• 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:
    It is proposed a high or ultra high performance cement and aggregate concrete concrete consisting of m3 concrete from 400 to 850kg cement, 700 to 2000kg aggregate, 100 to 300kg water and 20 to 850kg compound mixture consisting of 5 to 50% microsilica with a minimum grain size from 0.005μm and with a maximum grain size of 20μm, from 5 to 50Gew% of quartz powder of a first mixture with a minimum grain size of 0.01μm and with a maximum grain size of 50μm and from 5 to 95Gew% of a second mixture with a minimum grain size of 0.1 μm and with a maximum grain size of 200 μm. The improved mixture allows a low-cost and technically advantageous storage and advantageous transport to a job site.
    公开号:AT516171A4
    申请号:T50804/2014
    申请日:2014-11-04
    公开日:2016-03-15
    发明作者:Rainer Staretschek；Reinhard Kräuter
    申请人:Rainer Staretschek；Gebrüder Dorfner Gmbh & Co Kaolin Und Kristallquarzsand Werke Kg；
    IPC主号:
    专利说明:

    The invention relates to high- or ultra-high performance concrete made of cement, premix and aggregate.
    For the last few years intensive research has been carried out into the development of concretes with ever higher compressive strengths. Ultrahigh-strength concrete (UHPC) with compressive strengths of up to 200 MPa represents the current state of development in this context. For example, EP 2 411 342 A1 discloses such a high-performance or ultra-high-performance concrete. The high strength of the ultra-high-power Be¬tons is essentially due to a granulometric optimization of the packing density and the reduction of the water-binder ratio.
    In addition to the optimization of the concrete composition, the description of the mechanical properties of ultrahigh-performance concrete and the development of design rules in recent years have been in the foreground. Despite the exceptional mechanical properties and excellent durability properties, ultrahigh performance concrete has been used mainly in pilot projects. As a mass product, he could not yet penetrate. The causes, besides lack of experience in handling high performance concrete, both planners and contractors, are the high cost of the raw materials and the manufacturing technology. For the production of ultra-high performance concrete many fines are needed, which in addition to cement and the use of quartz powder and microsilica is required. Furthermore, high-dose superplasticizers based on polycarboxylate ethers can find high-quality additives, in particular based on mineral substances, and steel fibers for increasing the ductility of the material. The fines microsilica, quartz powder and cement must be stored dry, so that usually several silos are needed for material storage. Known compositions, so-called compound mixtures or "premix" have the disadvantage that, in addition to the fillers, they also contain cement and frequently even aggregates, which considerably increases the storage volume and the transport volume and, in the case of contained cement and its moisture sensitivity special storage requirements. The coveted, required materials must be transported over long distances to your place of use as often as possible, which results in high transport costs.
    The invention is therefore based on the object of specifying a flocculation or ultra-high performance concrete in an improved mixture, which in particular also permits low-priced and technically advantageous storage and advantageous transport to a place of use. It is a composition, so a Com¬poundmischung or a "premix" to be specified, which allows a simplified Anmi¬schen a Flochleistungsbetons, the transport volume can be significantly reduced, so that no longer the entire material required transported over long distances to your place of use but local sources of raw materials can be used.
    The invention solves this problem with a high-performance or ultrahigh power concrete of m3 concrete from 400 to 850kg of cement, 700 to 2000kg of aggregate, 100 to 300kg of water and 20 to 850kg of compound compound consisting of 5 to 50% microsilica with a minimum grain size from 0.005 pm and with a maximum particle size of 20 pm, from 5 to 50 wt% of quartz powder of a first mixture with a minimum particle size of 0.01 pm and with a maximum particle size of 50 pm and from 5 to 95 wt% of quartz powder of a second mixture with a minima grain size of 0.1 pm and with a maximum grain size of 200pm.
