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WO2008017240A1 - Sol protecteur de béton - Google Patents

Sol protecteur de béton Download PDF

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Publication number
WO2008017240A1
WO2008017240A1 PCT/CN2007/002274 CN2007002274W WO2008017240A1 WO 2008017240 A1 WO2008017240 A1 WO 2008017240A1 CN 2007002274 W CN2007002274 W CN 2007002274W WO 2008017240 A1 WO2008017240 A1 WO 2008017240A1
Authority
WO
WIPO (PCT)
Prior art keywords
concrete
sol
gel
water
silicate
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.)
Ceased
Application number
PCT/CN2007/002274
Other languages
English (en)
Chinese (zh)
Inventor
Hang Yin
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.)
ZHU XIANGXIANG
Original Assignee
ZHU XIANGXIANG
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 ZHU XIANGXIANG filed Critical ZHU XIANGXIANG
Priority to JP2009522072A priority Critical patent/JP5406026B2/ja
Publication of WO2008017240A1 publication Critical patent/WO2008017240A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5076—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic cements
    • C04B41/5089—Silica sols, alkyl, ammonium or alkali metal silicate cements
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
    • C04B41/61—Coating or impregnation
    • C04B41/65—Coating or impregnation with inorganic materials
    • C04B41/68—Silicic acid; Silicates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates

