• 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:
    Additive inhibitor of biological growth in concrete structures and use, consisting of a solution composed of two antimicrobial agents, one bactericidal and fungicidal and another algicide and fungicide, a deaerating agent and a vehicle medium. The first antimicrobial agent of the family of polychlorophenoxyphenols and is incorporated between 20% and 40% on dry weight. The second of the family of isothiozolones and is incorporated between 15% and 20% on dry weight. The deaerating agent is an ionic deaerator, incorporated between 5% and 10% on dry weight. And the vehicular medium is limestone filler that is incorporated between 36% and 76% on dry weight. The use is for mass of concrete and/or mortar, for surface coating layer type cementitious grout or for cement-based paint, in doses between 0.1 and 0.5%. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2556167A1
    申请号:ES201431036
    申请日:2014-07-10
    公开日:2016-01-13
    发明作者:Antonio Aguado De Cea；Ignacio Segura Pérez；José María VAQUERO MARTÍNEZ；Francesc SERVOS ROS
    申请人:Universitat Politecnica de Catalunya UPC；
    IPC主号:
    专利说明:

    INHIBITOR ADDITIVE OF BIOLOGICAL GROWTH IN CONCRETE AND USE STRUCTURES

    DESCRIPTION
     5
    OBJECT OF THE INVENTION

    The invention, as expressed in the present specification, refers to an additive that inhibits biological growth in concrete structures and the use of said additive, which provides novel constitutive characteristics, which will be described in detail below, which represent a remarkable improvement of the current state of the art in its field of application.

    More particularly, the object of the invention is focused on an additive whose main function is to act as a reducer and / or inhibitor of biological growth (biofouling) on surfaces of cement-based building materials. Said additive is a substantial improvement of the antimicrobial agents available to date, since it combines various antimicrobial activities and improves the stability of the active ingredients in cement mixtures, preventing the use of the additive from damaging the final properties of the material and having no effects. Toxic to human beings or the environment.

    FIELD OF APPLICATION OF THE INVENTION

    The field of application of the present invention falls within the sector of the chemical industry, while covering the field of construction, focusing specifically on the manufacture of applicable antimicrobial products as an additive in building materials.

    BACKGROUND OF THE INVENTION 30

    As is known, concrete has a low susceptibility to be colonized by microorganisms due to its high alkalinity (pH 11-13). However, with the passage of
    time the values decrease due to the effect of the environmental conditions (washing by rainwater, carbonation, conditions of use). It is at that time when concrete can be colonized by certain microorganisms. In most cases, this colonization of concrete by microorganisms has negative effects. These effects range from purely aesthetic and visual, 5 to damage to the health of human beings, degradation of the structure by biological attack or loss of functionality.

    Despite the large number of disinfectants available in the market, it must be taken into account that many of the possible disinfectants must be rejected for their residual activity, so the number of agents with the possibility of being used is quite restricted.

    The development and use of antifouling products for concrete structures located in marine environments is a common technique in the world of civil engineering. The works of Muraoka in 1972 (“Antifouling Concrete”, Muraoka, James S; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF, 1972) already pointed towards the combination of various biocidal agents to achieve greater efficiency. There are several commercial products that act in this direction, such as the Zeomighty additive (Sinanen Zeomic Co. Ltd.), ConBlock MIC (Concrete Sealants Inc.) and 20 ConMicShield (ConShield Technologies Inc.).

    All the additives indicated above are specifically designed to address the problem of attack by Thiobacillus sp in waste transport pipes, without having been described activity against other types of microorganisms. 25 Likewise, these additives are designed to be added in concrete mass. This supposes:

    - High economic cost of the final solution, requiring large amounts of product. 30

    - Little effectiveness of the product, by amount of additive used, since a large part of the additive is not effective because it is inside the material that is not exposed

    There are, therefore, several questions that have to be overcome, with respect to the state of the art:

    - The biocidal agents to be used must be insoluble in water, so that the safety of the solution developed is guaranteed, both for human beings and for the environment in which the structure to be treated is located.

    - The previous issue entails the impossibility of making applications of the biocidal agents on an aqueous basis, implying the need to develop new substrates and 10 new ways of applying the growth inhibiting agents.

