Ledger · 2026-08-29 · Civil Engineering / Infrastructure Materials
Biogenic Acid-Resistant Sewer Infrastructure via Alkali-Activated Aluminosilicate Geopolymers
Cleared
This concept cleared all seven gates and every voiding sub-test.
| Incumbent displaced | Ordinary Portland Cement (OPC) Concrete Pipe |
| Measured advantage | 8.5-fold lower acid reactivity constant (4.70 vs 40.15) and 4.5-fold higher strength retention (8% vs 36% loss) after 90 days in 2% H2SO4 compared to OPC pipe |
| Time to first revenue | 14 months |
The full analysis goes to the list
Mechanism, operating protocol with real conditions and yields, computed unit economics with a six-scenario stress test, the absence audit, and every resolved citation.
Assessed 2026-08-29 against seven gates plus the voiding sub-tests. How the method works · Browse all concepts