EP1644299A1 - Agent epaississant destine a l'epaississement d'un produit de beton, produit beton et son procede de production - Google Patents

Agent epaississant destine a l'epaississement d'un produit de beton, produit beton et son procede de production

Info

Publication number
EP1644299A1
EP1644299A1 EP04738550A EP04738550A EP1644299A1 EP 1644299 A1 EP1644299 A1 EP 1644299A1 EP 04738550 A EP04738550 A EP 04738550A EP 04738550 A EP04738550 A EP 04738550A EP 1644299 A1 EP1644299 A1 EP 1644299A1
Authority
EP
European Patent Office
Prior art keywords
concrete
thickener
weight
water
approximately
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04738550A
Other languages
German (de)
English (en)
Inventor
Fritz Töllner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Remei & Co KG GmbH
Original Assignee
Remei & Co KG GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Remei & Co KG GmbH filed Critical Remei & Co KG GmbH
Publication of EP1644299A1 publication Critical patent/EP1644299A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/44—Thickening, gelling or viscosity increasing agents

Definitions

  • the present invention relates to a concrete thickener for thickening a concrete product, this concrete product and a method for producing a concrete product.
  • Concrete products are mainly produced in two layers (core concrete and facing layer).
  • core concrete and facing layer At the facing layer i. d.
  • special requirements e.g. coloring, mechanical stress, chemical exposure, weather influences, resistance to frost and de-icing salt, etc.
  • concrete paving stones must have an average compressive strength of 60 N / mm, no tested individual value may be less than 50 N / mm 2 .
  • Concrete paving stones according to DIN 18 501 are generally considered to be resistant to frost and de-icing salt attack if they meet the requirements of the standard, whereby the aggregates used must be sufficiently resistant to the effects of frost.
  • Efflorescence of lime is material-related in cement-bound products. The reason for this is that all standard cements contain lime. Cement without lime is unthinkable, and there is no usable concrete in which the lime content is so low that lime precipitation would be impossible from the outset. Whether and to what extent efflorescence occurs also depends on the weather. Chemically, the deposits are hydrated lime hydrate, which after evaporation of the water and reaction with the carbon dioxide in the air accumulates as calcium carbonate on the concrete surface.
  • Efflorescence is often heavily required due to external water (rain / condensation). Depending on the density of the concrete structure and the rate of evaporation, calcium carbonate can be visible on the surface, but also invisible within the structure in the pore space. The degree of efflorescence depends in particular on the water-cement value, which is explained in more detail below.
  • Concrete is made from cement, water and aggregates. Concrete additives can also be added to influence certain concrete properties. Fresh concrete, i.e. Concrete that can still be processed is given a desired shape, which it retains in the hardened state, as an artificial stone.
  • the aggregates can include natural aggregates, not broken or broken, such as sand, gravel, crushed sand, grit and crushed stone, and industrially manufactured aggregates, such as blast furnace sand and blast furnace slag, and mixtures thereof.
  • the cement used for the concrete is a hydraulic binder. It is mixed with water and hardened by hydration both in the air and under water. The resulting cement stone is water-resistant. If you mix water and cement, cement glue is created first. This process takes place when the concrete is mixed. The cement paste envelops the aggregates, fills the voids between them and makes the fresh concrete workable. By hardening the cement paste, cement stone is then created that cemented the aggregates together.
  • W / Z value water-cement value
  • the optimal W / Z value influences, for example, the strength, the tendency to bloom, the resistance to freeze-thaw salt, etc. of the hardened concrete.
  • a relatively small amount of water is required to harden the concrete (complete hydration). It is generally known from concrete technology that a W / Z value of 0.40 can be regarded as optimal. In this context it should be mentioned that the cement can only bind an amount of water of about 40% of its mass (about 25% chemically and 15% physically). However, a W / Z value of 0.40 can also be disadvantageous, since on the one hand a consistency of the cement paste is obtained which makes the concrete mixture difficult to process, for example with this W / Z value a production in a tel-pressing process is not possible, and on the other hand the concrete products made from such a concrete mix become form-unstable, bulge, are not stable and stick to the molded parts.
  • the concrete back concrete or core concrete
  • the facing concrete is then applied to this concrete and the entire mixture is hydraulically finally compacted (baling pressure) and discharged (so-called two-layer structure).
  • baling pressure baling pressure
  • two-layer structure In the case of single-layer production, only facing concrete is used.
  • the advantages of a vibratory press process are fast and homogeneous compaction, a low water cement value and thus a high strength of the concrete products, short cycle times and immediate demolding, diverse shaping options, efficient production of the desired number of pieces and fully automated production.
  • the first object is achieved in that the concrete product contains a concrete thickener which comprises the following components:
