A História entre Tempos e Contratempos: Fontes Ibiapina e a obscura invenção do Piauí

Dans ce texte, nous prenons avec probleme le départment bresilien de Piauí comme espacialité de la Région « Nordeste », suivant les instants de son insertion politique et discursif dans l'identité régionale, qui s'est donnée entre la fin des années 1950 et débuts des années 1970. Pour ceci, nous proposons une analyse de discours identitaires de Piauí comme la littérature et le folklore produits alors, cherchant à rapporter telles discours avec les pratiques et intérêts politiques qui ont concouru pour la « nordestinization » de Piauí. Parmi ces discours et dans dialogue avec eux, nous prenons centralement l'oeuvre du juge et ecrivain João Nonon de Moura Fontes Ibiapina, emisseur de signes qui apparaît en ce moment. Notre objectif est discuter les images élaborées sur Piauí et son inclusion dans les stéréotypes cristallisés de Nordeste, comme la pauvreté et la nécessité, la vie dans le champs et la prédominance d'une « culture populaire » régionale. Dans une période d'importantes mutations dans la société brésilienne, dans la production culturelle, dans heurtes régionalistes Nordeste et dans les formes de penser et pratiquer les espaces, les intellectuels de Piauí que nous étudions ont essayé de recouvrir de mots et de sens la noirceur et l'incommode silence concernant le Piauí dans la Nation bresilienne, quand le déparment s'intégrait, au moyen de la Région, au Brésil urbain et industrialisé

Participação e ação política dos psicólogos frente à política de saúde mental no Piauí

It is intended to problematize forms of participation and political action of psychologists toward mental health policy in Piauí. The study was motivated through challenges faced by the local Psychiatric Reform movement, and the one underway in the country, which needs support technical-assistence and sociopolitical to guarantee accomplishments and to move on with the complete reversion of the asylum to psychosocial model. The method was based on institutional analysis and counted with three insertion moments for the field research: a) to identify historical and political events that configure the local Psychiatric Reform (documental research/oral memory) and to identify psychologists that act in Mental Health; b) to realize participant observation and semi-structured interview with 33 psychologists which act in Mental Health in Teresina; c) to follow the sociopolitical contexts/events of the local Psychiatric Reform (participant observation and conversation circles). The data were analyzed considering four discussion axes, achieved through categorization of the collected material: 1) ways of professional insertion of psychologists in mental health; 2) knowledge and practices used to act in this work context of the profession; 3) political professional movements of workers of the reformist local process; 4) political action of psychologists toward the course of Piauí mental health policy. We concluded identifying that the participation of psychologists in Piauí mental health finds strength by the conduction of its macro and micropolitical professional action. The first one follows oriented by the lemma of social commitment, despite this movement doesn t have equivalence in the transformation of practices and political-professional postures of psychologists in the daily of services. The second is constituted in the every day of work, standing to the political action of the profession implicated with the preservation of the classic modus operandi of being psychologist. Therefore, it is about the actions that give little sustainability technicalassistance to the Psychiatric Reform underway in the State, and why not say in the country

As políticas sociais na formação graduada do psicólogo no Piauí: análise curricular dos cursos

This research aimed to investigate the place of social policies in Psychology undergraduate programs from Piauí/Brazil. A documental study was done by analysing the Projeto Pedagógico de Curso (PPC) from five universities. Also, interviews were conducted, for each program, with a coordinator and a professor who teaches subjects related to social policies. The main results indicates that the Psychology undergraduate programs in Piauí are recent, created between the late 1990s and early 2000s, when professionals in this area were in demand. The social policies appear in PPC related to student profile; curricula emphasis, subjects and internships; albeit in a peripheral condition. Furthermore, disconnection between proposed profile and the curriculum; fragmentation and insufficient content about social policies; and predominance of clinical area were perceived in these institutions. It is noteworthy that health policies stand out in PPC while social assistance policy or other social policies were poorly mentioned. Therefore, the place of social policies must be reviewed in Psychology undergraduate programs from Piauí in order to include other social policies and improve the subjects articulation, assuming a central, critical and policy perspective

