Advanced Foundation: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
=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. By maximizing the quantity of rock, the quantity of concrete can be minimized. | ||
| Line 4: | Line 6: | ||
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. | |||
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] | ||
Embodied energy of rock from gravel pit - aggregate seems to be 1/10 the embodied energy of concrete [https://englishstone.org.uk/Sustain.html]. | Embodied energy of rock from gravel pit - aggregate seems to be 1/10 the embodied energy of concrete [https://englishstone.org.uk/Sustain.html]. | ||
=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 2 feet of rock (5x more). Then we still come out ahead as opposed to using concrete - in embodied energy. However, a truck of concrete is $1500. 5 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. | |||
Revision as of 00:15, 12 March 2024
Basics
Compacted rock foundations are much less energy intensive than concrete. 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 [1]. 1:3:3 is 13% cement.
Embodied energy of cement - 5.6 MJ/kg. Concrete trucks get 3 mpg [2].
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.
Gasoline is 121 MJ per gallon. [3]
Embodied energy of rock from gravel pit - aggregate seems to be 1/10 the embodied energy of concrete [4].
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 2 feet of rock (5x more). Then we still come out ahead as opposed to using concrete - in embodied energy. However, a truck of concrete is $1500. 5 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.