    - It is necessary to develop new ways of applying the biocidal additive, which allow obtaining an economically accessible solution, as well as efficient in terms of the amount of additive used per exposed surface of the material. fifteen

    - Finally, it is necessary to guarantee the durability of the biocide and of the coating, which abounds in the need to innovate in the biocidal agents to be used, in the formulation of the additive and in the form of application thereof on the construction material. twenty

    EXPLANATION OF THE INVENTION

    The need to obtain new biological growth inhibitor additives in concrete, which can be used, either for manufacturing new structures, or as coatings for pre-existing structures, from commercial products, is justified by the high costs derived from growth biological. An example of this situation is the growth of algae and other biological organisms in water transport channels, which entails pressure losses in the channel that reduce hydraulic performance, and can facilitate the occurrence of phenomena of biodeterioration of the concrete structure . It is also noteworthy the phenomenon of biodeterioration in sanitation pipes, by the action of bacteria such as Thiobacillus sp. Finally, highlight the importance of sanitation in agri-food concrete installations, which require high levels of asepsis.

    Therefore, the present invention advocates a novel product that allows the development of a new family of additives that inhibit biological growth in concrete, reducing maintenance costs of the affected structures, reducing the costs associated with cleaning and sanitation processes, in a definitive manner. allowing to increase the useful life of them and their benefits.

    In accordance with the above, the proposed product is a multicomponent solution, which allows acting on different microbial agents without compromising the final properties of the construction material. 10

    More specifically, said multicomponent solution is composed of two antimicrobial active ingredients, a deaerating agent and a vehicular medium.

    Each of the components of the proposed solution and the designed formulation are described below.

    The first component of the additive is a bactericidal and fungicidal agent that, without excluding other possible ones, is from the family of polychlorophenoxyphenols. This component acts primarily on the lipid metabolism of microorganisms, notwithstanding the fact that it may have other associated activities. The dosage of this first component would be between 20% and 40% on dry weight.

    The second component of the additive is an algicidal and fungicidal agent that, without excluding other possible ones, is from the isothiozolone family. This component acts primarily on the photosynthetic mechanism and protein synthesis of microorganisms, notwithstanding that it may have other associated activities. The dosage of this second component would be between 15% and 20% on dry weight.
      30
    The third component of the additive is a deaerating agent that, without excluding other possible ones, is an ionic deaerating agent. This component has the fundamental function of minimizing the occlusion of air in the construction material, resulting from the addition of the above antimicrobial agents. The dosage of this third
    component would be between 5% and 10% on dry weight.

    The last component of the additive is limestone filler. This component is used as a vehicle for the active ingredients. The dosage of this fourth component would be between 36% and 76% on dry weight. 5

    The additive of the invention can be applied, without prejudice in other possible ways, as a mass additive of the construction material (concrete and / or mortar), as an additive for a cementitious grout surface coating layer or as an additive for a base paint cement. In all cases of application, the dose of the additive would be between 0.1 and 0.5% by weight of dry material.

    Execution and test example.

    The results on a laboratory scale and field tests carried out with a specific embodiment of the recommended additive, which demonstrate the effectiveness of the product, are described below. Laboratory scale tests consisted of determining the influence of the present invention on the mechanical properties of cementitious materials, the possible leaching of the product, as well as the effect of inhibiting biological growth. twenty

    With respect to mechanical laboratory tests, they were carried out in accordance with the UNE-EN 196-1 standard.

    It was observed that, although there is a certain decrease in the mechanical properties of the material when compared with the standard samples, this difference is in no case greater than 15%, allowing adequate mechanical properties to be maintained. Likewise, it is necessary to remember that the object of the invention has no structural responsibility, although it is necessary to ensure mechanical properties that confer adequate product durability. 30

    Likewise, the influence of the additive dosage on the physical properties of the mixtures was verified; it was observed that the addition of this did not alter the consistency of the mixtures significantly to any of the dosages used. By
    On the other hand, the densities of the concrete, both in the hardened and in the fresh state, remained within the same order throughout the whole series of tests, giving differences of less than 2%.

    With regard to the leaching of the active substance, in the tests, carried out in accordance with the prenorma prEN 16105: 2010, as a general trend, it was observed that the amount of product released is increasing depending on the dose used, although the amount dissolved is minimal, even at the highest dose, since 1.58 mg / m2 would be equivalent to an accumulated leaching of less than 0.3 ppm, amount, well below the level that can be considered toxic (LD50> 2360 mg / kg) . Therefore, it can be said that the formula PL-UV-H-2B is sufficiently insoluble.

    As for the results corresponding to the evaluation of the properties of inhibition of biological growth, the effectiveness of the additive was evaluated against different types of microorganisms and carried out in accordance with ISO / CD 15 16869, against fungi, algae, bacteria and yeasts

    The first microorganism against which the effectiveness of the additive is evaluated is Escherichia coli, observing that the additive has a high growth inhibitory activity level at all the dosages evaluated, creating an inhibition halo around all concrete samples. The formulation also exhibits a good behavior against Staphylococcus aureus, at all the dosages used (development index of 0), preventing both surface growth and creating a halo of inhibition of development around the sample. As opposed to Aspergillus niger, higher dosages of the formulate are required so that an inhibition halo (development index of 0) is present, although the use of the formulation inhibits surface growth at all dosages.