Cartografia de uma intervenção comunitária para prevenção de DST/HIV/AIDS

Community-based interventions have been presented as a proposal of operationalization of the concept of vulnerability to STD/Aids prevention. This study aimed to analyze the Community intervention developed through the project Strengthening of Community action networks for STD/Aids prevention: know and intervenein, at Mãe Luiza neighborhood, in the city of Natal, State of Rio Grande do Norte, Brazil. The study was conducted in the same location where intervention occurs and took as time reference the first 30 months of construction and deployment process, from April 2010 until December 2012. This is research with qualitative approach, participatory character, developed from the immersion of the researcher in the field, being this community intervention itself. In this perspective, the study approximates to the Cartographic method in which the researcher-researched is engendered in the acts and effects research. The data-generating sources were the memories of the researcher from the field notes, written narratives of subjects involved in the intervention and documents pertaining to the project. In the methodological path of cartography, the image of the rhizome by Deleuze and Guattari (1995) has accompanied the immersion in the field given the nature of research-intervention which approach to the concept of object-Rhizome. The presentation of results was composed for the attempted rhizomatic and a hypertext representation, based on the descriptive narrative taken from the documentary analysis and the multi-faceted narratives with the voices, the looks and the affections narrated by the subject involved, respectively. On the path taken, three lanes were drawn as synthesis of learning produced by experience-that can contribute to understanding the process under study, in his singular character, and reflections on other experiences of community intervention: track 1- Community intervention as active-reflective space and a cause; track 2 Inclusion as power and challenge of community involvement; track 3 Sustainability as A challenge of Community intervention. The study indicates that community intervention is presented as a potential producer of health as also produces practical and creative skills, subjects and inventive in the daily life of the community with a view to reinventing knowledge and practices for the prevention of STD/HIV/Aids

Reformas administrativas no Brasil: o caso do governo do estado do Piauí

From the 1980s, with technological development, globalization, and in a context of increasingly urgent demands, there is an international movement to modernize the state structures. Being driven by the victory of conservative governments in Britain and the U.S., this speech reform comes only to Brazil in the 1990s, the government of Fernando Henrique Cardoso. Thus, in view of the recent movement of states to implement this reform agenda in their structures this research was to identify the elements that made it possible to attempt to modernize the administrative structure of the state of Piauí in 2003, in view of the political and administrative career in which the state was entered. Seeking to clarify the problem studied here, through a case study carried out a descriptive and exploratory, using a technique of gathering data to document research and interviews semi-structured. As the lens of analysis for this study used the neo-historical and sociological institutionalism, through which it sought to identify the critical moment in which they gave the Administrative Reform of Piaui, the process of breaking with the political and administrative career that previously had being followed, and the isomorphic mechanisms that enabled this speech reform comes up to this state, mechanisms that allow the homogenization of the organizational field. In general it appears that the search for new patterns and new technologies for management by the states in Brazil is due to the context of fiscal crisis in which the states were entered, forcing them to seek alternative models of management . The process of diffusion of New Public Management agenda for the states became possible, among other factors, due to the new scenario in which was inserted into the Brazilian federal system in the second half of the 1990s, characterized by a greater articulation between the horizontalstates, where through the mechanisms of isomorphic institutional change was made possible by the absorption of the speech states reformer of the 1990s. However, due to the specificities of each region is given the experiences state unevenly. In the case of Piauí Administrative Reform only became possible due to the rearrangement of political forces in the state and the mechanisms of isomorphic institutional change, which allowed, in 2003, the state government to absorb the speech reformer

Os discursos sobre a educomunicação na rádio escolar: um estudo etnográfico e m uma escola pública

