CN114538818A - Preparation method of concrete reinforcing agent and product - Google Patents
Preparation method of concrete reinforcing agent and product Download PDFInfo
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- CN114538818A CN114538818A CN202210311110.4A CN202210311110A CN114538818A CN 114538818 A CN114538818 A CN 114538818A CN 202210311110 A CN202210311110 A CN 202210311110A CN 114538818 A CN114538818 A CN 114538818A
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- 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
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a preparation method of a concrete reinforcing agent and a product, wherein the preparation method comprises the following steps: s1, mixing and stirring all the raw materials of a base material uniformly, wherein the base material comprises the following raw materials in parts by weight: 400 portions of pure acrylic emulsion and 450 portions of wetting agent, 0.6 portion to 1.0 portion; 1-2 parts of a dispersant; 1-3 parts of a preservative and 1-3 parts of a defoaming agent; 25-30 parts of a film-forming assistant; 5-9 parts of propylene glycol; 1-3 parts of a thickening agent; 14-18 parts of metakaolin; s2, diluting the prepared base material and water according to the weight ratio of 1:0.8-1 to obtain a mixture A; s3, mixing 60-80 parts of potassium silicate and water according to a weight ratio of 1: diluting 0.8-1 to obtain a mixture B; s4, mixing and stirring the mixture A of 50 wt% and the mixture B of 50 wt% uniformly to obtain the catalyst. The concrete reinforcing agent can improve the strength and durability of a concrete base surface.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a preparation method and a product of a concrete reinforcing agent.
Background
In the actual construction process of concrete engineering, the quality of concrete is affected by the types of cement, excessively high admixture content, excessive water-cement ratio of concrete and even private addition of excessive water and a water reducing agent by constructors in the concrete pouring process, so that the surface of concrete is pulverized and sanded, and the surface strength of concrete is relatively low. The surface treatment of concrete is a method capable of effectively improving the durability and service life of the concrete. The main action principle is as follows: by utilizing the physical and chemical reaction between the surface treating agents or the physical and chemical reaction between the surface treating agents and the concrete, fillers such as C-S-H gel, AFt, high molecular compounds and the like are generated in the micro defects and the pores on the surface of the concrete, so that the micro defects and the pores on the surface of the concrete are blocked, and the micro structure on the surface of the concrete is more flat and compact. But the adhesion between the polymer coating and the concrete is poor, the polymer coating is easy to crack, the later carbonization of the concrete can be only inhibited, and the reinforcing effect on the concrete with low surface strength cannot be realized. The inorganic surface reinforcing agent can react with active substances in the concrete chemically so as to make the concrete more compact and finally achieve the effect of increasing the surface strength. However, for concrete with longer age, the internal active substances are basically completely reacted, so that two-component surface reinforcing agents are developed in the market at present, and the internal structure of the concrete is filled by supplementing the two reactive active substances. However, because many concretes are outdoors for a long time, the surface of the concrete is dry, the concentration of the surface reinforcing agent coated on the surface of the concrete can be rapidly increased, the surface reinforcing agent is dehydrated and cured, and the further penetration of the surface reinforcing agent is blocked, and the reaction medium of the two-component surface reinforcing agent is water without the action of water, so that the two components can not effectively react, thereby enabling the concrete to be more compact and finally achieving the reinforcing effect.
Chinese patent document CN112723914A discloses a concrete surface reinforcing agent and a preparation method thereof, wherein the reinforcing agent is composed of internal microspheres, a middle oil phase for coating and dispersing the internal microspheres, and an external water phase for coating the middle oil phase. Wherein, the external water phase consists of deionized water and hydrophilic surfactant; the intermediate oil phase consists of mineral oil and oleophilic dispersant; the inner microspheres are core-shell microspheres; the weight percentage of each raw material is as follows: 10-35% of deionized water, 1-30% of hydrophilic surfactant, 30-50% of mineral oil, 1-15% of oleophilic dispersant and 10-20% of core-shell microspheres; the hydrophilic surfactant is prepared by mixing at least two of raw materials such as Span60, Span80 and the like; the mineral oil is white oil; the oleophilic dispersant is oleic acid, stearic acid, cetyl trimethyl ammonium bromide.
Chinese patent document CN111875284 discloses a pervious concrete reinforcing agent and a preparation method and application thereof. The pervious concrete reinforcing agent comprises the following components in percentage by mass: 60-70% of silica fume, 8-15% of fly ash zeolite powder, 2-4% of a polycarboxylic acid water reducing agent, 5-10% of dispersible latex powder, 1-2% of methyl cellulose ether, 0.5-1% of sodium dodecyl benzene sulfonate, 5-10% of a fiber material, 4-7% of an early strength agent and 1-3% of a coagulant.
