Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Alternative Ashes in Concrete — New Technical and Aesthetical Performance
The research findings presented in this thesis Alternative Ashes in Concrete – New Technical and Aesthetical Performance contribute to the discussion on utilisation of sewage sludge ash (SSA) as a secondary resource. SSA is the result of incineration of sewage sludge, which is mainly applied at water treatment plants in dense areas to safely handle large amount of sludge. Today SSA is in most cases sent to landfill, which raises the question: is it possible for SSA to change status from waste to resource by utilising SSA in the production of cement based materials? So far SSA has not commercially been applied in concrete production. This is even though research has shown that SSA has some potential as secondary resource to partially replace cement in blended cements or concrete. One main reason might be the fact that SSA has a relatively high content of phosphorous, which is an irreplaceable nutrient essential for crop growth. Since phosphorous is regarded as a scarce resource, options to keep phosphorous in the nutrient cycle are increasingly becoming an object of attention. Consequently, the present research has focused on SSA utilisation as resource for production of cement based materials without losing the potential source for phosphorous used in fertilizer production. The present research included three studies in which different degrees of processed SSA was used in mortar to partially replace cement. The three processes used to treat the SSA were: milling, acid washing and electrodialytic treatment. The treatments were applied for two purposes: 1. optimizing the performance of the mortar, and 2. to recover the phosphorous available in the SSA. The main purpose of the experimental work was to unfold the aesthetical and technical potentials of mortar with SSA by showing how basic properties of mortar were affected when 20 % of cement was replaced with untreated and treated SSA. The outcome of the research project has both a linguistic and non-linguistic part, which collectively forms the thesis of a ...
Alternative Ashes in Concrete — New Technical and Aesthetical Performance
The research findings presented in this thesis Alternative Ashes in Concrete – New Technical and Aesthetical Performance contribute to the discussion on utilisation of sewage sludge ash (SSA) as a secondary resource. SSA is the result of incineration of sewage sludge, which is mainly applied at water treatment plants in dense areas to safely handle large amount of sludge. Today SSA is in most cases sent to landfill, which raises the question: is it possible for SSA to change status from waste to resource by utilising SSA in the production of cement based materials? So far SSA has not commercially been applied in concrete production. This is even though research has shown that SSA has some potential as secondary resource to partially replace cement in blended cements or concrete. One main reason might be the fact that SSA has a relatively high content of phosphorous, which is an irreplaceable nutrient essential for crop growth. Since phosphorous is regarded as a scarce resource, options to keep phosphorous in the nutrient cycle are increasingly becoming an object of attention. Consequently, the present research has focused on SSA utilisation as resource for production of cement based materials without losing the potential source for phosphorous used in fertilizer production. The present research included three studies in which different degrees of processed SSA was used in mortar to partially replace cement. The three processes used to treat the SSA were: milling, acid washing and electrodialytic treatment. The treatments were applied for two purposes: 1. optimizing the performance of the mortar, and 2. to recover the phosphorous available in the SSA. The main purpose of the experimental work was to unfold the aesthetical and technical potentials of mortar with SSA by showing how basic properties of mortar were affected when 20 % of cement was replaced with untreated and treated SSA. The outcome of the research project has both a linguistic and non-linguistic part, which collectively forms the thesis of a ...
Alternative Ashes in Concrete — New Technical and Aesthetical Performance
Kappel, Annemette (Autor:in)
01.01.2018
Kappel , A 2018 , Alternative Ashes in Concrete — New Technical and Aesthetical Performance . B Y G D T U. Rapport , no. 377 , Technical University of Denmark, Department of Civil Engineering .
Buch
Elektronische Ressource
Englisch
SDG 8 - Decent Work and Economic Growth , /dk/atira/pure/sustainabledevelopmentgoals/responsible_consumption_and_production , /dk/atira/pure/sustainabledevelopmentgoals/decent_work_and_economic_growth , SDG 12 - Responsible Consumption and Production , SDG 2 - Zero Hunger , /dk/atira/pure/sustainabledevelopmentgoals/zero_hunger
DDC:
690
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