• 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:
    In a method for producing a building material, in particular mortar or concrete of an alkali-activated hydraulic binder, to which at least one dispersant and at least one debonding agent are added to the mixture, at least the dispersant is added after mixing the binder with water.
    公开号:AT511958A4
    申请号:T1414/2011
    申请日:2011-09-29
    公开日:2013-04-15
    发明作者:Suz-Chung Ko；Moussa Baalbaki
    申请人:Holcim Technology Ltd；
    IPC主号:
    专利说明:

    * * »« * »» · Φ · φ «* * * ♦» fit I <1 I «· * φ φ t t ♦» * * Φ # M &lt;
    The present invention relates to a process for producing a building material, in particular mortar or concrete from an alkali-activated hydraulic binder, in which at least one dispersant and at least one debonding agent are added to the mixture.
    Alkali activated aluminosilicate binders (AAAS) are cementitious materials obtained by reacting fine silica and alumina solids with an alkali metal or aluminum oxide
    Alkali salt solution for the preparation of gels and crystalline compounds are formed. During alkali activation, a high concentration of OH ions in the mixture acts on the aluminosilicates. While in Portland cement paste, due to the solubility of calcium hydroxide, a pH greater than 12 is produced, the pH in the AAAS system is even above 13.5. The amount of alkali, which is generally 2 to 25% by weight alkali 20 (> 3% by weight Νβ2θ), depends on the alkalinity of the
    Aluminosilicates from.
    The reactivity of an AAAS binder depends on its chemical and mineral composition, degree of vitrification and grinding fineness. In general, AAAS binders can begin setting within 15 minutes and provide rapid cure and high strength growth over the long term. The setting reaction and the curing process are still not clear.
    For the production of high-strength and durable building materials, it is necessary to adhere to a relatively low water / binder ratio when mixing the building material, which results in particularly dense and therefore solid crystal structures when the alkali-activated binder is cured. However, a low water / binder ratio has the disadvantage that the building material has unfavorable theological properties. The flowability of the building material before setting is not sufficiently pronounced in such building materials, so that the casting or spraying of these materials is difficult or impossible.
    The addition of dispersants and
    Abbindesteuerungsmitteln to hydraulic binders has long been known and there are various approaches by the addition of these agents the processability determining theological properties, the duration of processability and the setting behavior with respect to the achieved strength values of the building materials produced with the respective binders, usually concrete or Mortar to influence according to different claims.
    Abbindesteuerungsmittel cause a delay in the setting of the cement, thus allowing an extension of the workability of concrete.
    Dispersants, also called concrete plasticizers, superplasticizers, plasticizers or superplasticizers, are used to improve the processability in terms of flowability. These additives are long-chain organic molecules that surround the cement particles, thus causing either electrostatic repulsion under the particles or steric stabilization of the particles, thereby increasing the fluidity of the building material. However, at the pH levels prevalent in alkalactivated hydraulic binders, most of the known dispersants are not stable, so that conventional addition does not produce the desired results and, moreover, a decrease in final strength values is often observed.
    The invention is therefore based on the object to improve a method of the type mentioned in that even when using alkali-activated hydraulic binders improved processability and flowability can be achieved without reducing the final strength beyond measure. The invention is intended to result in the processability and the desired strength values being given even at a low water / binder ratio of <0.5, in particular <0.45. To solve this problem, a method of the type mentioned is inventively further developed such that at least the dispersant is added after mixing the binder with water. This means that first the hydraulic binder is thoroughly mixed with water until a homogeneous mass is obtained, and only then is the dispersant added. Applicant has observed that the delayed addition of the dispersant of the present invention provides attractive flowability and sufficient strength values.
    It is essential to the invention that the addition of at least the dispersant takes place only after mixing.
    Preference is given to proceeding in such a way that the dispersant and optionally the ironing agent is added 2 to 60 minutes, in particular 3 to 10 minutes after mixing the binder with water, in particular after the addition of water, in particular after the end of Hasserzugabe.
