Daniela Camarda da Silveira

Idiomas

Projetos de pesquisa

• 2014 - 2015

  Lowering Co2 Emission and Making Concrete More Environmentally Friendly by Adding Limestone, Descrição: The goal of our proposal, Lowering CO2 Emission and Making Concrete More Environmentally Friendly by Adding Limestone, is to produce a more sustainable concrete by engaging a team of undergraduate civil engineering students to address challenges associated with incorporating limestone in the concrete mixture and measuring the amount of CO2 emission. / Objective: The primary objective of this proposal is to test materials performance and carbonation capacity of Portland limestone concrete (PLC) mixtures. A successfully developed product will meet the existing technical specifications for material performance while demonstrating higher carbonation capacity (the ability of the concrete to sequester carbon dioxide). U.S. standards currently authorize the use of up to 5% limestone, but incorporating higher levels of limestone (potentially up to 35% limestone) will improve the environmental benefit. Limestone incorporation lowers the embodied CO2 within the production process, while increasing carbonation within the matrix. By one estimate replacing 25 to 35% of cement with limestone in the concrete mixture decreases thermal energy demand by 0.22 to 0.60 GJ/t-cement and reduces direct and indirect CO2 emission up to 140 t CO2/t-cement. However, the material performance at higher levels of limestone remains under-characterized. / Approach: Working within a team of students, an industry partner, and faculty with expertise in environmental analysis and structural concrete, team members will be involved in research designed to innovate, create, and evaluate a more sustainable concrete product. Team members will create concrete products that incorporate varying percentages of limestone. These sample products will be evaluated to determine whether or not a developed Portland Limestone Concrete meets existing criteria for concrete material design and has less impact on the environment by measuring carbonation.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Daniela Camarda da Silveira - Integrante / James Barnhart - Integrante / Bryan Boulanger - Integrante / Ahmed Abdel-Mohti - Coordenador., Financiador(es): United States Environmental Protection Agency - Auxílio financeiro.