| Title |
Experimental Study on the Pore Clogging Phenomenon of Porous Concrete |
| Keywords |
porous concrete;service life;coefficient of permeability;size of maximum coarse aggregate;concentration of pore-clogging material;투수콘크리트;수명한계;투수계수;골재 최대치수;공극막힘재 농도 |
| Abstract |
A series of field and laboratory permeability tests were performed to investigate the pore-clogging phenomenon of porous concrete used for pavement materials of a road. The field permeability tests were conducted for 37 study points in Jeju city, using the porous concretes with 13㎜ of maximum coarse aggregate (G<SUB>max</SUB>). The results show that the service life of porous concrete is about 22 months when the permeability of the porous concrete is designed for 0.01 ㎝/sec. Some specimens were made with the purpose of recreating pore-clogging phenomenon. Tests were done for injected concentration of pore-clogging materials or size of maximum coarse aggregates (G<SUB>max</SUB>). The test results demonstrated that relatively long in service life experienced with small amount of injected concentration of pore-clogging materials, whereas relatively short in service life experienced with a reduction in size of maximum coarse aggregates (G<SUB>max</SUB>). In conclusion, the service life of porous concrete is in proportion to the concentration of pore-clogging material but it is in inverse proportion to the size of maximum coarse aggregate (G<SUB>max</SUB>). Thus, the persisting period of porous concrete can be determined with respect to concentration of pore-clogging materials or size of maximum coarse aggregates (G<SUB>max</SUB>). |