Method for producing a carbonate bonded, press-moulded article

A method for producing carbonate bonded, press-moulded articles, which method comprises the steps of:

• providing a particulate material which is carbonatable and which contains water;
• press-moulding the particulate material to form compacts;
• and
• carbonating the particulate material in said compacts to produce carbonates thus transforming the compact into said carbonate bonded, press-moulded articles, the particulate material being carbonated by bringing the compacts in contact with a gas which contains at least 1 vol. % of carbon dioxide,
• wherein
• before press-moulding the particulate material to form said compacts, at least one sample thereof is subjected to a test wherein the sample is compressed with an increasing compaction pressure until water starts to be expelled from said sample as from a lower compaction pressure;
• and
• the particulate material is press-moulded to form said compacts with a compaction pressure which is selected within a range delimited by a lower and an upper compaction pressure limit, the lower compaction pressure limit being higher than 5 MPa and the upper compaction pressure limit being at least 7 MPa smaller than said lower compaction pressure.