碩士 / 國立中興大學 / 水土保持學系 / 93 / Abstract
The bottom ash of incinerator can be mixed with cement to reproduce aggregates with larger granular size. This study is focus on the effect of using the reproduced aggregates as pavement on seashore or alluvion to prevent the erosion caused by wind. Experiment done in this study includes determining the physical properties of incinerator bottom ash, various methods of incinerator bottom ash solidification and aggregate reproduction, curing and sieve analysis of the reproduced aggregates, determining the material properties of the aggregates.
Certain amont(1200 g) of the reproduced aggregate with same granular size (3/8〞-9.5mm，1/4〞-6.7mm，#4-4.75mm，#8-2.36mm) is put on top of 1200g sea sand separately to generate experiment models. Samples are then put in wind tunnel to examine the effect of granular size on erosion caused by wind. The wind tunnel experiment is done with different wind speed (16m/s，18m/s，20m/s，22m/s and 24m/s).
The results show that the sand blow will occur when the wind speed reach 14 m/sec if the sea sand without any pavement or vegetation. Furthermore the sea sand in the wind tunnel will be totally blow out when the wind speed reach 18 m/s. On the other hand, no sand blow will occur if the sea sand is covered by the reproduced aggregates under the wind speed of 18 m/s. When the wind speed reach 20 m/sec and up, the erosion will still occur even there are pavements. It is obtained that the rate of erosion will decrease as the granular size increase. However, when the wind speed reachs 24 m/s, the erosion rate for the sea sand with 3/8〞 aggregate pavement has the trend to increase. It is conclude that using 1/4〞 or #4 reproduced aggregates as pavement for Coastal Sand Fixation should be a better choice.
| Identifer | oai:union.ndltd.org:TW/093NCHU0080014 |
| Date | January 2005 |
| Creators | Chen Wei-Hsi, 陳為溪 |
| Contributors | Haung Long min, 黃隆明 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 43 |
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