Chinese patent document CN114014984A discloses a microgel concrete surface reinforcing agent and a preparation method thereof, wherein the reinforcing agent comprises 920-970 parts of shell-core structure microgel, 0.5-4 parts of titanium salt, 2-18 parts of organic titanium, 0.8-4 parts of organic chromium, 0.1-1 part of manganese salt, 0.2-2 parts of organic manganese and 0.1-1.5 parts of organic magnesium.
These prior art documents do not suggest how to improve the strength and durability of the concrete base surface.
Disclosure of Invention
In view of the above, the present invention is directed to a concrete reinforcing agent capable of improving the strength and durability of a concrete base surface, and a method for preparing the same.
The adopted technical scheme is as follows:
the preparation method of the concrete reinforcing agent comprises the following steps:
s1, mixing and stirring all raw materials of a base material uniformly, wherein the base material comprises the following raw materials in parts by weight: 400 portions of pure acrylic emulsion and 450 portions of wetting agent, 0.6 portion to 1.0 portion; 1-2 parts of a dispersant; 1-3 parts of a preservative and 1-3 parts of a defoaming agent; 25-30 parts of a film-forming assistant; 5-9 parts of propylene glycol; 1-3 parts of a thickening agent; 14-18 parts of metakaolin;
s2, diluting the prepared base material and water according to the weight ratio of 1:0.8-1 to obtain a mixture A;
s3, mixing 60-80 parts of potassium silicate and water according to a weight ratio of 1: diluting 0.8-1 to obtain a mixture B;
s4, mixing and stirring 50 wt% of the mixture A and 50 wt% of the mixture B uniformly to prepare the concrete reinforcing agent.
Further, in S1, the base material is composed of the following raw materials in parts by weight: 400 parts of pure acrylic emulsion and 0.8 part of wetting agent; 1.5 parts of a dispersing agent; 2 parts of a preservative and 2 parts of a defoaming agent; 27 parts of a film-forming assistant; 6 parts of propylene glycol; 2 parts of a thickening agent; 15 parts of metakaolin.
Further, in S1, the coalescing agent is an alcohol ester twelve. The chemical name of the alcohol ester twelve is 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate. The Iseman coalescent, TEXANOL, may be selected.
Further, in S1, the thickener is an anionic hydrophobically modified acrylic acid alkali swellable thickener. The Dow chemical TT935 thickener may be selected.
Further, in S1, the metakaolin is anhydrous aluminum silicate formed by dehydration at 600-900 ℃. In particular, the metakaolin is kaolin (Al)2O3·2SiO2·2H2O) is taken as raw material, dehydrated at a proper temperature (600-900 ℃) to form anhydrous aluminum silicate (Al)2O3·2SiO2). Metakaolin is a ground fine powder material, the particle size is about 2 mu m, and the specific surface area is about 25000m3In terms of/kg. The metakaolin has hydrophobic characteristics and is easily dispersed in concrete reinforcing agents.
The metakaolin contains the active components of hydrated aluminum silicate and calcium hydroxide separated out by hydration of cement, and the hydrated calcium-aluminum-melilite and secondary C-S-H gel with gel property are generated by reaction, and the hydration products not only enhance the compression resistance, bending resistance and splitting tensile strength of concrete, but also increase the bending resistance toughness of fiber concrete. The late strength of these products, which are formed by the hydration of metakaolin, is still increasing, even comparable to the reinforcing effect of silica fume.
Under the action of metakaolin, the concrete reinforcing agent can improve the strength of a concrete base surface, high strength is one of the signs of high performance of concrete, and under the action of metakaolin, the concrete reinforcing agent is added to mainly improve the strength of the concrete base surface. Secondly, the frost resistance is improved, under the action of metakaolin, the aperture of the concrete is greatly reduced after the concrete reinforcing agent is doped into the concrete, and the freeze-thaw resistance cycle of the concrete is improved.
Further, in S1, the wetting agent is a liquid water-soluble nonionic surfactant. For example, the Dow wetting agent TRITON X-405 can be selected, where X-405 is a liquid, water-soluble, nonionic surfactant having a high HLB value and strong emulsifying and wetting power.
Further, in S2, the formulated base material was diluted with water at a weight ratio of 1:1 to obtain a mixture a. In S2, the prepared base material and water are diluted according to the weight ratio of 1:1 to obtain a mixture A.
