• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A dry cement mixture comprises Portland cement and an ultra-fine component consisting of at least one ultra-fine additive, said ultra-fine component being a hydraulic binder and Portland cement being present in an amount of at least 70% by weight of the mixture and the ultra-fine component fine component in an amount of at least 5% by weight of the mixture, wherein the ultra-fine component has a particle size distribution characterized by a particle diameter 010 between 0.5pm and 2pm and a particle diameter 090 between 2pm and 8pm.
    公开号:AT516111A2
    申请号:T10/2015
    申请日:2015-01-08
    公开日:2016-02-15
    发明作者:
    申请人:Holcim Technology Ltd；
    IPC主号:
    专利说明:

    The invention relates to a dry cement mixture comprising Portland cement and an ultra-fine component consisting of at least one ultra-fine additive, the ultra-fine component being a hydraulic binder, and a concrete composition comprising said cement mixture.
    Concrete is a very widely used construction material with high strength and good durability. In addition to aggregates and water, it also contains Portland cement as a hydraulic binder which, when in contact with water, produces strength-forming phases through solidification and curing. Concrete based on Portland cement clinker is thus one of the most important binders worldwide.
    By the addition of various additives, e.g. granulated blast furnace slag (gbfs), fly ash, natural pozzolans, calcined clays or ground limestone, Portland cement can be made into Portland composite cements with different properties. At the same time, due to the substitution of Portland cement by these additives, the specific emission of CO2 in the production of cement is reduced, since during the production of Portland cement clinker approx. 0.9 tons of CO2 per ton of Portland cement clinker by the calcination of the starting materials and in the oxidation of the Fuels are emitted into the rotary kiln. The addition of additives to Portland cement has been standard practice for more than 100 years and is regulated in numerous cement and concrete standards.
    The addition of ultra-fine additives, such as microcement or microsilica, to Portland cement is used to improve the life and strength of the resulting concrete. The traditional way of formulating concrete with high durability and strength and concrete with highest durability and strength is based on the use of conventional Portland cement with ultrafine aggregates as binder. The often used ultra-fine aggregates are often conditioned in bags and are mixed manually in the concrete plant or on site in the Portland cement, which
    Security risks as well as quality imponderables. The ultra-fine aggregates can also be stored in a dedicated silo in a concrete plant and fed in automatically, but this requires the need for very specific industrial components that represent additional investment.
    Another disadvantage of using ultra-fine additives in a cementitious mix is the increased water requirement as water demand increases with increasing fineness of the ultra-fine additives.
    It is generally believed that the durability and strength of the resulting concrete, such as compressive strength, is strongly dependent on the proportion of ultra-fine additives in the cement mix, namely that the higher the level of durability and strength of the concrete Content of ultra-fine additives. The production of ultra-fine aggregates is expensive due to the increased grinding costs. Therefore, the cost of
    Cement mixture with increasing content of ultra-fine aggregates.
    Therefore, it is an object of the present invention to provide a cementitious mixture which overcomes the above disadvantages. In particular, it is an object of the invention to provide a cementitious mix which allows a simple and reliable production of stable quality concrete. It is a further object of the invention to reduce the water requirement without affecting the processability of the concrete mass.
    Furthermore, the resulting concrete should provide excellent durability and strength at reasonable production costs.
    To solve these and other objects, the invention is characterized in that Portland cement is present in an amount of at least 70% by weight, preferably at least 80% by weight of the mixture, and the ultra-fine component in an amount of at least 5 Wt .-% of the mixture is present, wherein the ultra-fine component has a particle size distribution characterized by a particle diameter Dio between 0.5pm and 2pm and a particle diameter Dgo between 2pm and 8pm.
    Thus, the invention provides a premixed binder based on a combination of Portland cement with at least one ultra-fine additive.
    The ultra-fine particles are added to the mixture, whereby a binder exhibiting high performances (durability and strength) is obtained and therefore particularly adapted to the formulation of high performance and high performance concrete. The mixing is carried out in a cement plant with a dedicated device, which introduces the various components with high accuracy, which allows obtaining a very homogeneous mixture. The cement mix of the invention is preferably delivered to customers as a dry premix for concrete production, with the dry premix being packaged in bags or other suitable containers.
    The invention enables concrete manufacturers to produce concrete with high strength and high durability with only one binder, rather than mixing conventional cement with ultra-fine aggregates (such as fumed silica) on site. The customer benefits from the consistent quality of the concrete produced, the ease of use (resulting in cost savings), the high performance of the concrete produced and the aesthetics (the premix binder color is lighter than most traditional cements and ultra-fine aggregates used ).