This research analyzes the discursive construction of Educommunication, from a training course of educommunicators, with teachers and students of school Profº Francisco Ivo Cavalcanti, state public school, geographically located in the city of Natal / RN, studying the constitution of the meanings that educommunication practice in School Radio acquires for trainers and course participants (teachers and students). The socio-historical context in which this research is based corresponds to the new social reality, mediated by information and communication Technologies. These technologies drive the educational institution to train students in the use of different languages that permeate society. But to do so, you must have also enabled teachers to work Communication technology to meet the aspirations of young people and adults who are part of the educational community. The objectives are to identify the conditions of discursive production around the educommunication practice in Radio School, examine the discursive construction of instructors and course participants in Educommunication and its dialogical brands, and see how the course participants relate to their educommunicative practice in the educational contexts, attributing meaning to the place of teachers and students. Therefore, this research uses ethnography applied to the school context as a methodological option, Pecheuxtian Discourse Analysis, the principles of Educommunication, the reflections of Paulo Freire and the concepts of Dialogism in Bakhtin as theoretical contributions. We adopted three areas of knowledge: Language, Communication and Education, in order to produce an analysis committed to the aspects that involve the use of radio in the school environment to promote an educommunicative practice. With this research we have built a web of meanings about the school that we are forming or we want to form in the XXI century, because we used the discourses of teachers and students immersed in new knowledge and practices in order to propel them to be subjects of communication in educational environment for a qualitative transformation of being and doing in school.

A terapia comunitária e a vivência de estudantes de medicina: uma estratégia de ensino aprendizagem do cuidado humanizado na ESF?

Before the scenario full of criticism about a medical model that gives privilege to the diseases and not to the diseased, there are many arguments that defend the need of redeem the humanized relationship between doctor and patient. It became indispensable to mold during the medical graduation a professional capable of perform a special care, less instrumental and more humanized; however, even though the advances of the pedagogical program of the medical graduation, we still face numerous challenges in the process of molding. This study has as general goal to understand if the students medicine experience with the Integrative Community Therapy (TCI) at the Primary Attention – APS/Family Healthy Strategy-ESF, presents potential to configure itself while strategy of teaching-learning to the integral and humanized care. It was held a qualitative research with the students of the medical graduation from the tenth to the twelfth semester that had experience with the TCI, as part of the Boarding of Family and Community Medicine – MFC. We used interviews with script and we resorted to analyze the narratives to Gadamerian Hermeneutics. It was possible to find that before join the boarding of MFC, the students were unaware the TCI and their preconceptions lined up with depreciated character. The experience with the TCI enabled the reframing of the prejudices and the build of new concepts. Internship in ESF and participate of TCI revealed potential to learning of the humanized care by the practical exercise with experiences that privilege the built of ties; the autonomy of the patient; the fulfillment of the longitudinality at the care of the patient; the acknowledgment of the power of resilience of the patients, at the strength of the collective, at the pain sharing, at the strength of a good communication, at the gains of qualified listening exercise. The absence of models of what to do was replaced by experiences of pains and joys at the learning of becoming a doctor. The pains spoke of the structural difficulties (inputs), at the get along with the socials vulnerabilities of the users and the difficult of perform a good communication with the patients. The joys were experienced at the finding of the humanized care exercise. Questions as structural difficulties, low number of people with TCI degree, a shortly experience of with TCI, show up as limitations to its utilization as pedagogical tool. In turn, the reflective potential is capable of cause resignifications about the know-how before the pain of the other being very much present at the narratives, signaling the potential of the learning of TCI. Therefore, this study advocate that the participation of the students at the TCI, beyond the power of offering the students a teaching-learning strategy to the humanized care, represents the possibility of enlarge the horizons of those future doctors at a glance much more conscious of the difficulties and potential of a professional at the ESF, contributing to the graduation of more sensitized professionals and prepared to perform an integral and humanized approach of the person and his/her community, contributing to an APS/ESF more resolute and rewarding to everyone.

