Influence of fly ashes on hardening slurries resistance to sulphate attack

• Autorzy: Kledyński Z.
• Języki publikacji: EN

Abstrakty

EN

Rapid development of slurry wall technology in the underground constructions caused a noticeable increase in interest, cut-off walls well known in the past. Introduction of hardening slurry to this technology makes their construction easier and creates new possibilities for their application. Current challenge lies in subsoil insulation in order to avoid contamination spread into the ground waters. Thus, besides the already well known problems, new ones appeared, in that the issue of corrosion, especially of a chemical nature, to which the cut-off walls are exposed in the environment of aggressive groundwater. The paper focuses on the assessment of the hardening slurries to sulphate attack. The results of own investigations of cement-bentonite hardening slurry and cement-bentonite-ash hardening slurry prepared with the addition of aggressive liquid, as well as, with tap water and kept in a sulphate ion medium for 1 year are presented. Contamination spreading in non-filtration conditions was modelled. Tests of samples made with tap water and stored in tap water are considered as controls. The paper presents results of tests of liquid slurries properties and results of assessments of hardened slurries. Changes in mass of slurries, compressive and tensile strength and changes in sample storage environment chemistry were measured. Thermographic investigations of slurries were also conducted. The results of investigations and review of literature data on hardening slurries corrosion resistance to sulphate attack are presented. Practical suggestions in relation to the application of cut-off walls made of hardening slurries are made.

Słowa kluczowe

EN

groundwater protection; sulphate attack; cut-off walls; hardening \break slurries

• Wydawca: Institute of Hydro-Engineering of Polish Academy of Sciences
• Czasopismo: Archives of Hydro-Engineering and Environmental Mechanics
• Rocznik: 2004
• Tom: Vol. 51, nr 2
• Strony: 119--133
• Opis fizyczny: Bibliogr. 12, poz., tab., il.

Twórcy

autor

Kledyński Z.

• Warsaw University of Technology, Faculty of Environmental Engineering, Institute of Water Supply and Hydraulic Engineering, ul. Nowowiejska 20, 00--653 Warsaw, Poland,

Bibliografia

• Bastian S. (1980), Construction Concrete with Fly Ash, Arkady, Warsaw (in Polish).
• Grube W. E. (1992), Slurry Trench Cut-Off Walls for Environmental Pollution Control, [in:] Slurry Walls: Design, Construction, and Quality Control, Ed. Paul D. B., Davidson R. R., Cavalli N. J., ASTM, STP 1129, Philadelphia.
• Jawański W., Nowicki W., Młodawski W. (1996), Execution of Cut-Off Wall on the Chancza Dam Left Abutment, Proceedings of The VIIth Conference on Dams’ Technical Supervision, Rytro (in Polish).
• Khera R. P., Tirumala R. K. (1992), Materials for Slurry Walls in Waste Chemicals, [in:] Slurry Walls: Design, Construction, and Quality Control Ed. Paul D. B., Davidson R. R., Cavalli N. J., ASTM, STP 1129, Philadelphia.
• Kledyński Z. (2000), Corrosive Resistance of Hardening Slurries in Objects Supporting Environmental Protection, Scientific Research of Warsaw University of Technology, Environmental Engineering, vol. 33, Warsaw University of Technology Publishers, Warsaw, pp. 102, (in Polish).
• Kledyński Z., Kozyra M. (1997), Properties of Hardening Slurries State of Knowledge Review of Applications in Poland, [in:] Sanierung und Modernisierung von Wasserbauwerken, aktuelle Beispiele aus Deutschland, Polen, der Slowakei und Tschechien, Technische Universitat Dresden, Dresdner Wasserbauliche Mitteilungen, Heft 10, Dresden.
• Kłosinski B., Rafalski L. (1985), Application of Hardening Slurry to Execution of Cut-Off Wall in Dˆebe Dam Abutment, Quarterly of Hydrobudowa-Energopol Society: Hydraulic Structures and Power Pipelines, No. 4, (in Polish).
• Kurdowski W. (1991), Chemistry of Cement, PWN, Warsaw (in Polish).
• Lewandowski R. (1998), Reconstruction of the Dychow Dam Subsequent to the Slope Failure, International Symposium on New Trends and Guidelines on Dam Safety, Spanish NCOLD, Barcelona.
• Pisarczyk S. (1997), The Geotechnical Problems of Constructing Sealings for Modern Municipal Refuse Landfills, Scientific Research of Warsaw University of Technology, Environmental Engineering, Vol. 22, Warsaw University of Technology Publishers, Warsaw (in Polish).
• PN-EN 196-1 (1996), Methods of Testing Cement, Part 1: Determination of Strength, (in Polish).
• Rafalski L. (1995), Properties and Application of Hardening Slurries, Studies and Materials, Vol. 43, Road and Bridge Research Institute, Warsaw (in Polish).