    Regarding the effectiveness of the additive as an algae growth inhibitor, it can be said that it is highly effective against both species evaluated, 30 since acceptable results are obtained for all the dosages studied, preventing algae growth from being prevented. surface level and create a halo of inhibition around the concrete sample, obtaining a growth rate of 0.

    Field trials were carried out at the facilities of a port. On the ramp down from the jetty to the sea, in the area where the waves break, algae grow in a general way that causes serious problems for users and those responsible for the jetty. The seaweed makes the concrete ramp 5 become an extremely slippery firm making the action of lowering the boat to the sea is a dangerous act.

    To mitigate this problem at the time of greatest development of algae, the algae are removed by pressurized water. The cleaning process, together with the development of 10 algae, causes a deterioration of this part of the marina.

    The first test of the field trials consisted of the manufacture of mortar specimens (consisting of a mixture of sand, cement and water) of dimensions 40X40X160 mm. The mixtures were treated with the product described above, added in the mortar mass during its manufacture.

    The trial sought to verify the effectiveness of the treatment against algae growth at a time of the year when the weather conditions were much more conducive to the development of algae. For this, a photographic report was made 20 of the test specimens under study, for 8 weeks.

    The sample that had no treatment was colonized by the algae one week after its placement. And the treated sample clearly delays colonization by the algae for 4 weeks. From this moment on, the development of algae 25 on the treated sample is increasing until it reaches the entire surface of the specimen at week 8.

     It is noteworthy that the untreated sample was completely colonized by the algae only two weeks after its placement in the port. 30

    The conclusion drawn after the first field test is that the product whose invention is claimed has a clear inhibitory effect on algae growth on concrete. After a period of time the surface is covered with a layer of biofilm
    formed by microbiological cells, active and non-active, and metabolites of microorganisms, this layer being a support that allows algae to be fixed and developed.

    Therefore, in order to preserve a fully protected surface against algae growth for a long period of time, the formation of the biofilm layer must be avoided by means of a preventive cleaning process.

    In the event that the concrete is treated with the product described in the present invention, the cleaning process may be much less frequent and less aggressive, 10 significantly reducing the maintenance of the structure and degradation by this process.

    It is noteworthy that the specimens did not lose the effectiveness of inhibition of biological growth. After completing the test, the specimens were removed and subjected to a microbiological test, to assess the durability of the biostatic effect of the product after the field test.

    Cultures with the species of algae Stichococcus bacillaris and Scenedesmus vaculatus were observed in parts of the test specimens tested. The treated sample 20 had a high growth inhibition activity of the algae evaluated, developing a halo of inhibition around the sample, even after remaining two months in real conditions of use.

    The second test of the field trials sought to study the effectiveness of 25 different forms of product application. Thus, two specimens were placed again in the aforementioned facilities, considering two types of treatments: a layer of cementitious grout surface coating and a cement-based paint, both with the addition of the product described in the present invention. 30

    It was observed that the mass treatment prevented the growth of algae on the surface of the specimens for more than 18 months.

    Describing sufficiently the nature of the present invention, as well as the way of putting it into practice, it is not considered necessary to make its explanation more extensive so that any person skilled in the art understands its scope and the advantages that derive from it, stating that, within its essentiality, it may be implemented in other embodiments that differ in detail from that indicated in title 5 of the example, and to which it will also achieve the protection that is sought provided that it is not altered, changed or modified its principle fundamental.
    权利要求:
    Claims (12)
    [1]

    1.- INHIBITOR ADDITIVE OF BIOLOGICAL GROWTH IN CONCRETE STRUCTURES, characterized in that it consists of a multicomponent solution comprising two components with antimicrobial active ingredients, a deaerating agent and a vehicular medium.

    [2]
    2. INHIBITOR ADDITIVE OF BIOLOGICAL GROWTH IN CONCRETE STRUCTURES, according to claim 1, characterized in that a first antimicrobial component of the solution is a bactericidal and fungicidal agent, and a second antimicrobial component is an algaecide and fungicidal agent.

