Sub-base
Reaproveitamento da areia de fundição como material de base e sub-base de pavimentos flexíveis
... de base e sub- base para rodovias de baixo volume de tráfego e vias urbanas para a região de Sertãozinho/SP, que é geradora de resíduo de areia de fundição, mas carece de jazidas de solos arenosos ...
10
Modelos de comportamento e valores reais de módulo resiliente de agregados britados não tratados utilizados em base e/ou sub-base de pavimentos rodoviários
... Os pavimentos rodoviários em Portugal continuam a ser construídos, quase exclusivamente, recorrendo a agregados naturais, de um modo geral britados. No entanto, o comportamento mecânico deste tipo de materiais, apesar de ...
11
Estudo da deformação permanente de britas granito-gnaisse para uso em base e sub-base de pavimentos
... A escolha do material para construção do pavimento tem muita importância porque influencia diretamente no seu desempenho. Neste trabalho, foram estudadas diferen- tes curvas granulométricas aplicadas para o mesmo ...
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Tese de Doutorado REFORÇO DE SOLOS UTILIZADOS EM BASE E SUB-BASE DE PAVIMENTOS RODOVIÁRIOS COM CINZA COM ALTO TEOR DE CÁLCIO
... Devido à grande quantidade de rejeitos gerados em distintas práticas das atividades humanas e suas rigorosas consequências com relação ao meio ambiente e a escassez de recursos naturais têm levado à busca por materiais ...
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Estudo da aplicação da cinza de caldeira a coque nas camadas de base e sub-base de pavimentos
... This study presents the characteriza#on of ash obtained of the beneficia#on process of nickel in steel plant having as main objec#ve, to evaluate its applicability for stabiliza#on of soils in base and ...
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Gerenciamento de resíduos da construção civil e demolição e sua utilização como base, sub-base e mistura betuminosa em pavimento urbano em Goiânia - GO
... Os Resíduos de Construção e Demolição-RCD representam cerca de 50% de todo o resíduo sólido gerado. A deficiência na gestão desses resíduos causa vários danos à sociedade, como: prejuízo à circulação de pessoas e ...
9
Estudo da aplicabilidade de misturas de açobrita com solos tropicais típicos de Minas Gerais em camadas de base e sub-base de pavimentos rodoviários
... Este baixo preço de aquisição da escória de aciaria frente ao praticado para a aquisição do agregado convencional, juntamente com vantagem econômica verificada na execução de camadas d[r] ...
141
Five years of CO, HCN, C<sub>2</sub>H<sub>6</sub>, C<sub>2</sub>H<sub>2</sub>, CH<sub>3</sub>OH, HCOOH and H<sub>2</sub>CO total columns measured in the Canadian high Arctic
... In contrast to these measurements, the ground-based FTIR technique can provide total columns, with good sensitiv- ity in the lower troposphere (compared to satellite measure- ments), as [r] ...
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Characterization of trace gases measured over Alberta oil sands mining operations: 76 speciated C<sub>2</sub>–C<sub>10</sub> volatile organic compounds (VOCs), CO<sub>2</sub>, CH<sub>4</sub>, CO, NO, NO<sub>2</sub>, NO<sub>y</sub>, O<sub>3</sub> and SO<su
... This 8% enhancement over the local background average was small compared to CH3Br mixing ratios of up to 15 pptv in fresh biomass burning plumes that were sampled during ARCTAS, suggesti[r] ...
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Chlorine activation by N<sub>2</sub>O<sub>5</sub>: simultaneous, in situ detection of ClNO<sub>2</sub> and N<sub>2</sub>O<sub>5</sub> by chemical ionization mass spectrometry
... We report a new method for the simultaneous in situ detection of nitryl chloride (ClNO2) and dinitrogen pen- toxide (N2O5 ) using chemical ionization mass spectrometry (CIMS).. The novel[r] ...
