WO2007055556A1 - Procede de fabrication de ciment portland presentant des proprietes optiques et de conduction electrique - Google Patents

Procede de fabrication de ciment portland presentant des proprietes optiques et de conduction electrique Download PDF

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Publication number
WO2007055556A1
WO2007055556A1 PCT/MX2006/000124 MX2006000124W WO2007055556A1 WO 2007055556 A1 WO2007055556 A1 WO 2007055556A1 MX 2006000124 W MX2006000124 W MX 2006000124W WO 2007055556 A1 WO2007055556 A1 WO 2007055556A1
Authority
WO
WIPO (PCT)
Prior art keywords
portland cement
clinker
plaster
cement
electrical conduction
Prior art date
Application number
PCT/MX2006/000124
Other languages
English (en)
Spanish (es)
Inventor
Sergio Omar GALVÁN CÁZARES
Joel SOSA GUTIÉRREZ
Original Assignee
Concretos Translúcidos, S. De R.L. De C.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Concretos Translúcidos, S. De R.L. De C.V. filed Critical Concretos Translúcidos, S. De R.L. De C.V.
Priority to EP06824218A priority Critical patent/EP1955985A4/fr
Priority to US12/084,746 priority patent/US20090218552A1/en
Publication of WO2007055556A1 publication Critical patent/WO2007055556A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/02—Portland cement
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/2015—Sulfate resistance
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/80—Optical properties, e.g. transparency or reflexibility
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/90—Electrical properties
    • C04B2111/94—Electrically conducting materials

Definitions

  • the present invention relates to a cement that has optical and electrical properties that significantly differ from those existing in the state of the art, and the method of manufacturing thereof.
  • Portland cement corresponds to a specific type of cement whose resistance properties are due to its compassion and manufacturing process or method.
  • the method and composition of Portland cement is as follows:
  • a clay material and a limestone material are crushed, mixed and ground to reduce them to fine dust.
  • the composition of this mixture must remain constant within narrow limits, since any departure from the optimum point would be detrimental to the quality.
  • Mixing and grinding can be done dry (dry way) or with water (wet way). Again, it is essential, whatever the method of preparation, that the mixture has the correct dosage, is finely ground and intimately mixed before entering the oven.
  • the mixture then goes to the rotary kiln where it is slowly heated to the clinker point. Water and carbon dioxide have been expelled before reaching the clinkerization zone. When approaching the hottest regions, chemical reactions occur between the constituents of the raw mixture. During these reactions new compounds are formed and some of them melt, leaving the charge partially molten.
  • the clinker then falls to one of the different chillers, or is placed in the clinker heap where it is cooled, sometimes, with a rain of water. When it is cold, it is mixed with a carefully calculated amount of cooked or raw plaster and the mixture is ground until it becomes a very fine powder, which is the Portland cement of commerce.
  • the calcium plaster or sulfate is added in small quantities in the final milling to control the setting time and avoid false setting. However, if the plaster content is not properly monitored, a small variation in the established proportions of the main components in the ground rock mixture may be sufficient to completely alter the characteristics of the mixture or the properties of the cement.
  • the cement thus obtained has characteristics similar to those of a rock when hardening, which behaves as a high density dielectric solid that prevents the passage of light through it, also has a large volumetric weight and mechanical behavior similar to that of a rock.
  • a second object is to describe a composition and method of manufacturing Portland cement that has improved electrical conduction properties to that of known cements.
  • a third object of the present invention is to provide a composition and method of manufacturing Portland cement, which has properties of being translucent and / or conductor of small electrical currents that also have high mechanical resistance to stress and a long service life.
  • the limestone usable materials are: limestone, cement rock, crete, loam, seashells and alkali manufacturing waste.
  • Limestones or other calcareous substances rich in magnesium carbonate are generally inadequate because an amount greater than 5% of magnesia is considered harmful in Portland cement, and is not allowed in normal specifications. Veins of plaster or pyrite can make the sulfate content of the product excessive. The crete sometimes contains flint nodes that must be removed, and the loam may have an excessive amount of siliceous sand.
  • Loam is a sedimentary calcareous material formed at the bottom of some lakes and often mixed with lots of small shells. Important deposits of marls and seashells are exploited in Michigan, USA and in
  • the clay materials that can be used to make Portland cement are: clay, slate, shale, blast furnace slag, ashes and cement rocks.
  • the first step in the mixing of raw materials must be taken in the quarry with the use of steam spoons, gathering a spoonful of clay and two of stone, or two wagons of one rock and three of another.
  • the rock must now pass through a battery of crushers and become gravel.
  • the mixture then goes to the rotary kiln where it is slowly heated to 1450 degrees Celsius to the point of clinkerization. Water and carbon dioxide have been expelled before reaching the clinkerization zone. When approaching the hottest regions, chemical reactions occur between the constituents of the raw mixture. During these reactions new compounds are formed and some of them melt, leaving the charge partially molten.
  • the clinker then falls to one of the different chillers, or is thrown into the clinker heap where it cools. If the mixture is done as said, then, by constant monitoring of the lime content of the same, different changes in the quantities of clay or limestone can be introduced, when thrown into the crushers, if these changes are necessary to conserve an approximate constancy in the composition, but if it is seen that the ground stone that is in the deposits has a greater or lesser content of lime, the content of two or more deposits is mixed in such a way that the proportion of the mixture remains closest to the appropriate composition.
  • the clinker cooling can be by means of a closed air circulation cooler, where the clinker cooling air is used as secondary or even primary combustion air in the furnaces, allowing fuel economy, as well as better calcination. of the clinker, the immediate use of the clinker for the mill and greater ease of grinding, as well as better strengths and greater stability of volume in the cement.
  • the clinker When the clinker is passed to the mills, it is mixed with a carefully calculated amount of a retarder, consisting of gypsum stone (CaSO4.2H20) or cooked plaster (CaSO4 Vi H2O), because without this, when mixing the cement with water to form the concrete can set too quickly.
  • a retarder consisting of gypsum stone (CaSO4.2H20) or cooked plaster (CaSO4 Vi H2O)
  • Ia limits the alumina content of the mixture.
  • the mixture of clinker and raw or cooked plaster is ground with a surface area that is specified for each type of cement, since the cement will develop resistance much faster as it becomes thinner.
  • this glass powder includes those existing in the market, as long as they do not have in their composition a content greater than 5% of magnesia.
  • the granulometry of this powder should be less than a millimeter in diameter.
  • the amount of glass powder to be used must be 5% of the total weight of the plaster stone or cooked plaster.
  • the content of pieces of epoxy resins should be highly controlled and monitored throughout the grinding process, and should be added since the clinker is previously cooled and does not have a temperature above 75 degrees Celsius.
  • the resin content should be between 30% and 54% of the weight of the clinker, the optimum being 46%,
  • the granulometry of the resins to be used in this grinding must have at least 55% resins with a diameter greater than 20 millimeters, and a maximum content of 45% resins with a diameter less than 15 millimeters. It is also important that the materials (resins and clinker) are finely pulverized and uniformly mixed, since if the materials are not finely mixed, the reactions will not be uniform throughout the mass. An area of resin particles can be dragged so far from another, of acidic components, that those that remain in the form of free resins.
  • the content of coke type breeze must be highly controlled and monitored throughout the milling process, and must be added since the clinker is previously cooled and does not have a temperature above 55 degrees Celsius.
  • the carbon content should be between 37% and 49% of the clinker's weight, the optimum being 42.7%.
  • the particle size of the coke to be used in this grinding must have at least 45% coke with a diameter greater than 12 millimeters; and a maximum content of 55% coke with a diameter less than 7 millimeters. It is also important that the materials (coke and clinker) are finely pulverized and uniformly mixed, since if the materials are not finely mixed, the reactions will not be uniform throughout the mass. An area of coke particles can be dragged so far from another, of acidic components, that those that remain in the free coke form.
  • the grinding process must be such that a fineness between 3450 and 3850 cm2 / g is obtained, which must be monitored by means of the percentage of material that passes through a sieve of the number 100 or 200 (free light of the mesh 0.147 and 0.074 millimeters, respectively).
  • the cement does not have the aforementioned fineness, it must return to a new grinding stage until the established one is obtained.
  • silos for at least a period of 3 days, and not more than 6, so that all the small amounts of lime that have remained without combining during calcination are hydrated and carbonate by reaction with the water and carbon dioxide of the air and can then lose the expansion that would occur if these particles were maintained without combining lime.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

