CN105601143A - Powdery shrinkage-reducing agent used for dry-mixed mortar and preparation method thereof - Google Patents
Powdery shrinkage-reducing agent used for dry-mixed mortar and preparation method thereof Download PDFInfo
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- CN105601143A CN105601143A CN201510953253.5A CN201510953253A CN105601143A CN 105601143 A CN105601143 A CN 105601143A CN 201510953253 A CN201510953253 A CN 201510953253A CN 105601143 A CN105601143 A CN 105601143A
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- dry
- economization agent
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- mixed mortar
- shrinkage
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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
- C04B40/0042—Powdery mixtures
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a powdery shrinkage-reducing agent used for dry-mixed mortar and a preparation method thereof, the powdery shrinkage-reducing agent is prepared from a shrinkage-reducing compound, a modifying additive and an anti-sticking isolation material by a spray drying method, and the powdery shrinkage-reducing agent comprises 100 parts of the shrinkage-reducing compound, 0.3 to 1.0 part of the modifying additive and 5 to 15 parts of the anti-sticking isolation material. The powdery shrinkage-reducing agent is a powdery shrinkage-reducing anti-sticking product, and is free of non-volatile organic solvent residues, when in use, no irritating smell is produced, and the powdery shrinkage-reducing agent is suitable for using in dry-mixed mortar systems, helps to reduce dry-mixed mortar shrinkage cracking risks, improves dry-mixed mortar crack resistance, and provides helps for expanding a use range of the shrinkage-reducing agent product.
Description
Technical field
The present invention relates to a kind of dry-mixed mortar additive, be specifically related to a kind of preparation method of powdery economization agent.
Background technology
In architectural engineering, mortar is huge, the broad-spectrum construction material of a kind of consumption. Dry-mixed mortar be withThe various raw materials of drying regime by a certain percentage, through professional factory accurately prepare mix evenly after, with packed or looseDress mode is transported to behind job site, place to use add water to scale mix and stir after use the pre-sand cutting of oneSlurry. To the eighties in 20th century, dry-mixed mortar is as a new and high technology of building material industry, progressively complete in EuropeBecome substituting traditional mortar. Through the development of more than 30 years, European market became dry-mixed mortar in the world and sends outThe area that exhibition is the most ripe, in all mortar products in Europe, dry-mixed mortar occupies more than 90% share.Still belong to new industry at China's dry-mixed mortar, be known as New Building Materials. In recent years, China's dry-mixed mortar is capableIndustry has obtained significant progress, and within 2013, the whole nation is used dry-mixed mortar output to exceed 4,000 ten thousand tons, especiallyThat the ground dry-mixed mortars such as Tianjin, Nanjing, Jinan, Chengdu, Wuhan are developed rapidly. In recent years, along withImproving constantly of national requirements for environmental protection, the dry-mixed mortar that meets environmental requirement in construction site popularization has become various placesThe urgent task of Fang Jianshe authorities. Corresponding provincial standard and policy method have all been put into effect in most domestic areaRule, actively promote dry-mixed mortar. From the historical experience of European and American developed countries, dry-mixed mortar is premixing mortarThe main flow of market development and trend. And the coming five years, global dry-mixed mortar production and marketing scale also will continue to rise. OrderBefore, just progressively shift to Asia at the center in global dry-mixed mortar market, and Asia especially Chinese market is heavyIn heavy, Chinese dry-mixed mortar market is followed and enters a fast-developing passage.
In recent years, along with the development of modern technologies and the raising of people's living standard, people are to living environmentHave higher requirement, the performance of common dry-mixed mortar can not meet present stage and following demand, to sandStarch this large construction material and have higher requirement, it just towards high strength, high tenacity, high resistant split, heightAntiseepage, high durable future development. The tensile strength of conventional dry-mixed mortar is low, limit elongation is little, fragility is aobviousWork, mixture in the situation such as sunshine, wind, do not have time enough form tensile strength with opposing due to soonThe pore shrinkage stress that speed evaporation produces, easily produces shrinkage cracking. Therefore, from improving the angle of cracking resistanceDegree, improves designing quality, extending structure service life, is the very important real class of pendulum in face of oursTopic and task. Adopting anticracking grout to be dry mixed slurry is most important measure, is to improve mortar to resist and mix additiveThe most basic means of fragility ability.
