What was developed or tested
Mix-ratio trials included compressive strength, water absorption and assessment of gold and mercury. Reported strengths met the cited non-loadbearing criteria.
What the evidence supports
This case provides evidence for a local masonry route under the reported test conditions. Durability, production quality assurance and mercury behaviour over the product lifecycle need further work.
Environmental and technical uncertainty
Mercury-bearing residues demand conservative sampling, exposure assessment and end-of-life controls; binder encapsulation is not a substitute for release testing.
Benefit-case screening lens
Potential value: Potential co-product revenue, reduced demand for virgin aggregate or binder inputs, local supply and avoided tailings storage.
Deployment constraints: Product specification, consistency, processing and binder demand, customer qualification, market volume, haulage distance and residual liability.
Question before applying elsewhere
Does the site-specific residue meet durability, leaching, production-control and applicable material-specification requirements at the proposed scale?