    It has surprisingly been found that a relatively low content of ultra-fine components, together with a certain particle size distribution, results in durability and compressive strength values which otherwise can only be achieved with a significantly higher level of ultrafine additives. In particular, the invention provides Portland cement in an amount of at least 80% by weight of the mixture so that the mixture contains a maximum of 20% by weight of the ultra-fine component. According to the invention, the ultra-fine component is a hydraulic binder and has a particle size distribution characterized by a
    Particle diameter Dio between 0.5μιη and 2μπι and a particle diameter D90 between 2μιη and 8μm.
    The ultra-fine component of the cement mixture may consist of one, two or more ultra-fine additives. According to a preferred embodiment of the invention, the at least one ultra-fine additive comprises slag, in particular ground blast-furnace slag. More specifically, the at least one ultra-fine additive comprises slag, in particular ground blast-furnace slag, in an amount of > 70% by weight, in particular > 80% by weight.
    According to another preferred embodiment of the invention, the ultra-fine component (consisting of one or more ultra-fine additives) has a content of slag, in particular ground
    Blast furnace slag, from > 70% by weight, in particular > 80 wt .-%, on. Thus, the ultra-fine component consists mainly of slag particles.
    The cement mixture may contain other additives in addition to the ultra-fine component.
    According to a preferred embodiment of the cement mixture, the Portland cement is present in an amount of at least 85% by weight, preferably at least 90% by weight of the mixture, and the ultra-fine component is in an amount of at least 7% by weight, preferably at least 10% by weight of the mixture is present. Thus, the maximum content of the ultra-fine component is limited to 15% by weight.
    According to another preferred embodiment, the weight ratio of Portland cement and the ultra-fine component is between 85/15 and 95/5, in particular about 90/10.
    As noted above, the ultra-fine component has a particle size distribution characterized by a particle diameter Dio between 0.5pm and 2pm, while the ultra-fine additives typically have a lower D10 to achieve the required shelf-life standards. In contrast, it has surprisingly been found that the specific Di0 range, as mentioned above, also provides sufficient durability and strength of the concrete, while at the same time reducing water requirements and costs.
    According to a preferred embodiment, the ultrafine component has a particle size distribution characterized by a particle diameter Di0 between 0.7 pm and lpm.
    With regard to the Dgo value, the ultra-fine component preferably has a particle size distribution characterized by a particle diameter D90 between 4pm and 6pm. These preferred Dgo values can be combined with the preferred Dio values mentioned above.
    Particularly good results were achieved using an ultra-fine component having a particle size distribution characterized by a particle diameter Dioo of 10pm-15pm, especially 12pm.
    In the context of the present invention, the particle size distribution is defined by specifying specific percentiles of the particle diameter. The Dgo percentile indicates that 90% of the particles have a diameter smaller than the given value. For example, a value for Dgo of 4pm may indicate that 90% of the particles have a diameter that is less than 4pm. Analogously, the Di0 percentile of diameter indicates that 10% of the particles have a diameter smaller than the given value.
    In order to optimize the durability and strength of the resulting concrete, a certain particle size distribution of the Portland cement can also be adjusted. Preferably, the Portland cement has a particle size distribution characterized by a particle diameter Dio between lpm and 3pm, preferably between l, 6pm and 2pm, especially l, 8pm, and a particle diameter Dgo between 30pm and 60pm, preferably between 35 and 45μπι, especially 40pm on.
    The Portland cement is preferably a CEM I cement according to EN 197-1.
    The invention further relates to a concrete composition comprising a cementitious mix according to the invention, aggregates and water. Preferably, the water / cement ratio is selected between 0.3 and 0.6.
    Finally, the invention also relates to a structural element, the concrete manufactured under
    Use of a concrete composition as described above.
    In the following, the invention will be explained in more detail with reference to an exemplary embodiment.
    Example 1:
    A dry cement mixture with the following components was prepared. 90% by weight Portland cement of the type CEM I 52.5 N 10% by weight of an ultra-fine blast furnace slag binder.
