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Mostrando ítems 1-10 de 2098
Estudo de concretos com pozolanas submetidos à carbonatação em ensaios acelerado e natural monitorado por 20 anos
(Universidade Federal de Santa MariaBrasilEngenharia CivilUFSMPrograma de Pós-Graduação em Engenharia CivilCentro de Tecnologia, 2019-09-02)
Carbonation, a potentially aggressive chemical reaction to concrete, is a slow process and difficult to detect in the short term through accelerated testing. In this work were studied concretes with fly ash (CV) and rice ...
Comparative carbon emission assessments of recycled and natural aggregate concrete: Environmental influence of cement content
(ElsevierNL, 2021)
This work examines the environmental and geochemical impact of recycled aggregate concrete production with properties representative for structural applications. The environmental influence of cement content, aggregate ...
Tuning the nitrogen content of carbon dots from N-rich up to oxidized carbon nitride nanoflakes
(Pergamon-Elsevier Science Ltd, 2020-10)
Carbon nanodots (CD) can be prepared from simple organic precursors and renewable natural products through user-friendly processes. Functional groups, structure, and morphology of CD determine their fundamental properties. ...
Carbon Stocks and Isotopic Composition of the Organic Matter in Soils Covered by Native Vegetation and Pasture in Sorocaba, SP, Brazil
(Univ Tehran, 2009-06-01)
Land cover change constitutes one of main way of alteration of soil organic matter in both quantitative and qualitative terms. The goal of this study was to compare the carbon stock and the isotopic signature of the organic ...
Carbon Stocks and Isotopic Composition of the Organic Matter in Soils Covered by Native Vegetation and Pasture in Sorocaba, SP, Brazil
(Univ Tehran, 2009-06-01)
Land cover change constitutes one of main way of alteration of soil organic matter in both quantitative and qualitative terms. The goal of this study was to compare the carbon stock and the isotopic signature of the organic ...
Carbon stocks and isotopic composition of the organic matter in soils covered by native vegetation and pasture in sorocaba, Sp, Brazil
(2009-12-01)
Land cover change constitutes one of main way of alteration of soil organic matter in both quantitative and qualitative terms. The goal of this study was to compare the carbon stock and the isotopic signature of the organic ...
Soil carbon storage controlled by interactions between geochemistry and climate
(Nature, 2015)
Soils are an important site of carbon storage(1). Climate is generally regarded as one of the primary controls over soil organic carbon(1,2), but there is still uncertainty about the direction and magnitude of carbon ...
Estudo da carbonatação natural de concretos com pozolanas: monitoramento em longo prazo e análise da microestrutura
(Universidade Federal de Santa MariaBREngenharia CivilUFSMPrograma de Pós-Graduação em Engenharia Civil, 2012-08-31)
The carbonation in concrete is caused by the penetration of environmental carbonic
anhydride (CO2) in concrete by diffusion, being considered one of more important
structures pathologies. It occurs naturally in concrete ...
Comparative carbon emission assessments of recycled and natural aggregate concrete: Environmental influence of cement content
(ElsevierCN, 2021)
This work examines the environmental and geochemical impact of recycled aggregate concrete production with properties representative for structural applications. The environmental influence of cement content, aggregate ...
Genetic variation in silvicultural traits and carbon stock content in a provenance-progeny test of Genipa americana L. (Rubiaceae)
(De Gruyter Poland Sp Zoo, 2018-02-01)
The aim of this study was to determine the genetic variation of growth traits, wood basic density, dry mass of crown, leaf, and stem, and carbon stock within and between two Genipa americana L. provenances. The provenance ...