    According to a preferred embodiment of the present invention, the process is further developed in that the dispersant and the ironing agent are added simultaneously. This means that the dispersant and the ironing agent are added at the same time, but in any case only after mixing the binder with water, preferably the dispersant and the setting control agent 2 to 5 minutes, in particular 3 minutes after mixing the binder with water, in particular after the addition of water, are added. In this way, particularly advantageous results were achieved, as will be explained below.
    According to a further advantageous embodiment of the present invention, it is provided to add the age control agent together with the water during mixing of the binder and to add the dispersant for 30 to 60 minutes, in particular 40 to 50 minutes, in particular 45 minutes after mixing the binder with water. Even with this procedure, satisfactory results could be achieved.
    Preferably, the at least one dispersing agent is selected from the group consisting of melamine
    Sulfonate polycondensates, polynaphthalene
    Sulfonate polycondensates and polycarboxylate ethers. These are known and commercially available dispersants which, in the described procedure, surprisingly provide the desired efficacy in terms of flowability, even with alkali activated binders. show the processability.
    In turn, the ironing agents are preferably selected from the group consisting of modified salts of lignosulphuric acids, in particular Na, Ca or NH 4 salts, salts of hydroxycarboxylic acids, in particular Na, Ca or triethanolamine salts of adipine, gluconic, tartaric, amber lemons - and heptonic acid, carbohydrates and polysaccharides and their derivatives selected.
    In the context of the experiments which led to the findings of the present invention, it has proved to be advantageous if the ironing agent and / or the dispersant in amounts of 0.025 to 1.5 wt .-%, in particular 0.25 to 1, 0 wt .-% based on the binder is added.
    To achieve the inventively desired early and final strengths and the durability is preferably such that the building material with a water / binder ratio of less than 0.5, in particular with a water / binder ratio of less than 0.45 is mixed ,
    In principle, the method according to the invention is applicable to all building materials based on alkali-activated binders. However, it is particularly preferred as hydraulic binder a binder consisting essentially of slag, in particular blast furnace slag, in amounts of ^ 20 wt .-%, different from blast furnace slag aluminum silicates, preferably fly ash and natural aluminum silicates, preferably basalt, clays , Marl, andesites or zeolites, in amounts of from 5% to 75% by weight and an alkali activator in an amount which defines a Na 2 O equivalent as (Na 2 O + 0.658 K 2 O) (ASTM C 150) between 0.7% by weight .-% and 4 wt .-% corresponds to use. Such a building material is disclosed, for example, in EP 1 735 252 B1 of the applicant.
    The invention will be explained in more detail with reference to exemplary and comparative examples. In all examples, the binder used is an alkali-activated hydraulic binder having the following composition:
    % By weight granulated blast furnace slag 90 Na2CQ3 5 Portland cement 5
    This binder was mixed with water each at a water / binder ratio (W / C) of 0.45.
    example 1
    Binder [weight%] 100 paint control agent [weight%] 0 dispersant [weight%] 0 addition time point paint control agent [min] *) addition time dispersant [min] *) - 7 • · * · «« «» + · Workability after 10 minutes 157 Workability after 45 minutes 124 Compressive strength after 1 day [MPa] 13.22 Compressive strength after 2....... Days [MPa] 22,28 Compressive strength after 28 days [MPa] "45720 ~~ *) Time after addition of water
    The processability was determined by the HolcimCone ™ Flow-5 method. In this method, a modified cone is used to measure the slump of fresh mortar samples, which correlates well with that of concrete. The cone in this method is half as high as the cone in the method according to ASTM C 143. 10
    Example 2
    Binder [weight%] 100 paint control agent [weight%] 0.75 dispersant [weight%] 0 addition time point paint control agent 3 [min] *} addition time dispersant [min] *) - W / C 0.45 processability after 10 min 187 Workability after 45 min 197 Compressive strength after 1 day [MPa] 9,9 Compressive strength after 2 days [MPa] 18,4 Compressive strength after 28 days [MPa] 41, 0 15
    Example 3