    Portland cement with the following particle size distribution was used: Dio = Ι, δμπι and Dgo = about 4 0pm
    Ultra-fine blast furnace slag binder with the following particle size distribution was used: Dio = about Ο, δμτη and Dgo = about 5,5μπι
    The resulting mixture had the following composition:
    Clinker: 86.06% by weight
    Blast furnace slag: 7.8% by weight
    Plaster: 5.6% by weight
    Anhydrite: 0.3% by weight
    Dust: 0.2% by weight - NaCl: 0.04% by weight
    Example 2:
    Concrete was made from the dry cement mixture as described in Example 1. The following components were mixed in a blender: 410 kg of the dry cement mixture as described in Example 1 907 kg of aggregates with a nominal maximum diameter of the coarse fraction of 12.5 mm 797 kg of sand with a nominal maximum diameter of the coarse fraction of 4 mm 90 kg limestone -Filling material
    Additives for concrete liquefaction in the amount of 1.2 wt .-% of dry cement mixture 160 1 of water
    The wet concrete mass was poured into a mold and cured to obtain a concrete block having the following mechanical strength values: Compressive strength: - 1 day: 39 MPa - 7 days: 7 6 MPa - 28 days: 89 MPa Bending strength: - 28 days: 6 MPa Young's modulus: 28 days: 44 GPa
    Example 3:
    Concrete was made from the dry cement mixture as described in Example 1. The following components were mixed in a blender: 450 kg of the dry cement mixture as described in Example 1 930 kg of aggregates with a nominal maximum diameter of the coarse fraction of 12.5 mm 790 kg of sand with a nominal maximum diameter of the coarse fraction of 4 mm 80 kg limestone -Filling material
    Additives for concrete liquefaction in the amount of 2.0% by weight of the dry cement mixture 148 1 of water
    The wet concrete mass was poured into a mold and cured to obtain a concrete block having the following mechanical strength values: Compressive strength: - 1 day: 49 MPa - 7 days: 81 MPa - 28 days: 94 MPa
    Flexural strength: - 28 days: 6 MPa Young's modulus: 28 days: 43 GPa
    Example 4:
    A comparative study was conducted between concretes consisting of the following: A / C50 / 60 with conventional Portland cement B / C50 / 60 with a dry cement mixture with optimized dosage C / C60 / 75 with conventional Portland cement and silica dust addition D / C60 / 75 with a dry cement mixture
    The terms " C50 / 60 " and " C60 / 75 " refer to the strength classes according to Eurocode 2 (European Standard EN 1992). For example, C50 / 60 means that the concrete must have a cylinder crush strength of 50 N / mm2 and a cube compressive strength of 60 N / mm2. A / C50 / 60 with conventional Portland cement: 425 kg of conventional Portland cement 315 kg of aggregates with a nominal maximum diameter of the coarse fraction of 12 mm 670 kg of aggregates with a nominal maximum diameter of the coarse fraction of 20 mm 730 kg of sand with a nominal maximum diameter of Coarse part of 4mm
    Additives for concrete liquefaction in the amount of 1.3 wt .-% of the dry cement mixture 175 1 water
    The wet concrete mass was poured into a mold and cured to obtain a concrete block having the following mechanical strength values: Compressive strength: - 1 day: 12 MPa - 7 days: 47 MPa - 28 days: 56 MPa - 90 days: 57 MPa
    Abrasion resistance coefficient (according to the Compagnie Nationale du Rhone protocol): C = 0.5
    Shock resistance (according to the Compagnie Nationale du Rhone protocol):
    Volume brought about by the blows = 108 cm3
    The concrete block had the following properties regarding durability: - Internal porosity: 12.6% - Gas permeability: 119 E-18 m2 - Chloride diffusion coefficient (migration test in stationary electric field): 6.8 E-12 m2 / s B / C50 / 60 with a dry cement mixture with optimized dosage 390 kg of the dry cement mixture as described in Example 1 315 kg of aggregates with a nominal maximum diameter of the coarse fraction of 12 mm 670 kg of aggregates with a nominal maximum diameter of the coarse fraction of 20 mm 765 kg of sand with a nominal maximum Diameter of the coarse part of 4 mm
    Additives for concrete liquefaction in the amount of 1.2 wt .-% of the dry cement mixture 180 1 of water
    The wet concrete mass was poured into a mold and cured to obtain a concrete block having the following mechanical strength values: Compressive strength: - 1 day: 9 MPa - 7 days: 44 MPa - 28 days: 53 MPa - 90 days: 57 MPa
    Abrasion resistance coefficient (according to the Compagnie Nationale du Rhone protocol): C = 0.5
    Shock resistance (according to the Compagnie Nationale du Rhone protocol):
