Roads and Bridges - Drogi i Mosty
19, 2, 2020, 97-106

Bentonite-loess slurry for construction of diaphragm walls and bored piles

Marcin Dreger Mail
Road and Bridge Research Institute, 1 Instytutowa Str., 03-302 Warsaw
Mieczysław Przygoda Mail
Road and Bridge Research Institute, 1 Instytutowa Str., 03-302 Warsaw
Cezary Kraszewski Mail
Road and Bridge Research Institute, 1 Instytutowa Str., 03-302 Warsaw
Michał Mitrut Mail
Road and Bridge Research Institute, 1 Instytutowa Str., 03-302 Warsaw
Leszek Rafalski Mail
Road and Bridge Research Institute, 1 Instytutowa Str., 03-302 Warsaw
Mariusz Wojdal Mail
Road and Bridge Research Institute, 1 Instytutowa Str., 03-302 Warsaw
Published: 2020-06-30

Abstract

Bentonite fluids are used in narrow excavations in technologies of slurry walls and bored piles. If bentonite is characterised by high liquid limit, production of support fluid with sufficiently high density and accompanying low viscosity is impossible. The aim of the presented research was to verify the usefulness of loess for modification of bentonite slurries. Various bentonite-loess mixtures and suspensions activated with sodium carbonate were tested. It was noted that an addition of loess results in a decrease in liquid limit of the bentonite-loess mixture. Testing of suspensions produced from different bentonite-loess mixtures enabled determination of the optimum sodium carbonate content as well as the minimum bentonite-loess mixture content in the suspension ensuring the required density. The influence of loess content on viscosity and water bleed was then investigated, which enabled determination of loess content range at which suspensions with the required density fulfil also the requirements regarding viscosity and bleed. It was ascertained that an addition of loess enables production of bentonite-loess slurries with adequate properties. Based on the presented results, a patent was obtained and production of bentonite-loess mixture for use in technology of slurry walls was initiated.

Keywords


bentonite, liquid limit, loess, bored pile, diaphragm wall, bentonite-loess slurry, thixotropic fluid.

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References


Kledyński Z., Rafalski L.: Zawiesiny twardniejące. Studia z zakresu inżynierii nr 66. Polska Akademia Nauk. Komitet Inżynierii Lądowej i Wodnej. Instytut Podstawowych Problemów Techniki PAN, Warszawa 2009

Jefferis S.A., Lam C.: Polymer support fluids: use and misuse of innovative fluids in geotechnical works. Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013

Lam C., Jefferis S.A., Suckling T.P., Troughton V.M.: Effects of polymer and bentonite support fluids on the performance of bored piles. Soils and Foundations, 55, 6, 2015, 1487-1500

Czarnecki L., Broniewski T., Henning O.: Chemia w budownictwie. Arkady, Warszawa 1997

Czopowska-Lewandowicz M.: Próba identyfikacji bentonitu w betonie ściany szczelinowej. Materiałybudowlane, 8, 2016, 67-69

Lixue Y.: Laboratory measurement and prediction to the permeability of bentonite-modified less as a landfill liner. Rock and Soil Mechanics, 32, 7, 2011, 1963-1969

Boscov M.E.G., Soares V., Vasconcelos F.D., Ferrari A.A.P.: Geotechnical properties of a silt-bentonite mixture for liner construction. Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering, Volumes 1-4, 2009, 217- 220

Francis A., Mohandas T.V.: Compression characteristics of silt-bentonite mixtures in liners. Iconic Research and Engineering Journals, 1, 8, 2018, 75-79

Byung-Sik Ch., Jae-Woo P., Yong-Jae L., Byung-Hong K.: Geotechnical characterization of permeable barriers mixture of sand, loess and bentonite. 5th ICEG Environmental Geotechnics: Opportunities, Challenges and Responsibilities for Environmental Geotechnics, September 2018

WangY., Chen Y., Xie H., Zhang Ch., Zhan L.: Lead adsorption and transport in loess-amended soil-bentonite cut-off wall. Engineering Geology, 215, 2016, 69-80

Nowamooz H., Masrouri F.: Hydromechanical behaviour of an expansive bentonite/silt mixture in cyclic suction-controlled drying and wetting tests. Engineering Geology, 101, 3-4, 2008, 154-164

Wang S., Luna R., Yang J.: Effect of plasticity on shear behaviour of low-plasticity fine-grained soil. Journal of Materials in Civil Engineering, 29, 3, 2017, 04016228

Teerawattanasuk Ch., Voottipruex P.: Influence of clay and silt proportions on cement-treated fine-grained soil. Journal of Materials in Civil Engineering, 26, 3, 2014, 420-428

Patent PL 228163: Kompozycja do wytwarzania zawiesin tiksotropowych, przeznaczonych do zapewnienia stateczności podłoża podczas wykonywania konstrukcji podziemnych


Bentonite-loess slurry for construction of diaphragm walls and bored piles

  
Dreger, Marcin et al. Bentonite-loess slurry for construction of diaphragm walls and bored piles. Roads and Bridges - Drogi i Mosty, [S.l.], v. 19, n. 2, p. 97-106, jun. 2020. ISSN 2449-769X. Available at: <>. Date accessed: 29 Mar. 2024. doi:http://dx.doi.org/10.7409/rabdim.020.006.