Journal of Urban Technology and Sustainability最新文献_第2页

Discurso sustentável e a prática de remanejamento: Estudo de caso em intervenção habitacional do Programa de Aceleração do Crescimento em Belém (PA) 可持续话语与搬迁实践:belem (PA)增长加速计划住房干预案例研究

Journal of Urban Technology and Sustainability Pub Date : 2020-12-01 DOI: 10.47842/JUTS.V3I1.26

M. D. Castro

{"title":"Discurso sustentável e a prática de remanejamento: Estudo de caso em intervenção habitacional do Programa de Aceleração do Crescimento em Belém (PA)","authors":"M. D. Castro","doi":"10.47842/JUTS.V3I1.26","DOIUrl":"https://doi.org/10.47842/JUTS.V3I1.26","url":null,"abstract":"Remanejamentos urbanos têm sido as práticas mais comuns para reduzir a quantidade de assentamentos precários vulneráveis do ponto de vista socioambiental na Região Metropolitana de Belém nas últimas décadas, mas seus resultados e efetividade ainda são discutíveis. Este artigo procura analisar as interpretações discursivas e aproximações ao conceito de sustentabilidade urbana em uma intervenção de habitação de interesse social oriunda do Programa de Aceleração do Crescimento (PAC) em Belém (PA), a partir do Projeto de Trabalho Técnico Social (PTTS), visando estabelecer nexos de sustentabilidade entre a população atendida pelo Programa durante a realização das obras da intervenção – o Projeto Taboquinha, localizado no distrito de Icoaraci. Foi utilizada pesquisa qualitativa a partir dos projetos técnicos, documentos, além de entrevistas semiestruturadas com técnicos elaboradores e executores. Percebe-se que em relação à sustentabilidade, tomando por base a categoria lazer, foco do estudo, o Projeto reproduz espaços sem relação com as vivências materiais e substantivas dos sujeitos atendidos, desconsiderando suas necessidades e práticas cotidianas.","PeriodicalId":444694,"journal":{"name":"Journal of Urban Technology and Sustainability","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127918031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

APPLICATION OF GRAPHENE OXIDE IN CEMENTITIOUS COMPOSITES FOR CEMENT CONTENT REDUCTION 氧化石墨烯在水泥复合材料中降低水泥含量的应用

Journal of Urban Technology and Sustainability Pub Date : 2018-12-26 DOI: 10.47842/juts.v1i1.6

R. Salvador, Roberto Munhoz Bueno, D. Rambo, S. Martini

{"title":"APPLICATION OF GRAPHENE OXIDE IN CEMENTITIOUS COMPOSITES FOR CEMENT CONTENT REDUCTION","authors":"R. Salvador, Roberto Munhoz Bueno, D. Rambo, S. Martini","doi":"10.47842/juts.v1i1.6","DOIUrl":"https://doi.org/10.47842/juts.v1i1.6","url":null,"abstract":"Cement production is responsible for 5% of CO2 emissions worldwide. The concern about the pollution derived from the construction industry has brought attention to the need of developing more sustainable construction materials and processes. Admixtures based on nanometric graphene oxide have the potential to enhance mechanical properties and durability of cementitious composites. In this context, an experimental program was conducted to evaluate how the addition of graphene oxide may be used to reduce cement content in concretes, maintaining the same mechanical properties of conventional concretes (control matrices, with no graphene oxide additions). Kinetics of hydration of cement pastes was evaluated by isothermal calorimetry, phase evolution during hydration was determined by X-ray diffraction coupled with quantitative Rietveld analysis and mechanical properties were evaluated by compressive strength. Results indicate that graphene oxide additions provide a faster hydration rate until 24 h and generate a larger amount of C-S-H gel, increasing mechanical strength of the matrix. By the addition of graphene oxide dispersion (0.4% of solid content) at 0.02% by cement weight, cement content reductions of up to 15% may be achieved, maintaining the same compressive strength as the control matrices. From this research, a reduction in cement content to obtain more sustainable construction materials and processes may be achieved.","PeriodicalId":444694,"journal":{"name":"Journal of Urban Technology and Sustainability","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124534163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MACROMOLECULAR AND AROMATIC CHARACTER INFLUENCE OF SBR ON THE RHEOLOGICAL PROPERTIES OF WELL CEMENT SLURRIES SBR的大分子和芳香特性对井水泥浆流变性能的影响

Journal of Urban Technology and Sustainability Pub Date : 2018-12-11 DOI: 10.47842/juts.v1i1.8

Mostafa Aboelkheira, Celeste Siqueira, F. G. Souza Jr., R. Toledo

引用次数: 1

EFFECT OF SPECIMEN SHAPE ON THE COMPRESSIVE PARAMETERS OF STEEL FIBER REINFORCED CONCRETE AFTER TEMPERATURE EXPOSURE 温度暴露后试件形状对钢纤维混凝土压缩参数的影响

Journal of Urban Technology and Sustainability Pub Date : 2018-12-11 DOI: 10.47842/juts.v1i1.7

R. Serafini, F. P. Santos, R. R. Agra, A. Fuente, A. Figueiredo

引用次数: 2

Application of surface modifiers in ceramic tile to improve adhesion strength with mortars 表面改性剂在瓷砖中提高与砂浆粘结强度的应用

Journal of Urban Technology and Sustainability Pub Date : 1900-01-01 DOI: 10.47842/juts.v2i1.10

Bruna Bulzico, Maurício M. Resende, C. Herrera-Mesen

引用次数: 0