Abstract: The method includes subjecting the pozzolans in crushed state to a high energetic mechanical processing by grinding in a grinding equipment, whereby the pozzolan particles receive mechanical impulses, and the grinding is carried out for a predetermined time resulting in a compressive strength of a 2 inch side cube of mortar having 80% Portland cement and 20% natural pozzolan in a ratio of 1:2.75 to standard sand and in addition water required to obtain a flow of the mortar according to American standard ASTM C 109, which has been properly compacted under vibration and hardened at +20° C. in sealed condition, which after 28 days is ?75% of the compressive strength of a 2 inch side cube, treated as the cube, of a mortar having a ratio of Portland cement:sand of 1:2.75 and water corresponding to 48.5% of the weight of Portland cement.

Abstract: A vibratory mill principally for the treatment of cement and fly ash, which mill has a grinding chamber (1) with a wall (6, 7) at each of the two ends of the chamber, which mill includes an inlet (2) for material that is to be treated and an outlet (3) at the rear wall (7) of the grinding chamber (1), at the lower part of the grinding chamber, and a first wall (5) inside the chamber at the end at which the outlet (3) is located, which wall (5) is provided with one or several openings (8) at its upper part, which openings allow passage of material that has been sufficiently ground from the grinding chamber to the outlet (3). The inlet (2) is located in the lower part of the grinding chamber (1) at the wall (6) that is opposite to the location of the outlet.

Abstract: The method includes subjecting the pozzolans in crushed state to a high energetic mechanical processing by grinding in a grinding equipment, whereby the pozzolan particles receive mechanical impulses, and the grinding is carried out for a predetermined time resulting in a compressive strength of a 2 inch side cube of mortar having 80% Portland cement and 20% natural pozzolan in a ratio of 1:2.75 to standard sand and in addition water required to obtain a flow of the mortar according to American standard ASTM C 109, which has been properly compacted under vibration and hardened at +20° C. in sealed condition, which after 28 days is ?75% of the compressive strength of a 2 inch side cube, treated as the cube, of a mortar having a ratio of Portland cement:sand of 1:2.75 and water corresponding to 48.5% of the weight of Portland cement.

Abstract: A vibratory mill principally for the treatment of cement and fly ash, which mill has a grinding chamber (1) with a wall (6, 7) at each of the two ends of the chamber, which mill includes an inlet (2) for material that is to be treated and an outlet (3) at the rear wall (7) of the grinding chamber (1), at the lower part of the grinding chamber, and a first wall (5) inside the chamber at the end at which the outlet (3) is located, which wall (5) is provided with one or several openings (8) at its upper part, which openings allow passage of material that has been sufficiently ground from the grinding chamber to the outlet (3). The inlet (2) is located in the lower part of the grinding chamber (1) at the wall (6) that is opposite to the location of the outlet.

Abstract: Method for processing of pozzolans comprising fly ash such as Class F and/or Class C fly ash used for preparation of mortars and concretes, characterized in, that the pozzolans is subjected to a high energetic mechanical processing by means of grinding in a grinding equipment to a fineness of the final product with a retention on a sieve 30 microns being less than 5%, whereby the pozzolan particles receive mechanical impulses when non-cenosphere in the form of coarse scoria particles are disintegrated and whereby the surface of cenosphere grinded particles is activated.

Abstract: Method for processing of pozzolans comprising fly ash such as Class F and/or Class C fly ash used for preparation of mortars and concretes, characterized in, that the pozzolans is subjected to a high energetic mechanical processing by means of grinding in a grinding equipment to a fineness of the final product with a retention on a sieve 30 microns being less than 5%, whereby the pozzolan particles receive mechanical impulses when non-cenosphere in the form of coarse scoria particles are disintegrated and whereby the surface of cenosphere grinded particles is activated.

Abstract: A processing arrangement for manufacturing composite cementitious materials, such as hydraulic blended cements, with significantly reduced Portland clinker minerals content. The arrangement includes a milling unit for pregrinding supplementary cementitious materials and highly reactive pozzolans or mineral fillers, such as fly ash, blast furnace slag, fine quartz, granitic quarry fines, and the like, and a milling unit for pregrinding the Portland cement. The pregrinding units are followed by grinding unit for grinding the preground components. The pregrinding units are adapted to work as an open circuit or as a closed circuit for the material being ground.

Abstract: A processing arrangement for manufacturing composite cementitious materials, such as hydraulic blended cements, with significantly reduced Portland clinker minerals content. The arrangement includes a milling unit for pregrinding supplementary cementitious materials and highly reactive pozzolans or mineral fillers, such as fly ash, blast furnace slag, fine quartz, granitic quarry fines, and the like, and a milling unit for pregrinding the Portland cement. The pregrinding units are followed by grinding unit for grinding the preground components. The pregrinding units are adapted to work as an open circuit or as a closed circuit for the material being ground.

Abstract: A process for producing blended cement in which the cement contains Portland Cement mixed thoroughly with a microfiller, and possibly a water reducing agent, to provide a dry cement mixture, and fine supplementary cementitious materials selected from the materials blast furnace slag, fly ash, quartz, silica, amorphous silicon dioxide, limestone, and recycled concrete. The supplementary materials are first subjected to a grinding step in a dry state to a specific surface of at least 1000 cm2/g (Blaine). In a second step the ground supplementary materials are subjected to a grinding step together with at least 20% by weight of the total grinding mass of a highly reactive cement mixture in a dry state, to achieve a specific surface of at least 3000 cm2/g (Blaine).

Abstract: A method for treatment of fly ash for incorporation into and for preparation of mortars and concretes. Fly ash is intensively blended with a highly reactive and dry cement mixture that is obtained by mixing Portland cement with a microfiller and possibly a water reducing agent. The blend of fly ash and Portland cement is then ground in a vibratory milling device to achieve a final product fineness having a particle size to provide retention on a 45 &mgr;m sieve of less than 15 percent by weight of the blend.

Abstract: Method for treatment of fly ash for preparation of mortars and concretes.

Abstract: A process for producing blended cement, where the cement contains Portland Cement mixed thoroughly with a microfiller and possibly a water reducing agent to a dry cement mixture and fine supplementary cementitious materials selected from the materials blast furnace slag, fly ash, quartz, silica, amorphous silicon dioxide, limestone and recycled concrete.

Abstract: A method of stabilizing the ground underlying roadways. Cement is mixed thoroughly with a microfill agent, and optionally a water reducing agent, to obtain a highly reactive and dry cement mixture. The dry cement mixture is blended with at least one of the materials soil, clay, or stone, and sufficient water so that after compaction the blend will have a compressive strength of at least 5 MPa after 28 days. The blend is spread on the ground to a thickness of at least 15 to 30 centimeters and a roadbed is laid over the blend after the blend has cured.

Abstract: A method of treating cement clinker by grinding the clinker in a tubular mill while charging water, gypsum, and, optionally, also a water-reduction agent to the mill at the same time. The water has a pH of from about 9 to about 13. A microfill agent and/or a water-reduction agent is mixed with said the high pH-value water to form a slurry, which is added to the clinker during the grinding process together with microfill agent and/or water-reduction agent in a dry state. The high pH value of the water can be obtained by electrolysis.