Definitions

  • the invention relates to a concrete protective material, belonging to an outer coating type, and in particular to a sol type concrete protective material.
  • osmotic materials such as: Sodium silicate-based materials
  • it is designed to protect concrete structures by coating or injecting sodium silicate as the main component in waterproof and maintenance areas.
  • the material has a problem that the reaction is fast in the concrete due to the main body being sodium monosilicate, the permeability is poor, and the surface film is easily worn and damaged.
  • aqueous alkali metal silicate solution improved according to the above problems such as: Chinese invention patent disclosure: using a combination of any two of sodium alkali metal silicate silicon, potassium silicate, lithium silicate, according to a molar ratio
  • 1 1 is mixed with water to form an aqueous alkali metal silicate solution (hereinafter referred to as a mixed aqueous solution), and sodium hydroxide is added, and the gelation rate of the mixed aqueous solution in the concrete is adjusted by adjusting the amount of sodium hydroxide added.
  • a mixed aqueous solution aqueous alkali metal silicate solution
  • sodium hydroxide sodium hydroxide
  • the gelation rate of the mixed aqueous solution in the concrete is adjusted by adjusting the amount of sodium hydroxide added.
  • the gel formed is unstable.
  • the gel formed by the reaction of the mixed aqueous solution in the concrete will return to the state of the aqueous solution when it is again exposed to water, and the gel will undergo a gel-aqueous solution-gel change under the action of water, which is reversible. Therefore, the gel formed by the reaction of the mixed aqueous solution in the concrete is unstable, that is, the protective effect is not reliable, which is used. It is extremely unfavorable to explain the protection of concrete structures in natural environments.
  • the gel produced by the reaction of the mixed aqueous solution in the pores of the concrete has poor mechanical properties.
  • the gel formed by the reaction of the mixed aqueous solution in the pores of the concrete is directly reacted from the solution state of the solid-free structure, and the gel lacks the support of the solid skeleton structure, resulting in poor mechanical properties of the gel itself, resulting in a gel layer.
  • the low osmotic pressure ratio and the ability to resist deformation of concrete are not conducive to the protection of concrete structures.
  • the pore structure of the gel layer is poor.
  • the pore structure of the gel layer is poor, the pore size is large, and the dispersion of the pores is small, resulting in a small specific surface area of the gel layer and a small surface adsorption energy, resulting in a gel layer to the gaseous state.
  • the adsorption capacity of water and corrosive media is deteriorated, and the gel layer has low protection ability for concrete.
  • the protection of the concrete by the mixed aqueous solution can only protect the concrete by gel-fixing the Ca 2+ ion of Ca(OH) 2 which is one of the easily corroded components in the concrete.
  • Ca(OH) 2 is only a component of concrete that is easily eroded, and many components in concrete are also susceptible to corrosion by corrosive media.
  • CSH 3CaO-2Si0 2 -3H 2 0
  • C0 2 is a carbonizable substance, which is easily corroded by C0 2 and is produced in concrete. Sexual destruction and so on.
  • the mixed aqueous solution Since the mixed aqueous solution has no protective effect on other components of the concrete which are also susceptible to corrosion by the corrosive medium, the corrosive medium can also erode other unprotected erosive components in the concrete and corrode the concrete. Therefore, the mixed aqueous solution is not comprehensive in terms of comprehensively improving the erosion resistance of the concrete structure against the corrosive medium.
  • the gel layer itself has no freeze-thaw resistance.
  • the mixed aqueous solution achieves the purpose of resisting freeze-thaw damage by keeping the interior of the concrete relatively dry.
  • the porosity of the gel layer itself has capillary water absorption, at the freezing point, the gel after the water absorption itself is frozen, and the gel layer of the concrete is freeze-thawed, and the protection effect on the concrete is lost. Therefore, the mixed aqueous solution can only prevent the freeze-thaw damage generated inside the concrete, and cannot prevent the freeze-thaw damage generated by the concrete gel layer itself.
  • the freeze-thaw damage of concrete generally occurs from the inside and the outside, so the anti-freeze-thaw performance of the mixed aqueous solution is poor.
  • the object of the present invention is to solve the above problems of the mixed aqueous solution in the protection of the concrete structure, and to design a concrete protective sol for the purpose of more comprehensive and effective protection of the concrete and improvement of the durability of the concrete structure.
  • the concrete protective sol of the present invention is mainly composed of sodium silicate and potassium silicate water, characterized in that the sodium silicate and potassium silicate are ultrafine solid particles having a diameter of from 1 to 100 nm, sodium silicate and potassium silicate.
  • the ratio is 3. 2 ⁇ 4. 2 : 1
  • the weight ratio of the total amount of ultrafine solid particles in the sol to the total amount of water is 26 to 30%: 74 to 70%.
  • the composition ratios of sodium silicate and potassium silicate are as follows:
  • Solubility 350g/100g (20 °C)
  • Boiling point 100°C
  • the concrete protective sol of the present invention has problems in the workability, safety, and durability of the concrete structure caused by the erosion of various corrosive media and the deterioration of the material properties of the concrete structure which are prevalent in the external environment.
  • the use of sol, condensation The organic combination of rubber properties works together to inhibit the entry and erosion of corrosive media, achieve effective protection against long-term stability of concrete structures, improve the durability of concrete structures, extend their actual service life, and reduce the cost of maintenance and maintenance in the later period. Invest.
  • the concrete protective sol of the invention fundamentally changes the properties of the "solution” type material, and the ionic solution is improved to a sol which is highly dispersed by ultrafine solid particles, so that the water is in the pores of the concrete and the water It is stated that the main body of the chemical reaction of the booked product is changed from an ion to an ultrafine solid particle.
  • sodium silicate and potassium silicate are made into ultrafine particles with a diameter of l ⁇ 100nm.
  • the composition ratios of sodium silicate and potassium silicate are:
  • the ultrafine solid particles of sodium silicate and potassium silicate are dispersed in water in a dispersion medium at a ratio of 3.2 to 4. 2:1, and the sodium silicate and potassium silicate of the ultrafine solid particles are highly dispersed.
  • the water becomes a sol, wherein the weight ratio of the total amount of the ultrafine solid particles to the total amount of water is 26 to 30%: 74 to 70%.
  • a 200 Kg concrete protective sol was produced.
  • 1. 2 1 is configured as a mixture of 26 ⁇ 30 kg of a mixture of sodium silicate and potassium silicate having a diameter of 1 to 100 nm, respectively, according to a weight ratio of sodium silicate to potassium silicate. ;
  • the sol has the following main physical and chemical indicators:
  • the concrete protective sol adopts nano science technology to increase the dispersion of material particles to a nanometer diameter of l ⁇ 100nm. Nanocrystallization changes the molecular and atomic structure of the original material, so that the ultrafine particles produce surface effects and body effects. The surface effect and the body effect give the ultrafine particles different from the original material properties. Description The new chemical and physical properties of the book make the ultrafine solid particles have excellent specific surface area, excellent chemical reactivity, low melting point and strong magnetic properties.
  • the ultrafine solid particles having a dispersed phase of l ⁇ 100 nm are dispersed in a dispersion medium to obtain a sol (sol) type concrete protective material.
  • Sol-type materials have the characteristics of diffusion (diffusior!), Brownian motion and sedimentation, electrokinetic phenomena, etc., so that the ultrafine solid particles in the sol conform to the molecular motion theory and have dynamic relative stability. And highly dispersible.
  • the gel formed by the reaction of sol and cement hydration product is a rigid gel composed of chemically bonded rigid particles to form a three-dimensional network skeleton structure.
  • the structure is very stable, and it is impossible to heat the water even after dehydration and drying.
  • the sol that is reversed to produce this gel is an irreversible gel.
  • the rigid gel has a certain geometric shape, showing the mechanical properties of the solid, which is expressed by a certain strength, elasticity and yield value.