  • the thickener is preferably an organic or inorganic polymer.
  • the thickener is selected from the group consisting of polyacrylates, polymethacrylates, polyurethanes, alginates, polyoses, cellulose derivatives, polycarboxylic acids, polyethers, polyimines, polyamides, silicic acid derivatives, zeolites and / or combinations thereof, polyacrylates , Polyurethanes, cellulose derivatives and silicic acid derivatives are preferred.
  • the concrete thickener is present in the concrete product in a proportion of approximately 0.01 to approximately 2.0% by weight, preferably approximately 0.04 to approximately 1.0% by weight.
  • the hydrophobizing additive is selected from the group consisting of silanes, siloxanes, silicon cones, siliconates, fluorosilicates, hydrosilanes, fatty acids and their salts, waxes, acrylic resins, epoxy resins, polyurethanes, water glasses (alkali silicates), silicic acid esters and / or combinations thereof ,
  • the concrete thickener comprise dyes, water-soluble polymers, polymer dispersions, surface-active substances or mixtures thereof.
  • the concrete goods contain further concrete additives, such as concrete additives and / or concrete additives.
  • the concrete additives are selected from the group consisting of concrete plasticizers, flow agents, air entraining agents, sealants, retarders, accelerators, press-in aids, stabilizers, chromate reducers, recycling aids for washing water and / or combinations thereof, and the concrete additives are selected from the Group consisting of trass, rock flour, hard coal fly ash, silica dust, pigments and or combinations thereof.
  • the concrete product is preferably characterized by a water-cement value of approximately 0.3 to approximately 0.5, preferably approximately 0.4.
  • Concrete goods are advantageously provided which are produced in a vibratory pressing process.
  • Another object of the invention is achieved by a method for producing a concrete product, which comprises the following steps:
  • the concrete thickener comprising the following components:
  • the concrete thickener is metered into the mixer via an emptying pump and a spray nozzle.
  • a concrete thickener is also proposed, in particular for thickening a concrete product, which comprises the following components:
  • the thickener is preferably an organic or inorganic polymer.
  • the thickener is selected from the group consisting of polyacrylates, polymethacrylates, polyurethanes, alginates, polyoses, cellulose derivatives, polycarboxylic acids, polyethers, polyimines, polyamides, silicic acid derivatives, zeolites and / or combinations thereof.
  • the invention is based on the surprising finding that an additional amount of water can be offered to a generic concrete product by adding a concrete thickener according to the invention and the setting behavior of the concrete is significantly improved without the resulting consistency of the concrete determining the workability and usability of the concrete Manufacturing process restricted.
  • the concrete products according to the invention are dimensionally stable, do not bulge, are stable and do not stick to the molded parts, and thus in particular enable fresh removal of the formwork from the concrete.
  • the large amount of water which is present in the concrete mixture at a high water-cement value such as a W / Z value of approximately 0.40, is initially stored by the concrete thickener and gradually for hydration of the cement.
  • a high water-cement value such as a W / Z value of approximately 0.40
  • Another important property of the concrete thickener according to the invention is its hydrophobic setting by means of an existing hydrophobic additive.
  • This water repellent additive ensures that water is repelled from outside the concrete mix and that the hydration process for setting the concrete is not negatively influenced, namely by a possible shift in the hydration balance.
  • the blooming tendency of the resulting hardened concrete is greatly reduced.
  • the concrete strength is increased, since an increased addition of water is possible.
  • the concrete product according to the invention shows an excellent compaction willingness without sticking, as well as a high green stability.
  • the water penetration capacity is reduced and a high resistance to frost and de-icing salt is achieved.
  • direct metering of the concrete thickener directly onto the aggregates as is common in the admixture area, is not possible here.
  • An optimal effect of the concrete thickener is preferably achieved if it is dosed onto the already finished mixture of the concrete goods.
  • the dosing is preferably carried out using a dosing scale (type BPB, Beton- und Anlagentechnik Blomberg GmbH & Co. KG, 32825 Blomberg) via a drain pump and a spray nozzle into a mixer containing the concrete mixture.
  • the post-mixing time with the concrete thickener can be about 30 seconds.
  • the concrete mixture which is actually too moist, is converted into a consistency level that can be processed using the KS process, ie into a stiff, "earth-moist" consistency with a low water cement value.
  • a typical recipe for a concrete product according to the invention is as follows:
  • the concrete thickener has a composition of about 30% by weight of thickener, about 30% by weight of hydrophobic additive and the rest water.
  • the constituents mentioned are first mixed in a mixer. After corresponding Mixing is metered into the concrete thickener, preferably via a spray nozzle, and a workable consistency is achieved by further mixing.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

