Ashcrete actually is different and uses fly ash which is a by product from burning coal.
Material other than concrete for walls.
Ferrock is an alternative component that uses industrial waste typically made from steel dust which works better than traditional concrete and can absorb better than concrete as well.
Straw bales are mainly used to build the inner frame of the walls of a home by replacing other building materials like concrete gypsum fiberglass plaster wood or stone.
Other potential filler materials that.
If used as a feature wall or highlight it can be a cost effective way to create a signature style as can be seen in this playful kids bedroom.
These fillers include waste bottom ash from coal fired power generation stations not just the marketable fly ash currently used in portland based concrete.
Straw bales are used.
Straw bales if sealed properly offers a high level of insulation properties.
Straw bales not only affordable but also sustainable because of their renewable properties.
A great solution to complement your plaster walls is to wallpaper them to create just the right feeling for a room.