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A platform for research: civil engineering, architecture and urbanism
Concreto de escoria de alto-forno ativada quimicamente: materiais, propriedades e avaliacao ambiental
The aim of this work is to produce blocks for hydraulical structure in concrete using AAS (alkali activated slag) as cement, granulated slag of blast furnace as fine aggregate and air-cooled blast furnace slag as coarse aggregate. The concrete compressive strength must absorb the stress caused by flexure and torsion from the locks between the units of the breakwater. The project was developed in order to comply with the physical, mechanical and durability requests according to Brasilian standards. Literature was consulted in order to select the shape and geometry to build the hydraulic structure. Mechanical, physical and durability concrete properties were investigated such as flexural strength, tense splitting strength, absorption of water by capillary forces water, absorption and percentage of voids. Blocks had been in marine environment during 1 year for evaluation of the durability and counting of number of marine organisms in its surface. Mean while, samples were immersed in a tank simulating marine environment where the water pH was monitored. The evaluation of the properties of the concrete showed better results or equivalents, for the alkali activated slag concrete, in comparison to the reference concrete. The classification and counting of marine organisms in the surface of the blocks and the evidence of the quality of the water indicate that the used material does not harm the environment.
Concreto de escoria de alto-forno ativada quimicamente: materiais, propriedades e avaliacao ambiental
The aim of this work is to produce blocks for hydraulical structure in concrete using AAS (alkali activated slag) as cement, granulated slag of blast furnace as fine aggregate and air-cooled blast furnace slag as coarse aggregate. The concrete compressive strength must absorb the stress caused by flexure and torsion from the locks between the units of the breakwater. The project was developed in order to comply with the physical, mechanical and durability requests according to Brasilian standards. Literature was consulted in order to select the shape and geometry to build the hydraulic structure. Mechanical, physical and durability concrete properties were investigated such as flexural strength, tense splitting strength, absorption of water by capillary forces water, absorption and percentage of voids. Blocks had been in marine environment during 1 year for evaluation of the durability and counting of number of marine organisms in its surface. Mean while, samples were immersed in a tank simulating marine environment where the water pH was monitored. The evaluation of the properties of the concrete showed better results or equivalents, for the alkali activated slag concrete, in comparison to the reference concrete. The classification and counting of marine organisms in the surface of the blocks and the evidence of the quality of the water indicate that the used material does not harm the environment.
Concreto de escoria de alto-forno ativada quimicamente: materiais, propriedades e avaliacao ambiental
Alkalisch aktivierter Schlackenzement: Material, Eigenschaften und Bewertung der Umweltauswirkungen
Alkali activated slag concrete: materials, properties and environmental evaluation
Magalhaes Coelho, Maria Antonia (author) / Gomes da Silva, Maristela (author) / Lordello dos Santos Souza, Fernando (author) / Sarmento, Robson (author) / Zandonade, Eliana (author) / Morimoto, Tsutomu (author) / Helmer, Jose Luiz (author)
2007
10 Seiten, 11 Bilder, 1 Tabelle, 16 Quellen
Conference paper
Storage medium
Portuguese
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