    Particularly preferably, the compound mixture consists of 5 to 50% by weight of microsilica with a minimum particle size of 0.01 μm and with a maximum particle size of 6 μm, from 5 to 50% by weight of quartz powder of a first mixture with a minimum
    Grain size of 0.1 pm and with a maximum grain size of 30 pm and from 5 to 95 wt% of quartz powder of a second mixture with a minimum grain size of 0.5 pm and with a maximum grain size of 60 μm.
    The compound mixture according to the invention (= in the following composition o-the premix) contains only microsilica and quartz powder of defined particle size. Only the compound mixture and, if appropriate, a flow agent or steel or other fibers may have to be supplied over further routes in corresponding containers, such as silos or big bags, for example. The cement and further necessary aggregate can always be obtained from local cement or gravel works or building material dealers. The above-mentioned aggregate aggregates are aggregates customary for this purpose based on e.g. Quartz sand, calcium carbonate, basalt, river sand or other materials alone or mixtures of these, but preferably quartz-containing, aggregates having a quartz content of> 50% by weight, more preferably having a quartz content of> 90% by weight. As described above, the invention relates to the provision of high or ultra high performance concrete (HPC / UHPC). In the following two materials are always meant, even if only ultra-high performance concrete (UHPC) is mentioned in the text.
    In the development of the concrete according to the invention, in addition to the quality, particular attention was paid to the costs of the individual components in order to keep the overall costs low overall. It is therefore preferred to always use locally available cement. Only high quality cements should be used, paying particular attention to the water content of the cement. C3A has proven to be free cements.
    Apart from the quality and the costs, in the development of the concrete, attention was paid to a technically comparatively simple way of producing the concrete according to the invention. The special composition of the compound mixture ensures that no special technical requirements for the mixing technology are necessary for the production of the concrete according to the invention.
    The Compond mixture is stored and delivered, for example, in a silo or in big bags. A vote on the type of cement used and the vorhan¬denen factory mixer may be required. Since the microparticles in the compound mixture are homogenized in advance, it is possible to use mixers with a low mixing intensity for the production of the tint according to the invention.
    Furthermore, various additives can be required for the production, depending on the requirement. These can be stored like conventional aggregates. In addition, 2 to 50kg of flux can be mixed per m3 of concrete. In addition, up to 250kg (steel) fibers can be mixed per m3 of concrete.
    The aggregate preferably has a maximum particle size of 5000 pm, and can be obtained from local building material dealers or ballast works.
    The aggregate may be mono-, bi- or multimodal and may be added as a material having one grain or may be added in the form of two or more materials each having the same or different grain sizes within the above-mentioned grain size.
    Through the use of locally available cement, the compound mixture, a preferably also locally present aggregate aggregate and a low content of (steel) fibers (if structurally required) is provided with regionally available products a high quality ultra high performance concrete with defined properties.
    The invention also relates to a compound mixture for producing a high or ultra-high performance concrete, comprising a compound mixture of 10 to 40% by weight microsilica with a minimum particle size of 0.01 pm and a maximum particle size of 6 pm, from 10 to 50 wt% of quartz powder of a first mixture with egg A minimum grain size of 0.1 pm and a maximum grain size of 30 pm and from 20 to 80 wt% of quartz powder of a second mixture with a minimum grain size of 0.5 pm and a maximum grain size of 60 pm.
    The compound mixture, additives, in particular flow agents, in a mass of 0.3 to 20 wt.%, In particular from 0.3 to 10 wt.% And / or fibers, in particular steel fibers, in a mass of 0.3 to 75 wt %, in particular from 0.3 to 60% by weight. specific embodiment:
    Compound mixture grain size
    % By weight of the compound [m] max [m] pound mixture
    Microsilica 0.01 6 22.4
    Quartz flour 1 0,1 30 25,9
    Quartz flour 2 0,5 60 51,7
    The compound mixture is premixed, homogenized, and stored in a silo, bag, or sack until blending of the high or ultra high performance concrete. Depending on the desired fresh and hardened concrete properties, between 400 and 800 kg of cement are required. The amount also depends on the type of cement used, since not every cement has the same water requirement. Based on the cement paste, 5-100% by mass of compound mixture is added. Further, between 700 and 2000 kg charges (various stone aggregates, depending on requirement 1 to 3 or more different) is required. The water cement value is between 0.2 and 0.35. Based on the cement paste 0.5 to 6 mass percent of flow agents are used. The steel fiber content is 0 - 250 kg / m3.
