Forty Freeze-Thaw Rounds at Minus Eighteen: Picking a SAP Grade
A 420 g/g SAP shed 8.4 percent of its water after 40 freeze-thaw cycles; a 280 g/g grade shed 1.9. What to specify instead of free-swell absorbency.
Lime at 180 kg per m³ Against Polymer at 22: Weighing Three Costs
Lime looks cheaper per tonne of leachate until you count the volume, mass and caustic handling. A four-line comparison that gives the real cost per cubic metre.
No Gravel, No Egg Crate: A Bare Polymer Floor at Fourteen Months
Three tanks on 3 cm of polymer, no gravel or egg crate. What the build saves in height and weight, the stuck solenoid that flooded it, and who should not try.
