Orientador: Jorge Luís Akasaki / Resumo: O gesso é o material sintético construtivo mais antigo que se tem notícia, e sua ampla utilização é devido as suas boas propriedades termoacústicas e de resistência ao fogo. No Brasil, seu emprego concentra-se em forros, revestimentos e paredes divisórias, conhecidas como gesso acartonado. Todavia, o gesso é um material sobre o qual existe pouco conhecimento ao nível da investigação. E este projeto se propõe a estudar mais esse material, através da confecção de compósitos a base de gesso com a incorporação de borracha de pneus, tornando-o assim um material sustentável. A borracha proveniente do processo de recauchutagem de pneus inservíveis tem ampla aplicação em pesquisas com concretos e argamassas; porém pouco se sabe sobre sua aplicação no gesso. Para atingir o objetivo proposto nesse trabalho serão feitos ensaios de microscopia eletrônica de varredura, resistência à ruptura na flexão, resistência à compressão, dureza superficial, absorção de água, densidade superficial de massa, consistência (mini-slump) e comportamento térmico. Dessa maneira, é possível afirmar que a incorporação de borracha pode ser interessante para a produção de placas de gesso, uma vez que pode incorporar um resíduo sem destino totalmente adequado, produzindo placas com características semelhantes das já utilizadas e ainda contribuindo em aspectos como densidade, dureza superficial e isolamento térmico. Sendo assim, dentre as granulometrias utilizadas neste estudo, a borracha grossa pode ser consider... (Resumo completo, clicar acesso eletrônico abaixo) / Mestre

Submitted by Nayra Alberici Pinto null (nayra_alberici@hotmail.com) on 2017-07-19T18:45:02Z No. of bitstreams: 1 dissertação nayra completa.pdf: 5169626 bytes, checksum: 36827a2bda72e89406c13683ad5a0b5d (MD5) / Approved for entry into archive by Luiz Galeffi (luizgaleffi@gmail.com) on 2017-07-19T19:11:12Z (GMT) No. of bitstreams: 1 pinto_na_me_ilha.pdf: 5169626 bytes, checksum: 36827a2bda72e89406c13683ad5a0b5d (MD5) / Made available in DSpace on 2017-07-19T19:11:12Z (GMT). No. of bitstreams: 1 pinto_na_me_ilha.pdf: 5169626 bytes, checksum: 36827a2bda72e89406c13683ad5a0b5d (MD5) Previous issue date: 2017-05-30 / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / O gesso é o material sintético construtivo mais antigo que se tem notícia, e sua ampla utilização é devido as suas boas propriedades termoacústicas e de resistência ao fogo. No Brasil, seu emprego concentra-se em forros, revestimentos e paredes divisórias, conhecidas como gesso acartonado. Todavia, o gesso é um material sobre o qual existe pouco conhecimento ao nível da investigação. E este projeto se propõe a estudar mais esse material, através da confecção de compósitos a base de gesso com a incorporação de borracha de pneus, tornando-o assim um material sustentável. A borracha proveniente do processo de recauchutagem de pneus inservíveis tem ampla aplicação em pesquisas com concretos e argamassas; porém pouco se sabe sobre sua aplicação no gesso. Para atingir o objetivo proposto nesse trabalho serão feitos ensaios de microscopia eletrônica de varredura, resistência à ruptura na flexão, resistência à compressão, dureza superficial, absorção de água, densidade superficial de massa, consistência (mini-slump) e comportamento térmico. Dessa maneira, é possível afirmar que a incorporação de borracha pode ser interessante para a produção de placas de gesso, uma vez que pode incorporar um resíduo sem destino totalmente adequado, produzindo placas com características semelhantes das já utilizadas e ainda contribuindo em aspectos como densidade, dureza superficial e isolamento térmico. Sendo assim, dentre as granulometrias utilizadas neste estudo, a borracha grossa pode ser considerada a que teve melhor desempenho, uma vez que apresentou características de ser mais trabalhável, menos absorvente e mais isolante termicamente, além de apresentar resistências à compressão e a flexão adequadas para sua utilização (não estrutural), menores mossas e maior leveza do material. / Gypsum is the oldest constructive synthetic material ever heard, and their widespread use is due to its good thermoacoustic properties and fire resistance. In Brazil, its use is focused on linings, coating and partitions, known as drywall. However, the gypsum is a material on which there is little knowledge in terms of research. And this project aims to study more this material through the production of composite gypsum with tire rubber incorporation, thus making it a sustainable material. The rubber from the retreading process scrap tires has wide application in research on concrete and mortar; but little is known about its application in gypsum. In order to reach the objective proposed in this work, scanning electron microscopy, flexural