Para uma gestão social no programa minha casa, minha vida: reflexões acerca da organização comunitária em empreendimentos da faixa 1

A política habitacional teve importante avanço na década de 2000, principalmente com a criação do Ministério das Cidades. A estruturação do Plano Nacional de Habitação ocasionou inclusão do tema na agenda governamental, permitindo a produção de habitação de interesse social voltada à população em situação vulnerável, através do Programa Minha Casa Minha Vida (PMCMV). Assim, a presente dissertação tem como objetivo compreender atributos de gestão social para a organização comunitária em empreendimentos da faixa 1 do Programa. Para tanto, realizou-se pesquisa quantitativa, por meio da aplicação de formulários, e qualitativa, por meio de grupo focal, ambos com beneficiários do Programa. No tocante aos resultados, observou-se debilidade do papel do Estado, caracterizado principalmente pelos frágeis Projetos Técnicos de Trabalho Social. Os elementos de gestão social igualmente foram frágeis, distanciando os empreendimentos de condições ideias de habitabilidade e convívio coletivo. A ausência de compreensão da relevância de bem-estar coletivo e a precariedade da esfera pública, conduzem ao afastamento da finalidade emancipatória da gestão social. Destacou-se, ainda, o papel de associações de moradores e de iniciativas de trabalho coletivo no atendimento de demandas sociais da comunidade.

Assinatura estrutural e geofísica da porção norte (fronteira Ceará-Piauí) no lineamento transbrasiliano: reativação na bacia do Parnaíba

The Transbrasiliano Lineament is a major shear zone trending NE-SW, related to the Brasiliano orogeny and evolved through high to low temperature stages. In this study, the structural and geophysical signature of the northern segment of Transbrasiliano Lineament was studied in its northern border, between Ceará and Piauí states, involving the Brasiliano mylonite zone, the Jaibaras Graben and reactivations affecting the sedimentary sequences post-ordovician of Parnaíba Basin. In the literature, is commonly the phanerozoic reactivation of this structure referred, generating several late Brasiliano grabens predating the paleozoic Parnaíba syneclises, like the Jaibaras Graben. Faults that cut the stratigraphic units of the Parnaíba Basin along the entire length of the Transbrasiliano Lineament express its reactivation during younger events. The magnetic anomaly field reduced to the pole map exhibit anomalies NE-trending, interpreted as the signature of the Transbrasiliano Lineament (and Brasiliano structures of the Borborema Province) in its high-temperature expression. The Jaibaras Graben is marked by a straight anomalous track with high magnetic susceptibility (interpreted as a prevalence of ferromagnesian rocks, probably volcanic), apparently without significant continuity in the substrate of Parnaíba Basin. The geometric and kinematic analysis of the structures in the study area, using remote sensing and field data, led to the characterization of four deformation phases brittle the ductilebrittle Dn, D1, D2 and D3. The Dn deformation phase of ediacaran-cambrian age, occurs exclusively in the Jaibaras Graben, with the development of comparatively higher temperature (as regards to younger events) ductile-brittle structures. D1, D2 and D3 deformation phases affect both the Jaibaras Graben as well as the paleozoic sequences of the northeastern edge of Parnaíba Basin, generating structures developed at lower temperatures, basically brittle/cataclastic. The SRTM image analysis allowed mapping different NE, NW and E-W trending lineaments in Parnaíba Basin, whose correlation with mesoscopic structures is discussed in terms of the reactivation of Transbrasiliano Lineament in association with the stages of general Atlantic opening and separation between South America and Africa, or even the distal orogenic events in Paleozoic.