    Volume brought about by the blows = 118 cm3
    The concrete block had the following durability characteristics: - Internal porosity: 13% 2 - Gas permeability: 76 E-18 m - Chloride diffusion coefficient (stationary electric field migration test): 8.0 E-12 m2 / s C / C60 / 75 with conventional portland cement + silica dust addition: 415 kg conventional Portland cement 270 kg of aggregates with a nominal maximum diameter of the coarse fraction of 12 mm 700 kg of aggregates with a nominal maximum diameter of the coarse fraction of 20 mm 800 kg of sand with a nominal maximum diameter of the coarse fraction of 4 mm 25 kg Addition of silicate dust
    Additives for concrete liquefaction in the amount of 1.8% by weight of the dry cement mixture 161 1 of water
    The wet concrete mass was poured into a mold and cured to obtain a concrete block having the following mechanical strength values: Compressive strength: - 1 day: 22 MPa - 7 days: 56 MPa - 28 days: 70 MPa - 90 days: 75 MPa
    Abrasion resistance coefficient (according to the Compagnie Nationale du Rhone protocol): C = 0.3
    Shock resistance (according to the Compagnie Nationale du Rhone protocol):
    Volume brought about by the blows = 103 cm3
    The concrete block had the following properties regarding durability: - Internal porosity: 11.8% - Gas permeability: 40 E-18 m2 - Chloride diffusion coefficient (migration test in stationary electric field): 0.4 E-12 m2 / s D / C60 / 75 with a dry cement mixture: 440 kg of the dry cement mixture as described in Example 1 270 kg of aggregates with a nominal maximum diameter of the coarse fraction of 12 mm 700 kg of aggregates with a nominal maximum diameter of the coarse fraction of 20 mm 800 kg of sand with a nominal maximum diameter of Coarse part of 4 mm
    Additives for concrete liquefaction in the amount of 1.8% by weight of the dry cement mixture 147 1 of water
    The wet concrete mass was poured into a mold and cured to obtain a concrete block having the following mechanical strength values: Compressive strength: - 1 day: 15 MPa - 7 days: 63 MPa - 28 days: 74 MPa - 90 days: 75 MPa
    Abrasion resistance coefficient (according to the Compagnie Nationale du Rhone protocol): C = 0.3
    Shock resistance (according to the Compagnie Nationale du Rhone protocol):
    Volume brought about by the blows = 91 cm3
    The concrete block had the following durability properties: - Internal porosity: 8.9% 2 - Gas permeability: 72 E-18 m - Chloride diffusion coefficient (migration test in stationary electric field): 2.2 E-12 m2 / s
    This study demonstrates that the performance of the dry cementitious mix of the invention enables the amount of binder in the concrete to be reduced without affecting its mechanical strength development and durability. This works just as well as blends of conventional Portland cement and ultra-fine, expensive ones
    High-performance additives such as silica fume - both from a mechanical point of view and durability. The dry cement mix of the invention enables the production of high performance concrete in a simple manner and at an optimized cost.
    权利要求:
    Claims (14)
    [1]
    Claims 1. A dry cement mixture comprising Portland cement and an ultra-fine component consisting of at least one ultra-fine additive, said ultra-fine component being a hydraulic binder, characterized in that Portland cement is present in an amount of at least 70% by weight. the mixture is present and the ultra-fine component is present in an amount of at least 5 wt .-% of the mixture, wherein the ultra-fine component has a particle size distribution characterized by a particle diameter Di0 between 0.5pm and 2pm and a particle diameter D90 between 2μπι and 8pm.
    [2]
    2. dry cement mixture according to claim 1, characterized in that Portland cement in an amount of at least 80 wt .-%, preferably at least 85 wt .-% of the mixture is present.
    [3]
    3. dry cement mixture according to claim 1, characterized in that Portland cement in an amount of 70-79 wt .-% of the mixture is present.
    [4]
    4. dry cement mixture according to claim 1, 2 or 3, characterized in that Portland cement in an amount of at least 85 wt .-%, preferably at least 90 wt .-%, of the mixture is present and the ultra-fine component in an amount of at least 7 wt .-%, preferably at least 10 wt .-%, of the mixture is present.
    [5]
    5. dry cement mixture according to one of claims 1 to 4, characterized in that the weight ratio of Portland cement and the ultra-fine hydraulic component between 85/15 and 95/5, in particular about 90/10, is located.
