摘要:
A method of preparing a blended cement composition is provided. The method comprises intergrinding a composition comprised of a major amount by weight of portland cement clinker, a minor amount by weight of a pozzolanic material and a grinding aid in an amount of from about 0.1 % to about 5 % based on the total weight of portland cement clinker and pozzolanic material, said grinding aid being comprised of a naphthalenesulfonate formaldehyde condensate.
摘要:
The cement composition contains a) 10 - 35 wt.% cement, in particular portland cement b) 65 - 90 wt.% of a synthetic puzzolan, which was obtained by at least partial reduction of residues of combustion with a SiO2/CaO ratio > 1, like for example garbage incineration dross, and contains alkali oxide (Na2O and K2O) in quantities of over 1.5 wt.%, c) an activator for reducing the positive surface potential of the synthetic puzzolan, like for example anion-active or anionic tensides, in particular sulfonates.
摘要:
The invention relates to mortar or concrete produced with a hydraulic binder, comprising aggregates from cinders from the bottom of municipal waste incinerators and/or from slurry from wastewater treatment plants, or other natural or artificial aggregates, of different particle sizes depending of the use thereof as mortar or concrete, and a binder consisting of: glass and/or other pozzolans; pure Portland clinker with gypsum or plaster of Paris, or the resulting cements following the grinding thereof; and/or optionally lime, depending on the quantity of glass and/or pozzolans; all of the materials forming the base of the binder being ground and mixed together until a binder is obtained, together with the aggregates, with cementing mineral neoformations and a strong pozzolanic character.
摘要:
The invention relates to a method for producing a clinker substitute material comprising the steps: providing a starting material containing dolomite and aluminium silicate, converting the starting material to the clinker substitute material by burning the starting material in the temperature range from >800 to 1100 °C or by burning the starting material in the temperature range from 725 to 950 °C in the presence of a mineraliser, and cooling the clinker substitute material. The invention further relates to a binder comprising cement and to the ground clinker substitute material.
摘要:
The present invention relates to a cement comprising Portland cement clinker and a clinker replacement material, wherein the clinker replacement material comprises a carbonate material and a clay material, the clay material being characterised in that the carbonate material and/or the clay material has been treated in such a way that no chemical reaction occurs between the clay minerals and the carbonate material.
摘要:
The present invention relates to a vitreous material with hardening properties as well as to the process for manufacturing same, derived from the melting at high temperature of materials with a certain chemical composition containing calcium, magnesium, silica, aluminium and iron, either in the form of oxides, carbonate or other compounds, and the subsequent cooling of the material preventing its crystallization due to its internal viscosity and to the quick cooling. After this process, the material acquires a vitreous state which, finely ground and mixed with Portland clinker and/or gypsum, and/or calcium hydroxide or cements, has hardening or hydraulic properties, i.e., the material hardens when it mixed with water, acquiring mechanical properties.
摘要:
The invention relates to mortar or concrete produced with a hydraulic binder, comprising aggregates from cinders from the bottom of municipal waste incinerators and/or from slurry from wastewater treatment plants, or other natural or artificial aggregates, of different particle sizes depending of the use thereof as mortar or concrete, and a binder consisting of: glass and/or other pozzolans; pure Portland clinker with gypsum or plaster of Paris, or the resulting cements following the grinding thereof; and/or optionally lime, depending on the quantity of glass and/or pozzolans; all of the materials forming the base of the binder being ground and mixed together until a binder is obtained, together with the aggregates, with cementing mineral neoformations and a strong pozzolanic character.
摘要:
The present invention relates to a rapid-setting hydraulic binder composition and, more specifically, to a hydraulic binder composition, which contains tricalcium aluminate (C3A) and dodecacalcium heptaaluminate (C12A7), and thus is rapidly set, has an easily adjustable setting time, and is bio-friendly.