  • the concrete protective sol has excellent chemical reactivity which reacts in the concrete.
  • the ultrafine particles Since the ratio of the number of atoms on the surface of the ultrafine particles in the material to the total number of atoms increases sharply as the diameter of the particles becomes smaller, the ultrafine particles have a surface effect; and the number of atoms contained in the particles increases due to the increase in the number of atoms on the surface of the ultrafine particles. Decrease, the band gap between the energy levels is increased, and the electronic behavior is affected.
  • the ultrafine particles have a body effect.
  • the surface effect and body effect make the concrete protective sol have excellent chemical reactivity, which is beneficial to the formation of the gel protective layer.
  • the concrete protective sol has a delay in the reaction within the concrete
  • the formulation technology of the concrete protective sol can ensure that the material can delay the penetration time of the material in the concrete and the hydration product, which can ensure the maximum penetration depth of the material in the concrete, which is beneficial to increase the concrete gel protective layer.
  • the thickness of the protection can ensure that the material can delay the penetration time of the material in the concrete and the hydration product, which can ensure the maximum penetration depth of the material in the concrete, which is beneficial to increase the concrete gel protective layer.
  • Concrete protective sol has the consistency of reaction in concrete
  • the material can produce the same quality chemical reaction in the concrete, which is beneficial to the formation of the same quality gel protective layer.
  • the concrete protective sol consists of polydisperse phase particles with a diameter between 1 and 100 nm, of which different diameters
  • the particles of the book play different roles in the concrete pores and in the reaction of the cement hydration products to form a gel.
  • a large particle is mainly formed, and a rigid three-dimensional network skeleton is formed in the reaction, so that the gel layer has a certain geometric shape, showing the mechanical properties of the solid, such as having a certain strength, elasticity and yield value;
  • the particles and small particles are closely packed between the three-dimensional network skeleton and the pore walls, filling the voids, extending as a three-dimensional network skeleton in the pores, reducing the large porosity of the gel layer, and compacting the gel layer;
  • Calcium silicate gels coat the surface and pore walls of various particles by chemical bonds, and bond various particles and pore walls together to form a gel layer with very stable structure, irreversible and solid mechanical properties.
  • the gel formed by the reaction of the concrete protective sol in the pores and gaps of the concrete blocks the pores and gaps, improves the compactness of the concrete, and effectively prevents the gaseous or liquid water in the external environment from entering the concrete, forming a concrete.
  • the overall insulation layer Since the gel present in the pores and slits is a rigid network material composed of extremely fine gel pores, it has a large specific surface area and thus exhibits a strong adsorption capacity.
  • the gel When the gel is in a dry state and the gaseous water in the external environment enters the concrete pores, the gel adsorbs the gaseous water in the gel layer, so that the pores in the concrete gel layer cannot form a pore water film, and the corrosive medium is blocked. The pathway of migration and diffusion into the concrete in the pore water film. As the amount of gaseous water adsorbed by the gel increases, and the amount required to seal the gel pores is reached, the gel seals the pores of the concrete and completely blocks the gaseous water in the external environment from the concrete.
  • the gel adsorbs the liquid water and fills the micro-expansion to seal the gel pores, preventing the subsequent entry of the liquid water, and completely blocking the liquid water in the external environment from the concrete. .
  • the gel formed by the reaction of the concrete protective sol has solid mechanical properties, and is formed integrally with the inner wall of the concrete pore by chemical bonds, and is stably present in the pores of the concrete. Therefore, the gel layer has a high impermeability ratio, reflecting the reliability of the concrete gel barrier.
  • Concrete protective sol can reliably and effectively prevent gaseous or liquid water from entering concrete, making concrete
  • the gel layer inside the specification is kept dry under different water environment conditions.
  • the corrosive medium can neither enter into the concrete with gaseous or liquid water as the carrier, nor the conditions of water and solid-liquid interface necessary for the corrosion reaction.
  • the gel forms a partial barrier to the easily erosive component.
  • the concrete protective sol forms a hydrated calcium silicate gel after chemically reacting with Ca(OH) 2 in the pores and gaps of the concrete.
  • the gel dissolves free Ca(OH) 2 in the pores of the concrete as a component of the gel and protects it by gel;
  • the hydrated calcium silicate gel formed by the reaction encapsulates various particles by chemical bonds.
  • the surface and the pore wall, the encapsulation acts to form a protective film on the surface of the aluminum-containing compound which is easily eroded on the pore wall, and the protective film is thickened and densified as time goes on, and the surface of the aluminum-containing compound is formed.
  • Protect the outer casing is one hand, the gel dissolves free Ca(OH) 2 in the pores of the concrete as a component of the gel and protects it by gel;
  • the hydrated calcium silicate gel formed by the reaction encapsulates various particles by chemical bonds.
  • the surface and the pore wall, the encapsulation acts to form a protective film on the surface of the aluminum-containing compound
  • the surface of Ca(OH) 2 and the aluminum-containing compound is protected by the gel protective film and loses the erosion reaction.
  • the object allows the erosion reaction to proceed unconditionally, and the protective film forms a partial barrier layer to the interior of the concrete.
  • the partial insulation in the concrete destroys another necessary condition for the corrosion reaction of the concrete, and the protection of the concrete is achieved from the point of partial isolation of the easily erosive components inside the concrete.
  • the concrete structure is protected by the overall isolation of the external protective medium of the concrete protective sol and the easily erosive components of the water and the partially isolated concrete.
  • the corrosive medium is 1.
  • the concrete cannot enter the concrete with gaseous or liquid water as the carrier; 2. There is no erosion in the concrete. Object; 3. Drying of the concrete without the conditions of erosion reaction, thereby greatly reducing the possibility of erosion damage to the concrete structure, or greatly reducing the erosion rate of the corrosive medium on the concrete structure, so that the concrete can maintain the original high alkalinity ( On the basis of PH> 11. 5), increase the comprehensive protection ability against corrosive media and improve the durability of concrete structures.
  • the concrete protective sol has the advantage of the gel layer itself against freeze-thaw damage
  • the gel protective layer formed by the concrete protective sol in the concrete is a porous material composed of a gel point composed of a rigid mass point and a three-dimensional network skeleton.
  • the gel densifies the concrete and compacts the larger pores in the concrete into very fine pores and gel pores.
  • the three-dimensional rigid skeleton of the gel layer is slightly expanded after being adsorbed by the initial entering water, and becomes a dense wet gel.
  • the book plugs the passage of the external follow-up water into the concrete, so that the interior of the concrete is kept dry under the protection of the gel layer, which destroys the necessary conditions for the water saturation required for the freeze-thaw damage of the concrete.
  • the gel formed by the reaction in the pores of concrete is a porous gel layer composed of gel pores.
  • the porous gel greatly reduces the diameter of the pores of the concrete so that the water entering the pores of the gel can only be physically adsorbed on the surface of the pore walls of the gel pores in the form of water molecules.
  • the capillary pore diameter of the concrete is greatly reduced to the gel pore size, the freezing point of the adsorbed water in the gel layer is also greatly reduced, and becomes an unfrozen water layer.
  • the concrete protective sol loses the freezing condition of both the interior and the gel layer of the concrete, effectively resisting the damage of the concrete structure by freezing and thawing.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Aftertreatments Of Artificial And Natural Stones (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

