Artigos - Planejamento, Urbanismo e Ambiente - FCT

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The water and horticulture in Pirapozinho – SP
(2022-08-20) Aznar, Fábio Eduardo [UNESP]; Rizk, Maria Cristina [UNESP]; Universidade Estadual Paulista (UNESP)
The article describes the result of a work carried out with small vegetable growers in the municipality of Pirapozinho – SP, whose objective was to diagnose the use of water in the irrigation of vegetables. In the field research, 14 vegetable producers were interviewed, following a semi-structured script. The results of the work indicated the sprinkler irrigation system with micro sprinklers as the most used irrigation system. Groundwater, captured via semi-artesian wells, is the main source of supply, with an estimated average daily withdrawal between 100 liters/day to 5000 liters/day. There is a need to improve irrigation management, since it is carried out based on empirical criteria, not ensuring precision in water distribution, in addition to the need to guide producers on the importance of analyzing the quality of water used in irrigation, since most producers reported never having done it. Improving the use of water in vegetable irrigation in the municipality of Pirapozinho – SP necessarily involves working together with public agencies, rural extension agencies and vegetable producers.
The water and horticulture in Pirapozinho - SP
(Univ Fed Goias, Inst Estudos Socio-ambientais, 2022-08-01) Aznar, Fabio Eduardo [UNESP]; Rizk, Maria Cristina [UNESP]; Universidade Estadual Paulista (UNESP)
The article describes the result of a work carried out with small vegetable growers in the municipality of Pirapozinho - SP, whose objective was to diagnose the use of water in the irrigation of vegetables. In the field research, 14 vegetable producers were interviewed, following a semi-structured script. The results of the work indicated the sprinkler irrigation system with micro sprinklers as the most used irrigation system. Groundwater, captured via semi-artesian wells, is the main source of supply, with an estimated average daily withdrawal between 100 liters/day to 5000 liters/day. There is a need to improve irrigation management, since it is carried out based on empirical criteria, not ensuring precision in water distribution, in addition to the need to guide producers on the importance of analyzing the quality of water used in irrigation, since most producers reported never having done it. Improving the use of water in vegetable irrigation in the municipality of Pirapozinho - SP necessarily involves working together with public agencies, rural extension agencies and vegetable producers.
Geoenvironmental Analysis Under the Perspective of Geographic Information System (GIS) and Landscape Archaeology: Guarani and Kaingang Sites in the Anhumas Stream, Lower Paranapanema Region, SP
(2022-01-01) Figueiredo Daves, Larissa; Barrocá Faccio, Neide [UNESP]; Universidade de São Paulo (USP); Universidade Estadual Paulista (UNESP)
The relationship of society with the environment in past times shows the relevance of interdisciplinary studies between Geography and Archaeology. In this case, we discuss the landscape of Guarani and Kaingang archaeological sites located near the banks of Ribeirão Anhumas, Municipality of Narandiba, SP. Cartography and the logic used in GIS for spatial analysis were carried out with emphasis on location, distribution of archaeological remains, as well as to demonstrate the form of implantation of the indigenous site Guarani or Kaingang in the relief, thus contributing to the analysis of geoenvironmental contexts in interdisciplinary research, especially by the triad—Geography, Landscape Archaeology, and Cartography, through the study of material culture and the form of implantation of archaeological sites.
How does a short-term hydrological disturbance changes the phytoplankton assemblages of a small lake?
