Lignin-Crete

POINT

• Contributing to natural carbon cycles and a decarbonized society by fixing CO2 through the use of lignin

  

  Concept of Lignin-Crete

  Lignin-Crete is a technology that utilizes “lignin,” a type of woody biomass generated during the papermaking process that uses timber.
  Woody biomass with lignin as its main component can be added at a rate of up to approximately 100 kg per 1 m³ of concrete, allowing it to fix around 220 kg of CO2. With careful formulation, the same amount of CO2 emitted during concrete production can be fixed in the concrete for long periods of time, contributing to environmental recycling and the realization of a decarbonized society.

• Can be added to concrete and mortar

  

  Lignin powder

  Lignin is in powder form and can be added to fresh concrete or mortar while ensuring practical strength, durability, and workability. The use of a dedicated admixture also helps maintain proper workability. In addition, since part of the sand is replaced with lignin, it reduces the amount of sand used and contributes to the conservation of natural resources. Even after demolition, the CO2 remains fixed and the material can be reused as recycled aggregate.

• Ongoing application to precast concrete products

  

  Product manufacturing

  Applying Lignin-Crete to precast concrete products such as blocks can further contribute to achieving a decarbonized society. The manufacturing process is the same as that for conventional precast products and does not require any special curing.