The effect of bottom ash composition on the mechanical properties of road basis material

• Main Authors: Chih-Hung Chang, 張智閎
• Other Authors: Chiou-Liang Lin
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/84244382210631230319

碩士 === 國立高雄大學 === 土木與環境工程學系碩士班 === 100 === According to the statistical information of Taiwan’s EPA, in recent years, a large number of bottom ashes are used for the road construction in place of burying it as the final process. As the bottom ashes are used more and more frequently, the effect of different constituents of bottom ash for related engineering plays an important role to make sure the quality of operation. For geotechnical engineering, it is seldom to consider the chemical composition. Therefore, this study focuses on the effect of proportion of the principal constituents in (SiO2, CaO, Fe2O3, and Al2O3) bottom ash on the direct shear test. Additionally, the multi-variable regression analysis is employed analyze the consequence of the direct shear result and to propose an experiences formula. This study discovered that the bottom ash from untreated general industrial waste of incinerator usually takes SiO2 as the main component. In dry condition, the friction angle is between 48.04° and 52.66°. Based on the result of the multi-variable regression analysis, the friction angle is mainly affected by the Fe2O3 and Al2O3 in dry condition. On the other hand, in the wet condition, the friction angle is between 44.16° and 54.62°, and the friction angle is mainly affected by the CaO and Al2O3. However, when the bottom ash is collected from treating general industrial waste of incinerator, that usually has highly contents of Fe2O3 and Al2O3. In t he dry condition, the friction angle is almost between 44.60° and 52.52°. It the same consequent of the multi-variable regression analysis as non-general industrial waste incineration plant that has deeply affected by Fe2O3 and Al2O3. Therefore, we recommend to control influential chemistry constituents of bottom ash, in order to acquire better engineering property, and to make sure the quality of engineering property.