(2022-01-01) Granado, Danielli Cristina [UNESP]; Perbiche-Neves, Gilmar; Henry, Raoul [UNESP]; Universidade Estadual Paulista (UNESP); Universidade Federal de São Carlos (UFSCar)
Hydrologic pulses in marginal environments are disturbances that produce extensive changes in the phytoplankton community. Our aim was to analyze the effects of a disturbance in the phytoplankton structure of a small and shallow lake (Cavalos Lake), a marginal lentic ecosystem isolated from the Paranapanema River (São Paulo, Brazil), located in the river-lake transition zone of a large power-plant reservoir. Overall, 27 samples were collected every three days for three months at the high-water period. The results evidenced the predominance of Aphanocapsa spp. Nägeli in the two first months. The Cyanobacteria species presented biomass predominance of 80% for more than four weeks, which characterized a phase of environmental equilibrium. This phase was interrupted by an abrupt increase in the hydrometric level, with the destabilization of the planktonic community and favoring of opportunistic species such as Cryptomonas brasiliensis A. Castro, C.E.M Bicudo & D. Bicudo 1992, which had a biomass predominance of 40% in two samplings. Next, there was an increase in the peak for Botryococcus braunii Kützing 1849, followed by an increase in diversity. The significant increase in the water volume in the second half of the period, through underground flow (Paranapanema River → Cavalos Lake), was a disturbance that promoted the high diversity values found in the lake after flooding.
MICROBIOTA FUNGICA ANEMOFILA DA CIDADE DE PRESIDENTE PRUDENTE, ESTADO DE SAO PAULO, BRASIL
(1985-01-01) Buck, N.; Gambale, V.; Gambale, W.; Paula, C. R.; Universidade Estadual Paulista (UNESP)
Canopy height model generation from historical images for monitoring of regeneration in atlantic rain forest
(2019-01-01) Berveglieri, Adilson [UNESP]; Imai, Nilton Nobuhiro [UNESP]; Tommaselli, Antonio Maria Garcia [UNESP]; Martinez, Beatriz Fabretti [UNESP]; Universidade Estadual Paulista (UNESP)
3D reconstruction of forest canopy for retrospective studies over time is possible from historical aerial photographs using modern photogrammetric algorithms. This enables the structural change analysis in forested areas and the conservation or regeneration monitoring in degraded areas. In this context, the article presents an application of photogrammetric techniques (combined with a terrain model derived from a LASER point cloud) to generate tree height models. Two height models, one dating from 1978 and another from 2017, were produced to evaluate the regeneration of an Atlantic Rainforest forest. A segmentation based on superpixels was made in both heights models to subdivide the canopy into homogeneous regions (coincident between the two dates). A local statistical analysis was conducted based on a classification in three levels of heights, which was validated with data of field. As a result, it was found that deforested areas are regenerating; however, such areas present difficulties to grow to the highest canopy. The error in height, estimated in the historical surface model, was 0.55 m, which is acceptable for forest studies and is comparable to results obtained in boreal forests.
The main environmental impacts of a university restaurant and the search for solutions
(2018-01-01) Rizk, M. C. [UNESP]; Nascimento, D. B. [UNESP]; Perão, B. A. [UNESP]; Camacho, F. P.; Universidade Estadual Paulista (UNESP); Universidade Estadual de Maringá (UEM)
The objective of this study was to evaluate the food and water waste in a university restaurant. During the evaluated period, 18,083.08 kg of food were produced of which 17.85% had become solid waste that was disposed in the environment, being that US$ 1,079.65 of what was invested for production was lost. The consumption of water for the production of meals was 29.71 L, above the recommended level, contributes to a reduction of this natural resource, besides generating an additional amount of wastewater, increasing the volume of effluents dumped in the rivers. Thus, it is evident the need to develop actions aimed at optimizing the management of natural resources, reducing the waste and, consequently, the negative impacts caused by the restaurant’s activities. So, in order to minimize the impacts, environmental programs were designed to incorporate the principles of 4R (reduce, reuse, recycle and re-think).