From features such as engineering structure failure damages, crack is the macro manifestations that structural deterioration was lost efficacy, and producesThe mechanism process in crack is except being subject to various load actions affect, and volume contraction is that cement-based material produces crackKey factor. Therefore which kind of approach, to reduce contraction, the raising cement-based material cracking resistance of cement-based material byProperty has become the focus of current research. For the generation reason of cement-based material crack, scientific worker has developedEconomization agent (SRA) is in order to alleviate the contraction of even eliminating cement-based material. Economization agent is tried out from starting at first,Just show extremely good reducing and effect of anti-cracking, and be acknowledged as having most of cement-based material crack controlOne of effect measure, up to the present, economization agent be widely used in flat board, road surface, bridge, training wall,Reservoir and water treatment plant concrete structure engineering. One of distinguishing feature of economization agent is that its action effect is not supported by constructionThe impact of guard strip part, is applicable to the construction work of various curing conditions. But current existing economization agent is mainFor fluid product, organic solvent content is large, volatile, have penetrating odor simultaneously, affects workmen's bodyBody health, and fluid product also cannot be applied to as anticracking material the preparation of dry-mixed mortar, significantly limitedApplying of economization agent product.
Summary of the invention
The object of the invention is to the deficiency for existing liquid economization agent, provide one to be applicable to dry-mixed mortarThe preparation method of powdery economization agent. Product of the present invention is a kind of powdery reducing and anti-cracking product, is applied to and is dry mixed sandIn slurry system, reduce the shrinkage cracking risk of dry-mixed mortar, promote the crack resistance of dry-mixed mortar, reduce for expandingThe agent scope of application is offered help.
The invention provides a kind of powdery economization agent for dry-mixed mortar, by reduce compound, modified additive,Antiseized isolated material, is prepared and is obtained by spray drying process, and each composition weight umber ratio of this powdery economization agent is:
Reduce 100 parts of compounds,
0.3～1.0 part of modified additive,
5～15 parts of antiseized isolated materials;
The described compound that reduces is commercial small molecule alcohol or APEO class I liquid I economization agent, preferred, instituteState and reduce JM-SRA economization agent or the Gray that compound is Jiangsu Subotexin Material Co., Ltd's productionThe EclipseFloor economization agent that this company produces;
Described modified additive is potassium peroxydisulfate;
Described antiseized isolated material, for floating pearl, is a kind of fly ash hollow ball, surface-closed and smooth.
The preparation method of the powdery economization agent for dry-mixed mortar of the present invention, comprises the steps:
(1) by the potassium peroxydisulfate of 0.3～1.0 weight portion, join in the deionized water of 30～50 weight portions, addThermal agitation is dissolved it completely, obtains potassium persulfate solution, as modified additive solution, for subsequent use;
(2) compound that reduces of 100 weight portions is joined in reactor, be warming up to 50 DEG C, then by upperState the modified additive solution that step (1) makes and be added dropwise in reactor, time for adding is 60min, dripsInsulation reaction 30min～60min after finishing, obtains modified liquid economization agent, stand-by;
(3) the modified liquid economization agent of being prepared by the antiseized isolated material of 5～15 weight portion and step (2) is evenMix, after strong stirring, making waits to spray reduces compound emulsion mixture, then spray dry, and spray200 DEG C of the inlet temperatures of mist drier, 60 DEG C of outlet temperatures, can obtain a kind of fine-powdered economization agent finished product.
Beneficial effect of the present invention is:
The present invention, compared with existing product, is fine-powdered material, without volatile organic solvent residual, when use withoutPenetrating odor produces, and can be used for premixing dry-mixed mortar field, can obviously improve the crack resistance kimonos of dry-mixed mortarLabour performance, offers help for expanding the economization agent product scope of application.
