CN103803844B - Cracking resistance reinforcing agent of inorganic coating material for building and a preparation method of cracking resistance reinforcing agent - Google Patents
Cracking resistance reinforcing agent of inorganic coating material for building and a preparation method of cracking resistance reinforcing agent Download PDFInfo
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Abstract
The invention relates to a cracking resistance reinforcing agent of an inorganic coating material for a building and a preparation method of the cracking resistance reinforcing agent. The cracking resistance reinforcing agent of the inorganic coating material for the building is prepared by the mixing of a water supplementing component, a water retaining component, a surface tension reducing component and a defoaming component. With the adoption of the cracking resistance reinforcing agent, the inorganic coating material can be avoided from cracking, or the cracking resisting effect of the inorganic coating material can be improved, and thus the inorganic coating material being high in cracking resistance, high in weather resistance, green and environmentally-friendly and applied to the building can be obtained.
Description
Technical field
The invention belongs to building material technical field, be specifically related to crack-resisting reinforcing agent of a kind of inorganic materials for building and preparation method thereof.
Background technology
As a kind of effective measure reducing concrete steel building generation corrosion failure risk, external protective coating material is subject to the extensive concern of domestic and international academia and industry member due to its high performance-price ratio and construction convenience always.China industry standard JTJ275-2000 " concrete structure anticorrosion technique specification ", JT/T695-2007 " concrete bridge structure top coat aseptic technic condition " and JT/T821-2011 " concrete bridge structure surface protective system " have all carried out regulation and requirement for the outer guard technology of concrete structure.ACI is that in " in concrete metal anti-corrosion protection " (Protection of Metals in Concrete Against Corrosion) report of ACI222R-01, clearly barrier material being considered as can one of four kinds of technology effectively controlling corrosion of metal in skeleton construction at code name.
Different according to effective constituent composition source in barrier material, two classes can be divided into: organic coating and inorganic paint.Compared with organic protection material, inorganic anti-corrosion paint have raw material sources extensively, the advantage such as cost is low with energy consumption, be convenient to shipping storage, ageing-resistant performance is good, environmental protection, genus Environmentally friendly coatings is one of developing direction of green construction material.Inorganic materials with water glass or silicon sol etc. for main base; utilize the principle that silicate film forming is solidified; form the protective coating of-Si-O-Si-structure at reinforced concrete surface, thus stop moisture and corrosive medium directly contact with reinforced concrete surface and transmit.
However, the thin layer state of coated material and reaction mechanism, determine inorganic materials and there is the technical barrier that cubic deformation is large and cracking sensitivity is strong, thus limit the widespread use of inorganic protective material at building field.Therefore, under the prerequisite substantially not changing existing production technique and working condition, the application of crack-resisting reinforcing agent to inorganic materials that exploitation is suitable for inorganic materials is significant.In existing document and patent, shrink for inorganic materials and be greater than a difficult problem easy to crack, the mechanism of mainly shrinking from the lifting of inorganic materials toughness, expansion compensation is started with, and mainly adopts the technique means such as fiber, polymer emulsion or rubber powder, hard particles and swelling agent to improve the resistance to cleavage of inorganic materials.
Chinese Patent Application No. 201110023484.8 describes a kind of inorganic high-strength filler for coating, does aggregate with white quartz sand, silica powder, mixes wollastonite powder, polypropylene fibre anticracking material, and mixes ether of cellulose and rubber powder cooperation.
Describing anticrack additive in a kind of inorganic paint in Chinese Patent Application No. 201110127465.X is 80 ~ 120 object coarse particles stone flours or short glass fiber or polypropylene fibre.
Chinese Patent Application No. 03108713.2 describes in exterior wall putty and also added filamentary material and elastic emulsion composition, thus improves the splitting resistance of putty system.
A kind of anti-cracking agent for mortar described in Chinese Patent Application No. 200610025870.X utilizes the water-soluble polymers of modification, swelling agent and polypropylene fibre to improve Mortar shrinkage.
