Viable Fiber

Trying out h**pcrete insulation using 1” hurd. This formulations uses lime, minerals, water and h**p hurd creating a hard, carbon negative material good for insulation and soundproofing.

“h**pcrete binder is composed of 50% hydrated lime (we use Graymont’s Ivory Finish Lime) and 50% Metapor metakaolin from Poraver (created as a by-product of the company’s expanded glass bead production). The metakaolin causes the lime to have a partially hydraulic set, speeding up hardening time and promoting faster drying of the material.

We mix our wall-insulation h**pcrete at a ratio of 1 part chopped h**p hurd by weight, with 1.5 parts of the binder by weight. After translating these weights to volume measurements, it approximates 4 buckets of h**p hurd going into the mixer with 1 bucket of binder (1/2 lime, 1/2 metakaolin).”

Insulation Alternative: H**pcrete Creating locally sourced lime and clay binders for use in h**pcrete, an insulation alternative.