Further, in S3, 60-80 parts of potassium silicate and water are mixed according to the weight ratio of 1:1 to obtain a mixture B.
Further, in S3, 70 parts of potassium silicate and water are mixed in a weight ratio of 1:1 to obtain a mixture B.
The concrete reinforcing agent is prepared by the preparation method of the concrete reinforcing agent in any scheme.
The concrete reinforcing agent has low surface tension, can quickly permeate into the concrete, and can perform secondary reaction with byproducts of cement hydration in the concrete, such as calcium hydroxide, to generate a large amount of silicon dioxide gel, and the gel can block capillary micropores in the concrete, so that the compactness, compressive strength, hardness and wear resistance of the concrete surface are increased, and the strength of the concrete can be generally improved by 5-10 MPa. The chemical reaction between the concrete surface reinforcing agent and relevant components in the concrete is more complicated, and besides the generation of silica gel, some hard and compact substances are generated, so that the strength of the concrete is obviously increased.
The concrete reinforcing agent is non-toxic, tasteless, green and environment-friendly, and forms a compact crystal through chemical reaction with concrete penetration. The construction is simple and convenient, and the ideal wear resistance, hardening strength and penetration enhancement can be achieved only by spraying and brushing: effectively permeate 1-30 mm. The material reacts with the material in the concrete to form a compact whole; the compressive strength is improved by 10-40%, and the strength and the density are effectively improved.
The concrete reinforcing agent of the invention is used as follows:
1. the basic layer requires that: the concrete surface is cleaned and kept dry, the loose tissue of the concrete surface is beneficial to absorbing materials, and the concrete reinforcing agent is applied to the cracks and the defect parts for reinforcing and hardening treatment.
2. Hardening treatment: the concrete reinforcing agent is sprayed and coated on the wall surface, so that the base layer is fully soaked and absorbed, the absorbed concrete reinforcing agent is supplemented at any time, and the soaking state is maintained, so that the whole wall surface and the ground are completely soaked; the concrete reinforcing agent is supplemented and coated at any time, and the base layer can be fully absorbed within 2 hours.
The product can be used normally after being dried and maintained for 7 days; the construction temperature is preferably 10-35 ℃, and outdoor operation is avoided in rainy days, strong wind and freezing.
The invention has the following beneficial effects:
1. compared with other concrete reinforcing agents in the prior art, the concrete reinforcing agent has the advantages of quicker and more complete reaction, quicker and higher strength increase and wider application range.
2. The wear resistance and durability of the concrete base surface can be obviously improved.
3. The construction time is short, the operation is simple and easy, and the production is not required to be interrupted.
4. The cost is economical, the cost performance is high.
Detailed Description
The present invention is described in detail below with reference to specific examples, but the use and purpose of these exemplary embodiments are merely to exemplify the present invention, and do not set forth any limitation on the actual scope of the present invention in any form, and the scope of the present invention is not limited thereto.
Example 1
The preparation method of the concrete reinforcing agent of the embodiment comprises the following steps:
s1, mixing and stirring all raw materials of a base material uniformly, wherein the base material comprises the following raw materials in parts by weight: 400 parts of pure acrylic emulsion and 0.6 part of wetting agent; 1 part of a dispersant; 1 part of preservative and 1 part of defoaming agent; 25 parts of a film-forming assistant; 5 parts of propylene glycol; 2 parts of a thickening agent; 14 parts of metakaolin; wherein the film-forming additive is alcohol ester twelve; the thickening agent is an anionic hydrophobic modified acrylic acid alkali swelling thickening agent; the metakaolin is anhydrous aluminum silicate formed by dehydration at 600-900 ℃, the particle size is about 2 mu m, and the specific surface area is about 25000m3/kg。
S2, diluting the prepared base material with water according to the weight ratio of 1:1 to obtain a mixture A;
s3, diluting 70 parts of potassium silicate and water according to the weight ratio of 1:1 to obtain a mixture B;
s4, mixing and stirring 50 wt% of the mixture A and 50 wt% of the mixture B uniformly to prepare the concrete reinforcing agent.
Example 2
Referring to example 1, the difference from example 1 is that the concrete reinforcing agent of this example comprises the following raw materials in parts by weight: 400 parts of pure acrylic emulsion and 0.8 part of wetting agent; 1.5 parts of a dispersing agent; 2 parts of a preservative and 2 parts of a defoaming agent; 27 parts of a film-forming assistant; 6 parts of propylene glycol; 2 parts of a thickening agent; 15 parts of metakaolin.
