Abstract: A method for producing calcium sulfoaluminate cement comprises the steps of providing thermal energy by combustion of sulphur and/or a sulphur-containing compound, reacting sulphur oxides produced by combustion of the sulphur and/or sulphur-containing compound with a mixture of calcium oxide and/or carbonate, and alumina and/or its hydrates to form a sulphur-containing mixture, heating the sulphur-containing mixture using the thermal energy to produce a clinker, and reacting remaining sulphur oxides produced by combustion of the sulphur and/or sulphur-containing compound with lime. The sulphur and/or sulphur-containing compound preferably comprises elemental sulphur, sour crude, sour gas or calcium sulfate.

Abstract: A concrete mixture for forming a breathable concrete. The mixture comprises aggregate particles and a paste comprising water, cement or cement substitute, and plasticizer. The plasticizer controls the viscosity of the paste such that the paste forms a substantially uniform layer coating the particles, with the coated particles in contact, while allowing spaces to be retained there between. These spaces interconnect forming channels through the concrete, allowing air to permeate there through such that the concrete exhibits good dynamic insulation properties, whist retaining structural strength.

Abstract: A concrete mixture for forming a breathable concrete. The mixture comprises aggregate particles and a paste comprising water, cement or cement substitute, and plasticiser. The plasticiser controls the viscosity of the paste such that the paste forms a substantially uniform layer coating the particles, with the coated particles in contact, whilst allowing spaces to be retained there between. These spaces interconnect forming channels through the concrete, allowing air to permeate there through such that the concrete exhibits good dynamic insulation properties, whist retaining structural strength.

Abstract: The present invention concerns an air permeable panel (1) for an intermediate cladding layer having filtering characteristics. Such cladding layers are for use in breathing buildings where the building walls provide filtering characteristics. The panel comprises a plurality of projections (3) interconnected in a lattice configuration, said projections being arranged to face in a common direction for engagement in use with said intermediate cladding layer. The projections (3) are formed from pointed hollowed elements, which are interspersed with apertures.

Abstract: The present invention relates to a cladding material, for a building or other construction. The cladding material comprises an outer air permeable cover (3) an inner air permeable cover (4) and an intermediate layer (2). The intermediate layer has a graduated filtering profile for allowing selective particle filtration, thereby enhancing filtration through depth and hence delay clogging.