    During the development of the compound mixture, care was taken that a high-performance or ultra-high performance concrete could be produced in a technically comparatively simple manner, in particular the mixing technology, the energy input and the time required. This is achieved by the special compounding of the mineral mixture.
    The upper aggregate is stone aggregates customary for this purpose and based on e.g. Quartz sand, calcium carbonate, basalt, river sand or other materials alone or mixtures thereof, but preferably quartz-containing aggregates having a quartz content of> 50% by weight, more preferably having a quartz content of> 90% by weight.
    An improved concrete can be produced with the compound mixture according to the invention, even if this may not fulfill the strength criteria for high-performance or ultra-high-performance concrete. For the concrete and the compound mixture, improved processing properties (e.g., flowability) and better material properties, e.g. a high salt resistance, a high temperature and thermal shock resistance, a high acid resistance, low gas permeability, low water permeability or low porosity
    The high-performance or ultra-high-performance concrete according to the invention is preferably used in structural and non-structural applications as well as e.g. as Vergu߬ or coating material, for Kraftteinleitungs- and -übertragungsbereiche and for the repair of highly stressed structures or for sewerage and Anla¬genbau the chemical industry or for the production of precast concrete parts and self-compacting systems.
    The total formulation for every 1 m3 of concrete is thus as follows:
    Total formulation [kg / m3] from to
    Cement mass 400 850
    Compound mixture 20 850
    Aggregate 700 2000
    Water 100 300
    Flow agent 2 50
    Steel fibers 0 250
    The aggregates mentioned above are aggregates customary for this purpose and based on e.g. Quartz sand, calcium carbonate, basalt, river sand or other materials alone, or mixtures of these, preferably, however, quartz-containing aggregates having a quartz content of> 50% by mass, more preferably having a quartz content of> 90% by mass.
    The aggregate may be mono-, bi- or multimodal and may be added as a material having a grain or may be added in the form of two or more materials each having the same or different grain sizes within the above mentioned grain size span.
    Besides the above-described production of high or ultra-high performance concrete using the compound mixture according to the invention, it is also possible to obtain concretes with special technical properties, even if these are not covered by the classical definition of HPC or UHPC.
    For example, by varying the above-mentioned materials within the stated amount-by-mass and particle size ranges, improved ketones can be prepared, e.g. characterized by better processing characteristics (e.g., flowability) or better material properties such as a high salt resistance, a high temperature and Temperaturwechselbestrieg¬keit, a high acid resistance, low gas permeability, low water permeability or low porosity in addition to a high strength. In each case of the mentioned criteria better than would be the case for a concrete without the addition of the compound mixture.
    Accordingly, with these HPC, UHPC or improved concretes according to the invention, both technical and economical advantages can be achieved in the known applications, such as e.g. supporting or non-supporting components of the applications, but it can also be used to develop new applications in which HPC, UHPC or even improved concrete could not be used, e.g. Coatings.
    In the drawing, the subject invention is shown, for example. It shows
    Fig. 1 is a schematic representation of the mixing of Be¬tons invention and
    Fig. 2 shows the grading curves of the starting materials used and an exemplary compound mixture.
    For the production of high or ultra-high performance concrete cement from ei¬nem cement silo 1, a compound mixture of a Premixsilo 2, rock granules from a camp 3, water, eluent and optionally retarder from a Behäl¬ter 4 and steel fibers 5 in a mixer 6, mixed and subsequently processed in the usual manner (FIG. 1).
