Powdered composition, a pourable, water-containing, uncured biodegradable composition, a cured biodegradable article, preparation methods, and uses thereof

A pourable, water-containing, uncured and biodegradable composition comprising a mixture of a component A and a component B,

• wherein the component A comprises:
• 40 to 95 wt. % of a gypsum containing material that is environmentally acceptable;
• up to 60 wt. % of particles of at least one environmentally acceptable filler;
• and
• 3 to 10 wt. % of an environmentally acceptable binding agent;
• and
• wherein the component B comprises water;
• and
• wherein the weight ratio component A:component B varies from 100:40 to 100:100.

A method for the preparation of a cured and biodegradable article, said method comprising the step of:

• pouring a pourable, water-containing, uncured and biodegradable composition comprising a mixture of a component A and a component B,
• wherein the component A comprises:
• 40 to 95 wt. % of a gypsum containing material that is environmentally acceptable;
• up to 60 wt. % of particles of at least one environmentally acceptable filler;
• and
• 3 to 10 wt. % of an environmentally acceptable binding agent;
• wherein the component B comprises water;
• and
• wherein the weight ratio component A:component B varies from 100:40 to 100:100, into a mould;
• curing the pourable, water-containing, uncured and biodegradable composition contained in the mould;
• and
• recovering from the mould, the cured and biodegradable article.