Sökning: "coal fly ash"
Visar resultat 1 - 5 av 13 avhandlingar innehållade orden coal fly ash.
1. Co-disposal of waste rock and lignite fly ash to mitigate the environmental impact of coal mining
Sammanfattning : Waste rocks (WRs) from coal mining and fly ash (FA) from coal combustion were studied to determine the potential of the WRs to generate AMD, FAs to neutralise it and estimate their impacts on environment. The ultimate goal was to develop a methodology based on co-disposal to mitigate the environmental problems associated to both wastes. LÄS MER
2. Hydration, pore structure, and related moisture properties of fly ash blended cement-based materials : Experimental methods and laboratory measurements
Sammanfattning : Cement-based materials, such as mortar and concrete, are the most employed construction materials in the world. Cement is an important component; it reacts with water to form a glue, called cement paste, which causes the material to harden. Today, cement production accounts for a significant portion of the world’s annual carbon dioxide emissions. LÄS MER
3. Environmental records of carbonaceous fly-ash particles from fossil-fuel combustion
Sammanfattning : Fossil fuel combustion produces fly-ash particles that are released into the atmosphere and deposited in the environment. A particularly characteristic kind of fly-ash is spheroidal carbonaceous particles. They are composed of an amorphous carbon matrix in which other elements are dispersed. LÄS MER
4. Extraction of Polycyclic Aromatic Hydrocarbons (PAHs) in diesel and coal fly ash particulate matter : Emphasis on the carcinogenic benzo[a]pyrene and dibenzopyrene isomers
Sammanfattning : .... LÄS MER
5. Performance based concrete mix-design : aggregate and micro mortar optimization applied on self-compacting concrete containing fly ash
Sammanfattning : This thesis is dealing with the field of self-compacting concrete (SCC). SCC is supposed to fill the form properly and enclose the reinforcement without any external vibration. The fresh properties of such a concrete are thus essential. SCC was first introduced in Japan in the middle of 1980th. LÄS MER