Study on Application of Simulated Air Pollution Dust the Permeable Concrete
| Autor: | Yu-Min Wang, Chou-Fu Liang, Hong-Yu Wang, Min-Jen Yang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Earth and Environmental Science. 371:032027 |
| ISSN: | 1755-1315 1755-1307 |
| DOI: | 10.1088/1755-1315/371/3/032027 |
| Popis: | Impermeable pavement is usually adopted in pavement construction in Taiwan. Porous asphalt concrete employs features as water retention, cooling and promoting draining effect. However, with the increase of traffic volume and service duration, its draining function will decrease gradually, wherein porosity blocking is one of the major problems. The research aims at the analogue experiment on pervious concrete subject to dust blocking, which discusses the blocking status and changes in permeability due to natural dust fall and clump dust fall after rainfall. The experiment prepares 4 groups of mixing ratio. The aggregates are coarse and fine bottom ashes from the refuse incinerator. The proportion of cement is 130kg/m3 and 200kg/m3. The experiment simulates the influence and in-situ water permeability changes of specimens with different porosities been blocked by natural dust fall and then the dust been rushed into specimens by rainfall. Before the analogue experiment, the water permeability of 4 groups of specimens is 1399.75∼1412.91ml/15sec. The experiment adopts 2011 average monthly dust fall in Pingtung County and magnifies it by 10 to 20 times to simulate natural dust fall and clump dust fall on the pavement accordingly. It is known from the experimental results that due to the high porosity of pervious concrete, by ruling out other blocking factors, the natural dust fall has little influence on the water permeability of pervious concrete. While the simulation of clump dust fall is 15 times the natural dust fall, although water permeability the pavement is reduced sharply, it still meets the minimum 400ml/15sec of Japanese porous pavement technical indicator. It shows that the specimens have good permeability on future practical applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|