Secções delgadas de solos: método de impregnação

Mendes, A. C. Teixeira; Falci, S. C.; Demattê, J. L. I.

doi:10.1590/S0071-12761973000100003

Resumos

O presente trabalho apresenta um método desenvolvido para a impregnação de amostras de solo indeformadas, com a posterior finalidade da confecção de secções delgadas. A impregnação é efetuada sob vácuo e em um dessecador adaptado para receber a mistura impregnante. Esta, é constituída pela resina poliéster Polylite T 213 diluída em monômero de estireno e catalisada com peróxido de metil-etil-cetona. A confecção das secções delgadas não apresentou problemas que pudessem ser atribuídos a falhas na impregnação, tais como desintegração da amostra, dissolução da mesma em água, trincas, etc. Lâminas de solos e argilas foram obtidas com resultados amplamente satisfatórios.

A method is described for impregnation undisturbed soil and clay materials with a clear and transparent plastic which polimerizes and hardens at room temperature. The impregnation is carried out under vacuum in a desiccator adapted to receive the impregnating solution (poliester resin Polylite T 213 and monomeric styrene, with methyl-ethyl-ketone peroxide as catalist). Thin sections of soil and clay materials were obtained with satisfactory results. The effectiveness of the impregnation was ascertained by the absence of sample desintegration, dissolution in water and cracking.

Secções delgadas de solos: método de impregnação^* * Trabalho apresentado em 1971 no XIII Congresso Brasileiro de Ciência do Solo realizado em Guarapari, Vitória, E. S.

Soil thin section: impregnating method

A. C. Teixeira Mendes^I; S. C. Falci^II; J. L. I. Demattê^I

^IProfessor de Disciplina e Livre Docente, respectivamente, do Departamento de Solos e Geologia da E.S.A. "Luiz de Queiroz", Universidade de São Paulo

^IIPós-Graduada da E. S. A. "Luiz de Queiroz" e bolsista da Fundação de Amparo à Pesquisa do Estado de São Paulo, à qual agradece pela Bolsa de Aperfeiçoamento

RESUMO

O presente trabalho apresenta um método desenvolvido para a impregnação de amostras de solo indeformadas, com a posterior finalidade da confecção de secções delgadas.

A impregnação é efetuada sob vácuo e em um dessecador adaptado para receber a mistura impregnante. Esta, é constituída pela resina poliéster Polylite T 213 diluída em monômero de estireno e catalisada com peróxido de metil-etil-cetona.

A confecção das secções delgadas não apresentou problemas que pudessem ser atribuídos a falhas na impregnação, tais como desintegração da amostra, dissolução da mesma em água, trincas, etc.

Lâminas de solos e argilas foram obtidas com resultados amplamente satisfatórios.

SUMMARY

A method is described for impregnation undisturbed soil and clay materials with a clear and transparent plastic which polimerizes and hardens at room temperature.

The impregnation is carried out under vacuum in a desiccator adapted to receive the impregnating solution (poliester resin Polylite T 213 and monomeric styrene, with methyl-ethyl-ketone peroxide as catalist).

Thin sections of soil and clay materials were obtained with satisfactory results. The effectiveness of the impregnation was ascertained by the absence of sample desintegration, dissolution in water and cracking.

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LITERATURA CITADA

Entregue para publicação em 25/7/1973.