L'invention concerne un procédé de fabrication de ciment Portland translucide et/ou conducteur, de résistance élevée aux sulfates, qui a une vie utile pouvant aller jusqu'à 70 ans dans des conditions de service normales et qui, après avoir pris, laisse passer la lumière et acquiert jusqu'à 70 % de sa résistance finale dans les 48 heures suivant sa prise. Le procédé de fabrication selon l'invention est caractérisé en ce qu'il présente une finesse supérieure à 3450 cm2/g et en ce qu'il présente, lorsqu'il prend, une résistance mécanique entre 75 MPa et 250 MPa, sans la moindre addition d'additifs, ce qui permet d'obtenir la réduction d'eau nécessaire pour obtenir un certain affaissement.
PCT/MX2006/000124 2005-11-11 2006-11-10 Procede de fabrication de ciment portland presentant des proprietes optiques et de conduction electrique WO2007055556A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06824218A EP1955985A4 (fr) 2005-11-11 2006-11-10 Procede de fabrication de ciment portland presentant des proprietes optiques et de conduction electrique
US12/084,746 US20090218552A1 (en) 2005-11-11 2006-11-10 Method of Producing Portland Cement Having Electrical Conduction and Optical Properties

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
MXPA/A/2005/012186 2005-11-11
MXPA/A/2005/012185 2005-11-11
MXPA05012185 MXPA05012185A (es) 2005-11-11 2005-11-11 Metodo de fabricacion de cemento portland translucido.

Publications (1)

Publication Number Publication Date
WO2007055556A1 true WO2007055556A1 (fr) 2007-05-18

Family

ID=38023494

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MX2006/000124 WO2007055556A1 (fr) 2005-11-11 2006-11-10 Procede de fabrication de ciment portland presentant des proprietes optiques et de conduction electrique

Country Status (3)

Country Link
CN (1) CN101341106A (fr)
MX (1) MXPA05012185A (fr)
WO (1) WO2007055556A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1177995A (en) * 1967-11-22 1970-01-14 Komarek Greaves And Company Improvements in or relating to the production of Portland Cement
EP0393189A1 (fr) * 1988-09-23 1990-10-24 Kazakhsky Khimiko-Tekhnologichesky Institut Procede d'obtention du clinker de ciment de portland

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1177995A (en) * 1967-11-22 1970-01-14 Komarek Greaves And Company Improvements in or relating to the production of Portland Cement
EP0393189A1 (fr) * 1988-09-23 1990-10-24 Kazakhsky Khimiko-Tekhnologichesky Institut Procede d'obtention du clinker de ciment de portland

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1955985A4 *

Also Published As

Publication number Publication date
MXPA05012185A (es) 2007-05-10
CN101341106A (zh) 2009-01-07

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