Advanced Foundation: Difference between revisions
No edit summary |
(→Basics) |
||
| (2 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
=Basics= | =Basics= | ||
Compacted rock foundations are much less energy intensive than concrete. By maximizing the quantity of rock, the quantity of concrete can be minimized. | Compacted rock foundations are much less energy intensive than concrete. A good example of a solid gravel base is the railroad track - which sustains very heavy loads of 86 tons [https://www.google.com/search?sxsrf=ALeKk026QG9BbsZl0rNsBS9KmerMgczY_w%3A1602863734253&source=hp&ei=dsKJX6q8DJDYsAXHkpG4Cw&q=max+weight+of+railroad+wagon&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] - and is only 20" thick at max. By maximizing the quantity of rock, the quantity of concrete can be minimized. | ||
Concrete is 10-15 percent cement. Cement is typically 1:2:3 or 1:3:3 [https://www.rtsconstructioncompany.com/blog/concrete-mixing-ratios-a-guide#:~:text=1%3A3%3A3%20(cement,concrete%20patios%2C%20and%20foundation%20walls.]. 1:3:3 is 13% cement. | Concrete is 10-15 percent cement. Cement is typically 1:2:3 or 1:3:3 [https://www.rtsconstructioncompany.com/blog/concrete-mixing-ratios-a-guide#:~:text=1%3A3%3A3%20(cement,concrete%20patios%2C%20and%20foundation%20walls.]. 1:3:3 is 13% cement. | ||
| Line 7: | Line 7: | ||
Embodied energy of cement - 5.6 MJ/kg. Concrete trucks get 3 mpg [https://synproproducts.com/3-14-mpg-increase-fleet-mixer-trucks/#:~:text=Per%20the%20NRMCA%2C%20the%20average,additional%20weight%20on%20the%20truck.]. | Embodied energy of cement - 5.6 MJ/kg. Concrete trucks get 3 mpg [https://synproproducts.com/3-14-mpg-increase-fleet-mixer-trucks/#:~:text=Per%20the%20NRMCA%2C%20the%20average,additional%20weight%20on%20the%20truck.]. | ||
One gallon of gasoline can produce 20kg of cement, or 1 weight of gasoline produces 5 weights of cement. Thus, one weight gasoline produces 35 weights of concrete. | One gallon of gasoline can produce 20kg of cement, or 1 weight of gasoline produces 5 weights of cement. Thus, one weight gasoline produces 35 weights of concrete - which is a strong case for using more rock, less cement. | ||
Gasoline is 121 MJ per gallon. [https://www.google.com/search?sxsrf=ALeKk026QG9BbsZl0rNsBS9KmerMgczY_w%3A1602863734253&source=hp&ei=dsKJX6q8DJDYsAXHkpG4Cw&q=gasoline+in+MJ%2Fgal&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] | Gasoline is 121 MJ per gallon. [https://www.google.com/search?sxsrf=ALeKk026QG9BbsZl0rNsBS9KmerMgczY_w%3A1602863734253&source=hp&ei=dsKJX6q8DJDYsAXHkpG4Cw&q=gasoline+in+MJ%2Fgal&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] | ||
| Line 14: | Line 14: | ||
=Conclusions= | =Conclusions= | ||
Just to haul gravel - we are spending say 3 mpg, 25 mile haul - 8 gal - or equivalent of 1 ton of concrete in embodied energy. 10 dumps of gravel have same embodied energy as a concrete truck. Thus, say we minimize the concrete required by using more rock: say instead of 6" of rock, we use | Just to haul gravel - we are spending say 3 mpg, 25 mile haul - 8 gal - or equivalent of 1 ton of concrete in embodied energy. 10 dumps of gravel have same embodied energy as a concrete truck. Thus, say we minimize the concrete required by using more rock: say instead of 6" of rock, we use 20" of rock (4x more). Then we still come out ahead as opposed to using concrete - in embodied energy. However, a truck of concrete is $1500. 4 trucks of gravel are comparable. Thus, cost is comparable. Embodied energy of rock is smaller. | ||
Local solar concrete can cut down the transportation costs and fuel significantly. | Local solar concrete can cut down the transportation costs and fuel significantly. | ||
Latest revision as of 00:25, 12 March 2024
Basics
Compacted rock foundations are much less energy intensive than concrete. A good example of a solid gravel base is the railroad track - which sustains very heavy loads of 86 tons [1] - and is only 20" thick at max. By maximizing the quantity of rock, the quantity of concrete can be minimized.
Concrete is 10-15 percent cement. Cement is typically 1:2:3 or 1:3:3 [2]. 1:3:3 is 13% cement.
Embodied energy of cement - 5.6 MJ/kg. Concrete trucks get 3 mpg [3].
One gallon of gasoline can produce 20kg of cement, or 1 weight of gasoline produces 5 weights of cement. Thus, one weight gasoline produces 35 weights of concrete - which is a strong case for using more rock, less cement.
Gasoline is 121 MJ per gallon. [4]
Embodied energy of rock from gravel pit - aggregate seems to be 1/10 the embodied energy of concrete [5].
Conclusions
Just to haul gravel - we are spending say 3 mpg, 25 mile haul - 8 gal - or equivalent of 1 ton of concrete in embodied energy. 10 dumps of gravel have same embodied energy as a concrete truck. Thus, say we minimize the concrete required by using more rock: say instead of 6" of rock, we use 20" of rock (4x more). Then we still come out ahead as opposed to using concrete - in embodied energy. However, a truck of concrete is $1500. 4 trucks of gravel are comparable. Thus, cost is comparable. Embodied energy of rock is smaller.
Local solar concrete can cut down the transportation costs and fuel significantly.