BARTELLI, L. J. & ODELL, E. T. Laboratory studies and genesis of a clay-enriched horizon in the lowest part of the solum of some Brunizem and Graw-Brown Podozilic soils in Illinois. Soil Scinece Society of America Proceedings 24(5): 390-395. 1960.
BENNEMA, J.; JONGERIUS, A. & LEMOS R. C. Micromorphology of some oxic and argillic horizons in south Brazil in relation to weathering sequences. Geoderma 4: 333-335. 1970.
BOURBEAU, G. A. & BERGER, K. C. Thin sections of soils and friable materials prepared by impregnation with the plastic "Castolite". Soil Science Society of America Proceedings 12: 409-412. 1947.
BREWER, R. Fabric and Mineral Analysis of Soils. John Wiley and Sons, Inc., New York, xiii 470 pp. 1964.
BOUL, S. W. Clay skin genesis in Wisconsin soils. A thesis submitted to the Graduate School of the University of Wisconsin in partial fulfillment of the requeriments for the degree of Doctor of Philosophy, xiii 109 pp. 1960.
BUOL, S. W. & FADNESS, D. M. New method of impregnating fragile material for thin sectioning. Soil Science Society of America Proceedings 25 (3): 253. 1961.
BUOL, S. W. & HOLE, F. D. Some characteristics of clay skins on peds in the B horizons of a Graw-Brown Podzolic Soil. Soil Science Society of America Proceedings 23 (3): 239-241. 1959.
BUOL, S. W. & HOLE, F. D. Clay skin genesis in Wisconsin soils. Soil Science Society of America Proceedings 25(5): 377-379. 1961.
BUOL, S. W. & YESILOY, M. S. A genesis of a Mohave candy loam profile. Soil Science Society of America Proceedings 28(2): 254-256. 1964.
CAMPOS, D. A. F. Micropedologia, Contribuição ao estudo de solos de Piracicaba. Tese apresentada à Escola Superior de Agricultura "Luiz de Queiroz" da Universidade de São Paulo para obtenção do título de Doutor, IV 77 pp. 1968.
DALRYMPLE, L. B. Preparation of thin sections of soils. The Journal of Soil Science 8(1): 161-165. 1957.
DOBELL, J. P. & DAY, D. P. Preparation of thin sections of unconsolidated or friable sediments. Journal of Sedimentary Petrology 36(1): 254. 1966.
FREI, E. & CLINE, M. G. Profile studies of normal soils of New York: II Micromorphological studies of the Graw-Brown Podzolic Brown Podzolic soil sequences. Soil Science 68 (4): 333-344. 1949.
GILE, L. H. A simplified method for preparation of soil thin sections. Soil Science Society of America Proceedings 31(4): 570-571. 1967.
GILE, L. H. & GROSSMAN, R. B. Morphology of the argillic horizon in desert soils of southern New Mexico. Soil Science 106(1): 1-15. 1968.
KUBIENA, W. L. Micropedology. Collegiate Press, Ames, Iowa, XVI 243 pp. 1938.
LANGTON, J. E. & LEE, G.B. Preparation of thin sections prom moist organic soil materials. Soil Science Society of America Proceedings 29 (2): 221-223. 1965.
MILLER, F. P. Physical, chemical, and mineralogical properties related to the micromorphology of the Canfield silt loam A Fragiudalf. A thesis submitted to Graduate School of the Ohio State University in partial fulfillment of the requeriments for the degree of Doctor of Phylosophy. x 218 pp. 1965.
NETTLETON, W. D.; FLACH, K. W. & BRASHER, B. R. Argillic horizons without clay slkins. Soil Science Society of America Proceedings 33(1): 121-125. 1969.
OSMOND, D. A. Thin sections of soils. Science Progress 43 (172) : 693-696. 1955.
OSMOND, D. A. & STEPHEN, I. The micropedology of some red soils: from Cyprus. The Journal of Sou Science 8(1): 19-26. 1957.
PETTAPIECE, W. W. & ZWARICH, M. A. Micropedological study of a Chernozemic to Grey Wooded sequence of soils in Manitoba. The Journal of Soil Science 21(1): 138-145, 1970.
ROSS, C. S. The preparation of thin section of friable rocks. American Journal of Science 7(42): 483-485. 1924.
SINGH, R. B. A versatile method for treatment of clay soils for thin-section fabbric studies. The Journal of Soil Science 20(2): 269-273. 1969.
SOIL SURVEY STAFF — Soil Classification, A Comprehensive System — Seventh Approximation. Soil Conservation Service, United States Departement of Agriculture. 265 pp. 1960.
SOIL SURVEY STAFF — Supplement to Soil Classification System — Seventh Approximation. Second Printing. Soil Conservation Service, United States Departement of Agriculture. 207 pp. 1967.
STEPHEN, I. Clay orientation in soils. Science Progress 48 : 322-331. 1960.

*

Trabalho apresentado em 1971 no XIII Congresso Brasileiro de Ciência do Solo realizado em Guarapari, Vitória, E. S.

Datas de Publicação

Publicação nesta coleção
29 Maio 2012
Data do Fascículo
1973

Histórico

Recebido
25 Jul 1973

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

[1] BARTELLI, L. J. & ODELL, E. T. Laboratory studies and genesis of a clay-enriched horizon in the lowest part of the solum of some Brunizem and Graw-Brown Podozilic soils in Illinois. Soil Scinece Society of America Proceedings 24(5): 390-395. 1960.

[2] BENNEMA, J.; JONGERIUS, A. & LEMOS R. C. Micromorphology of some oxic and argillic horizons in south Brazil in relation to weathering sequences. Geoderma 4: 333-335. 1970.

