초록

A cementitious porous pavement comprising a hydraulic conductivity greater than about 0.0001 cm/sec and a depth of at least three inches.

대표청구항 ▼

The invention claimed is: 1. A porous pavement comprising a cementitious pavement material having a hydraulic conductivity greater than 0.0001 cm/sec and an amphoteric compound-bonded to said porous pavement such that waterborne constituents contained in fluids flowing through said pavement are cap

The invention claimed is: 1. A porous pavement comprising a cementitious pavement material having a hydraulic conductivity greater than 0.0001 cm/sec and an amphoteric compound-bonded to said porous pavement such that waterborne constituents contained in fluids flowing through said pavement are captured by said amphoteric compound. 2. A porous pavement according to claim 1, further comprising a length and a width, wherein the ratio between said length and said width is less than 20. 3. A porous pavement according to claim 2, wherein said pavement is at least about 6 inches in depth. 4. A porous pavement according to claim 1, wherein said cementitious pavement is formed from a slurry having a water to cement ratio ranging from about 0.14 to about 1.0. 5. A porous pavement according to claim 1, wherein said amphoteric compound comprises at least one oxide of iron, aluminum, manganese, or silicon. 6. A porous pavement according to claim 1, wherein said pavement comprises an alkaline cementitious porous pavement. 7. A porous pavement according to claim 6, wherein said pavement is formed from a slurry having a water to cement ratio ranging from about 0.3 to about 0.5. 8. A porous pavement according to claim 5, wherein said porous pavement is placed on a ground surface so as to be exposed to surface runoff water. 9. A porous pavement according to claim 8, wherein said porous pavement forms a rigid pavement surface or shoulder. 10. A porous pavement according to claim 8, wherein said amphoteric compound comprises at least two oxides of iron, aluminum, manganese, or silicon. 11. A porous pavement according to claim 5, wherein said pavement is placed as a continuous section. 12. A porous pavement according to claim 5, wherein said pavement is formed of pre-cast blocks. 13. A porous pavement according to claim 5, wherein said amphoteric compound comprises at least one oxide of aluminum. 14. A porous pavement according to claim 5, wherein said amphoteric compound comprises at least one oxide of manganese. 15. A porous pavement according to claim 5, wherein said amphoteric compound comprises at least one oxide of silicon. 16. A porous pavement according to claim 8, wherein the waterborne constituents includes a cation. 17. A porous pavement according to claim 16, wherein cation is at least one of Cd, Cu, Zn, Ni, Pb, or Cr. 18. A porous pavement according to claim 1, wherein said amphoteric compound is chosen from at least one compound of iron, manganese, aluminum, or silicon. 19. A porous pavement according to claim 5, wherein said hydraulic conductivity is between about 0.1 and about 0.01 cm/sec. 20. The porous pavement according to claim 5, wherein said pavement has a porosity greater than about 0.10. 21. A porous pavement according to claim 5, wherein said porous pavement consists essentially of a nonasphaltic cementitious pavement material. 22. A porous pavement according to claim 8, wherein fluid flowing across a top of said porous pavement is able to enter said porous pavement to contact said amphoteric compound.