    [3]
    3. INHIBITOR ADDITIVE OF BIOLOGICAL GROWTH IN CONCRETE STRUCTURES, according to claim 2, characterized in that the first bactericidal and fungicidal component is the family of polychlorophenoxyphenols. fifteen

    [4]
    4. INHIBITOR ADDITIVE OF BIOLOGICAL GROWTH IN CONCRETE STRUCTURES, according to claim 3, characterized in that the first bactericidal and fungicidal component of the polychlorophenoxyphenols family is in the solution in a proportion of between 20% and 40% over dry weight. twenty

    [5]
    5. ADDITIVE INHIBITOR OF BIOLOGICAL GROWTH IN CONCRETE STRUCTURES, according to claim 2, characterized in that the second algicidal and fungicidal component is from the isothiozolone family.
     25
    [6]
    6. INHIBITOR ADDITIVE OF BIOLOGICAL GROWTH IN CONCRETE STRUCTURES, according to claim 5, characterized in that the second algicidal and fungicidal component of the isothiozolone family is in the solution in a proportion of between 15% and 20% Over dry weight
      30
    [7]
    7. ADDITIVE INHIBITOR OF BIOLOGICAL GROWTH IN CONCRETE STRUCTURES, according to any of claims 1-6, characterized in that the deaerating agent is an ionic deaerating agent.

    [8]
    8. ADDITIVE INHIBITOR OF BIOLOGICAL GROWTH IN CONCRETE STRUCTURES, according to claim 7, characterized in that the ionic deaerating agent is in the solution in a proportion of between 5% and 10% on dry weight.
     5
    [9]
    9.- INHIBITOR ADDITIVE OF BIOLOGICAL GROWTH IN CONCRETE STRUCTURES, according to any of claims 1-8, characterized in that the vehicular medium of the additive is limestone filler.

    [10]
    10. ADDITIVE INHIBITOR OF BIOLOGICAL GROWTH IN 10 CONCRETE STRUCTURES, according to claim 9, characterized in that the limestone filler is in the solution in a proportion of between 36% and 76% on dry weight.

    [11]
    11. USE OF A BIOLOGICAL GROWTH INHIBITOR ADDITIVE IN 15 CONCRETE STRUCTURES, as described in any of claims 1-10, characterized in that it is applicable as a mass additive of the concrete and / or mortar construction material, as an additive for a layer of cementitious grout surface coating or as an additive for a cement-based paint. twenty

    [12]
    12. USE OF A BIOLOGICAL GROWTH INHIBITOR ADDITIVE IN CONCRETE STRUCTURES, according to claim 11, characterized in that the application dose comprises between 0.1 and 0.5% by weight of dry material.
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1428806A1|2002-12-10|2004-06-16|Cemex Trademarks Worldwide Ltd.|Concrete-based floors and wall coverings with an antimicrobial effect|
    US20060035097A1|2004-08-12|2006-02-16|Batdorf Vernon H|Antimicrobial coating composition and treated building construction materials therewith|
    US20070027224A1|2005-03-22|2007-02-01|Cowan David A|Lightweight concrete compositions containing antimicrobial agents|
    CN103740207A|2013-12-31|2014-04-23|广东自然涂化工有限公司|High-performance low-gloss exterior wall texture coating and preparation method thereof|
    GB9813207D0|1998-06-18|1998-08-19|Biotal Ind Products Limited|Waste bin|
    ES2423321T3|2003-11-17|2013-09-19|Microban Products Company|Procedure for the preparation of cement slab products that have antimicrobial properties|
    CA2644417A1|2006-03-22|2007-10-04|Nova Chemicals Inc.|Lightweight concrete compositions containing antimicrobial agents|
    KR20090056309A|2007-11-30|2009-06-03|주식회사 경동세라텍|Fire proof coating material, insulation material and mortar using liquid antimicrobial and its coating method|
    EP2724998A1|2012-10-24|2014-04-30|Clariant S.A.|Method for avoiding fungal growth in mineral construction materials|
    DE202013002158U1|2013-03-07|2013-07-01|Sto Ag|Cementary coating composition|ES2695450A1|2017-06-29|2019-01-04|Ros Francesc Servos|Cement with antimicrobial properties |
    ES2760723A1|2018-11-14|2020-05-14|Ros Francesc Servos|LIQUID OR SOLID PREPARATION FOR COMBINED USE: SURFACE IMPREGNATION - MASS ADDITIVE - MILLING ADDITIVE WITH ANTIMICROBIAL EFFECT |
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201431036A|ES2556167B2|2014-07-10|2014-07-10|Biological growth inhibitor additive in concrete structures and use|ES201431036A| ES2556167B2|2014-07-10|2014-07-10|Biological growth inhibitor additive in concrete structures and use|
    EP15818637.9A| EP3167715A4|2014-07-10|2015-07-09|Additive for inhibiting biological growth in concrete structures and use thereof|
    PCT/ES2015/070534| WO2016005641A1|2014-07-10|2015-07-09|Additive for inhibiting biological growth in concrete structures and use thereof|
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