[3] BOURBEAU, G. A. & BERGER, K. C. Thin sections of soils and friable materials prepared by impregnation with the plastic "Castolite". Soil Science Society of America Proceedings 12: 409-412. 1947.

[4] BREWER, R. Fabric and Mineral Analysis of Soils. John Wiley and Sons, Inc., New York, xiii 470 pp. 1964.

[5] BOUL, S. W. Clay skin genesis in Wisconsin soils. A thesis submitted to the Graduate School of the University of Wisconsin in partial fulfillment of the requeriments for the degree of Doctor of Philosophy, xiii 109 pp. 1960.

[6] BUOL, S. W. & FADNESS, D. M. New method of impregnating fragile material for thin sectioning. Soil Science Society of America Proceedings 25 (3): 253. 1961.

[7] BUOL, S. W. & HOLE, F. D. Some characteristics of clay skins on peds in the B horizons of a Graw-Brown Podzolic Soil. Soil Science Society of America Proceedings 23 (3): 239-241. 1959.

[8] BUOL, S. W. & HOLE, F. D. Clay skin genesis in Wisconsin soils. Soil Science Society of America Proceedings 25(5): 377-379. 1961.

[9] BUOL, S. W. & YESILOY, M. S. A genesis of a Mohave candy loam profile. Soil Science Society of America Proceedings 28(2): 254-256. 1964.

[10] CAMPOS, D. A. F. Micropedologia, Contribuição ao estudo de solos de Piracicaba. Tese apresentada à Escola Superior de Agricultura "Luiz de Queiroz" da Universidade de São Paulo para obtenção do título de Doutor, IV 77 pp. 1968.

[11] DALRYMPLE, L. B. Preparation of thin sections of soils. The Journal of Soil Science 8(1): 161-165. 1957.

[12] DOBELL, J. P. & DAY, D. P. Preparation of thin sections of unconsolidated or friable sediments. Journal of Sedimentary Petrology 36(1): 254. 1966.

[13] FREI, E. & CLINE, M. G. Profile studies of normal soils of New York: II Micromorphological studies of the Graw-Brown Podzolic Brown Podzolic soil sequences. Soil Science 68 (4): 333-344. 1949.

[14] GILE, L. H. A simplified method for preparation of soil thin sections. Soil Science Society of America Proceedings 31(4): 570-571. 1967.

[15] GILE, L. H. & GROSSMAN, R. B. Morphology of the argillic horizon in desert soils of southern New Mexico. Soil Science 106(1): 1-15. 1968.

[16] KUBIENA, W. L. Micropedology. Collegiate Press, Ames, Iowa, XVI 243 pp. 1938.

[17] LANGTON, J. E. & LEE, G.B. Preparation of thin sections prom moist organic soil materials. Soil Science Society of America Proceedings 29 (2): 221-223. 1965.

[18] MILLER, F. P. Physical, chemical, and mineralogical properties related to the micromorphology of the Canfield silt loam A Fragiudalf. A thesis submitted to Graduate School of the Ohio State University in partial fulfillment of the requeriments for the degree of Doctor of Phylosophy. x 218 pp. 1965.

[19] NETTLETON, W. D.; FLACH, K. W. & BRASHER, B. R. Argillic horizons without clay slkins. Soil Science Society of America Proceedings 33(1): 121-125. 1969.

[20] OSMOND, D. A. Thin sections of soils. Science Progress 43 (172) : 693-696. 1955.

[21] OSMOND, D. A. & STEPHEN, I. The micropedology of some red soils: from Cyprus. The Journal of Sou Science 8(1): 19-26. 1957.

[22] PETTAPIECE, W. W. & ZWARICH, M. A. Micropedological study of a Chernozemic to Grey Wooded sequence of soils in Manitoba. The Journal of Soil Science 21(1): 138-145, 1970.

[23] ROSS, C. S. The preparation of thin section of friable rocks. American Journal of Science 7(42): 483-485. 1924.

[24] SINGH, R. B. A versatile method for treatment of clay soils for thin-section fabbric studies. The Journal of Soil Science 20(2): 269-273. 1969.

[25] SOIL SURVEY STAFF — Soil Classification, A Comprehensive System — Seventh Approximation. Soil Conservation Service, United States Departement of Agriculture. 265 pp. 1960.

[26] SOIL SURVEY STAFF — Supplement to Soil Classification System — Seventh Approximation. Second Printing. Soil Conservation Service, United States Departement of Agriculture. 207 pp. 1967.

[27] STEPHEN, I. Clay orientation in soils. Science Progress 48 : 322-331. 1960.