This book summarises the results of 27 reseach projects carried out within a DM 15 million integrated research programme in Germany.The results show that the mechanical properties of earthen and cut.off materials can be improved and that testing methods a
This book summarises the results of 27 research projects carried out within a DM15 million integrated research programme in Germany. The results show that the mechanical properties of earthen and cut-off materials can be improved and that testing methods and apparatus are available for the determination of critical values. The research programme provides a deeper understanding of the performance of construction materials and the long-term behaviour of landfill liners and this will all help in the future design of safer landfills.
Contents
Introduction
List of projects
Research overview
Mechanical loading on earthen liners,damage due to subsidence
Water balance, the risk of desiccation in earthen liners
Contaminant transport, fundamentals and minimisation
Physical, chemical and biochemical influences on mineral liner materials
Construction techniques, quality management
Cut-offs walls
Safety and system amalysis
Geotextile protective layer system for geomembranes
Leachate drainage systems
Conclusinons and outlook
Project reports
Development of a safety concept for landfill liner systems
Influence of mechanical loading on the performance of mineral landfill liners
Investigation of limiting values of deformability for mineral landfill liners by simulation of deformations in 1:1 scale tests
Construction tchniques in the construcion of composite landfill liners
Development of proposals for liner structures - theoretical and experimental investigation
Redox-dependent mineralogical and chemical changes in clayey landfill basal liners and their soil mechanical effects
Maintenance of the functioning of landfill drainage systems
Self-healing behaviour with regard to permeability of mineral sealing materials in disturbed landfill liners/liner systems
Long-term behaviour of earthen layers in landfill basal liners, moisture balance under thermal effects
Thermal effects on the barrier efficiency of composite liners - test field measurements
Non-isothermal water and vapour movement below landfills: laboratory experiments on the computer simulations of desiccation in mineral liners
Experimental and numerical studies of contaminant transport through mineral liners and resulting improvements in liner materials
Investigation of the feasibility of mining techniques for the subsequent lining of existing landfills
Hydraulic control mechanisms for landfill liner systems
Geomembranes under punctiform loads
Investigation into the long-term integrity of protective materials for geomembranes in landfill basal liners
Practice-oriented investigation to improve geotextile protective layer system for geomembranes with regard to their long-term protective efficacy
Investigations into the influence of the drainage aperture in plastic drainage pipes to optimise their long-term stability under landfill conditions
Design of capillary barriers for capping of landfillls and contaminated sites
Effects of overburden pressure and degree of drainage on the soil-water characteristics of earthen liners
Stress-strain behaviour of high-density slurry materials for groundwater protection cut-off walls around landfills and contaminated land, development of practice oriented test methods and assessment criteria
Optimising processing techniques for mineral landfill liner construction
Permeability and stress-strain behaviour fo fibre-reinforced soils for landfill liner systems
Investigations into the frost susceptibility of mineral landfill liners, problems affecting stability and precautions to be taken
Influence of filter cake growth and solid matter shift on the quality, feasibility and cost of slurry trence cut-off walls
Innovative construction materials for waste containment barriers: biochemical durability and contaminant transport
Designing a method of total area leakage monitoring for landfill liners
Appendix