Treatment of food waste from a university restaurant added to sugarcane bagasse
(2018-01-01) Rizk, M. C. [UNESP]; Bonalumi, I. P. [UNESP]; Almeida, T. S. [UNESP]; Camacho, F. P.; Universidade Estadual Paulista (UNESP); Universidade Estadual de Maringá (UEM)
Restaurants produce large-scale meals, generating large amounts of solid waste, which if not properly managed cause environmental and sanitary problems. Composting is one of the most recommended methods for the treatment of organic solid waste, since the wastes that would be disposed off in the environment, causing environmental and public health problems, are transformed into organic fertilizers. Thus, the present study had the objective of monitoring some physical-chemical parameters of the composting process of food waste from a university restaurant mixed to the sugarcane bagasse. The final values indicated that the moisture content is above that determined in the legislation, while the pH and the C/N ratio presented values very close to the reference values. In this way, it’s concluded that it is necessary more time of composting to adjust some parameters, so it will be possible to obtain an organic compost suitable for use in soil.
Landscape Archeology from a geosystemic perspective: the Piracanjuba archaeological site, municipality of Piraju, state of São Paulo, Brazil
(Editora da Universidade Federal de Uberlândia - EDUFU, 2021-06-09) Daves, Larissa Figueiredo; Faccio, Neide Barrocá [UNESP]; Universidade de São Paulo (USP); Universidade Estadual Paulista (Unesp)
Studies on the relationship between society and the environment in past time frames have shown the relevance of interdisciplinary research between Geography and Archeology. Based on the theoretical grounds of Landscape Archeology, this study investigates the Piracanjuba archaeological site, a Guarani lithoceramic site, located by the middle course of the Paranapanema River, in the municipality of Piraju, state of São Paulo, Brazil. Within the perimeter of the archaeological site under study, four anthropogenic soil patches (ASPs), also known as indigenous black earth, were identified. In terms of results, the study produced an analysis of the environment according to the horizontal (geofacies and geotopes) and vertical (geohorizons) geosystemic concepts, examining the site’s cartographic representation and spatialization as to its relationship with relevant characteristics of the physical-geographic complex of the studied area. This therefore contributes to further landscape analyses of archaeological sites, based on geoindicators, within past time frames. The heterogeneous stratification units evinced the distinguishing features of the studied environments according to the height of each vegetation stratum and their slope sinuosity and steepness towards the water body of the Paranapanema River. The analyses of the anthropogenic soil patches revealed, by means of thermoluminescence, disparity in the dating of the ceramic fragments found in ASP 1 reaching back to 1520 AD, and in the ASP 2 to 1355 AD, probably pointing to two periods of occupation of the archaeological site area.
Incorporation of PET wastes in rendering mortars based on Portland cement/hydrated lime
(2020-11-01) Spósito, Felipe A. [UNESP]; Higuti, Ricardo T. [UNESP]; Tashima, Mauro M. [UNESP]; Akasaki, Jorge L. [UNESP]; Melges, José Luiz P. [UNESP]; Assunção, Camila C. [UNESP]; Bortoletto, Marcelo [UNESP]; Silva, Rodrigo G. [UNESP]; Fioriti, Cesar F. [UNESP]; Universidade Estadual Paulista (Unesp)
Nowadays, the Polyethylene Terephthalate (PET) bottle, which is a post-consumer product, has generated a strong interest in the environmental consequences that surround it, and a suitable alternative is to incorporate it in mortar and concrete. Therefore, the aim of this research was to evaluate rendering mortars based on Portland cement/hydrated lime produced with PET bottle waste, used to partially replace 2.5%, 5%, 10%, 15% and 20% (by volume) of the fine aggregate in order to investigate the effectiveness and the improvement of these materials. The experimental program was performed in the fresh and hardened states, to determine flowability, fresh and hardened densities, air content, apparent porosity, water absorption by immersion, water retention, water absorption by capillarity, drying, water vapor permeability, ultrasonic wave velocity, and dynamic modulus of elasticity. Also, scanning electron microscopy (SEM) was performed. Generally, the results showed that the incorporation of PET significantly changed some properties, as verified by statistical analysis. Remarkable results from the incorporation of PET into rendering mortars based on Portland cement/hydrated lime are: close to 90% similarity of water retention between the mixtures, water absorption due to capillarity of M2.5 at 1.89 kg/(m2·min1/2), drying of the M15 specimen at 5.85 kg/m2, water vapor permeability of the M20 at 41.15 (ng/(m·s·Pa)) and the dynamic modulus of elasticity of M2.5 at 3.57 GPa. These replacements showed the possibility of mitigating the environmental impacts that the PET bottle life cycle can have and the extraction of the fine aggregate, promoting another possibility of disposal for this waste.