    Binder [wt.%] 100 Ironing agent [wt.%] 0 Dispersant [wt.%] 1.0 Addition Time Ironing agent ___ [min] *) Addition time Dispersant [min] *) 3 W / C 0.45 Workability after 10 min 212 Workability after 45 min 145 Compressive strength after 1 day [MPa] 12,7 Compressive strength after 2 days [MPa] 20, 6 Compressive strength after 28 days [MPa] 39, 6
    Example 4 5
    Binder [weight%] 100 Paint control agent [weight%] 0.75 Dispersant [weight%] 1.0 Addition time Ironing agent [min] *) 3 Addition time Dispersant [min] *) 3 W / C 0.45 Workability after 10 min 272 Workability after 45 min 255 Compressive strength after 1 day [MPa] 8, 1 Compressive strength after 2 days [MPa] 1 1 00 r Compressive strength after 28 days [MPa] 37.7 9
    Example 5
    Binder [weight%] 100 Paint control agent [weight%] 0, 75 Dispersant [weight%] 1.0 Addition time Ironing agent 0 [min] *) Addition time Dispersant [min] *) 0 W / C 0.45 Workability after 10 minutes 256 Workability after 45 minutes 263 Compressive strength after 1 day [MPa] 6, 5 Compressive strength after 2 days [MPa] 12,7 Compressive strength after 28 days [MPa] 32,3
    Example 6 5
    Binder [weight%] 100 Paint control agent [weight%] 0.75 Dispersant [weight%] 1.0 Addition time Ironing agent 0 [min] *) Addition time Dispersant [min] *) 45 W / C 0.45 Workability after 10 minutes 199 Workability after 45 minutes 257 Compressive strength after 1 day [MPa] 8,0 Compressive strength after 2 days [MPa] 15,3 Compressive strength after 28 days [MPa] 35,8 10
    Example 7
    Binder [weight%] 100 Paint control agent [weight%] 0.75 Dispersant [weight I] 1.0 Addition time Ironing agent [min] *) 45 Addition time Dispersant [min] *) 0 W / C 0.45 Workability after 10 min 191 Workability after 45 min 248 Compressive strength after 1 day [MPa] 3.3 Compressive strength after 2 days [MPa] 17, 7 Compressive strength after 28 days [MPa] 45.7
    In all examples, the percentages by weight are based on the binder.
    In all examples, sodium lignosulfonate was used as the age control agent and polycarboxylate ether as the dispersant. However, you can see comparable results with other paint control agents and dispersants.
    The examples given above were carried out to determine the conditions under which workability after 45 min. greater than 250 mm, a compressive strength after 1 day {early strength) greater than 8 MPa and a compressive strength after 28 days (final strength) greater than 35 MPa can be achieved.
    The examples show that the desired processability can not be achieved if neither a dispersant »ft ft * ft * ft ft * ft *
    nor a delustering agent (Example 1), only a Abbindesteuerungsmittel (Example 2) or only a dispersant (Example 3) is used. The desired processability can only be achieved if both a dispersant and a
    Abbindesteuerungsmittel be used (Examples 4 to 7). However, in this case, the timing of addition of the dispersant and the binder control agent must be carefully selected to obtain sufficient strengths. Thus, Example 5 demonstrates that the addition of the dispersant and the debonding agent together with the water results in strength values well below the target. With the delayed addition of the invention
    On the other hand, satisfactory strength values can be obtained (Example 4). If the ironing agent is added in a conventional manner together with the water, it is advantageous to add the dispersant as late as possible, for example directly at the installation site, in order to reach the targets for the strength values (see Example 6 according to the invention). Again, Example 7 shows that with a conventional addition of the dispersant together with the water, processability can be improved by adding the setting control agent, but the early strength values are not satisfactory even with greatly delayed addition of the setting control agent.
    It can thus be shown that only the inventive addition methods according to Examples 4 and 6 are suitable for meeting the requirements for processability and strength.
    权利要求:
    Claims (10)
    [1]


    • »* ♦ * 1 V» - &gt; 1. A process for the preparation of a building material, in particular mortar or concrete from a 5 alkali-activated hydraulic binder in which the mixture at least one dispersant and at least one Abbindesteuerungsmittel be added, characterized in that at least the dispersant after mixing the binder with water becomes. 10
    [2]
    2. The method according to claim 1, characterized in that the dispersant and optionally the Abbindesteuerung 2 to 60 minutes, especially 3 to 10 minutes after mixing the binder with 15 water, in particular after the addition of water, in particular after the end of the addition of water added becomes.