Increase toughness although employ in above-mentioned patent application specification and shrink the technology suppressed, but exist and improve effect of prestressed problem poor or with high costs, there is under can not fundamentally solving rigor condition the problem of Cracking of the inorganic materials of laminate structure feature.
About cracking resistance component in inorganic materials or sand-cement slurry all have employed traditional cracking resistance component and method in prior art, but in fact inorganic materials is as a kind of layer material being coated on building surface, the Cracking Mechanism main manifestations under ambient temperature and humidity effect is the ultimate tensile strength that excessive dry shrinkage stress after the quick dehydration of layer material exceedes inorganic materials.Therefore, for above-mentioned mechanism, adopt through time successively release the method for water, effectively can alleviate the quick dehydration effect of inorganic materials under thin layer state, thus reduce or avoid the cracking of inorganic protective material.
To achieve these goals, technical scheme of the present invention is: the crack-resisting reinforcing agent that the invention provides a kind of inorganic materials for building, its composition comprises: moisturizing component, water-retaining component, reduction surface tension component and froth breaking component, and the mass ratio of aforementioned four is followed successively by 1:0.1 ~ 1.5:0.5 ~ 1.5:0.05 ~ 0.5;
Described moisturizing component is hydroscopic high-molecular resin material, need meet following technical indicator: under 5-50 DEG C of condition, within 0.5 hour, inhales alkaline solution (Ca (OH)
2saturated solution) multiplying power is greater than 20g/g; Under 60 DEG C of conditions, within 2 hours, water retention is greater than 50%;
Described suction alkaline solution (Ca (OH)
2saturated solution) testing method of multiplying power is as follows: takes hydroscopic high-molecular resin material with watch-glass and is about 10g, put into 105 DEG C, baking oven and be dried to constant weight, take 5g water-absorbing resin with 500 order nylon cloth bags, and put into and fill Ca (OH)
2in the 1000ml beaker of saturated solution, until resin water absorption and swelling after 0.5 hour, take out water-absorbing resin and also determine its quality, with hydroscopic high-molecular resin material, to inhale before and after alkaline solution of poor quality obtains water absorbent rate divided by hydroscopic high-molecular resin quality of materials.
Every hydroscopic high-molecular resin material meeting above-mentioned two conditions all can be used for the present invention, such as absorption resin of sodium polyacrylate, polyacrylic acid-acrylamide water-absorbing resin, polyvinyl alcohol water-absorbing resin etc.
Described water-retaining component is the macromolecular compound with ether structure be made up of Mierocrystalline cellulose, and this water-retaining component need meet following technical indicator: rotary viscosity value is 20000-100000; Gelling temp is 40-100 DEG C; Under 20 DEG C of conditions, water retention is greater than 80%.
Described reduction surface tension component is for can reduce basic solution (Ca (OH)
2saturated solution) capillary tensio-active agent, this reduction surface tension component need meet following technical indicator: at 25 DEG C, within the scope of PH=8-14, solution surface tension is less than 50mN/m.
Described froth breaking component is solid defoamer, by any one in modified polyorganosiloxane, mono-glycerides, mannitol or any two with the mixing of arbitrary proportion.
Described water-retaining component refer to any one or any two in methylcellulose gum, hydroxyethylmethyl-cellulose, carboxymethyl cellulose, ethyl cellulose, benzyl cellulose, Natvosol, Vltra tears, cyanoethyl cellulose, α-tolunitrile ethyl cellulose, carboxymethyl hydroxyethyl cellulose and benzyl cellulose etc. with the mixing of arbitrary proportion;
Described reduction surface tension component refers to sodium stearate, Sodium dodecylbenzene sulfonate, quaternary ammonium compound, any one or any two of Yelkin TTS, trolamine, tri-isopropanolamine, butyl glycol ether, fluorocarbon surfactant, organic silicon surfactant with the mixing of arbitrary proportion.
Described froth breaking component is solid defoamer, by modified polyorganosiloxane, mono-glycerides, mannitol etc. any one or any two with the mixing of arbitrary proportion.
