CN105601143B - A kind of powdery economization agent for dry-mixed mortar and preparation method thereof - Google Patents
A kind of powdery economization agent for dry-mixed mortar and preparation method thereof Download PDFInfo
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- CN105601143B CN105601143B CN201510953253.5A CN201510953253A CN105601143B CN 105601143 B CN105601143 B CN 105601143B CN 201510953253 A CN201510953253 A CN 201510953253A CN 105601143 B CN105601143 B CN 105601143B
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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 invention provides a kind of suitable for powdery economization agent of dry-mixed mortar and preparation method thereof, the powdery economization agent is by decrement compound, modified additive, anti-sticking isolated material, it is prepared by spray drying process, each component ratio of weight and number is 100 parts of compound of decrement, 0.3 ~ 1.0 part of modified additive, anti-sticking 5 ~ 15 parts of isolated material.Product of the present invention is a kind of powdery reducing and anti-cracking product, remained without volatile organic solvent, have no irritating odor generation during use, suitable for dry-mixed mortar system, advantageously reduce the shrinkage cracking risk of dry-mixed mortar, the crack resistance of dry-mixed mortar is lifted, help is provided to expand economization agent product use range.
Description
Technical field
The present invention relates to a kind of dry-mixed mortar additive, and in particular to a kind of preparation method of powdery economization agent.
Background technology
In architectural engineering, mortar is the construction material that a kind of dosage is huge, widely used.Dry-mixed mortar is to dry shape
The various raw materials of state by a certain percentage, after professional factory accurate formulation mix is uniform, is transported in a manner of packed or be in bulk and applied
Behind work scene, a kind of premixing mortar for adding water to be used after mixing and stirring to scale in place to use.To in the 1980s, dry-mixed
A new and high technology of the mortar as building material industry, the replacement to traditional mortar is gradually completing in Europe.By more than 30 years
Development, European market turn into the area that dry-mixed mortar development is the most ripe in the world, dry-mixed in all mortar products in Europe
Mortar occupies more than 90% share.In China, dry-mixed mortar still belongs to new industry, referred to as New Building Materials.In recent years,
China's dry-mixed mortar industry achieves significant progress, and the whole nation in 2013 uses dry-mixed mortar yield more than 40,000,000 tons, especially
It is that the ground such as Tianjin, Nanjing, Jinan, Chengdu, Wuhan dry-mixed mortar is developed rapidly.In recent years, as national environmental protection will
The continuous improvement asked, the dry-mixed mortar for meeting environmental requirement is promoted in construction site as the urgent of each place construction authorities
Cut task.Corresponding provincial standard and policies and regulations have all been put into effect in most domestic area, actively promote dry-mixed mortar.From America and Europe
From the point of view of the historical experience of developed country, dry-mixed mortar is the main flow and trend of premixing mortar market development.And the coming five years, the whole world
Dry-mixed mortar production and marketing scale will also persistently rise.At present, the center of global dry mortar market is just progressively shifted to Asia, and sub-
Continent especially Chinese market is then the most important thing so that Chinese dry mortar market tracks into a fast-developing passage.
In recent years, as the continuous development and the improvement of people's living standards of modern technologies, people propose to living environment
Higher requirement, the performance of common dry-mixed mortar can not meet at this stage and it is following the needs of, to mortar, this large is built
Build material and propose higher requirement, it is just towards high intensity, high tenacity, high resistant split, high antiseepage, high durable direction are developed.
The tensile strength of conventional dry-mixed mortar is low, limit elongation is small, fragility is notable, and mixture does not have when sunshine, wind
Time enough forms tensile strength to resist due to pore shrinkage stress caused by rapid evaporation, easily produces contraction and opens
Split.Therefore, from the angle for improving cracking resistance, designing quality is improved, extending structure service life, is one of pendulum in face of us
Individual critically important real problem and task.It is most important measure using the dry-mixed slurry of anticracking grout, and it is to carry to mix additive
The most basic means of high mortar cracking resistance power.
From the point of view of the features such as engineering structure failure damage, crack is the macro manifestations of structure damage inactivation, and produces crack
Mechanism process in addition to being influenceed by various load actions, volume contraction be cement-based material produce crack key factor.Cause
This, has turned into the heat of current research by which kind of approach to reduce the contraction of cement-based material, improve cement-based material crack resistance
Point.For the producing cause of cement-based material crack, scientific worker develops economization agent (SRA) to mitigate or even eliminate water
The contraction of cement-based material.Economization agent is tried out since initially, just shows extremely good decrement and effect of anti-cracking, and be recognized
To be one of most effective measure of cement-based material crack control, 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 its action effect
Do not influenceed by construction and maintenance condition, suitable for the construction work of various curing conditions.But existing economization agent is main at present
For fluid product, organic solvent content is big, volatile while have penetrating odor, influences workmen's health, and
Fluid product can not also be applied to the preparation of dry-mixed mortar as anticracking material, and the popularization that significantly limit economization agent product should
With.
The content of the invention
It is an object of the invention to the deficiency for existing liquid economization agent, there is provided a kind of powder suitable for dry-mixed mortar
The preparation method of shape economization agent.Product of the present invention is a kind of powdery reducing and anti-cracking product, applied in dry-mixed mortar system, is reduced
The shrinkage cracking risk of dry-mixed mortar, the crack resistance of dry-mixed mortar is lifted, help is provided to expand economization agent use range.
