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Geopolymer infrastructure

Pourable Stone™

The chemistry of stone, made pourable.

What it is

The chemistry of cast stone.

Geopolymers are inorganic binders formed when aluminosilicate minerals react with an alkaline activator. Instead of firing limestone in a kiln, the reaction builds a dense, stone-like mineral network at low temperature. Poured into a mold, it sets into cast stone.

Material analysis in the Harmonic laboratory
Harmonic laboratory · Material analysis
  1. Mineral precursors
  2. Alkaline activator
  3. Mix & pour
  4. Low-temperature cure
  5. Cast stone
Compared

Different materials. Different chemistry.

PropertyPortland cement concreteWood framingPourable Stone™
Made byLimestone fired at ~1,450°CHarvested and milled timberMinerals activated chemically, no clinker kiln
FireNon-combustible, can spallCombustibleNon-combustible, engineered for high-heat exposure
Rot, mold, termitesNot susceptibleSusceptibleNot susceptible
Acid & sulfate attackVulnerable in sewers and soilsNot applicableDesigned for resistance
Salt waterSteel corrosion from chloride ingressRot and marine borersDesigned for low chloride penetration
OrnamentCostly to form or carveHand-carvedCast detail repeatable from one mold

Performance claims for Pourable Stone™ are design targets pending independent testing. See Validation.

Regional by design

Sourced within Southern California

  1. 01

    Natural pozzolans from the Mojave Desert

  2. 02

    Recycled glass from regional material recovery facilities

  3. 03

    Volcanic pumice from the Owens Valley

  4. 04

    Chopped basalt fiber reinforcement

Our origins

From ancient walls to modern infrastructure

Our work began in the field, studying how ancient builders in the Americas shaped stone. That research informs a modern material.

Explore the research →

From formulation to proof.

See the testing program →