In above-mentioned crack-resisting reinforcing agent moisturizing component, water-retaining component, reduction surface tension component and froth breaking component and separately mass ratio can realize following net effect: water-retaining component is conducive to realizing the maintenance of the plastic state of inorganic materials after apply to condensation cure state initial stage moisture in materials, avoid coated material surface-moisture fast the lost string stress caused increase fast; Moisturizing component can realize moisture and scatter and disappear fast under condition, dynamically supplements coated material surface-moisture, effectively suppresses the too fast dehydration of coated material under drying conditions, ensures the release of coated material condensation cure middle and later periods moisture simultaneously and supplement; Reduce effective reduction that surface tension component can realize solution surface tension in inorganic materials pore, thus reduce on the basis of rate-of-loss of coolant in moisturizing component and water-retaining component, realize meniscus in pore and produce capillary reduction, reduce coated material season cracking risk further; Froth breaking component, by the air blister defect avoiding admixture crack-resisting reinforcing agent inorganic materials to produce, avoids affecting inorganic materials product appearance.
In sum, the above-mentioned four kinds of components of crack-resisting reinforcing agent and proportioning thereof are conducive to realizing the resist drying shrinkage cracking ability of inorganic materials in plastic stage and setting and harden stage, have obvious synergistic enhancing effect.
The preparation method of the crack-resisting reinforcing agent of inorganic materials for building of the present invention comprises the steps: to take aforementioned component by proportioning, is less than after 300 orders through grinding to grain diameter, then obtains the crack-resisting reinforcing agent of inorganic materials after stirring.
The crack-resisting reinforcing agent of inorganic materials for building of the present invention, adopts 1 ~ 10% of outer doping equivalent substitution inorganic materials weight.
The invention has the beneficial effects as follows:
The first, when the crack-resisting reinforcing agent mixing inorganic materials of inorganic materials for building of the present invention is coated on building surface, the inorganic materials internal moisture realizing the coated material surface hardening initial stage is effectively kept.
The second, in inorganic materials military service process, when experience environmental activity and internal chemical react, reduce inorganic materials internal moisture loss speed.
3rd, reduce the surface tension of thin layer inorganic materials internal pore structure.
Because of above-mentioned three reasons, improve the splitting resistance of coated material, weathering resistance.
Summary of the invention
The object of the present invention is to provide crack-resisting reinforcing agent of a kind of inorganic materials for building and preparation method thereof, the method can be avoided inorganic materials to ftracture or improve the effect of prestressed of inorganic materials, prepares the inorganic materials for building with high cracking resistance, high durable, environmental protection.
Embodiment
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.
Embodiment 1:
A preparation method for the crack-resisting reinforcing agent of inorganic materials for building, it comprises the steps:
1) moisturizing component: technical grade absorption resin of sodium polyacrylate, under 5-50 DEG C of condition, inhales alkaline solution (Ca (OH) in 0.5 hour
2saturated solution) multiplying power is 30g/g; Under 60 DEG C of conditions, within 2 hours, water retention is 60%.
2) reduce surface tension component: technical grade hydroxyethylmethyl-cellulose, rotary viscosity value is 40000; Gelling temp is 60 DEG C; Under 20 DEG C of conditions, water retention is 88%;
3) reduce surface tension component: technical grade Sodium dodecylbenzene sulfonate, at 25 DEG C, within the scope of PH=12, solution surface tension is 40mN/m;
4) froth breaking component: technical grade solid modified polyorganosiloxane defoamer.
5) preparation method: first, by above-mentioned moisturizing component, water-retaining component, reduction surface tension component and froth breaking component, is that 1:0.8:1:0.2 weighs according to mass ratio; Secondly, above-mentioned materials component is less than after 300 orders through grinding to grain diameter, then obtains the crack-resisting reinforcing agent of inorganic materials after stirring.
