• 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:
    Surface finish for concreted pavements comprising a mixture of cement and steel aggregates, where steel aggregates have a particle size of between 0.063 and 4 mm, and are present in a proportion of steel aggregate/cement of 2/1. Another object of the invention is a method for applying said surface finish to concrete pavements. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2683224A1
    申请号:ES201730408
    申请日:2017-03-23
    公开日:2018-09-25
    发明作者:Vanesa ORTEGA-LÓPEZ；José Antonio DE LA FUENTE ALONSO；Marta SKAF REVENGA；Ángel ARAGÓN TORRE；Juan Manuel MANSO VILLALAÍN
    申请人:Universidad de Burgos；
    IPC主号:
    专利说明:

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    SURFACE FINISH FOR CONCRETE PAVEMENTS AND APPLICATION PROCEDURE
    DESCRIPTION
    TECHNICAL FIELD OF THE INVENTION
    The present invention is encompassed in the field of construction materials industry.
    Specifically, the invention relates to a finished or grounding product for concrete paving, basically, comprised of a mixture of iron and steel aggregates and cement in a proportion of 2/1; which provides the concrete pavement with a uniform, resistant, smooth and durable surface.
    The method of applying said surface finish on a portion of concrete pavement is also object of the present invention.
    BACKGROUND OF THE INVENTION
    The usual composition of the surface finish or fratasado applied to concrete pavements consists of a mixture of quartz and cement, sometimes corundum.
    After the concrete poured into a portion of pavement has been compacted, vibrated and smoothed, and it begins to lose water due to surface exudation, the mixture of quartz and cement is evenly dusted on it, and the concrete is expected to harden in such that it is suitable to pass the mechanical means that carry out the corresponding failure of said portion of concrete pavement.
    These known solutions have the disadvantage that they require the exploitation of natural resources, in this case, quartz. It is known that the construction materials industry demands, increasingly, large amount of material that comes from natural resources, whose overexploitation can lead to the depletion of
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    these natural resources that required the passage of centuries to form, undermining the social demand for environmental protection and sustainable development.
    On the other hand, industries generate a large amount of waste that contains a high amount of recyclable items. For example, steel waste, that is, black slag waste from an electric arc furnace (EHEA) generated from the melting phase of scrap metal in steel mills. In the Spanish steel mills alone, almost two million tons are generated per year of black slag from an electric arc furnace (EHEA).
    Black slag electric arc furnace (EHEA) represents a shocking residue for the natural environment. Its reuse as a substitution of materials from natural resources would be a way to control environmental pollution and the overexploitation of resources.
    Currently, the black slag of electric arc furnace (EHEA) is reused in the manufacture of conventional concrete, mortars, bituminous mixtures, in the base and sub-base layers of roads, in railways, etc. However, it is not enough. The preparations of black slag electric arc furnace (EHEA) continue to exist, which drives us to look for new alternatives to the reuse of such waste to help reduce them.
    For this reason, it is necessary to design a surface finish or fratasado for concrete pavements that, in a simple and economical way, allow to overcome the disadvantages previously exposed.
    DESCRIPTION OF THE INVENTION
    The present invention is established and characterized in the independent claims, while the dependent claims describe other features thereof.
    The object of the invention is a surface finish or failure for concrete pavements, as well as its application procedure on a portion of concrete pavement.
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    The surface finish for concrete pavements comprises a mixture of steel slag aggregates from an electric arc furnace (EHEA) and cement slag, where iron and steel aggregates have a particle size of between 0.063 and 4 mm, and are present in an aggregate ratio 2/1 steel / cement steel.
    The application of the surface finish for concrete pavements is carried out according to the following steps:
    a) uniformly sprinkle the mixture of steel slag aggregates from an electric arc furnace (EHEA) and cement in an amount of between 3 and 4 kg / m2 on a portion of concrete, compacted, vibrated and smoothed pavement that begins to lose water by superficial exudation,
    b) wait for the concrete to harden to such an extent that it is capable of performing mechanical surface failing, and
    c) perform the mechanical surface failure.
    With the present finish, the appearance of chipping, cracks and stains that normally occur in the concrete over time is avoided, as well as its resistance to impact and abrasion wear compared to known quartz-based finishes is improved and cement.
    Likewise, although the properties and performance of the surface finish obtained are similar or equivalent to those of a fratasado made with quartz and cement, the following advantages are additionally provided:
    - materials from natural resources are replaced by recycled materials, thereby mitigating the overexploitation of quarries of these natural resources, and in turn, the storage of harmful steel slag for the environment is reduced.