Detailed description of the invention
For a better understanding of the present invention, when the following example, further illustrate of the present invention, should notBe considered to any type of restriction of the present invention.
Embodiment 1
Take in the deionized water that 0.3 part of potassium peroxydisulfate joins 30 parts, it is molten that heating for dissolving makes potassium peroxydisulfateLiquid; The JM-SRA economization agent that takes 100 parts of Jiangsu Subotexin Material Co., Ltd's productions joinsIn reactor, be warming up to 50 DEG C, then above-mentioned modified additive solution be added dropwise in reactor to time for addingFor 60min, dropwise rear insulation reaction 30min, obtain modified liquid economization agent; Take 15 weight portionsAntiseized isolated material adds in reactor and evenly mixes with modified liquid economization agent, makes to be painted after strong stirringMist reduces compound emulsion mixture, then with screw pump, emulsion mixture to be painted is transported to spray dryer topIn the charging aperture of portion, spray dry, 200 DEG C of the inlet temperatures of spray dryer, 60 DEG C of outlet temperatures,Can obtain a kind of fine-powdered economization agent finished product FJS-1.
Embodiment 2
Take in the deionized water that 0.5 part of potassium peroxydisulfate joins 40 parts, it is molten that heating for dissolving makes potassium peroxydisulfateLiquid; The JM-SRA economization agent that takes 100 parts of Jiangsu Subotexin Material Co., Ltd's productions joinsIn reactor, be warming up to 50 DEG C, then above-mentioned modified additive solution be added dropwise in reactor to time for addingFor 60min, dropwise rear insulation reaction 40min, obtain modified liquid economization agent; Take 10 weight portionsAntiseized isolated material adds in reactor and evenly mixes with modified liquid economization agent, makes to be painted after strong stirringMist reduces compound emulsion mixture, then with screw pump, emulsion mixture to be painted is transported to spray dryer topIn the charging aperture of portion, spray dry, 200 DEG C of the inlet temperatures of spray dryer, 60 DEG C of outlet temperatures,Can obtain a kind of fine-powdered economization agent finished product FJS-2.
Embodiment 3
Take in the deionized water that 1.0 parts of potassium peroxydisulfates join 50 parts, it is molten that heating for dissolving makes potassium peroxydisulfateLiquid; The EclipseFloor economization agent that takes 100 parts of W. R. Grace & Co's productions joins in reactor, heats upTo 50 DEG C, then above-mentioned modified additive solution is added dropwise in reactor, time for adding is 60min, dripsInsulation reaction 60min after finishing, obtains modified liquid economization agent; Taking the antiseized isolated material of 5 weight portion adds insteadAnswer in still and evenly mix with modified liquid economization agent, after strong stirring, making that to treat that compound emulsion is reduced in spraying mixedCompound, is then transported to emulsion mixture to be painted in the charging aperture at spray dryer top with screw pump, carries outSpraying is dry, 200 DEG C of the inlet temperatures of spray dryer, and 60 DEG C of outlet temperatures, can obtain a kind of fine-powderedEconomization agent finished product FJS-3.
With reference to building material industry standard JCT/603-2004 " cement mortar dry shrinkage test method ", by institute of the present inventionOn powdery economization agent FJS-1, the FJS-2 obtaining and FJS-3 and market, conventional liquid reduces product J M-SRAEconomization agent and EclipseFloor economization agent mix in cement mortar, comparative study FJS-1, FJS-2, FJS-3,FJS and EclipseFloor be the dry contraction inhibition to cement mortar under dry environment condition, test knotFruit is in table 1.
Table 1
As can be seen from Table 1, the powdery economization agent that prepared by the embodiment of the present invention has good reducing to cement mortarEffect just can reach liquid economization agent (JM-SRA and the Eclipse of same composition under 1% volume conditionFloor) Reduce shrinkage effect when 2% volume. In view of the present invention is that fine-powdered is reduced product, can be used for premixing and be dry mixedMortar industry, offers help to solving a dry-mixed mortar shrinkage cracking difficult problem, for the popularization that expands economization agent product shouldProvide technical support by scope.
