Typescript. / Digitized by Kansas Correctional Industries

This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.

No description available.

Thesis (Ph. D.)--University of New South Wales, 2001. / Also available online.

Modern building procedures and requirements demand that the selection and stabilisation of soils for the purposes of rammed earth construction be better quantified. This study examines the relationships between soil properties, stabiliser treatments, and stabilised strength and density for 111 soil samples taken from sites in New South Wales (Australia), and develops new quantitative criteria for soil assessment, selection, and stabilisation. Laboratory measurements of soil particle size distribution, plasticity, and shrinkage were made for each soil. Various quantities from 0-6 % of lime, cement, and asphalt were added to the soil samples, and the resulting 230 specimens were compacted, and cured for 28 days. Determinations were made of the optimum moisture content, maximum dry density, and compressive strength of the stabilised material. The samples showed stabilised strengths ranging from 1.0-5.4 MPa, with a mean of 2.62 MPa, and densities from 1.44-2.21 t/m3, with a mean of 1.86 t/m3. The results show that over 90 % of the variation in stabilised strength and density of the samples is due to variation in soil properties, with differences in stabiliser type or stabiliser quantity being relatively minor. The most important soil properties explaining stabilised strength are linear shrinkage and plasticity index. These properties have been used to categorise the soils into three groups on the basis of their suitability for stabilisation as measured against a compressive strength criterion of 2 MPa. Favourable soils have shrinkages of &lt 7.1 % and plasticities of &lt 16 %, and 90 % of these samples passed the 2 MPa criterion. Satisfactory soils have shrinkages of 7.1-13.0 % and plasticities of 16-30 %, and 65 % of these samples had strengths in excess of 2 MPa. Unfavourable soils have shrinkages of &gt 13 % and plasticities of &gt 30 %, and only 10 % of these samples exceeded the 2 MPa value. Soils in the favourable and satisfactory categories can be further discriminated using textural information. On that basis, all soils classified as favourable, and those classified as satisfactory and which also have sand contents &lt 60 %, are recommended as being suitable for stabilisation. Soils not fulfilling these criteria are unlikely to be successfully stabilised and should be rejected. These results stress the importance of selecting a soil favourably predisposed to stabilisation. Field techniques to search for such soils could be refined on the basis of the new soil criteria presented. Use of the criteria should also minimise unnecessary laboratory testing of the density and strength of soils that subsequently prove unsuitable for stabilisation. A flow chart is presented to guide practitioners through the different stages of soil testing, assessment, and rammed earth stabilisation.

Made available in DSpace on 2014-11-10T11:09:48Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-08-19Bitstream added on 2014-11-10T11:58:02Z : No. of bitstreams: 1 000793090.pdf: 3684115 bytes, checksum: c338c104388466a14b8167ba7484e538 (MD5) / Diante da preocupação atual com construções ecologicamente corretas, o adobe surge como importante opção em edificações de baixo custo, por economizar em transporte, quando a terra adequada encontra-se disponível no próprio local da obra; não requerer mão-de-obra especializada; possuir excelente conforto térmico; e não consumir energia para sua fabricação. Trata-se de um material de construção milenar, muito utilizado em diversas partes do mundo. As matérias-primas necessárias para a sua produção (terra e água) são facilmente encontradas na natureza. Apresenta baixo custo energético, pois seu processo de fabricação é simples e não requer cozimento, configurando-se numa tecnologia apropriada plenamente inserida nos preceitos da construção sustentável. Avaliou-se, neste trabalho, a confecção de adobes com adição de cimento e resíduos de construção. Foram realizados ensaios de caracterização dos materiais, compreendendo análise granulométrica, determinação de massa específica no estado solto e limites de consistência. No caso dos adobes, com dimensões de 7,5 cm x 15 cm x 30 cm, realizaram-se ensaios de massa específica, retração linear, umidade higroscópica, absorção e resistência mecânica à compressão. Visando melhorar a sua homogeneização, procedeu-se à mistura dos componentes em betoneira, tendo como resultado um material de consistência plástica. A cura foi feita em câmara úmida aos 7, 28 e 56 dias. Concluiu-se que a adição de resíduo de concreto contribuiu no sentido de promover uma tendência de aumento da resistência, redução da absorção e da retração linear. A adição de cimento promoveu aumento de resistência em função do tempo e redução da absorção. / In view of current preoccupation with ecologic buildings right, the adobe comes as an important choice in low cost edifications, because it saves on transportation when the appropriate land is found in the same place that the work; doesn´t require skilled labor; has excellent thermal comfort; and doesn’t consume energy to production. It´s a millennial construction material, very used in many parts of the world. The raw material necessary to production of adobe is land and water, found easily in the nature. Besides that, it has low energy cost, the manufacture process is simple and doesn´t need baking, being considered an appropriate technology with sustainability concept. In this research, it evaluated the production of adobes with addition of cement and construction waste. Material characterization tests were performed, including particle size analysis, determination of density in loose condition and consistency limits. The tests with the adobe, with dimensions of 7,5 cm x 15 cm x 30 cm, were out specific mass, linear shrinkage, hygroscopic moisture, absorption and mechanical resistance to compression. To improve the homogenization proceeded to the mixture of components in a concrete mixer, resulting in a material of plastic consistency. Curing was done in a humid at 7, 28 and 56 days chamber. It was concluded that the addition of concrete residue contributed to promote a trend of increased resistance, reduced absorption and linear shrinkage. The addition of cement promoted an increase in resistance as a function of time and decreased absorption.

