Avaliação da eficiência de um gel hidroretentor como retardante de fogo

Souza, Henrique Neyffer de; Araújo, Tiago Guilherme de; Ribeiro, Guido Assunção

doi:10.1590/s0100-67622012000300009

Cited by 6 publications

(8 citation statements)

References 9 publications

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“…The post-application time of the water-retaining polymer on the combustible material, in general, did not impact the eff ectiveness of the retardant, however fi re extinction was observed after 1.0 h of application of the product. Similar behavior was observed by Souza et al (2012) applying water-retaining polymer spray of 2.0 L m -2 at a concentration of 0.0010% on Melinis minutifl ora P. Beauv., observing the conservation of moisture up to 24 h after application of the product on the fuel.…”

Section: Fire Behaviorsupporting

confidence: 77%

“…The interaction between the largest spray volumes and the most eff ective concentrations of the waterretaining polymer generated greater conservation of moisture in the combustible material. In this case, the applied product inhibited the evaporation of water from the fuel for a prolonged period in response to the slow release of water present in the water-retaining polymer molecules (BALENA, 1998;SOUZA et al, 2012;FIEDLER et al, 2015). By diff erentiating the polynomials, 0.0060% is defi ned as the ideal concentration of water-retaining polymer for application without waste in chemical fi rebreaks for indirect fi refi ghting within 2.0 h after its application on the combustible material of hybrid clones of Eucalyptus urophylla x Eucalyptus grandis cl.…”

Section: Fire Behaviormentioning

confidence: 99%

“…In the search for solutions to minimize the severity of forest fi res (in native or planted areas) and in crops (mainly in corn stover), alternative products have been studied as fi re retardants. The water-retaining polymers (hydrogels) used in the agroforestry sector to retain moisture in the soil have characteristics that indicate the potential to conserve moisture in combustible forest materials, thus being able to infl uence the variables of fi re behavior (BOURBIGOT and DUQUESNE, 2007;SOUZA et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Effectiveness of Water-Retaining Polymer as Fire Retardant in Indirect Use

et al. 2020

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The use of fire retardants increases efficiency in fighting forest fires, however, it still presents uncertainties regarding environmental contamination, recommendations for preparation, and it lack of regulation in Brazil. In this scenario, alternative products such as water-retaining polymers, that can reduce the rapid evaporation of water, can also have positive effects in terms of reducing fire behavior. Efficiency and ways of using the water-retaining polymer as a short-duration fire retardant (indirect combat) in controlled burns in eucalyptus plantations were evaluated. Five concentrations (dilution in water), three volumes of spray solution, and two post-application times on the combustible material available in the area were evaluated. Controlled burns were conducted downwind, between 10 am and 2 pm, during dry season in the region, with micrometeorological and fire behavior assessments (fire propagation speed and length of flames). Increased spray volume and concentration of water-retaining polymer led to reductions in the spread of fire. In eucalyptus combustible material, the water-retaining polymer can be used as a fire retardant of short duration (effective up to two hours after application), considering a spray volume of 2.0 L m-2 and concentration of 0.0060% (diluted in water).

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Section: Fire Behaviorsupporting

confidence: 77%

Section: Fire Behaviormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effectiveness of Water-Retaining Polymer as Fire Retardant in Indirect Use

et al. 2020

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“…De acordo com Souza et al (2012), em áreas de risco e de importância, seja ela de natureza econômica, ambiental ou social, em épocas críticas, é de extrema necessidade realizar medidas para diminuir as ocorrências. Destaca-se a possibilidade do uso de um mecanismo capaz de retardar a queima dos materiais combustíveis.…”