O turismo de base comunitária como vetor de etnodesenvolvimento: a comunidade Mebêngôkre-Kayapó na Terra Indígena Las Casas - PA

This study aims to analyze the contribution that the future implementation of community-based tourism can provide to Mebengokre-Kayapo, people of the village Tekrejarôti, they re-inhabiting the indigenous land Las Casas, located in southern of Pará, taking into consideration that tourism is as vector of ethnodevelopment, and it can also contribute to the conservation of Sociobiodiversity and local culture through experiences that will enable the realization of acquaintanceship, where there will be sharing of the daily activities of the customs of the local people, and cultural changes, which is the aim between visitors and the community, where these ones can promote the knowledge of non-indigenous people, and to consolidate the ethnic and cultural identity thereof too. Thus, this study guided by the participatory action research, it was used data obtained in 2012, that were results from the application of interviews with the community to make the diagnosis of tourism potential. It is an exploratory and descriptive research about the topic. The field research combined with participant observation, workshops and interviews contributed to it was possible to conduct a depth analysis about the environment studied. This research has the intention to obtain concrete results in the implementation and/or promotion of a cultural practice and environmentally sustainable ruled in organizational processes that permeates the guidelines of community-based tourism, however this depends on the conditions of human and forest resources, and infrastructure conditions in the community, providing in the short and medium terms, social activities and culturally positive for the culture of this people, and providing to long term, environmental and economic landmarks. As result, it was possible to identify that the community with its cultural events, parties and ceremonies being allied to their way of life and taken from their criteria, it is able to work with the tourism within their land and it can makes the tourism, a cultural affirmation opportunity and income generation. But, it concludes that for tourism to become ,in fact, there are required to be carried out some measures, that meets the new Regulatory Instruction IN 3/2015, this IN states that for the community to work with tourism in their land, it is necessary to be prepared a visitation plan that fits the established requirements. This research is constituted as an important tool in building this visitation plan, given that it was done from the community demand and it was conducted in a participatory manner, valuing the horizontal dialogue and the autonomy of this people.

O turismo de base comunitária como vetor de etnodesenvolvimento: a comunidade Mebêngôkre-Kayapó na Terra Indígena Las Casas - PA

This study aims to analyze the contribution that the future implementation of community-based tourism can provide to Mebengokre-Kayapo, people of the village Tekrejarôti, they re-inhabiting the indigenous land Las Casas, located in southern of Pará, taking into consideration that tourism is as vector of ethnodevelopment, and it can also contribute to the conservation of Sociobiodiversity and local culture through experiences that will enable the realization of acquaintanceship, where there will be sharing of the daily activities of the customs of the local people, and cultural changes, which is the aim between visitors and the community, where these ones can promote the knowledge of non-indigenous people, and to consolidate the ethnic and cultural identity thereof too. Thus, this study guided by the participatory action research, it was used data obtained in 2012, that were results from the application of interviews with the community to make the diagnosis of tourism potential. It is an exploratory and descriptive research about the topic. The field research combined with participant observation, workshops and interviews contributed to it was possible to conduct a depth analysis about the environment studied. This research has the intention to obtain concrete results in the implementation and/or promotion of a cultural practice and environmentally sustainable ruled in organizational processes that permeates the guidelines of community-based tourism, however this depends on the conditions of human and forest resources, and infrastructure conditions in the community, providing in the short and medium terms, social activities and culturally positive for the culture of this people, and providing to long term, environmental and economic landmarks. As result, it was possible to identify that the community with its cultural events, parties and ceremonies being allied to their way of life and taken from their criteria, it is able to work with the tourism within their land and it can makes the tourism, a cultural affirmation opportunity and income generation. But, it concludes that for tourism to become ,in fact, there are required to be carried out some measures, that meets the new Regulatory Instruction IN 3/2015, this IN states that for the community to work with tourism in their land, it is necessary to be prepared a visitation plan that fits the established requirements. This research is constituted as an important tool in building this visitation plan, given that it was done from the community demand and it was conducted in a participatory manner, valuing the horizontal dialogue and the autonomy of this people.

