英文学术report中introduction写作范例.pptVIP

Conditioned MSWI ash-slag-mix as a replacement for cement in cement mortar Background Research Question Purpose * Basic knowledge MSWI 城市固体垃圾焚烧 ash-slag-mix 灰与炉渣的混合物 cement mortar 水泥砂浆 Part One Background Part Two Literature Review Part Three Research Question Part Four Purpose Most municipal solid waste (MSW) is incinerated in Taiwan. Municipal solid waste incinerators (MSWIs) in Taiwan produce about 250,000 tons of fly-ash and scrubber-ash annually. The resulting ash waste contains hazardous heavy metals. A chelating agent and 20 wt% cement are added to the ash, which is then solidified for safe disposal in landfill sites. However, leaching of heavy metals is still possible in the long term. 　　　　　　　　　　　　　　　　　　 Gneral Area Subarea Literature Review To reuse fly-ash, Al-Rawas et al. investigated the effects of various replacement ratios of sand or cement in a cement mortar using MSWI fly-ash . Water-permeable pavement bricks can be made from the molten slag of MSWI fly-ash(Nishigaki,2000) . Partial substitution of cement in mortar by using molten and pulverized slag has recently been of interest due to the ease with which fly-ash can be vitri?ed . Author Prominent Information Prominent General to specific However, it is extremely difficult to vitrify MSWI scrubber-ash due to its high concentration of CaO and insufficient SiO2. Lee et al. added waste glass to a mixture of fly-ash and scrubber-ash to successfully vitrify these substances and investigated a mortar that featured 20 wt.% cement replacement with slag powder .Heavy metals were barely detected in Toxicity characteristic leaching procedure (TCLP) tests of the modified slag-cement mortar, and the compressive strengths were reported to be acceptable after curing for more than 28 days. Author Prominent Waste glass is a very useful resource and can be recycled in many ways. The use o