Section: Introductionunclassified

Diferentes Concentrações de Retardante de Fogo em Plantios de Eucalipto

Canzian¹,

Fiedler²,

Brinate³

et al. 2016

NATIVA

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RESUMO:Incêndio florestal é um dos maiores causadores de prejuízos no triângulo da sustentabilidade no meio florestal, ou seja, ele proporciona prejuízos econômicos, ambientais e sociais. Esta pesquisa teve o objetivo de avaliar o efeito de diferentes concentrações de retardante de fogo sob a intensidade de queima e altura de chamas em plantio de eucalipto. O experimento foi conduzido com 3 distintas concentrações de retardante de fogo (1,5, 2,0 e 3,0%) além de testemunha com água. A dosagem de calda da mistura do retardante com água utilizada nesta pesquisa foi de 0,5 L m -2 de área. Durante a queima de cada unidade amostral foram avaliadas as seguintes variáveis: umidade relativa, velocidade do vento, tempo gasto para o fogo queimar a parcela com e sem o produto, altura das chamas e a distância que o fogo avançou na parcela. Para a análise foi calculado a intensidade de queima da unidade amostral por concentração do produto. O efeito das concentrações do retardante foi evidenciado, visto que apresentou diferenças significativas pelo teste Tukey em nível de 95% de probabilidade, diferenciando-se da testemunha (água). A concentração mais eficiente foi a de 3,0% com menores taxas de intensidade de queima e altura de chamas.Palavras-chave: incêndios florestais, proteção florestal, intensidade de queima. Diferent concentrations of fire retardant in eucalyptus plantationsABSTRACT: This research aimed to evaluate the effect of different concentrations of fire retardant under the intensity and height of flames burning in Eucalyptus plantations. The experiment was conducted in a rural property in the south of the Espírito Santo, Brazil, conducted with three concentrations (1.5, 2.0 and 3.0%) in addition to treatment with water. The dosage of tail mixture of the with water retardant used in this study was 0.5 L m-2 of area. During the firing of each plot (treatment/repeat) the following variables were evaluated: relative wind speed, humidity time spent by the fire burn the plot with and without the product, height of the flames and the distance advanced by the fire in the plot. For analysis of the intensity of the burning portion was calculated by concentration of product. The effect of concentrations of retardant was evident, since they showed significant difference by Tukey test at 5% probability, differentiating itself from the control (water). The most effective concentration was 3.0% for both situations, intensity and height of flames burning, with the lowest rates of lower flammability and flame heights.

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“…A comparação estatística das médias seguiu a mesma metodologia utilizada por Souza et al (2012). Para a mensuração da alteração de cor nas amostras, combinando as variáveis L*, a* e b*, antes e depois das exposições (∆E), foi utilizada a seguinte fórmula (equação 1):…”

Section: Methodsunclassified

Comportamento da cor de lâminas de madeira de Pau-marfim (Balfourodendron riedelianum) tratada com produtos de acabamento

et al. 2013

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6RESUMO -Este trabalho testou produtos no combate ao envelhecimento da madeira. Através de uma câmara de envelhecimento e aparelho de espectrocolorimetria, caracterizou-se a influência de produtos químicos de acabamentos aplicados à madeira durante processo artificial de fotodegradação. Acompanhou-se o envelhecimento do Pau-marfim (Balfourodendron riedelianum) por 8.807 medições colorimétricas, após receber ciclos de radiação ultravioleta durante períodos: 20, 40, 60, 80, 120, 180, 250, 310, 410 e 500 horas. O sistema CIE La*b* de 1976 mostrou as modificações das cores. O uso da seladora provocou uma maior variação dos parâmetros colorimétricos da madeira quando comparado aos demais tratamentos.Palavras-chave: Envelhecimento, Radiação, Colorimetria. : 20, 40, 60, 80, 120, 180, 250, 310, 410 and COLOR BEHAVIOR OF PAU-MARFIM (Balfourodendron riedelianum) WOOD LAMINATES TREATED WITH FINISHING PRODUCTS. ABSTRACT -This study tested products to combat aging of wood. Through an aging chamber and a spectrocolorimetry device, the influence of chemical finishing products applied to wood were characterized during artificial photodegradation process. The aging of Balfourodendron riedelianum was monitored through 8.807 colorimetry measurements, with the samples undergoing cycles of ultraviolet radiation for periods of

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Avaliação da eficiência de um gel hidroretentor como retardante de fogo

Cited by 6 publications

References 9 publications

Effectiveness of Water-Retaining Polymer as Fire Retardant in Indirect Use

Effectiveness of Water-Retaining Polymer as Fire Retardant in Indirect Use

Diferentes Concentrações de Retardante de Fogo em Plantios de Eucalipto

Comportamento da cor de lâminas de madeira de Pau-marfim (Balfourodendron riedelianum) tratada com produtos de acabamento

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