The complexity of the Amerindian settlement systems in the Western Plateau of Sao Paulo seen from archaeology: the contribution of LAG/MAR
(Revues Org, 2019-01-01) Faccio, Neide Barroca [UNESP]; Universidade Estadual Paulista (Unesp)
The Western Plateau of Sao Paulo State was once densely occupied by indigenous peoples. It is presented, here, the archaeological data of the indigenous occupations surveyed in the Western Plateau of Sao Paulo State, by the LAG (Laboratory of Guarani Archeology and Landscape Studies) and MAR (Museum of Regional Archeology) of FCT / UNESP (Faculty of Science and Technology / Paulista State University). In the Western Plateau of Sao Paulo State we find the Guarani and / or Tupi ethnic groups, Kaingang and Kayap6 Indians. The objective is to clarify the material culture, from the characterization of the objects, the form of the dwellings and the physical environment of these occupations, from which, although in an initial way, it's possible to know, at least in part, the characteristics of these indigenous groups.
NATIONAL SOLID WASTE POLICY DEPLOYMENT: THE CASE OF SETTLEMENT MUNICIPALITIES BETWEEN THE PUBLIC MINISTRY AND SERGIO MOTTA'S HYDROELECTRIC POWER STATION
(Univ Estadual Paulista Julio Mesquita Filho, 2020-01-01) Amaro, Aurelio Bandeira; Martin, Encarnita Salas [UNESP]; Iacia, Paulo Roberto; Okado, Matheus Naoto Archangelo [UNESP]; Inst Fed Educ Ciencia & Tecnol Sao Paulo IFSP; Universidade Estadual Paulista (Unesp); Fac Tecnol Presidente Prudente FATECPP
In the state of Sao Paulo, the Federal and State Public Ministries have filed a lawsuit against Companhia Energetica de Sao Paulo (CESP) due to failure to meet commitments design to mitigate environmental impacts caused by Sergio Motta's Hydroelectric Power Plant. This action led to a fine of $ 119 million earmarked for the 57 western towns of Sao Paulo. Part of these resources were intended for projects involving solid waste management. This article aims to report on implementation of the projects sponsored with resources for solid waste management in the municipalities concerned. To this end, plus a brief background, also describes its main actors, overcoming difficulties and the challenges yet to come. At last, it has been concluded that upon completion of work, waste management should improve significantly in the region, and due to its originality, agreement such as this is a model to be followed by Brazilians legal authorities and perhaps abroad.
Memories ignored: the beginning of Maringa from the perspective of popular housing
(Univ Estadual Londrina, 2019-07-01) Garcia, Tatiane Boisa [UNESP]; Souza Cordovil, Fabiola Castelo de; Universidade Estadual Paulista (Unesp); Universidade Estadual de Maringá (UEM)
Based on local historical formation, the present article analyzes the beginning of Maringa, emphasizing guiding principles and state actions in relation to popular housing during the structuring of the urban territory. It was tried to establish from a historiographic research a discourse that permeated by the trajectory of the state actions, of the involved agents, of the discourses, of the conflicts, of the orientations of the urbanistic legislations and of the results in the urban territory of Maringa from 1947 until 1964. The principles that guided the initial plan of Jorge de Macedo Vieira and later the actions of the municipal public power formalize in their urban structure an excluding genesis with initiatives disconnected from a public housing policy and that only responded to the real estate pressures and the ideal of a beautiful, modern and absent city of ills. The official historiography of the beginning of Maringa scarcely exposes the reality of the low-income population, however, since its origin, the city was overflowing with social problems and various precarious and extreme poverty centers were developed systematically ignored in local urban history.