    [3]
    3. The method according to claim 1 or 2, characterized in that the dispersant and the 20 Abbindesteuerungsmittel · are added simultaneously.
    [4]
    4. The method according to claim 3, characterized in that the dispersant and the Abbindesteuerung be added 2 to 5 minutes, in particular 3 minutes after mixing the binder with water.
    [5]
    5. The method according to claim 1 or 2, characterized in that the Abbindesturning agent is added together with the water during mixing of the binder 30 and the dispersant 30 to 60 minutes, especially 40 to 50 minutes, in particular 45 minutes after mixing the binder with water is added. 13 * ft #
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that the at least one dispersant is selected from the group consisting of melamine sulfonate polycondensates, polynaphthalene sulfonate polycondensates and polycarboxylate ethers.
    [7]
    7. The method according to any one of claims 1 to 6, characterized in that the ironing agent is selected from the group consisting of modified salts of lignosulfate, in particular Na, Ca or NH4 salts, salts of hydroxycarboxylic acids, in particular Na, Ca or triethanolamine salts of adipic, gluconic, tartaric, succinic, citric and heptonic acids, carbohydrates and polysaccharides and their derivatives.
    [8]
    8. The method according to any one of claims 1 to 7, characterized in that the setting control agent and / or the dispersant in amounts of 0.025 to 1.5 wt .-%, in particular 0.25 to 1.5 wt .-% based on the Binder is added.
    [9]
    9. The method according to any one of claims 1 to 8, characterized in that the building material with a water / binder ratio of less than 0.5, in particular with a water / binder ratio of less than 0.45 is mixed.
    [10]
    10. The method according to any one of claims i to 9, characterized in that as a hydraulic binder, a binder consisting essentially of slag, in particular blast furnace slag, in amounts of ä 20 wt .-%, of blast furnace slag different aluminum silicates, 9f ** * * * , «« «« * »14 τ :: * ·; Preferably, fly ash and natural aluminosilicates, preferably basalt, clays, marls, andesites or zeolites, in amounts of from 5% to 75% by weight and an alkali activator in an amount which a Na 2 O 5 equivalent defined as (Na 2 O + 0.658 K 2 O) (ASTM C 150) of between 0.7% and 4% by weight. Notified by: Vienna, 29 September 2011 10

    15
    类似技术:
    公开号 | 公开日 | 专利标题
    WO2005075381A1|2005-08-18|Water-based coagulating and hardening accelerator for hydraulic binders and method for the production thereof
    EP0211362B1|1990-08-29|Mixture for producing quickly hardening mortars for stuccoes and repairs
    EP2746237A1|2014-06-25|Activator for cement
    EP2913316A1|2015-09-02|Ternary binding agent system based on calcium aluminates
    DE1646716B1|1972-04-27|Setting retardant additive for mortar and concrete compounds
    DE2522537B2|1978-07-06|
    EP2729430B1|2020-08-12|Hydraulic binder
    EP3070065A1|2016-09-21|Retarder mixture for alkali activated binder
    EP0228595A2|1987-07-15|Rapid hardening binder composition
    EP2066595B1|2014-11-19|Binder comprising portland cement and lime hydrate
    EP0211365B1|1990-11-07|Fast setting cement
    EP1004555B1|2001-12-05|Fast setting hydraulic binder composition
    AT511958B1|2013-04-15|METHOD FOR PRODUCING A BUILDING MATERIAL
    EP2080742B1|2014-11-05|Sulphate foundry cement
    EP1894905B1|2009-07-22|Concrete composition
    DE19936093C2|2002-03-14|Method for controlling the early strength and for controlling the early strength development of a binder mixture free of sulfate carrier
    DE19633447A1|1997-02-27|Quick-hardening hydraulic binder
    EP2744770B1|2018-01-10|Enzymatically inverted saccharose as dispersing agent