Expressão geofísica-estrutural do lineamento transbrasiliano na porção central da Bacia do Parnaíba (Maranhão-Piauí)

The objective of this study was to characterize the structural-geophysical expression of the Transbrasiliano Lineament (TBL) in the east-central portion of the Parnaíba Basin. The TBL corresponds to a major Neoproterozoic NE-trending shear zone related to the Brasiliano orogenic cycle, with dextral strike-slip kinematics, underlying (but also laterally exposed in the NE and SW basin edges) the sedimentary section of the Parnaíba Basin. In this study, the interpretation of gravity and magnetic anomaly maps is consistent with the TBL kinematics, the signature of the geophysical anomalies corresponding to the high (plastic behaviour) and subsequent declining temperature (ductile to brittle behaviour) stages during Brasiliano and late Brasiliano times. The pattern of residual gravity anomalies is compatible with an S-C dextral pair shaping the geological bodies of an heterogeneous basement, such as slices of gneisses and granulites (positive anomalies), granitic and low-medium grade metasedimentary rocks (negative anomalies). Such anomalies curvilinear trends, ranging from NNE (interpreted as S surfaces) to NE (C surfaces), correspond to flattening surfaces (S), while the NE rectilinear trend must represent a C band. The narrower magnetic anomalies also display NNE to NE (S surfaces) trends and should correspond to similar (although narrower and more discontinuous) sources in the equivalent anomaly patterns. Pre-Silurian pull-apart style grabens may contribute to the NE negative gravimetric anomalies, although this interpretation demands control by seismic data analysis. On the other hand, the curvilinear anomalies associated to contractional trends are incompatible with their interpretation as pre-Silurian graben, in both maps. In the (reduced to the pole) magnetic anomalies map, most of these are again associated to low-temperature shear zones (C planes) and faults, juxtaposing distinct blocks in terms of magnetic properties, or eventually filled with basic bodies. It is also possible that some isolated magnetic anomalies correspond to igneous bodies of late-Brasiliano or Mesozoic age. The basement late discontinuities pattern can be interpreted in analogy to the Riedel fractures model, with steep dipping surfaces and a sub-horizontal movement section. This study also explored 2D gravity modeling controlled by the interpretation of a dip seismic line as regards to the Transbrasiliano Lineament. The rock section equivalent to the Jaibaras Group occupying a graben structure (as identified in the seismic line) corresponds to a discrete negative anomaly superimposed to a gravimetric high, once again indicating a stronger influence of older crystalline basement rocks as gravimetric sources, mainly reflecting the heterogeneities and anisotropies generated at high temperature conditions and their subsequent cooling along the TBL, during the Brasiliano cycle.

Expressão geofísica-estrutural do lineamento transbrasiliano na porção central da Bacia do Parnaíba (Maranhão-Piauí)