Investigation of historic, constructive, spatial and pathological aspects regarding the IBC (Instituto Brasileiro do Cafe) in Presidente Prudente, Brazil
(Univ Politecnica Valencia, Editorial Upv, 2019-12-01) Grothues, Laura Karin; Fioriti, Cesar Fabiano [UNESP]; Tech Univ Dortmund; Universidade Estadual Paulista (Unesp)
In this case study the building of the Brazilian Institute of Coffee (IBC) in Presidente Prudente, Brazil, will be presented. The building was built in the 1940s for the usage of storing coffee. The timber construction is more than 70 years old, which make the shed a historically important heritage to the city. After the revitalization process the building is used as an event center nowadays. The special thing about the architecture of the IBC consists in the construction as a series of wooden latticed porticos. These porticos are still functional and visually appealing, but after so many years of use, they suffer from pathological manifestations. To gain more knowledge about which problems are common in the wooden construction all the porticos were examined in detail. The investigation process revealed, that every portico is affected by at least one of the anomalies studied, even though the degree varies from portico to portico. In addition to the research about the interior of the building, its surrounding was analysed. The urban location and the proximity to other cultural hotspots mean a great chance for the IBC, which should be taken. Comparing the IBC to the cultural center and former coal mine Zollverein in Germany, it becomes clear, that there are several opportunities to reuse a historic building and bind it into city structure. Finally, a critical reflexion of the revitalization process, of the current use and the embedding of the IBC in the environment shows several weaknesses, which could be improved through maintenance and an overall planning concept.
Regime jurídico dos espaços territoriais
(Privado, 2020) Castilho, José Roberto Fernandes
Trata-se texto de síntese a respeito da configuração jurídica do espaço territorial, com suas várias classificações.
Mother-to-child transmission and gestational syphilis: Spatial-temporal epidemiology and demographics in a Brazilian region
(Public Library Science, 2019-02-01) Souza, Joyce Marinho de [UNESP]; Giuffrida, Rogerio; Marques Ramos, Ana Paula; Morceli, Glilciane; Coelho, Camila H.; Pimenta Rodrigues, Marcus Vinicius; Univ Oeste Paulista; Universidade Estadual Paulista (Unesp); NIAID
Syphilis is a Sexually Transmitted Infection (IST) with significant importance to public health, due to its impact during pregnancy (Gestational SyphilisGS); especially because syphilis can affect fetus and neonates' development (mother-to-child transmissionMTCT of syphilis), by increasing susceptibility to abortion, premature birth, skeletal malformations, meningitis and pneumonia. Measures to control and eliminate MTCT of syphilis have failed on the last few years in Brazil and this research aimed to identify the seasonality of notified cases of syphilis in a region of SAo Paulo state. The studied region, Pontal do Paranapanema, comprises 32 cities located in the West of SAo Paulo state, in Brazil. Data collected from the National System of Aggravations and Notification (SINAN) website was used to calculate the incidence rate of GS and MTCT. The incidence rate of GS was acquired dividing number of cases by number of women in each municipality and MTCT using number of live births in each year (from 2007 to 2013) in each municipality. This result was then, standardized multiplying incidence rate by 10,000 and expressed as incidence/10,000 women or live births, for GS and MTCT, respectively. To identify possible endemic/epidemic periods, a control diagram was performed using the standard deviation (SD) of incidence rate. Thematic maps representing the spatial distribution of incidence rates were constructed using a Geographic Information System software (GIS, based on cartographic vector available on the Brazilian Institute of Geography and Statistics (IBGE) website. Eighty cases of GS and 61 cases of MTCT were notified in the studied region. An increase of GS notification was detected in the Pontal do Paranapanema in 2011 followed by an increase in number of MTCT cases in the subsequent year, suggesting inefficacy in the treatment during gestational period. Most of those cases were reported on February and November which suggested seasonality for this IST in the region. The control diagram, based on the inputs collected from SINAN, showed no endemic period; however, the most susceptible month to happen an endemic event of GS and MTCT was February. Our study provided a new methodology to understand the syphilis dynamics as a potential tool to improve the success of future measures to control and possibly eliminate MTCT of syphilis. Author summary Syphilis is a sexually transmitted infection that can be transmitted to child during pregnancy, or postpartum, by an infected mother. Syphilis in children can interfere in the development and, in some cases, may lead to death. We analyzed cases of syphilis during pregnancy and mother-to-child transmission of syphilis from 2007 to 2013 occurred in a Brazilian region. We used a public online website provided by the Brazilian government to obtain information about cases, generate map locations and design a transmission pattern in the region. During the period investigated, we identified 80 cases of syphilis in pregnant woman and 61 related to mother-to-child transmission, both notified mainly during Summer (from November to February). Children infection might be related to incorrect treatment of mother and the partner. Not only the mother must be treated but the partner as well, otherwise women may be infected during pregnancy, transmitting syphilis to fetus. This study may help in the establishment of measures to control and eliminate mother-to-child transmission of syphilis.
