46CAghEBYQHRAeOgcIIRAKEKABUMsQWOmzAWD8tAFoBnAAeACAAeQGiAGhS5IBDTExLjQ3LjMuMi42LTGYAQCgAQGqAQdnd3Mtd2l6sAEG&sclient=psy-ab&ved=0ahUKEwiqz4DcvLnsAhUQLKwKHUdJBLcQ4dUDCAk&uact=5] - was sufficient to get about 6000 psi concrete strength [https://www.sciencedirect.com/science/article/pii/B978012804524400004X]. Does this mean abouut 8% of cement? | *150 kg/m3 of cement - with concrete at 4000 lb/cu yd [https://www.google.com/search?sxsrf=ALeKk026QG9BbsZl0rNsBS9KmerMgczY_w%3A1602863734253&source=hp&ei=dsKJX6q8DJDYsAXHkpG4Cw&q=how+much+does+one+cubic+yard+of+concrete+weigh&btnK=Google+Search&oq=how+to+configure+nvidia+geforce+gtx+1650+super+on+linux+mint&gs_lcp=CgZwc3ktYWIQAzIFCCEQoAEyBQghEKsCMgUIIRCrAjoOCAAQ6gIQtAIQmgEQ5QI6DgguELEDEMcBEKMCEJMCOggILhDHARCvAToLCC4QsQMQxwEQowI6CAgAELEDEIMBOggILhCxAxCDAToFCAAQsQM6AggAOgQIABAKOgYIABAWEB46CAghEBYQHRAeOgcIIRAKEKABUMsQWOmzAWD8tAFoBnAAeACAAeQGiAGhS5IBDTExLjQ3LjMuMi42LTGYAQCgAQGqAQdnd3Mtd2l6sAEG&sclient=psy-ab&ved=0ahUKEwiqz4DcvLnsAhUQLKwKHUdJBLcQ4dUDCAk&uact=5] - was sufficient to get about 6000 psi concrete strength [https://www.sciencedirect.com/science/article/pii/B978012804524400004X]. Does this mean abouut 8% of cement? | ||
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*Lean concrete per california codes is 300 lb cement per yard of concrete, and is 700 PSI at 7 days. [http://www.greenbookspecs.org/documents/change/change192ns.pdf] | *Lean concrete per california codes is 300 lb cement per yard of concrete, and is 700 PSI at 7 days. [http://www.greenbookspecs.org/documents/change/change192ns.pdf] | ||
*Lean is used below foundations - and is 700 psi or 1100 psi [https://wecivilengineers.wordpress.com/2018/04/01/what-is-lean-concrete-where-it-is-used/] | *Lean is used below foundations - and is 700 psi or 1100 psi [https://wecivilengineers.wordpress.com/2018/04/01/what-is-lean-concrete-where-it-is-used/] | ||
=Slab Requirements= | =Slab Requirements= | ||
*2500 PSI concrete minimum for slab on grade in Oregon - [https://www.co.douglas.or.us/building/INSPECT.gen.residential.info.htm] and Georgia [https://up.codes/viewer/georgia/irc-2012/chapter/4/foundations#4] | *2500 PSI concrete minimum for slab on grade in Oregon - [https://www.co.douglas.or.us/building/INSPECT.gen.residential.info.htm] and Georgia [https://up.codes/viewer/georgia/irc-2012/chapter/4/foundations#4] | ||
Revision as of 01:01, 17 December 2020
Formula
- To make 1 yard - To make 1 cubic yard of concrete, you'd need seven 94-pound bags of cement, about 1/2 cubic yard of sand and just over 3/4 cubic yard of gravel. The amount of water you use depends on how wet the sand is.Oct 1, 2009 [1]
- 10% cement, 75% aggregate, 15% water [2]
- 150 kg/m3 of cement - with concrete at 4000 lb/cu yd [3] - was sufficient to get about 6000 psi concrete strength [4]. Does this mean abouut 8% of cement?
- 500 lb per yard of cement in concrete is recommended - read a thesis on it - [5]
- Lean or rich: 7-15% cement by volume -
- Lean concrete per california codes is 300 lb cement per yard of concrete, and is 700 PSI at 7 days. [6]
- Lean is used below foundations - and is 700 psi or 1100 psi [7]
Slab Requirements
Concrete Slump Testu
Measures inches of collapse, from 0-12", of a wad of concrete in a cone. 12" means it's complete water. 4" is very stiff.