L'invention concerne un sol protecteur de béton, composé de silicate de sodium, de silicate de potassium et d'eau, en tant que constituants principaux. Le silicate de sodium et le silicate de potassium mentionnés ici sont des particules solides divisées ultra fines qui présentent un diamètre de 1~100 nm, et leur proportion est définie comme étant (3,2~4,2) : 1. En outre, la proportion du poids brut des particules solides divisées ultra fines et de l'eau dans le sol est de 26~30% : 74~70 %. Puisque le sol protecteur de béton est préparé à partir de particules solides divisées ultra fines complètement dispersées, ce qui fait passer le sujet qui réagit avec l'hydrate dans le capillaire du béton de l'état d'ions à celui de particules solides divisées ultra fines, on obtient une double protection contre la ségrégation intégrale et partielle, ce qui fait que, sur la base de cette double protection efficace, le point fort du sol protecteur de béton résulte de la combinaison et de la conjonction du sol et du gel. On peut généralement conclure que les avantages du sol protecteur de béton résident dans son aptitude à résister à la dégradation, qui permet au sol de résister fortement à l'envahissement et à l'érosion par le milieu caustique, et protège par conséquent la structure en béton d'une manière stable et efficace à long terme, améliorant vraiment sa durabilité et prolongeant de ce fait sa durée de vie. En conséquence, la maintenance est considérablement diminuée.
PCT/CN2007/002274 2006-08-04 2007-07-27 Sol protecteur de béton Ceased WO2008017240A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009522072A JP5406026B2 (ja) 2006-08-04 2007-07-27 コンクリート防護コロイドゾル