Application: the crack-resisting reinforcing agent of inorganic materials of the present invention, adopts 6% of outer doping equivalent replacement inorganic materials quality.Thus prepare the inorganic materials possessing high anti-cracking performance.The raw material ratio adopted is: commercially available inorganic materials: 1000kg; Crack-resisting reinforcing agent: 6kg(mass percent, 0.6%).Wherein, crack-resisting reinforcing agent proportioning is: moisturizing component: 2kg; Water-retaining component: 1.6kg; Reduce surface tension component: 2kg; Froth breaking component: 0.4kg.Pulverizer process will be put into 15 minutes by the above-mentioned crack-resisting reinforcing agent component of metering, treat that grain diameter is less than 300 orders and can completes toughener preparation.
The commercially available inorganic paint of commercially available inorganic materials and admixture crack-resisting reinforcing agent is contrasted by cracking test,
Described commercially available inorganic paint refers to the Lan Haitong neck more inorganic paint of Guangzhou Lan Haitong building materials company limited.
Result shows: be 20 ± 2 DEG C in room temperature, relative humidity is under 50% condition, experience 50 watts of lamp heated with, the acting in conjunction of 2m/s gas blower 9 hours, there is cracking and peeling phenomenon in the commercially available inorganic materials being coated on 300 × 300mm sand-cement slurry surface, and uses the inorganic materials of crack-resisting reinforcing agent that cracking and peeling phenomenon do not occur.
In order to the beneficial effect of crack-resisting reinforcing agent of the present invention to inorganic materials splitting resistance is described, compared for the impact of different crack-resisting reinforcing agent on inorganic materials performance, concrete test-results asks for an interview table 1.As shown in Table 1, this coated material performance of admixture crack-resisting reinforcing agent of the present invention meets the technical requirements of JT/T695-2007 " concrete bridge structure top coat aseptic technic condition ".
Table 1 coating performance index
* environment residing for the season cracking time is 20 ± 2 DEG C, 50 ± 10%RH (h), experiences the acting in conjunction of 50 watts of lamp heated and 2m/s gas blower
Embodiment 2:
A preparation method for the crack-resisting reinforcing agent of inorganic materials for building, it comprises the steps:
1) moisturizing component: technical grade polyacrylic acid-acrylamide water-absorbing resin, under 5-50 DEG C of condition, inhales alkaline solution (Ca (OH) in 0.5 hour
2saturated solution) multiplying power is 40g/g; Under 60 DEG C of conditions, within 2 hours, water retention is 70%.
2) reduce surface tension component: technical grade Vltra tears, rotary viscosity value is 100000; Gelling temp is 50 DEG C; Under 20 DEG C of conditions, water retention is 85%;
3) reduce surface tension component: technical grade sodium stearate, at 25 DEG C, within the scope of PH=12, solution surface tension is 42mN/m;
4) froth breaking component: technical grade solid modified polyorganosiloxane defoamer.
5) preparation method: first, by above-mentioned moisturizing component, water-retaining component, reduction surface tension component and froth breaking component, is that 1:0.6:1.2:0.2 weighs according to mass ratio; Secondly, above-mentioned materials component is less than after 300 orders through grinding to grain diameter, then obtains the crack-resisting reinforcing agent of inorganic materials after stirring.
Application: the crack-resisting reinforcing agent of inorganic materials of the present invention, adopts 4% of outer doping equivalent replacement inorganic materials quality.Thus prepare the inorganic materials possessing high anti-cracking performance.The raw material ratio adopted is: commercially available inorganic materials: 1000kg; Crack-resisting reinforcing agent: 4kg(mass percent, 0.4%).Wherein, crack-resisting reinforcing agent proportioning is: moisturizing component: 1.3kg; Water-retaining component: 0.8kg; Reduce surface tension component: 1.6kg; Froth breaking component: 0.3kg.Pulverizer process will be put into 20 minutes by the above-mentioned crack-resisting reinforcing agent component of metering, treat that grain diameter is less than 300 orders and can completes toughener preparation.
