Building product

A bio-aggregate based building product comprising a macroporous element formed from a mixture of:

• a calcium carbonate derived binder and a lignocellulosic bio-aggregate, in which the macroporous element has an air and/or vapor and/or water open matrix with a microcapillary structure formed by the lignocellulosic bio-aggregate,
• in which the porosity of the macroporous element is at least 50% of the bulk volume of the building product;
• and
• in which between 40% and 80% by weight of bio-aggregate granulates forming the lignocellulosic bio-aggregate have a maximum particle size falling within the lower 50% of the particle size range;
• and
• in which no more than 5% by weight of bio-aggregate granulates forming the lignocellulosic bio-aggregate have a maximum particle size falling within the upper 20% of the particle size range;
• and
• wherein the bio-aggregate based building product further comprises at least one rheological agent.

A bio-aggregate based building product comprising a macroporous element formed from a mixture of:

• a calcium carbonate derived binder and a lignocellulosic bio-aggregate, in which the macroporous element has an air and/or vapor and/or water open matrix with a microcapillary structure formed by the lignocellulosic bio-aggregate,
• in which the porosity of the macroporous element is at least 50% of the bulk volume of the bio-aggregate based building product;
• and
• in which between 40% and 80% by weight of bio-aggregate granulates forming the lignocellulosic bio-aggregate have a maximum particle size falling within the lower 50% of the particle size range;
• and
• in which no more than 5% by weight of bio-aggregate granulates forming the lignocellulosic bio-aggregate have a maximum particle size falling within the upper 20% of the particle size range;
• and
• wherein the bio-aggregate based building product further comprises fiber reinforcement.