1982
DOI: 10.1111/j.1365-2389.1982.tb01802.x
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A comparative study of three methods of water removal prior to resin impregnation of two soils

Abstract: The water in replicate samples from sub-surface horizons of a clayey and a fine-silty soil was removed either by oven-drying, freeze-drying or by acetone-replacement prior to resin impregnation. Pore space photograms (pores >60 pm diam.) from thin sections were analysed on a Quantimet 720 image analysing computer following each drying technique. During oven-and freeze-drying the clayey soil contracted considerably and subsequently satisfactory impregnation of these samples was either difficult or impossible. T… Show more

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Cited by 23 publications
(19 citation statements)
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“…This was done before and after the passage of the rotary cultivator, and after the passage of the sowing machine. The samples were dried at 40 °C and, according to Murphy (1982), for a low content of clay and organic matter, this low temperature ensures the departure of water without altering soil structure. When dried, the samples were impregnated in a vacuum with the aim that the resin fill the smallest pores possible.…”
Section: Characterization Of Soil Structure Created By a Rotary Cultimentioning
confidence: 99%
“…This was done before and after the passage of the rotary cultivator, and after the passage of the sowing machine. The samples were dried at 40 °C and, according to Murphy (1982), for a low content of clay and organic matter, this low temperature ensures the departure of water without altering soil structure. When dried, the samples were impregnated in a vacuum with the aim that the resin fill the smallest pores possible.…”
Section: Characterization Of Soil Structure Created By a Rotary Cultimentioning
confidence: 99%
“…The resin mixture produced for New Zealand conditions had a low viscosity to ensure infiltration into the smallest pores, as well as being able to set when there was some moisture present. To ensure curing of the resin mixture, cores were collected when soil moisture was below and near field capacity and left in a well-ventilated room for 24 h before resin application, allowing for some moisture loss while preventing shrinkage and cracking (Murphy 1982). The method of resin impregnation is more expensive and labour intensive than some traditional methods of measuring soil structure, but offers the advantage of more detailed assessment of soil pore size and shape.…”
Section: Resultsmentioning
confidence: 99%
“…Existe uma extensa bibliografia disponível sobre secagem e impregnação de amostras de solos para estudos micromorfológicos (Brewer 1964;Conway 1982;Murphy 1982Murphy , 1985Murphy , 1986Castro 1985;Chartres et al 1989;Moran et al 1989;de Paula et al 1991;Carter 1993;Fitzpatrick 1993;Filizola;Gomes 2004), que pode guiar nos procedimentos mais adequados de acordo à natureza das amostras. Não obstante, sempre é recomendável coletar blocos inalterados (1)0 termo "fábrica'' é definido por Bullock et aí.…”
Section: Preparação Das Amostras No Laboratóriounclassified
“…Na maioria dos laboratórios a secagem das amostras se realiza ao ar durante aproximadamente 48 horas, ou até que o peso se tome constante, e na estufa a temperatura baixa (40Q C no máximo) até a amostra secar completamente. Este procedimento de secagem é altamente eficiente em areias ou siltes que não sofrem encolhimento na estufa, mas para materiais muito orgânicos ou ricos em argilas expansivas, que na estufa sofreriam severas diminuições no seu volume2 com produção de gretas artefatuais, é recomendado o uso de acetona, especialmente na sua forma liquida, para substituir a água nos poros prévia à impregnação das amostras (para maior informação sobre secagem por substituição com acetona ver Murphy 1982Murphy , 1985Murphy , 1986Conway 1982;Chartres et al 1989;Moran et al 1989;Carter 1993).…”
Section: V1llagrán X S Micromorfologia De Depósitos Arqueológicosunclassified