The commercially available inorganic paint of commercially available inorganic materials and admixture crack-resisting reinforcing agent is contrasted by cracking test, result shows: be 20 ± 2 DEG C in room temperature, relative humidity is under 50% condition, experience the acting in conjunction 11 hours of 50 watts of lamp heated and 2m/s gas blower, there is cracking and peeling phenomenon in the commercially available inorganic materials being coated on 300 × 300mm sand-cement slurry surface, and uses the inorganic materials of crack-resisting reinforcing agent that cracking and peeling phenomenon do not occur.In order to the beneficial effect of crack-resisting reinforcing agent of the present invention to inorganic materials splitting resistance is described, compared for the impact of different crack-resisting reinforcing agent on inorganic materials performance, concrete test-results asks for an interview table 2.As shown in Table 2, this coated material performance of admixture crack-resisting reinforcing agent of the present invention meets JT/T695-2007 " concrete bridge structure top coat aseptic technic condition ".
Table 2 coating performance index
* environment residing for the season cracking time is 20 ± 2 DEG C, 50 ± 10%RH (h), experiences the acting in conjunction of 50 watts of lamp heated and 2m/s gas blower
Embodiment 3:
A preparation method for the crack-resisting reinforcing agent of inorganic materials for building, it comprises the steps:
1) moisturizing component: industrial-grade polyethylene alcohol water-absorbing resin, under 5-50 DEG C of condition, inhales alkaline solution (Ca (OH) in 0.5 hour
2saturated solution) multiplying power is 60g/g; Under 60 DEG C of conditions, within 2 hours, water retention is 75%.
2) reduce surface tension component: technical grade carboxymethyl hydroxyethyl cellulose, rotary viscosity value is 80000; Gelling temp is 55 DEG C; Under 20 DEG C of conditions, water retention is 86%;
3) reduce surface tension component: fluorocarbon surfactant, at 25 DEG C, within the scope of PH=12, solution surface tension is 35mN/m;
4) froth breaking component: technical grade mono-glycerides defoamer.
5) preparation method: first, by above-mentioned moisturizing component, water-retaining component, reduction surface tension component and froth breaking component, is that 1:1.0:0.8:0.2 weighs according to mass ratio; Secondly, above-mentioned materials component is less than after 300 orders through grinding to grain diameter, then obtains the crack-resisting reinforcing agent of inorganic materials after stirring.
Application: the crack-resisting reinforcing agent of inorganic materials of the present invention, adopts 3% of outer doping equivalent replacement inorganic materials quality.Thus prepare the inorganic materials possessing high anti-cracking performance.The raw material ratio adopted is: commercially available inorganic materials: 1000kg; Crack-resisting reinforcing agent: 3kg(mass percent, 0.3%).Wherein, crack-resisting reinforcing agent proportioning is: moisturizing component: 1kg; Water-retaining component: 1kg; Reduce surface tension component: 0.8kg; Froth breaking component: 0.2kg.Pulverizer process will be put into 30 minutes by the above-mentioned crack-resisting reinforcing agent component of metering, treat that grain diameter is less than 300 orders and can completes toughener preparation.
The commercially available inorganic paint of commercially available inorganic materials and admixture crack-resisting reinforcing agent is contrasted by cracking test, result shows: be 20 ± 2 DEG C in room temperature, relative humidity is under 50% condition, experience the acting in conjunction 10 hours of 50 watts of lamp heated and 2m/s gas blower, there is cracking and peeling phenomenon in the commercially available inorganic materials being coated on 300 × 300mm sand-cement slurry surface, and uses the inorganic materials of crack-resisting reinforcing agent that cracking and peeling phenomenon do not occur.In order to the beneficial effect of crack-resisting reinforcing agent of the present invention to inorganic materials splitting resistance is described, compared for the impact of different crack-resisting reinforcing agent on inorganic materials performance, concrete test-results asks for an interview table 3.As shown in Table 3, this coated material performance of admixture crack-resisting reinforcing agent of the present invention meets the technical requirements of JT/T695-2007 " concrete bridge structure top coat aseptic technic condition ".
Table 3 coating performance index
* environment residing for the season cracking time is 20 ± 2 DEG C, 50 ± 10%RH (h), experiences the acting in conjunction of 50 watts of lamp heated and 2m/s gas blower
Each raw material bound value of the present invention, and its interval value can realize the present invention, does not enumerate enforcement at this
Example.