L'invention concerne un produit de béton contenant un agent épaississant de béton de la composition suivante: a) environ 20 à 40 % en poids, de préférence, environ 30 % en poids d'un agent épaississant; b) environ 20 à 40 % en poids, de préférence, environ 30 % en poids d'un additif hydrophobe ; et c) le reste étant de l'eau. L'invention concerne un procédé de production d'un produit de béton selon l'invention et un épaississant de béton destiné au durcissement d'un produit de béton.
EP04738550A 2003-07-14 2004-05-25 Agent epaississant destine a l'epaississement d'un produit de beton, produit beton et son procede de production Withdrawn EP1644299A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10331758A DE10331758B4 (de) 2003-07-14 2003-07-14 Verfahren zu deren Herstellung einer nicht abgebundenen Betonmischung und Verwendung eines Gemisches als Betonverdicker
PCT/DE2004/001081 WO2005007594A1 (fr) 2003-07-14 2004-05-25 Agent epaississant destine a l'epaississement d'un produit de beton, produit beton et son procede de production

Publications (1)

Publication Number Publication Date
EP1644299A1 true EP1644299A1 (fr) 2006-04-12

Family

ID=34041833

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04738550A Withdrawn EP1644299A1 (fr) 2003-07-14 2004-05-25 Agent epaississant destine a l'epaississement d'un produit de beton, produit beton et son procede de production

Country Status (5)

Country Link
US (1) US20050011416A1 (fr)
EP (1) EP1644299A1 (fr)
CA (1) CA2529722A1 (fr)
DE (1) DE10331758B4 (fr)
WO (1) WO2005007594A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1036721C2 (nl) * 2009-03-17 2010-09-20 Jakob Gerrit Hendrik Pannekoek Inrichting voor de productie van wegbermbekleding.
US9914668B2 (en) * 2010-01-29 2018-03-13 Advanced Concrete Technologies Llc Compositions and methods for curing concrete
WO2018087221A1 (fr) 2016-11-10 2018-05-17 Windmolders Beton N.V. Procédé et dispositif de fabrication d'une pierre à pavé
WO2018202831A1 (fr) 2017-05-04 2018-11-08 Windmolders Beton N. V. Procédé et dispositif de fabrication d'une pierre à pavé
DE102019124726A1 (de) * 2019-09-13 2021-03-18 METTEN Consulting GmbH Betonelement und Verfahren zu seiner Herstellung
CN110590226B (zh) * 2019-10-17 2020-11-03 霍邱县明楼琉璃瓦有限公司 一种用于新型砌块墙体的水泥砂浆添加剂的制备方法
CN111960740B (zh) * 2020-08-12 2022-03-25 宁波新力建材科技有限公司 水下自密实混凝土及其制备方法
CN113045242B (zh) * 2021-03-26 2022-08-19 邢台路桥建设集团有限公司 一种复合改性水泥胶黏剂及其制备方法和应用

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07157355A (ja) * 1993-12-08 1995-06-20 Nippon Steel Chem Co Ltd 不定型外装材
KR960012718B1 (ko) * 1994-04-23 1996-09-24 쌍용양회공업 주식회사 방수용 시멘트 조성물과 방수용 시멘트의 제조방법
GB9611776D0 (en) * 1996-06-06 1996-08-07 Dow Corning Cementitious materials
US5921319A (en) * 1997-10-10 1999-07-13 Halliburton Energy Services, Inc. Methods of terminating water flow in a subterranean formation
DE19752659A1 (de) * 1997-11-27 1999-06-24 Wacker Chemie Gmbh Organosiliciumverbindungenhaltige hydrophobierende Pulver enthaltende Baustoffmassen
DE19757586C2 (de) * 1997-12-23 2003-05-22 Pci Augsburg Gmbh Hydraulisch härtende Zusammensetzung mit reduziertem Schwund, deren Verwendung und Verfahren zur Herstellung hydraulisch gehärteter Produkte
EP1132354A1 (fr) * 2000-03-09 2001-09-12 Sofitech N.V. Additifs multifonctionnels pour boues de ciment
DE20117304U1 (de) * 2001-10-25 2002-04-11 Hiendl, Heribert, 94315 Straubing Mittel zur Behandlung von Beton und Mauerwerk

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005007594A1 *

Also Published As

Publication number Publication date
US20050011416A1 (en) 2005-01-20
DE10331758B4 (de) 2005-06-30
WO2005007594A1 (fr) 2005-01-27
DE10331758A1 (de) 2005-02-17
CA2529722A1 (fr) 2005-01-27

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