THE INDIGENOUS LEGACY OF THE IEPE MUNICIPALITY, SP: PROTECTION, DISSEMINATION AND MANAGEMENT OF ITS ARCHAEOLOGICAL SITES
(Univ Estadual Paulista Julio Mesquita Filho, 2019-05-01) Montardy, Lisandra Hernandez [UNESP]; Faccio, Neide Barroca [UNESP]; Universidade Estadual Paulista (Unesp)
This article reflects on the indigenous legacy of the Municipality of Iepe considering the processes of protection, dissemination and management of its archaeological sites, as well as the creation of the Museum of Archeology of Iepe as an expression of the interest of the local population and the Municipality of Iepe to expand respect for this heritage through its knowledge and appreciation. In the same one the actions of patrimonial education developed in the municipality within the frame of the projects of university extension of the Faculty of Sciences and Technology of the State University Paulista Julio de Mesquita Filho Campus of Presidente Prudente: Museum/University: the extroversion of the knowledge and Prehistory counted through objects. Reflecting on the importance of the patrimonial education program carried out in this context and its focus on sensitization in the school scope of elementary and secondary education of students and teachers with the archaeological riches and the indigenous memory of the West Paulista, promoting the popularization of this knowledge as part strengthening the feelings of identity of the region's population.
Risco de lesões de ombro em cortadores de cana-de-açúcar: Análise baseada na simulação dos movimentos
(2017-01-01) Messias, Iracimara de Anchieta [UNESP]; de Andrade, Fabiana Rodrigues [UNESP]; Artero, Almir Olivette [UNESP]; Nóbrega, Líria Akie Okai de Albuquerque; Universidade Estadual Paulista (Unesp); Universidade Federal de Minas Gerais (UFMG)
AIMS: To evaluate whether the amplitude angles of shoulder flexion and abduction, in the movements performed during a simulation of the sugarcane cutting task, exceed the limits considered safe. METHODS: Non-randomized controlled simulations of the movement of sugarcane cutting were performed in volunteers recruited among university students. Inclusion criteria were (a) male sex; (b) age between 21 and 40 years; (c) right handed; (d) without orthopedic and/or neurological impairment; (e) physical characteristics and a history of work activities similar to that of sugarcane cutters; (f) performing aerobic physical activity at least three times a week in the last six months. The exclusion criteria were (a) presence of pain during the tests; and (b) inability to perform the movement. The study was carried out in the laboratory of occupational biomechanics of the Center for Study and Research in Ergonomics of the School of Science and Technology of the State University of São Paulo. The kinematic data were collected by the Vicon® Three-Dimensional Movement Analysis System. The movements of flexion and abduction of the right shoulder were measured and classified. The parameters used as reference to evaluate the results were those published by the Ministry of Health of Brazil, which synthesizes the safe limits of amplitude of these movements. RESULTS: Ten subjects were evaluated, with a mean age of 24.5±4.78 years. A total of 39 samples obtained with the movement repetitions were analyzed during an average period of 30 seconds. The angle of shoulder in flexion remained above 30 degrees during 98.18% of the task execution time, above 45 degrees during 88.84%, above 60 degrees during 42.19% and above 90 degrees during 7.72% of the time. The abduction angle remained above 60 degrees throughout all the time and above 90 degrees during 57.59% of the time. In the amplitude of movement spikes, abduction apertures with angles greater than 100 degrees were observed. CONCLUSIONS: During most of the time of the experiments that simulated the movement of sugarcane cutting, the flexion and abduction angles of the shoulder were above those considered safe, indicating that the activity performed by sugarcane cutters has a strong potential to cause damage to the shoulder joint.