strength, compressive strength, surface hardness, water absorption, bulk density, consistency (mini-slump) and thermal behavior will be performed. In this way, it is possible to affirm that the incorporation of rubber can be interesting for the production of gypsum boards, since it can incorporate a residue without destination completely, producing plates with characteristics similar to those already used and still contributing in aspects such as density, surface hardness and thermal insulation. Thus, among the granulometries used in this study, the thick rubber can be considered the one that had better performance, since it presented characteristics of being more workable, less absorbent and more thermally insulating, besides presenting resistance to compression and flexion adequate for its use (non-structural), smaller dents and greater lightness of the material. / FAPESP: 2015/17658-4

A extração cada vez maior de recursos da natureza e o grande volume de lixo descartado nos aterros sanitários alertam para a necessidade de se promover a reciclagem e a reutilização de resíduos para se gerarem novos materiais, inclusive, no setor da construção civil. Com base nisso e a partir de um estudo sobre as obras arquitetônicas em que Shigeru Ban construiu painéis de vedação com tubos de papelão, este trabalho desenvolveu uma proposta de painéis de vedação vertical de tubos de papelão e fez uma avaliação do seu desempenho estrutural visando a sua utilização no Brasil. Foram realizados ensaios técnicos para avaliar o painel de vedação vertical de tubos de papelão proposto, no que se refere à sua resistência mecânica e ao seu comportamento quando submetido às principais ações sofridas por um painel de vedação vertical. Também foi construída uma célula-teste para avaliar o desempenho técnico e estrutural do painel de vedação vertical de tubos de papelão proposto quando submetido a situações reais de exposição. Os dados obtidos em ambas as avaliações foram levados em consideração para verificar o desempenho geral do painel que se propôs, possibilitando concluir se este é apto ao seu emprego na construção civil no Brasil, e sugerir alguns usos e aplicações para o mesmo. / The increasing extraction of nature resources and the large volume of waste discarded in landfills call for the need to promote recycling and reuse of waste to create new materials, inclusive in the construction industry. Considering this aspect and from a study of the architectural masterpieces where Shigeru Ban built sealing cardboard tubes panels, this study developed a proposal for vertical sealing cardboard tubes panels and assessed their structural performance having in mind their use in Brazil. Technical tests were conducted to evaluate the proposed vertical sealing cardboard tubes panel regarding its mechanical resistance and behavior when submitted to the main actions suffered by a vertical sealing panel. A test cell was also built to evaluate the structural and technical performance of the proposed vertical sealing cardboard tubes panel when submitted to real exposure situations. Data obtained in both evaluations were taken into consideration to verify the general performance of the proposed panel, allowing to conclude whether this is suitable for being used in civil construction in Brazil, and to suggest some usage and applications for it.

Durch die Novellierung der AbfKlärV im Jahr 2017 wurde die bodenbezogene Nutzung von Klärschlamm stark eingeschränkt. Dadurch rückt dessen thermische Verwertung zunehmend in den Vordergrund, wobei durch eine Mitverbrennung Nährstoffe verloren gehen. Diese Arbeit betrachtet alternative Möglichkeiten zur stofflichen Verwertung, wie den Einsatz als Rekultivierungsmaterial auf Deponien in Form von Komposten. In die Arbeit fließt die Betrachtung von Pilzkultursubstraten als weiterer Zuschlagstoff ein, da diese aufgrund von Hygienisierungsvorschriften ebenfalls meist thermisch verwertet werden und auch hier wichtige Nährstoffe verloren gehen. Weiterhin wird untersucht, ob Deponieflächen generell für den Anbau von Bewuchs geeignet sind und insbesondere, ob auf derartig rekultivierten Flächen Rohstoffgewinnung aus Energiepflanzen möglich ist. Dafür wurden verschiedene Materialmischungen hergestellt und in Pflanzversuchen unter Laborbedingungen sowie im Freiland und in geotechnischen Versuchen auf ihre Eignung überprüft. Es wird gezeigt, dass Deponien ein Flächenpotential darstellen und diese auch für Bewuchs geeignet sind. Auch eignen sich die hergestellten Materialmischungen grundsätzlich als Rekultivierungsmaterial. Diese müssen aber in zukünftigen Versuchen in Hinsicht auf die Einhaltung von Grenzwerten und bspw. deren Wasserdurchlässigkeiten weiter angepasst werden, bevor die Mischungen produktiv im großen Maßstab einsetzbar sind.