Example 3
Referring to example 1, the difference from example 1 is that the concrete reinforcing agent of this example comprises the following raw materials in parts by weight: 450 parts of pure acrylic emulsion and 1.0 part of wetting agent; 2 parts of a dispersing agent; 2 parts of a preservative and 3 parts of a defoaming agent; 30 parts of a film-forming assistant; 9 parts of propylene glycol; 3 parts of a thickening agent; 18 parts of metakaolin.
And (3) performance testing:
selecting a commercially available surface reinforcing agent product: selecting a concrete reinforcing agent in the prior art as a comparative example 1, coating the concrete reinforcing agents of examples 1-3 and the comparative example 1 on the surface of the test piece after the test piece is molded for 28d, and testing the resilience value of the concrete test piece for 28d according to a standard method of technical specification JGJ/123-2001 for testing the compressive strength of the concrete by a resilience method. The durability of the concrete is tested according to the standard GB/T50082-2009 Standard test method for the long-term performance and durability of the common concrete. See table 1.
TABLE 1
As can be seen from table 1, the concrete reinforcing agent can improve the strength and durability of the concrete base surface. Compared with other concrete reinforcing agents in the prior art, the concrete reinforcing agent has the advantages of quicker and more complete reaction, quicker and higher strength increase and wider application range.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. The preparation method of the concrete reinforcing agent is characterized by comprising the following steps:
s1, mixing and stirring all raw materials of a base material uniformly, wherein the base material comprises the following raw materials in parts by weight: 400 portions of pure acrylic emulsion and 450 portions of wetting agent, 0.6 portion to 1.0 portion; 1-2 parts of a dispersant; 1-3 parts of a preservative and 1-3 parts of a defoaming agent; 25-30 parts of a film-forming assistant; 5-9 parts of propylene glycol; 1-3 parts of a thickening agent; 14-18 parts of metakaolin;
s2, diluting the prepared base material and water according to the weight ratio of 1:0.8-1 to obtain a mixture A;
s3, mixing 60-80 parts of potassium silicate and water according to a weight ratio of 1: diluting 0.8-1 to obtain a mixture B;
s4, mixing and stirring 50 wt% of the mixture A and 50 wt% of the mixture B uniformly to prepare the concrete reinforcing agent.
2. The method for preparing the concrete reinforcing agent according to claim 1, wherein in S1, the base material comprises the following raw materials in parts by weight: 400 parts of pure acrylic emulsion and 0.8 part of wetting agent; 1.5 parts of a dispersing agent; 2 parts of a preservative and 2 parts of a defoaming agent; 27 parts of a film-forming assistant; 6 parts of propylene glycol; 2 parts of a thickening agent; 15 parts of metakaolin.
3. The method for producing a concrete reinforcing agent according to claim 1, wherein in S1, the coalescing agent is alcohol ester twelve.
4. The method for producing a concrete reinforcing agent according to claim 1, wherein in S1, the thickener is an anionic hydrophobically modified alkali-swellable thickener of acrylic acid.
5. The method for preparing a concrete reinforcing agent according to claim 1, wherein in S1, the metakaolin is anhydrous aluminum silicate formed by dehydration at 600-900 ℃.
6. The method for producing a concrete reinforcing agent according to claim 1, wherein in S1, the wetting agent is a liquid water-soluble nonionic surfactant.
7. The method for producing a concrete reinforcing agent according to claim 1, wherein in S2, the formulated binder is diluted with water at a weight ratio of 1:1 to obtain mixture a. In S2, the prepared base material and water are diluted according to the weight ratio of 1:1 to obtain a mixture A.
8. The method for preparing a concrete reinforcing agent according to claim 1, wherein in S3, 60 to 80 parts by weight of potassium silicate and water are mixed in a weight ratio of 1:1 to obtain a mixture B.
9. The method for preparing a concrete reinforcing agent according to claim 8, wherein in S3, 70 parts of potassium silicate and water are mixed in a weight ratio of 1:1 to obtain a mixture B.
10. A concrete reinforcing agent produced by the method for producing a concrete reinforcing agent according to any one of claims 1 to 9.
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| CN114195455A (en) * | 2021-12-17 | 2022-03-18 | 广东嘉宝莉科技材料有限公司 | Waterproof galling concrete interface treating agent and construction method thereof |
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| US5998525A (en) * | 1996-12-02 | 1999-12-07 | Fmc Corporation | Coating and composition for transportation and sign surfaces and method of preparing and applying same |
| CN107955472A (en) * | 2017-11-24 | 2018-04-24 | 科顺防水科技股份有限公司 | A kind of organo-mineral complexing decoration waterproof integrated coating of alkali resistant and preparation method thereof |
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