Comportamiento de tubos circulares de hormigón simple producidos con adición de caucho de neumáticos
(2016-04-01) Akasaki, J. [UNESP]; Fioriti, C. [UNESP]; Queiroz, R. [UNESP]; Fugii, A. [UNESP]; Pinheiro, J. [UNESP]; Universidade Estadual Paulista (Unesp)
In this work we have studied the performance of simple concrete pipes produced with the incorporation of rubber tires with contents of 10, 15 and 20 kg/m3 of concrete. The experimental program included diametral compression strength and water absorption tests. Twelve pipes were tested and divided into four sets of three pipes of nominal diameter (ND) of 600 mm and length of 1500 mm. Each series consisted of three pipes stub and bag (SB), one control (without rubber tires), and three sets incorporating rubber pipes on the trace (TB1, TB2 and TB3). All test results showed diametrical compressive strength values higher than that specified the NBR 8890 standard, with respect to simple concrete pipes PS2 class: type SB with ND 600 mm, which is 36 kN/m. In the water absorption test all pipes had absorption values less than the maximum established in the NBR 8890 standard, which is 8%. It can be concluded from the results and specific conditions of the tests conducted, that the tire rubber has the potential to be incorporated into the manufacture of simple concrete pipes. However, it is stated that it is necessary to increase the knowledge about the behavior of concretes incorporating rubber tire.
Cinza de bagaço de cana-de-açúcar (CBC) como adição mineral em concretos para verificação de sua durabilidade
(2015-10-01) Fernandes, Sérgio Eduardo [UNESP]; Tashima, Mauro Mitsuuchi [UNESP]; de Moraes, João Cláudio Bassan [UNESP]; Istuque, Danilo Bordan [UNESP]; Fioriti, Cesar Fabiano [UNESP]; Melges, José Luiz Pinheiro [UNESP]; Akasaki, Jorge Luis [UNESP]; Universidade Estadual Paulista (Unesp)
The sugar-alcohol sector has been expanding in recent years, mainly by the advent of bioenergy. In Brazil, the production of sugarcane is increasing in areas before used for extensive cattle and other important crops, such as soybeans, corn and orange. In addition concerns about the generation of electricity by burning the bagasse (co-generation) and the use of ethanol as a fuel for motor vehicles. However, production of sugar, alcohol and energy from sugarcane can cause environmental problems due to the generation of waste, as the sugarcane bagasse ash (SCBA). In this way, this paper presents a viability study of using this ash from sugarcane bagasse obtained inthepower generation as mineral admixture in concrete. In this study, chemical characterization tests and x-ray diffraction of SCBA were carried out. Concrete were molded with SCBA replacing partially the fine aggregate, in mass, in the following percentages: 5%, 10%, 15% and 20%. Mechanical tests were carried out, and from the best results, were assessed indurability tests: resistance to chemical attack, wicking, chloride penetration and abrasion. The study was conductedthat SCBA presents low pozzolanic activity, however, the results indicated that the SCBAcould use as partial replacement of fine aggregate in the production of concrete, because its results are similar to reference concrete without the ash.

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