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Resumo A Igreja de Nossa Senhora da Candelaria, cuja construcao do atual predio data de 1898, localiza-se no centro da cidade do Rio de Janeiro. Em 1938 foi inscrita pelo IPHAN nos Livros do Tombo Historico e no de Belas Artes. Visando a preservacao deste patrimonio nacional propoe-se avaliar o estado de conservacao das rochas que compoe as fachadas da Igreja, identificar as litologias e os diversos danos presentes no exterior do primeiro andar, e por meio de ensaios nao-destrutivos in situ avaliar a dureza e a propagacao de ondas ultrassonicas na fachada principal. Para tanto foram avaliados 280 pontos de dureza e 87 pontos de velocidade ultrassonica. Foram tambem realizadas avaliacoes pontuais de FRX portatil e coletas de agua de lavagem. Os resultados indicaram que a rocha na fachada principal e o leptinito, e os principais danos sao formacoes de bolhas e microfissuras. Na fachada posterior e nas laterais os corpos rochosos sao gnaisses facoidais e ha menos feicoes de alteracao. As perdas de material, filmes negros, pichacoes e fezes de animais sao danos comuns a todas as fachadas. Dentre as conclusoes foi possivel verificar que as rochas da fachada principal aparentam maior desgaste em relacao as demais fachadas, nesta observaram-se exposicoes minerais e menor resistencia a impactos, que podem indicar que as rochas encontram-se em processo de alteracao, possivelmente acentuado pela proximidade ao mar, poluicao por dioxido de enxofre, pela utilizacao da area externa da igreja como abrigo para pernoite de moradores de rua e pelos impactos e vibracoes decorrentes de obras e trafego no entorno. Palavras Chave: rochas ornamentais, alterabilidade, Igreja de Nossa Senhora da Candelaria Abstract MORPHOLOGY STUDY OF ALTERATION PRESENT IN THE ROCK FACADES OF NOSSA SENHORA DA CANDELARIA CHURCH. The Church of Nossa Senhora da Candelaria, whose construction of the current building dates from 1898, is located in Rio de Janeiro´s downtown. It was registered in 1938 by IPHAN in the books Tombo Historico and in Belas Artes. For the preservation of this national heritage is proposed to evaluate the conservation status of the dimension stone present in the facades of the Church, identification of lithologies and various damage present on the exterior of the first floor, and through non-destructive testing in situe valuate the hardness and determinate the sound speed propagation in the main facade. Therefore, 280 hardness points were evaluated and 87 points of the ultrasonic velocity. Also there were pontual evaluations by using portable XRF and water sampling. The results point out the predominant rock in the main facade is the leptinite gneiss, and major damage are formations of blistering and microcracks. On the back facade and sides the bodies are augen gneisses and there is less change of features, most related to human interventions such as mortar applications. The loss of material, black films, graffiti and animal feces damage are common to all the facades. Among the conclusions it was possible to verify that the dimension stones of the main facade appear more damage compared to other facades, were observed mineral exposures, lower resistance to impact and change of color, which may indicate that the stones are in change process possibly enhanced by proximity to the sea, pollution from sulfur dioxide, the removal of graffiti, the use of the area outside the church as a shelter for the homeless overnight and the impacts and vibrations resulting from works and surrounding traffic. Keywords: dimension stone, alterability, Church of Nossa Senhora da Candelaria

ESTUDO DAS MORFOLOGIAS DE ALTERAÇÃO PRESENTES NAS ROCHAS DAS FACHADAS DA IGREJA DE NOSSA SENHORA DA CANDELÁRIA