Avalia????o das propriedades f??sicas e mec??nicas de microconcretos com substitui????o parcial do cimento por res??duos cer??micos

Submitted by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2017-08-23T17:29:55Z No. of bitstreams: 2 Disserta????o - Wallace M. Belchior.pdf: 2932796 bytes, checksum: 2f1494bc5656937791ee0fc2472fbf69 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Approved for entry into archive by Divis??o de Documenta????o/BC Biblioteca Central (ddbc@ufam.edu.br) on 2017-08-23T17:30:11Z (GMT) No. of bitstreams: 2 Disserta????o - Wallace M. Belchior.pdf: 2932796 bytes, checksum: 2f1494bc5656937791ee0fc2472fbf69 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Made available in DSpace on 2017-08-23T17:30:11Z (GMT). No. of bitstreams: 2 Disserta????o - Wallace M. Belchior.pdf: 2932796 bytes, checksum: 2f1494bc5656937791ee0fc2472fbf69 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-03-17 FAPEAM - Funda????o de Amparo ?? Pesquisa do Estado do Amazonas Cement is the second most consumed product in the world, it lost only to water. This motive has led several researchers to seek new materials that can partially replace the use of cement, with lower cost and less impact on the environment. The use of industrial waste such as ceramic waste (CW) in partial replacement of Portland cement (PC) in the production of pastes, mortars and concretes, reduces the cost of the raw material, besides being able to contribute to the environment, since each ton of PC produces a tonne of carbon dioxide (CO2) that is released into the atmosphere. In this way, the CW can be used as raw material in civil building, minimizing the environmental impact and in a sustainable way generating employment and income for the communities of the Ceramic Polo. In this context, an experimental program was implemented to evaluate different levels of CW (0%, 10%, 20%, 30%, 40% and 50%) in the partial replacement of Portland cement. Physical tests (specific mass, particle size, X-ray diffraction and TG / DTG thermogravimetry) and chemical tests (X-ray fluorescence) were used to characterize CW and PC and mechanical tests (axial compression at 7, 14 and 28 days) in microconcrete characterization. The results indicated that the CW had pozzolanic properties according to the norm NBR 12653: 2014 and that the microconcretes produced with the content of 30% CW showed the highest reduction of the calcium hydroxide content (about 62%) and better properties mechanics, with strenght of the order of 55.63 MPa and 62.00 MPa at 14 and 28 days, respectively. These results point out the potential of CW as pozzolanic material in the production of microconcretes. O cimento ?? o segundo produto mais consumido no mundo, perdendo apenas para a ??gua. Esse motivo tem levado v??rios pesquisadores a buscarem novos materiais que possam substituir parcialmente o uso do cimento, com menor custo e menor impacto ao meio ambiente. O aproveitamento de res??duos industriais como o res??duo cer??mico (RC) em substitui????o parcial ao cimento Portland (CP) na produ????o de pastas, argamassas e concretos, reduz o custo da mat??ria prima, al??m de poder contribuir com o meio ambiente, visto que cada tonelada de CP gera uma tonelada de di??xido de carbono (CO2) que ?? liberado na atmosfera. Desta maneira, o RC pode ser aproveitado como mat??ria prima na constru????o civil, minimizando o impacto ambiental e de forma sustent??vel gerando emprego e renda para as comunidades do Polo Cer??mico. Neste contexto, um programa experimental foi implementado para avaliar diferentes teores de RC (0%, 10%, 20%, 30%, 40% e 50%) na substitui????o parcial do cimento Portland na produ????o de microconcreto. Ensaios f??sicos (massa espec??fica, granulometria, difra????o de raio X e termogravimetria TG/DTG) e qu??mico (fluoresc??ncia de raios X) foram utilizados na caracteriza????o do RC e do CP e ensaios mec??nicos (compress??o axial aos 7, 14 e 28 dias) na caracteriza????o dos microconcretos. Os resultados indicaram que o RC apresentou propriedades pozol??nicas de acordo com a norma NBR 12653:2014 e que os microconcretos produzidos com o teor de 30% de RC apresentaram a maior redu????o do teor de hidr??xido de c??lcio (cerca de 62%) e melhores propriedades mec??nicas, com resist??ncias da ordem de 55,63 MPa e 62,00 MPa aos 14 e 28 dias, respectivamente. Tais resultados apontam o potencial do RC como material pozol??nico na produ????o de microconcretos.