    In Fig. 2, the grading curves of the starting materials used Compoundmi¬schung are shown. The cumulative fraction [vol.%] Of the individual components is represented by the particle size [m], the particle size being represented logarithmically. The sieve lines of microsilica 7, quartz powder of a first mixture 8 and quartz powder of a second mixture 9 and the grading curve of the entire compound mixture are entered.
    权利要求:
    Claims (10)
    [1]
    1. High- or ultra high-performance concrete of cement and aggregate be¬ standing per m3 concrete from 400 to 850 kg of cement, 700 to 2000kg aggregate, 100 to 300kg of water and 20 to 850kg of a compound mixture of 5 to 50Gew% microsilica with a minimum grain size of 0.005 pm and with a maximum particle size of 20 pm, from 5 to 50 wt% of quartz powder of a first mixture with a minimum particle size of 0.01 μm and with a maximum particle size of 50 μm and from 5 to 95% by weight of quartz powder of a second mixture with a minimum particle size Grain size of 0.1 pm and with a maximum grain size of 200pm.
    [2]
    2. High-performance or ultra-high performance concrete according to claim 1, characterized gekennzeich¬net that the compound mixture of 5 to 50Gew% microsilica with a minima¬len grain size of 0.01 pm and with a maximum grain size of 6pm, from 5 to 50Gew% quartz powder of a first Mixture with a minimum grain size of 0.1 pm and with a maximum grain size of 30 pm and from 5 to 95 wt% of quartz powder of a second mixture with a minimum grain size of 0.5 pm and with a maximum grain size of 60 pm.
    [3]
    3. High-performance or ultra-high performance concrete according to claim 1 or 2, characterized in that per m3 of concrete 2 to 50 kg superplasticizer, in particular based on polycarboxylate ethers, are admixed.
    [4]
    4. high- or ultra-high performance concrete according to one of claims 1 to 3, characterized in that each m3 concrete up to 250kg of fibers, in particular steel fibers, are mixed.
    [5]
    5. High- or ultra-high performance concrete according to one of claims 1 to 4, characterized in that the aggregate has a maximum grain size of 5,000pm.
    [6]
    6. High or ultra-high performance concrete according to one of claims 1 to 5, characterized in that the aggregate has a minimum particle size of 100pm and a maximum particle size of 1000pm, in particular a minimum particle size of 300pm and a maximum particle size of 800pm.
    [7]
    7. Compound mixture for producing a high or ultra high performance Be¬tons, characterized in that it consists of 5 to 50Gew% microsilica with a mi¬nimalen grain size of 0.005pm and with a maximum grain size of 20 pm, from 5 to 50Gew% quartz powder of a first mixture with a minimum particle size of 0.01 μm and with a maximum particle size of 50 μm and from 5 to 95% by weight of quartz powder of a second mixture with a minimum particle size of 0.1 μm and with a maximum particle size of 200 μm.
    [8]
    8. A compound mixture according to claim 7, characterized in that it comprises from 5 to 50% by weight of microsilica with a minimum particle size of 0.01 μm and a maximum particle size of 6 μm, from 5 to 50% by weight of quartz powder of a first mixture with a minimum particle size of 0.1 μm and with a maximum particle size of 30 μm and from 5 to 95% by weight of quartz powder of a second mixture with a minimum particle size of 0.5 μm and with a maximum particle size of 60 μm.
    [9]
    9. Compound mixture according to claim 7 or 8, characterized by the addition of additives, in particular flow agents, in a mass of 0.1 to 30Gew.%, In particular from 1 to 20 wt.%.
    [10]
    10. Compound mixture according to one of claims 7 to 9, characterized by the addition of fibers, in particular steel fibers, in a mass of 0.3 to 70 wt.%, In particular from 0.3 to 60 wt.%.
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    同族专利:
    公开号 | 公开日
    AT516171B1|2016-03-15|
    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50804/2014A|AT516171B1|2014-11-04|2014-11-04|High or ultra high performance concrete made of cement and aggregate|ATA50804/2014A| AT516171B1|2014-11-04|2014-11-04|High or ultra high performance concrete made of cement and aggregate|
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