Thesis (MEng)--Stellenbosch University, 2013. / Please see accompanying Errata document to be viewed with original document. / ENGLISH ABSTRACT: The current housing backlog facing the informal residents of South Africa is daunting. With current research showing that the backlog is not shrinking fast enough, the stakeholders of the formal and informal housing sector are facing an immense challenge. Most houses constructed after 1994 utilised conventional brick and mortar construction, with alternative means of building homes taking up a negligible share in the total housing supply. The purpose of this study is to test the feasibility of container-based homes as an alternative to brick and mortar homes in South Africa’s low-cost housing supply according to the triple constraints of project management i.e. cost, time and quality. Social acceptance and environmental sustainability are also analysed as two secondary parameters that will influence container-based projects. These parameters form the basis of the three pillars of sustainability, i.e. economic, societal and environmental parameters, which indicates the feasibility of a new design implementation. Two test cases for the feasibility study were designed. The first case considers a modular single-storey residential home, equivalent to standard “Breaking New Ground” housing solutions. The second test case considers a multi-storey, medium-density residential building, capable of housing multiple families .The test cases represent possible container-based solutions, with traditional brick and mortar construction (single and multi-storey) acting as the control solution. The three sustainability parameters act as benchmarks of each solutions’ feasibility, with the control solution acting as the counter-performance example. The comparison of the economic parameter relies on the cost of each design case, its construction time and the quality of the end-product. The bills of quantities were measured against a conventional building type, and it was found that a single-storey solution will prove more costly than a small brick and mortar home. However, the multi-storey solution proves to be feasible when compared to a concrete three-storey structure. Regarding time, the construction of an Intermodal Steel Building Unit (ISBU) home is up to 3 times faster compared to a conventional house. The end-product quality will depend on the quality system used by the contractor and its correct implementation; thus it is not an important dividing factor when comparing conventional versus Alternative Building Technology (ABT) systems. The societal parameter of an ISBU solution rests on its acceptance by the beneficiaries. Traditionally, resistance has met ABT home implementation, as stakeholders consider them as inferior products. A comprehensive survey was carried out in an informal settlement to test this statement. The results show that the majority of beneficiaries prefer conventional homes, unless the ABT home resembles its conventional counterpart. The environmental sustainability of a new product relies primarily on the carbon footprint of the materials and methods used. This was tested by comparing the impact of an ISBU solution with a conventional solution. The “upcycling” (as opposed to recycling) of used containers provides a large environmental benefit when comparing it to newly constructed brick for conventional homes, and thus the impact is lower. The findings of the study show that a single-storey solution utilising containers proves ineffective, as it is more expensive per square meter than a conventional home. However, a multi-storey container solution is feasible, as it is lower in cost (than comparative conventional solutions), faster to construct, allows for higher density expansion of settlements and is more environmentally friendly. / AFRIKAANSE OPSOMMING: Die enorme behuisingsagterstand van informele nedersetters in Suid-Afrika skep 'n geweldige uitdaging vir die rolspelers in die formele behuisingsektor. Huidige navorsing toon dat hierdie agterstand nie vinnig genoeg verminder nie, en baie mense verkeer in nood. Die meerderheid van huise wat opgerig is sedert 1994 maak gebruik van konvensionele baksteen en sement