The objective of this study was to characterize the structural-geophysical expression of the Transbrasiliano Lineament (TBL) in the east-central portion of the Parnaíba Basin. The TBL corresponds to a major Neoproterozoic NE-trending shear zone related to the Brasiliano orogenic cycle, with dextral strike-slip kinematics, underlying (but also laterally exposed in the NE and SW basin edges) the sedimentary section of the Parnaíba Basin. In this study, the interpretation of gravity and magnetic anomaly maps is consistent with the TBL kinematics, the signature of the geophysical anomalies corresponding to the high (plastic behaviour) and subsequent declining temperature (ductile to brittle behaviour) stages during Brasiliano and late Brasiliano times. The pattern of residual gravity anomalies is compatible with an S-C dextral pair shaping the geological bodies of an heterogeneous basement, such as slices of gneisses and granulites (positive anomalies), granitic and low-medium grade metasedimentary rocks (negative anomalies). Such anomalies curvilinear trends, ranging from NNE (interpreted as S surfaces) to NE (C surfaces), correspond to flattening surfaces (S), while the NE rectilinear trend must represent a C band. The narrower magnetic anomalies also display NNE to NE (S surfaces) trends and should correspond to similar (although narrower and more discontinuous) sources in the equivalent anomaly patterns. Pre-Silurian pull-apart style grabens may contribute to the NE negative gravimetric anomalies, although this interpretation demands control by seismic data analysis. On the other hand, the curvilinear anomalies associated to contractional trends are incompatible with their interpretation as pre-Silurian graben, in both maps. In the (reduced to the pole) magnetic anomalies map, most of these are again associated to low-temperature shear zones (C planes) and faults, juxtaposing distinct blocks in terms of magnetic properties, or eventually filled with basic bodies. It is also possible that some isolated magnetic anomalies correspond to igneous bodies of late-Brasiliano or Mesozoic age. The basement late discontinuities pattern can be interpreted in analogy to the Riedel fractures model, with steep dipping surfaces and a sub-horizontal movement section. This study also explored 2D gravity modeling controlled by the interpretation of a dip seismic line as regards to the Transbrasiliano Lineament. The rock section equivalent to the Jaibaras Group occupying a graben structure (as identified in the seismic line) corresponds to a discrete negative anomaly superimposed to a gravimetric high, once again indicating a stronger influence of older crystalline basement rocks as gravimetric sources, mainly reflecting the heterogeneities and anisotropies generated at high temperature conditions and their subsequent cooling along the TBL, during the Brasiliano cycle.

Vitalidade no centro antigo Teresina, Piauí Praça Marechal Deodoro: uma intervenção contemporânea em área de valor patrimonial

This study deals with the discussions of contemporary interventions in public spaces in areas of heritage value. The product of this dissertation is an Intervention Project to Marechal Deodoro Square located in Teresina/PI center. The starting point for understanding the theme of this study is to investigate the accessibility and vitality of a public space - through relationship between form and uses. The spatial properties of accessibility and visibility as well as the distribution of land use - factors were associated with distinct patterns of vitality - and compared to usage patterns observed in situ and statements from users obtained through the results of the questionnaires. In attention to questions about the building constructed, particularly in historical centers, considers the guidelines to define intervention strategies in the square, consisted in the development of simulations that after evaluation of results of redesign, was chosen the best option to meet the necessary requirements to the performance, considering the spatial properties of integration and visibility that meet these requirements. Therefore, the "Intervention Project" carried out for the Marechal Deodoro Square characterization proposed items are discussed: spatial structure, vegetation, road network, pavements, street furniture and lighting

Efeito da adição de carbonatos em formulação de massa para revestimento cerâmico utilizando matérias-primas do Piauí

Piauí state is a major producer of traditional red ceramic burning as bricks, tiles and ceramic tiles, with its main production center located in the city of Teresina. The state has large reserves of raw materials that can be used in the ceramic coating as clays, quartz, talc and carbonates. However, in the preparation of ceramic bodies using only a mixture of clays with different characteristics. The study aims to evaluate the effect of adding two types of carbonates in the ceramic semiporous mass coating produced in Piauí and then to verify the potential use of these carbonates as supplementary raw material product manufactured or the feasibility of obtaining a ceramic plate that meets the specifications for the porous coating. For this, were characterized the ceramic Piauí coating mass, a calcitic carbonate and a dolomitic, were made in the levels of 2, 4, 8, 16, and 32%. The masses were formed by pressing and burneds in two environments: a laboratory furnace (1080°C, 1120°C, 1140°C, and 1160°C) and an industrial furnace (1140°C). Then, following tests of linear shrinkage water absorption, apparent porosity, bulk density and flexural strength. Furthermore, the fired specimens were tested for their macrostructure and microstructure. The results showed the possibility of using the carbonate in ceramic mass flooring produced in Piauí, as added in small proportions improved dimensional stability and increased mechanical strength of ceramics pieces. It also proved itself possible to produce porous coating when added in higher levels