摘要:
A non-efflorescing cementitious body is formed from sources of calcium aluminate, calcium silicate, calcium sulphate and reactive silica, these ingredients being present in such relative proportions that, upon hydration, both monosulphate (C 3 A.CS.12H) and hydrated alumina (AH 3 ) are formed. Also disclosed is a hydraulic binder and a paste from which such bodies can be formed and a method for forming such bodies. In addition to exhibiting low efflorescence, these bodies retain satisfactory physical properties, especially good durability to natural weathering conditions.
摘要翻译:由铝酸钙,硅酸钙,硫酸钙和反应性二氧化硅的来源形成非风化的水泥体,这些成分以相对比例存在,使得在水合时,单硫酸盐(C 3 H 3)。 CS.12H)和水合氧化铝(AH 3 N 3)。 还公开了一种水硬性粘合剂和可从其形成这种体的糊状物以及用于形成这种物体的方法。 除了表现出低风化外,这些物体保持令人满意的物理性能,特别是对自然风化条件的良好耐久性。
摘要:
A non-efflorescing cementitious body is formed from sources of calcium aluminate, calcium silicate, calcium sulphate and reactive silica, these ingredients being present in such relative proportions that, upon hydration, both monosulphate (C 3 A.CS.12H) and hydrated alumina (AH 3 ) are formed. Also disclosed is a hydraulic binder and a paste from which such bodies can be formed and a method for forming such bodies. In addition to exhibiting low efflorescence, these bodies retain satisfactory physical properties, especially good durability to natural weathering conditions.
摘要:
The invention provides a process for the mineralization of carbon dioxide to form a magnesium carbonate compound, which process comprises contacting the carbon dioxide, in the free form, or in the form of an alkali metal carbonate or bicarbonate, with an alkali metal magnesium silicate to produce the magnesium carbonate compound.
摘要:
The invention relates to an installation for pre-calcination (20) of pulverulent mineral materials (22), intended for the production of cement, comprising a pre-calciner (14) including an enclosure (50), supply ducts (70) of the mineral materials into the enclosure, supply ducts (65, 66) of hot gases into the enclosure, at least one exhaust duct (71) of the hot gases from the enclosure, one first chamber (72) communicating with the enclosure, supply ducts (78) of waste materials (80) into the first chamber, at least one second chamber (74) communicating with the enclosure, at least one first mobile pushing part (86) arranged to push the waste material out of the first chamber, the second chamber being intended to receive the waste material pushed out of the first chamber, and at least one second mobile pushing part (86) arranged to push the waste material out of the second chamber.
摘要:
The present invention relates to a compression grinding process of at least one component of a hydraulic binder, said process comprising the compression of a bed of material (M) formed by this or these component(s) in a grinding zone (30), said process further comprising the addition of oil to the bed of material, via distribution means (66) located upstream of the inlet (32) to the grinding zone.
摘要:
The invention concerns a method for controlling at least one workability parameter of concrete (14) contained in a container (12) of a mixer (11) with a non-vertical axis of rotation. The method comprises the following steps: rotating the container at at least two different rotational speeds; determining, for each of said rotational speeds, a rotary drive torque C of the container, a shear stress value τ of the concrete and a speed gradient γ of the concrete according to the following relationships: τ = T (ω). C γ = G (ω). ω where T and G are predetermined functions; determining a relationship of change of shear stress τ on the basis of speed gradient γ by extrapolation and/or approximation from the determined values; and providing an indication of the workability parameter of the concrete from the relationship of change.