konstruksie, terwyl alternatiewe maniere van konstruksie 'n nietige aandeel het. Die doel van hierdie studie is om die bruikbaarheid van skeepshouer-gebaseerde huise te bepaal in teenstelling met konvensionele baksteen en sement huise, spesifiek vir die lae-koste behuisingsgeval in Suid-Afrika. Dit word uitgevoer volgens die "drietallige beperking" beginsel van projekbestuur, naamlik koste, tyd en kwaliteit parameters. Addisioneel word die sosiale aanvaarbaarheid sowel as die omgewingsvriendelikheid van die konsep getoets teen konvensionele maniere van konstruksie. Hierdie parameters vorm saam die “drie pilare van volhoubaarheid”, wat betrekking het tot ekonomiese-, sosiale- en omgewings-aspekte. Twee toetsgevalle is ontwerp volgens argitektoniese en tegniese standaarde sowel as gemeenskap benodigdhede. Die eerste geval is ontwerp as 'n enkel-verdieping huis, met behulp van modulêre skeepshouers. Die tweede geval is 'n meertallige-verdieping, medium-digtheid residensiële gebou wat verskeie families kan huisves. Die toetsgevalle modelleer verskeie skeepshouer oplossings, terwyl konvensionele konstruksie oplossings dien as beheer gevalle. Elke geval word volgens die drie volhoubaarheids beginsels getoets, met die beheer gevalle wat dien as die teen-prestasie voorbeelde. Die vergelyking van die ekonomiese parameter berus op die koste van elke ontwerp, sy konstruksietyd en die eindproduk kwaliteit. Die lys van hoeveelhede is gemeet teen dié van ʼn konvensionele huis, en daar is bevind dat die enkelverdieping skeepshouer-geval veel duurder sal wees. Die meertallige-verdieping geval aan die ander kant, maak gebruik van baie kostebesparings metodes, en lyk uitvoerbaar. Die tyd-aspek wys dat die konstruksie m.b.v. “Intermodal Steel Building Units” (ISBUs) tot en met 3 keer vinniger te wees teenoor ʼn konvensionele huis. Die eindproduk kwaliteit hang af van die tipe kwaliteit stelsel wat die kontrakteur gebruik, sowel as die korrekte toepassing van hierdie stelsel; dus is dit nie ʼn skeidende faktor tussen alternatiewe en konvensionele boumetodes nie. Die gemeenskaplike aspek van die gebruik van alternatiewe konstruksie berus op die aanvaarding van die huisbewoners. Gemeenskappe het tradisioneel nie ʼn hoë dunk van Alternatiewe Bou-Tegnologie (ABT) behuising nie, aangesien hulle dit as swak kwaliteit bestempel. Om hierdie stelling te toets is ʼn opname uitgevoer in ʼn informele nedersetting. Die resultate wys dat die meerderheid inwoners die konvensionele opsie verkies. Daar is wel bevind dat die inwoners ʼn ISBU huis sal oorweeg indien dit ʼn visuele ooreenkoms toon met ʼn konvensionele huis. Die omgewingsvolhoubaarheid van ʼn nuwe produk berus hoofsaaklik op die koolstof-voetspoor van die materiale en boumetodes wat gebruik is. Hierdie aspek is getoets deur ʼn ISBU oplossing se omgewings-impak te meet teen dié van ʼn konvensionele huis. Die “upcycling” voordeel wat skeepshouers gebruik gee ʼn groot voordeel teenoor die konstruksie van konvensionele huise, siende dat min nuwe materiale gebruik word. Dus is die totale omgewings impak laer as die van ʼn konvensionele huis. Die bevindinge van die navorsing wys dat ʼn enkelverdieping ISBU oplossing onprakties is in terme van koste per vierkante meter, aangesien dit veel duurder as ʼn konvensionele metode is. Die meertallige-verdieping geval is wel uitvoerbaar, aangesien dit ʼn laer koste tot gevolg het, vinniger gebou word, hoër-digtheid behuising bevorder en meer omgewings-vriendelik is.

Die weltweite Veränderung der klimatischen Bedingungen macht eine deutliche Verringerung des globalen Ausstoßes von Treibhausgasen unumgänglich. Der Bausektor und insbesondere die Zementherstellung sind von diesen Entwicklungen nicht ausgenommen, weshalb die Suche nach alternativen, nachhaltigen Baumaterialien verstärkt in den Fokus der Industrie und der Wissenschaft rückt. Im vorliegenden Artikel sollen einige Entwicklungstendenzen aufgezeigt und gewisse Potentiale und besondere Eigenschaften dieser Materialien hervorgehoben werden. Dabei erheben die Autoren mit diesem Aufsatz keinesfalls den Anspruch auf eine vollständige Darstellung aller bekannten Optionen, sondern er soll vielmehr zu neuen Denkansätzen motivieren und Forschungsbedarf aufzeigen.