    [6]
    6. dry cement mixture according to one of claims 1 to 5, characterized in that the ultra-fine component has a particle size distribution characterized by a particle diameter Dio between 0.7pm and lpm.
    [7]
    7. dry cement mixture according to one of claims 1 to 6, characterized in that the ultra-fine component has a particle size distribution characterized by a particle diameter D90 between 4pm and βμπι.
    [8]
    8. dry cement mixture according to one of claims 1 to 7, characterized in that the ultrafine component has a particle size distribution characterized by a particle diameter D100 of 10pm - 15pm, in particular 12pm.
    [9]
    9. dry cement mixture according to one of claims 1 to 8, characterized in that the Portland cement a particle size distribution characterized by a particle diameter Dio between lpm and 3pm, preferably between Ι, βμτη and 2μπι, in particular l, 8pm, and a particle diameter D90 between 30pm and 60μτη , preferably between 35 and 45pm, in particular 40μιη having.
    [10]
    10. dry cement mixture according to one of claims 1 to 9, characterized in that the Portland cement is a CEM I cement according to EN 197-1.
    [11]
    11. dry cement mixture according to one of claims 1 to 10, characterized in that the at least one ultrafine additive slag, in particular ground blast furnace slag, in an amount of> 70 wt .-%, in particular > 80% by weight.
    [12]
    12. Dry cement mixture according to claim 11, characterized in that the ultra-fine component has a content of slag, in particular ground blast-furnace slag, of > 70% by weight, in particular > 80 wt .-%, has.
    [13]
    13. A concrete composition comprising a cement mixture according to any one of claims 1 to 12, additives and water.
    [14]
    14. A construction element comprising concrete produced using a concrete composition according to claim 13. Vienna, 8 January 2015 Applicants by:

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    同族专利:
    公开号 | 公开日
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    CA2955310C|2021-12-14|
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    US20170197883A1|2017-07-13|
    PL3169642T3|2018-12-31|
    WO2016009257A1|2016-01-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPH03170354A|1989-11-29|1991-07-23|Nittetsu Cement Co Ltd|Ultrahigh early strength cement composition|
    RU2098372C1|1990-06-25|1997-12-10|Дзе Риджентс Оф Дзе Юниверсити Оф Калифорния|Binding agent for concrete or concrete mortar, method of producing dense concrete and concrete|
    FI90054C|1991-02-19|1993-12-27|Suomen Kuonajaloste Oy|MASUGNSSLAGGBETONG MED HOEG HAOLLFASTHET|
    JP3423913B2|2000-02-24|2003-07-07|太平洋マテリアル株式会社|Ultra fine cement|
    US6562122B2|2000-09-18|2003-05-13|Halliburton Energy Services, Inc.|Lightweight well cement compositions and methods|
    JP2003137618A|2001-11-02|2003-05-14|Kawatetsu Mining Co Ltd|Blast furnace slag fine powder containing inorganic admixture, blast furnace cement, and method of producing them|
    US7799128B2|2008-10-10|2010-09-21|Roman Cement, Llc|High early strength pozzolan cement blends|
    FR2943663B1|2009-03-25|2011-05-06|Lafarge Sa|CONCRETE AT HIGH OR ULTRA HIGH PERFORMANCE|
    CA2786920A1|2010-02-18|2011-08-25|Lafarge|Foamed concrete|
    EP2558431B1|2010-04-15|2020-06-03|Roman Cement, Llc|Narrow psd hydraulic cement and cement-scm blends|US10737980B2|2017-01-10|2020-08-11|Roman Cement, Llc|Use of mineral fines to reduce clinker content of cementitious compositions|
    US11168029B2|2017-01-10|2021-11-09|Roman Cement, Llc|Use of mineral fines to reduce clinker content of cementitious compositions|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA567/2014A|AT515922B1|2014-07-17|2014-07-17|Dry cement mixture|
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    PCT/IB2015/001017| WO2016009257A1|2014-07-17|2015-06-23|Dry cement mixture|
    PL15739669T| PL3169642T3|2014-07-17|2015-06-23|Dry cement mixture|
    ES15739669.8T| ES2683543T3|2014-07-17|2015-06-23|Dry cement mix|
    US15/326,879| US9963390B2|2014-07-17|2015-06-23|Dry cement mixture|
    EP15739669.8A| EP3169642B1|2014-07-17|2015-06-23|Dry cement mixture|
    CA2955310A| CA2955310C|2014-07-17|2015-06-23|Dry cement mixture|
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