Plastic Concrete for Cut-Off Walls: a review on material behaviourÂ-Video

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Video Summary

David-Arlos Shepherd of Karlsruhe Institute of Technology presents a literature review on plastic concrete for cut-off walls. Its mix design combines sand and gravel with high water–cement ratios and bentonite, producing relatively low strength. The reviewed studies show that compressive strength generally falls as the water–cement ratio rises, while elastic modulus increases with compressive strength, though results vary across testing standards. Hydraulic conductivity tends to decrease as strength increases. However, available research does not establish a measurable relationship between permeability and bentonite content, or clarify how conductivity changes over time. Shepherd highlights these gaps for future research.

Keywords

plastic concrete

cut-off walls

water-cement ratio

bentonite

hydraulic conductivity