Claims (3)
1. for a powdery economization agent for dry-mixed mortar, it is characterized in that, by reducing compound, modified additive, antiseized isolated material, prepared and obtained by spray drying process, each composition weight umber ratio of this powdery economization agent is:
Reduce 100 parts of compounds,
0.3 ~ 1.0 part of modified additive,
5 ~ 15 parts of antiseized isolated materials;
The described compound that reduces is commercial small molecule alcohol or APEO class I liquid I economization agent;
Described modified additive is potassium peroxydisulfate;
Described antiseized isolated material, for floating pearl, is a kind of fly ash hollow ball, surface-closed and smooth.
2. a kind of powdery economization agent for dry-mixed mortar according to claim 1, it is characterized in that, described in reduce compound be Jiangsu Subotexin Material Co., Ltd produce JM-SRA economization agent or W. R. Grace & Co produce EclipseFloor economization agent.
3. the preparation method of a kind of powdery economization agent for dry-mixed mortar described in claim 1 or 2, is characterized in that, comprises the steps:
(1) by the potassium peroxydisulfate of 0.3 ~ 1.0 weight portion, join in the deionized water of 30 ~ 50 weight portions, add thermal agitation it is dissolved completely, obtain potassium persulfate solution, as modified additive solution, for subsequent use;
(2) compound that reduces of 100 weight portions is joined in reactor, be warming up to 50 DEG C, the modified additive solution then above-mentioned steps (1) being made is added dropwise in reactor, time for adding is 60min, dropwise rear insulation reaction 30min ~ 60min, obtain modified liquid economization agent, stand-by;
(3) the modified liquid economization agent of the antiseized isolated material of 5 ~ 15 weight portion being prepared with step (2) evenly mixes, after strong stirring, making waits to spray reduces compound emulsion mixture, then spray dry, 200 DEG C of the inlet temperatures of spray dryer, 60 DEG C of outlet temperatures, can obtain a kind of fine-powdered economization agent finished product.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117735923A (en) * | 2023-12-19 | 2024-03-22 | 科顺民用建材有限公司 | Method for preparing dust-free joint mixture |
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| CN101168480A (en) * | 2006-10-23 | 2008-04-30 | 浙江合力新型建材有限公司 | High-performance concrete corrosion-resistant anti-cracking agent and producing method thereof |
| CN101817655A (en) * | 2010-03-23 | 2010-09-01 | 清华大学 | Novel shrinkage reducing compacting agent special for concrete |
| CN102531458A (en) * | 2010-12-09 | 2012-07-04 | 苏笮斌 | Anti-crack and anti-corrosion plasticizer composition and preparation method thereof |
| CN103387363A (en) * | 2013-08-19 | 2013-11-13 | 湖南交泰建材有限公司 | Cement-based repair mortar |
-
2015
- 2015-12-17 CN CN201510953253.5A patent/CN105601143B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168480A (en) * | 2006-10-23 | 2008-04-30 | 浙江合力新型建材有限公司 | High-performance concrete corrosion-resistant anti-cracking agent and producing method thereof |
| CN101817655A (en) * | 2010-03-23 | 2010-09-01 | 清华大学 | Novel shrinkage reducing compacting agent special for concrete |
| CN102531458A (en) * | 2010-12-09 | 2012-07-04 | 苏笮斌 | Anti-crack and anti-corrosion plasticizer composition and preparation method thereof |
| CN103387363A (en) * | 2013-08-19 | 2013-11-13 | 湖南交泰建材有限公司 | Cement-based repair mortar |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117735923A (en) * | 2023-12-19 | 2024-03-22 | 科顺民用建材有限公司 | Method for preparing dust-free joint mixture |
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Effective date of registration: 20180321 Address after: Jiangning District of Nanjing City, Jiangsu province 211103 Li Quan Lu No. 118 Patentee after: Jiangsu Jill Mstar Technology Ltd Address before: Jiangning District of Nanjing City, Jiangsu province 211100 Li Quan Lu No. 118 Patentee before: Jiangsu Subute New Materials Co., Ltd. |
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