Formulation cockpit on a mass, volume, water, and calcium balanced engine. Mineral CO2 uptake is capped at the calcium inventory, lime calcination is fully counted, flexural strength is derived from compressive, and process gates flag any batch that cannot be cast, pressed, or printed as set.
ALL OUTPUTS ARE MODELED PROJECTIONS, NOT MEASUREMENTSSolid presets reproduce the figures published in the technical library and rest on the calibrated v2 engine. Dashed EXPLORATORY presets are high-biomass designs that depend on hurd comminution and service-life chemistry which are modeled and not yet calibrated against any measurement. Do not quote exploratory figures externally.
The governing constraint. Every gram of portlandite ends carbonated, pozzolanic, or unreacted. The CO2 ceiling is pinned to the carbonated share: mineral uptake is capped at 0.595 g CO2 per g Ca(OH)2 actually carbonated, and lime calcination stays on the emissions side regardless.
Net negativity, when it appears, is purchased with biomass. It never comes from lime arithmetic.
The engine enforces mass, volume, water, and calcium conservation and every stoichiometric ceiling; its trends are correct by construction. The strength calibration constants, however, are fitted to this project's modeled targets, because those are the only anchors that exist. The first real cube crush is worth more than every assertion in this tool. Three groups of constants are modeled and uncalibrated, and they carry most of the uncertainty in the exploratory grades. First, the hurd comminution response, meaning how envelope packing density rises, water absorption falls, and fiber toughness is lost as hurd is milled finer. A soak test on milled versus unmilled hurd would settle the absorption term, which is the one that decides whether a high-hemp printable mix exists at all. Second, the dry co-mill sealing effect at a fifth of hurd absorption, plus its interface benefit, pending the matched-batch trial of co-milled versus separately milled at equal water. Third, the service-life chemistry, meaning residual alkalinity, healing calcium, and the toughness surrendered to calcification. The NRD mill line reflects the vendor's energy claim; the mill moves energy and cost, not chemistry.