Orientador: Antonio Anderson da Silva Segantini / Banca: Marco Antonio Morais Alcantara / Banca: Paulo José Rocha de Albuquerque / Resumo: Diante da preocupação atual com construções ecologicamente corretas, o adobe surge como importante opção em edificações de baixo custo, por economizar em transporte, quando a terra adequada encontra-se disponível no próprio local da obra; não requerer mão-de-obra especializada; possuir excelente conforto térmico; e não consumir energia para sua fabricação. Trata-se de um material de construção milenar, muito utilizado em diversas partes do mundo. As matérias-primas necessárias para a sua produção (terra e água) são facilmente encontradas na natureza. Apresenta baixo custo energético, pois seu processo de fabricação é simples e não requer cozimento, configurando-se numa tecnologia apropriada plenamente inserida nos preceitos da construção sustentável. Avaliou-se, neste trabalho, a confecção de adobes com adição de cimento e resíduos de construção. Foram realizados ensaios de caracterização dos materiais, compreendendo análise granulométrica, determinação de massa específica no estado solto e limites de consistência. No caso dos adobes, com dimensões de 7,5 cm x 15 cm x 30 cm, realizaram-se ensaios de massa específica, retração linear, umidade higroscópica, absorção e resistência mecânica à compressão. Visando melhorar a sua homogeneização, procedeu-se à mistura dos componentes em betoneira, tendo como resultado um material de consistência plástica. A cura foi feita em câmara úmida aos 7, 28 e 56 dias. Concluiu-se que a adição de resíduo de concreto contribuiu no sentido de promover uma tendência de aumento da resistência, redução da absorção e da retração linear. A adição de cimento promoveu aumento de resistência em função do tempo e redução da absorção. / Abstract: In view of current preoccupation with ecologic buildings right, the adobe comes as an important choice in low cost edifications, because it saves on transportation when the appropriate land is found in the same place that the work; doesn't require skilled labor; has excellent thermal comfort; and doesn't consume energy to production. It's a millennial construction material, very used in many parts of the world. The raw material necessary to production of adobe is land and water, found easily in the nature. Besides that, it has low energy cost, the manufacture process is simple and doesn't need baking, being considered an appropriate technology with sustainability concept. In this research, it evaluated the production of adobes with addition of cement and construction waste. Material characterization tests were performed, including particle size analysis, determination of density in loose condition and consistency limits. The tests with the adobe, with dimensions of 7,5 cm x 15 cm x 30 cm, were out specific mass, linear shrinkage, hygroscopic moisture, absorption and mechanical resistance to compression. To improve the homogenization proceeded to the mixture of components in a concrete mixer, resulting in a material of plastic consistency. Curing was done in a humid at 7, 28 and 56 days chamber. It was concluded that the addition of concrete residue contributed to promote a trend of increased resistance, reduced absorption and linear shrinkage. The addition of cement promoted an increase in resistance as a function of time and decreased absorption. / Mestre

Typescript (photocopy). / Digitized by Kansas Correctional Industries / Department: Regional and Community Planning.

Thesis (Doctoral)--Oslo School of Architecture and Design, 2007. / "Adobe, wattle-and-daub, and compressed earth blocks (CSB) ... brick"--P. 4 of cover. Includes bibliographical references (p. 229-238).