    DE102016001761A1|2017-08-17|Formulation of a faster-setting concrete mix and method of use
    DE102016114340B3|2017-05-24|Process for the preparation of a solidification accelerator for hydraulic binders
    DE60005589T2|2004-08-05|Mineral binder additive based on a product of internal dehydration of hydrogenated sugar, mineral binder containing this additive and manufacturing process
    EP2159202A1|2010-03-03|Adhesive, compound comprising a slag and an additive and a method for creating a building material
    DE19754826A1|1998-06-18|Low shrinkage cementitious hydraulic binder
    DE2122710A1|1971-11-25|Calcined aluminium sulphate - as cement additive
    EP0585790B1|1996-12-11|Swellable plastic composition
    同族专利:
    公开号 | 公开日
    US20140238276A1|2014-08-28|
    HUE025282T2|2016-02-29|
    AU2012314006B2|2016-02-25|
    MX2014003895A|2014-07-14|
    CA2848639C|2019-07-23|
    BR112014007070A2|2017-03-28|
    AU2012314006A1|2014-03-13|
    ES2545371T3|2015-09-10|
    EP2760805B1|2015-06-03|
    EP2760805A1|2014-08-06|
    UA110263C2|2015-12-10|
    AR088174A1|2014-05-14|
    CA2848639A1|2013-04-04|
    AT511958B1|2013-04-15|
    WO2013046000A1|2013-04-04|
    MX337299B|2016-02-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0290394A1|1987-05-05|1988-11-09|Sandoz Ag|Improved hyraulic cement|
    EP0465991A1|1990-07-09|1992-01-15|Sika AG, vorm. Kaspar Winkler &amp; Co.|Mortar and concrete to be processed by wet spraying and method of production of mortar and concrete|
    JP2003119464A|2001-10-16|2003-04-23|Denki Kagaku Kogyo Kk|Slug-based grouting material|
    US4482379A|1983-10-03|1984-11-13|Hughes Tool Company|Cold set cement composition and method|
    CH686780A5|1992-07-22|1996-06-28|Sandoz Ag|Fliessfaehige cement mixtures.|
    AT413535B|2004-04-05|2006-03-15|Holcim Ltd|HYDRAULIC BINDER AND METHOD FOR THE PRODUCTION THEREOF|
    AU2007200392A1|2006-03-22|2007-10-11|Council Of Scientific & Industrial Research|A Process for the Preparation of Self-Glazed Geopolymer Tile from Fly Ash and Blast Furnace Slag|
    CN102325736A|2009-01-09|2012-01-18|斯蒂芬·阿尔特|The Geopolymer compsn|MX2017014485A|2015-05-26|2018-03-21|Cemex Res Group Ag|Method to artificially agglomerate finely divided materials.|
    CN109608088A|2019-01-12|2019-04-12|沈继锋|A kind of compound concrete alkali-activator and preparation method thereof|
    法律状态:
    2017-05-15| MM01| Lapse because of not paying annual fees|Effective date: 20160929 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA1414/2011A|AT511958B1|2011-09-29|2011-09-29|METHOD FOR PRODUCING A BUILDING MATERIAL|ATA1414/2011A| AT511958B1|2011-09-29|2011-09-29|METHOD FOR PRODUCING A BUILDING MATERIAL|
    CA2848639A| CA2848639C|2011-09-29|2012-09-27|Method for the production of a building material|
    UAA201403466A| UA110263C2|2011-09-29|2012-09-27|Method tor the production of a building material|
    ES12784059.3T| ES2545371T3|2011-09-29|2012-09-27|Procedure for the production of a building material|
    MX2014003895A| MX337299B|2011-09-29|2012-09-27|Method for the production of a building material.|
    EP12784059.3A| EP2760805B1|2011-09-29|2012-09-27|Method for the production of a building material|
    AU2012314006A| AU2012314006B2|2011-09-29|2012-09-27|Method for the production of a building material|
    ARP120103604A| AR088174A1|2011-09-29|2012-09-27|PROCEDURE TO PRODUCE A CONSTRUCTION MATERIAL|
    US14/347,725| US20140238276A1|2011-09-29|2012-09-27|Method for the production of a building material|
    HUE12784059A| HUE025282T2|2011-09-29|2012-09-27|Method for the production of a building material|
    PCT/IB2012/001901| WO2013046000A1|2011-09-29|2012-09-27|Method for the production of a building material|
    BR112014007070A| BR112014007070A2|2011-09-29|2012-09-27|method for producing a building material|
    [返回顶部]