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200610029739.0 2006-08-04
CN2006100297390A CN101117281B (zh) 2006-08-04 2006-08-04 混凝土防护溶胶

Publications (1)

Publication Number Publication Date
WO2008017240A1 true WO2008017240A1 (fr) 2008-02-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2007/002274 Ceased WO2008017240A1 (fr) 2006-08-04 2007-07-27 Sol protecteur de béton

Country Status (3)

Country Link
JP (1) JP5406026B2 (fr)
CN (1) CN101117281B (fr)
WO (1) WO2008017240A1 (fr)

Cited By (1)

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WO2010089780A1 (fr) * 2009-02-04 2010-08-12 Said S.P.A. Composition et procédé pour l'étanchéification de la surface de matériaux de construction

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CN104591675B (zh) * 2015-01-27 2017-01-25 金陵科技学院 一种防腐混凝土
CN104556944B (zh) * 2015-02-09 2016-05-18 陈吉美 一种混凝土防护溶胶
CN104926251A (zh) * 2015-05-27 2015-09-23 张家港市山牧新材料技术开发有限公司 一种混凝土防护溶胶
IT201600092198A1 (it) * 2016-09-13 2018-03-13 Antolini Luigi & C S P A Metodo per il trattamento di un supporto in materiale lapideo
FR3102183B1 (fr) * 2019-10-17 2022-01-21 Saint Gobain Weber Composition pour le traitement de surfaces au contact de l’eau pour préserver la qualité de l’eau
CN110982314A (zh) * 2019-12-25 2020-04-10 无锡华东锌盾科技有限公司 一种无机水性无机清水混凝土保护剂及制备方法
CN112831201B (zh) * 2021-01-04 2022-01-04 中国铁路设计集团有限公司 一种硅质无机纳米渗透型混凝土结构防护涂料的制备方法

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JP2004131316A (ja) * 2002-10-09 2004-04-30 Tomita Yutaka コンクリート改質材
JP2004256350A (ja) * 2003-02-26 2004-09-16 Aica Kogyo Co Ltd 水性浸透性組成物とコンクリートの表面強化方法
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Publication number Priority date Publication date Assignee Title
WO2010089780A1 (fr) * 2009-02-04 2010-08-12 Said S.P.A. Composition et procédé pour l'étanchéification de la surface de matériaux de construction

Also Published As

Publication number Publication date
CN101117281B (zh) 2010-09-22
CN101117281A (zh) 2008-02-06
JP5406026B2 (ja) 2014-02-05
JP2009545508A (ja) 2009-12-24

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