Pumice And Pozzolan

The largest use of pumice in the United States is the production of lightweight concrete blocks and other lightweight concrete products. When this concrete is mixed, the vesicles remain partially filled with air. That reduces the weight of the block. Lighter blocks can reduce the structural steel requirements of a building or reduce the foundation requirements. The trapped air also gives the blocks a greater insulating value.

The second most common use of pumice is in landscaping and horticulture. The pumice is used as a decorative ground cover in landscaping and planters. It is used as drainage rock and soil conditioner in plantings. Pumice and scoria are also popular rocks for use as substrates in hydroponic gardening.

  • an abrasive in conditioning “stone washed” denim
  • an abrasive in bar and liquid soaps such as “Lava Soap”
  • an abrasive in pencil erasers
  • an abrasive in skin exfoliating products
  • a fine abrasive used for polishing
  • a traction material on snow-covered roads
  • a traction enhancer in tire rubber
  • an absorbent in cat litter
  • a fine-grained filter media
  • a lightweight filler for pottery clay