    - the total energy used in the fabrication of the surface finish is reduced, since the need to invest energy in aggregate extraction processes is eliminated.
    - It also helps reduce the emission of polluting gases,
    commonly generated during the extraction of aggregates.
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    DETAILED EXHIBITION OF THE INVENTION
    The present invention is a surface finish for concrete pavements, which comprises a mixture of iron slag aggregates from electric arc furnace (EHEA) and cement.
    Steel aggregates have a particle size between 0.063 and 4 mm, and are present in the mixture in a steel / cement aggregate ratio of 2/1.
    With the present finish, the appearance of chipping, cracks and stains that normally occur in the concrete over time is avoided, as well as its resistance to impact and abrasion wear compared to known quartz-based finishes is improved and cement.
    For example, the following table shows the results of the impact resistance test for each type of finish, that is, steel aggregate / cement vs quartz / cement.
     UNE 83514 impact resistance
     Crater depth (mm) depending on the number of strokes
     Number of hits  2 4 6 8 10 12 14 16
     EHEA-Cement Finish  0.25 0.35 0.44 0.48 0.62 0.75 0.83 0.93
     Quartz Finish - Cement  0.26 0.37 0.49 0.64 0.83 0.95 1.12 1.44
    With the results shown in the table above, it is verified that the steel / cement aggregate finish has a greater impact resistance than the quartz / cement finish.
    Likewise, the following table shows the results of the abrasion resistance test for each type of finish, that is, steel aggregate / cement vs quartz / cement.
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     Abrasion wear resistance UNE EN 1338
     Footprint dimensions (mm)  Width Length L1 Length L2
     EHEA-Cement Finish  16.50 68.00 68.50
     Quartz-Cement Finish  16.83 68.50 68.69
    From the results shown in the table above, it can be concluded that the steel / cement aggregate finish has an abrasion resistance superior to the quartz / cement finish.
    It is also the object of the present invention, the method of applying the surface finish for concrete pavements described above.
    The surface finish is applied to a portion of concrete pavement, compacted, vibrated and smoothed, which begins to lose water due to surface exudation.
    First, the mixture of steel slag aggregates from an electric arc furnace (EHEA) and cement slag is uniformly sprinkled in an amount of between 3 and 4 kg / m2 on the portion of concrete, compacted, vibrated and smoothed pavement that begins to lose water by superficial exudation.
    Then, the concrete is expected to harden to such a degree that it is capable of performing mechanical surface failure.
    Finally, mechanical failure is carried out over the entire surface area of the pavement portion, in order to obtain the homogeneous compaction of the applied finish.
    权利要求:
    Claims (2)
    [1]
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    1. - Surface finish for concrete pavements comprising a mixture of steel slag aggregates from black slag electric arc furnace (EHEA) and cement, where steel aggregates have a particle size of between 0.063 and 4 mm, and are present in a 2/1 steel / cement aggregate ratio.
    [2]
    2. - Procedure for applying the surface finish for concrete floors of the previous claim, which comprises the following steps:
    a) uniformly sprinkle the mixture of steel slag aggregates from an electric arc furnace (EHEA) and cement in an amount of between 3 and 4 kg / m2 on a portion of concrete, compacted, vibrated and smoothed pavement that begins to lose water by superficial exudation,
    b) wait for the concrete to harden to such an extent that it is capable of performing mechanical surface failing, and
    c) perform the mechanical surface failure.
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    Kumar et al.2019|Performance Evaluation of Reclaimed Asphalt Pavement | Aggregates in Rigid Pavement: a Review
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    同族专利:
    公开号 | 公开日
    ES2683224B1|2019-03-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB875463A|1957-03-18|1961-08-23|Paul Maydl|Method of making mortar or concrete from blast-furnace slag|
    WO2012138088A2|2011-04-05|2012-10-11|삼우아이엠씨|High performance concrete composition using slag|
    KR20120118571A|2011-04-19|2012-10-29|유진기업 주식회사|Concrete composition using electric arc furnace slag|
    CN104003667A|2014-06-03|2014-08-27|上海宝冶钢渣综合开发实业有限公司|Hollow concrete partition wall plate and production method thereof|
    法律状态:
    2018-09-25| BA2A| Patent application published|Ref document number: 2683224 Country of ref document: ES Kind code of ref document: A1 Effective date: 20180925 |
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201730408A|ES2683224B1|2017-03-23|2017-03-23|Surface finish for concrete floors and application procedure.|ES201730408A| ES2683224B1|2017-03-23|2017-03-23|Surface finish for concrete floors and application procedure.|
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