Claims (4)
1. the crack-resisting reinforcing agent of an inorganic materials for building, it is characterized in that: its composition comprises: moisturizing component, water-retaining component, reduction surface tension component and froth breaking component, and the mass ratio of aforementioned four is followed successively by 1:0.1 ~ 1.5:0.5 ~ 1.5:0.05 ~ 0.5;
Described moisturizing component is hydroscopic high-molecular resin material, need meet following technical indicator: under 5-50 DEG C of condition, and within 0.5 hour, inhale basic solution multiplying power and be greater than 20g/g, described basic solution refers to Ca (OH)
2saturated solution; Under 60 DEG C of conditions, within 2 hours, water retention is greater than 50%;
Described water-retaining component is the macromolecular compound with ether structure be made up of Mierocrystalline cellulose, and this water-retaining component need meet following technical indicator: rotary viscosity value is 20000-100000; Gelling temp is 40-100 DEG C; Under 20 DEG C of conditions, water retention is greater than 80%;
Described reduction surface tension component is for can reduce the capillary tensio-active agent of basic solution; This reduction surface tension component need meet following technical indicator: at 25 DEG C, within the scope of pH=8-14, solution surface tension is less than 50mN/m;
Described froth breaking component is solid defoamer, refer to any one or any two in modified polyorganosiloxane, mono-glycerides, mannitol with the mixing of arbitrary proportion.
2. the crack-resisting reinforcing agent of inorganic materials for building according to claim 1, is characterized in that: described water-retaining component refer to any one or any two in methylcellulose gum, hydroxyethylmethyl-cellulose, carboxymethyl cellulose, ethyl cellulose, benzyl cellulose, Natvosol, Vltra tears, cyanoethyl cellulose, α-tolunitrile ethyl cellulose, carboxymethyl hydroxyethyl cellulose and benzyl cellulose with the mixing of arbitrary proportion.
3. the crack-resisting reinforcing agent of inorganic materials for building according to claim 1, it is characterized in that: described reduction surface tension component refers to sodium stearate, Sodium dodecylbenzene sulfonate, quaternary ammonium compound, any one or any two of Yelkin TTS, trolamine, tri-isopropanolamine, butyl glycol ether, fluorocarbon surfactant, organic silicon surfactant with the mixing of arbitrary proportion.
4. the preparation method of the crack-resisting reinforcing agent of the inorganic materials for building described in any one in claims 1 to 3, it is characterized in that: take aforementioned component by proportioning, be less than after 300 orders through grinding to grain diameter, then after stirring, namely obtain the crack-resisting reinforcing agent of described inorganic materials for building.
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| CN104628300B (en) * | 2014-11-24 | 2017-02-08 | 江苏苏博特新材料股份有限公司 | Workability regulating agent of alkali-activated salic inorganic coating material as well as preparation method and application of workability regulating agent |
| CN108349809A (en) * | 2015-10-21 | 2018-07-31 | Sika技术股份公司 | The adulterating agent of internal post-processing is carried out to mineral binder composition |
| CN108624210A (en) * | 2018-05-29 | 2018-10-09 | 贵州盛卓科科技有限公司 | A kind of hydrophobic nano-silica aeroge aqueous slurry |
| CN108793819B (en) * | 2018-07-23 | 2020-12-29 | 中建商品混凝土广西有限公司 | Composite concrete anti-cracking agent and preparation method thereof |
| CN108912852A (en) * | 2018-09-21 | 2018-11-30 | 贵州盛卓科科技有限公司 | A kind of hydrophobic silicon dioxide aerogel coating or putty coating surface size |
| CN112145784B (en) * | 2020-09-22 | 2022-05-31 | 丽水红宇阀门有限公司 | Compensation type manual valve wear-resistant anticorrosive coating |
| CN112430041A (en) * | 2020-12-09 | 2021-03-02 | 北京欣江峰建筑材料有限公司 | Impervious concrete and preparation method thereof |
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