12
Tropospheric photooxidation of CF<sub>3</sub>CH<sub>2</sub>CHO and CF<sub>3</sub>(CH<sub>2</sub>)<sub>2</sub>CHO initiated by Cl atoms and OH radicals
... Furthermore, our kinetic study on the Cl and OH reactions with CF 3 (CH 2 ) 2 CHO constitutes the first rate coe ffi cients reported for this partially fluorinated aldehyde. 15[r] ...
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Investigation of the hygroscopic properties of Ca(NO<sub>3</sub>)<sub>2</sub> and internally mixed Ca(NO<sub>3</sub>)<sub>2</sub>/CaCO<sub>3</sub> particles by micro-Raman spectrometry
... no more systematic investigations of the hygroscopic behavior of Ca(NO 3 ) 2 -containing mineral dust particles, including both deliquescence and e ffl orescence transition and the RH de[r] ...
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Tropospheric photooxidation of CF<sub>3</sub>CH<sub>2</sub>CHO and CF<sub>3</sub>(CH<sub>2</sub>)<sub>2</sub>CHO initiated by Cl atoms and OH radicals
... On the other hand, at- mospheric photooxidation of these fluorinated alcohols, ini- tiated by hydroxyl (OH) radicals and chlorine (Cl) atoms, is known to yield fluorinated aldehydes as m[r] ...
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Chlorine activation by N<sub>2</sub>O<sub>5</sub>: simultaneous, in situ detection of ClNO<sub>2</sub> and N<sub>2</sub>O<sub>5</sub> by chemical ionization mass spectrometry
... We report a new method for the simultaneous in situ detection of nitryl chloride (ClNO 2 ) and dinitrogen pentoxide (N 2 O 5 ) using chemical ionization mass spectrometry (CIMS).. It doe[r] ...
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Technical note: A stratospheric climatology for O<sub>3</sub>, H<sub>2</sub>O, CH<sub>4</sub>, NO<sub>x</sub>, HCl and HF derived from HALOE measurements
... However, comparison with correlative data and an update of the retrieval (Thomason et al., 2004) indicated a significant low bias for this climatology. Previous, more abbreviated cli- ma[r] ...
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A two-channel, Thermal Dissociation Cavity-Ringdown Spectrometer for the detection of ambient NO<sub>2</sub>, RO<sub>2</sub>NO<sub>2</sub> and RONO<sub>2</sub>
... In summary, the correction procedure when sampling from the 453 and 723 K inlets is as follows: (1) We use the model simulation results in the form of look-up-tables with measured NO and[r] ...
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Spatiotemporal variations of air pollutants (O<sub>3</sub>, NO<sub>2</sub>, SO<sub>2</sub>, CO, PM<sub>10</sub>, and VOCs) with land-use types
... amine urban characteristics of the gridded land-use type data due to the non-uniform distribution of the pollution monitor- ing stations. The pollutants, except for VOCs, were investi- gated as time-averaged in the two ...
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Atmospheric homogeneous nucleation of H<sub>2</sub>SO<sub>4</sub> and H<sub>2</sub>O
... In our previous studies (Benson et al., 2008; Young et al., 2008), we reported the residual [H 2 SO 4 ] (measured at the end of the nucleation reactor) and further used the calculated wa[r] ...
23
Avaliação do potencial prebiótico de Akpan : produto fermentado à base de cereais e um sub-produto de cerveja de mandioca
... In this work, the prebiotic potential of both freeze-dried Akpan and BSC were evaluated directly by studying the effect on growth of single probiotic stain and by in vitro fermentation[r] ...
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Rate coefficients for the reaction of methylglyoxal (CH<sub>3</sub>COCHO) with OH and NO<sub>2</sub> and glyoxal (HCO)<sub>2</sub> with NO<sub>3</sub>
... The methylglyoxal concentration in the LIF reactor was determined using the measured gas flow rate in addition to on-line optical absorption measurements.. The UV absorption of methylgly[r] ...
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