The invention provides a kind of powdery economization agent for dry-mixed mortar, by decrement compound, modified additive, it is anti-sticking every
From material, it is prepared by spray drying process, each component ratio of weight and number of the powdery economization agent is：
Reduce 100 parts of compound,
0.3~1.0 part of modified additive,
Anti-sticking 5~15 parts of isolated material；
The decrement compound is commercial small molecule alcohol or APEO class I liquid I economization agent, it is preferred that described to subtract
Contracting compound is JM-SRA economization agents or the W. R. Grace ＆ Co's production of Jiangsu Subotexin Material Co., Ltd's production
Eclipse Floor economization agents；
The modified additive is potassium peroxydisulfate；
The anti-sticking isolated material is floating bead, is a kind of fly ash hollow ball, surface-closed and it is smooth.
The preparation method of powdery economization agent of the present invention for dry-mixed mortar, comprises the following steps：
(1) by the potassium peroxydisulfate of 0.3~1.0 parts by weight, it is added in the deionized water of 30~50 parts by weight, heating stirring
It is completely dissolved, obtains potassium persulfate solution, it is standby as modified additive solution；
(2) the decrement compound of 100 parts by weight is added in reactor, is warming up to 50 DEG C, then by above-mentioned steps (1)
Obtained modified additive solution is added dropwise in reactor, time for adding 60min, be added dropwise rear insulation reaction 30min~
60min, modified liquid economization agent is obtained, it is stand-by；
(3) the anti-sticking isolated material of 5~15 parts by weight is uniformly mixed with modified liquid economization agent prepared by step (2), passed through
Decrement compound emulsion mixture to be sprayed is made after strong stirring, is then spray-dried, the import temperature of spray dryer
200 DEG C of degree, 60 DEG C of outlet temperature, you can obtain a kind of fine-powdered economization agent finished product.
It is of the present invention to have the beneficial effect that：
The present invention is fine-powdered material compared with existing product, no volatile organic solvent residual, nonirritant during use
Smell produces, and available for premixing dry-mixed mortar field, can significantly improve the crack resistance and military service performance of dry-mixed mortar, subtract to expand
Contracting agent product use range provides help.
Embodiment
The present invention is further illustrated in order to be better understood from the present invention, during the following example, should not be recognized
For be to the present invention any type of limitation.
Embodiment 1
Weigh 0.3 part of potassium peroxydisulfate to be added in 30 parts of deionized water, dissolve by heating and potassium persulfate solution is made；Weigh
The JM-SRA economization agents of 100 parts of Jiangsu Subotexin Material Co., Ltd's productions are added in reactor, are warming up to 50 DEG C,
Then above-mentioned modified additive solution is added dropwise in reactor, time for adding 60min, rear insulation reaction 30min is added dropwise,
Obtain modified liquid economization agent；Weigh and uniformly mixed with modified liquid economization agent in the anti-sticking isolated material addition reactor of 15 parts by weight
Close, decrement compound emulsion mixture to be sprayed is made after strong stirring, it is then with screw pump that emulsion mixture to be painted is defeated
It is sent in the charging aperture at the top of spray dryer, is spray-dried, 200 DEG C of the inlet temperature of spray dryer, outlet temperature
60 DEG C, you can obtain a kind of fine-powdered economization agent finished product FJS-1.
Embodiment 2
Weigh 0.5 part of potassium peroxydisulfate to be added in 40 parts of deionized water, dissolve by heating and potassium persulfate solution is made；Weigh
The JM-SRA economization agents of 100 parts of Jiangsu Subotexin Material Co., Ltd's productions are added in reactor, are warming up to 50 DEG C,
Then above-mentioned modified additive solution is added dropwise in reactor, time for adding 60min, rear insulation reaction 40min is added dropwise,
Obtain modified liquid economization agent；Weigh and uniformly mixed with modified liquid economization agent in the anti-sticking isolated material addition reactor of 10 parts by weight
Close, decrement compound emulsion mixture to be sprayed is made after strong stirring, it is then with screw pump that emulsion mixture to be painted is defeated
It is sent in the charging aperture at the top of spray dryer, is spray-dried, 200 DEG C of the inlet temperature of spray dryer, outlet temperature
60 DEG C, you can obtain a kind of fine-powdered economization agent finished product FJS-2.
Embodiment 3
Weigh 1.0 parts of potassium peroxydisulfates to be added in 50 parts of deionized water, dissolve by heating and potassium persulfate solution is made；Weigh
The Eclipse Floor economization agents of 100 parts of W. R. Grace ＆ Co's productions are added in reactor, are warming up to 50 DEG C, then will be above-mentioned
Modified additive solution is added dropwise in reactor, time for adding 60min, and rear insulation reaction 60min is added dropwise, and obtains modification liquid
Body economization agent；Weigh and uniformly mixed with modified liquid economization agent in the anti-sticking isolated material addition reactor of 5 parts by weight, through strongly stirring
Decrement compound emulsion mixture to be sprayed is made after mixing, emulsion mixture to be painted is then transported to spray drying with screw pump
In charging aperture at the top of device, it is spray-dried, 200 DEG C of the inlet temperature of spray dryer, 60 DEG C of outlet temperature, you can obtain
A kind of fine-powdered economization agent finished product FJS-3.
With reference to building material industry standard JC T/603-2004《Cement mortar dry shrinkage test method》, by the powder obtained by the present invention
The liquid decrement product J M-SRA economization agents and Eclipse that shape economization agent FJS-1, FJS-2 and FJS-3 and in the market are commonly used
In Floor economization agents incorporation cement mortar, comparative study FJS-1, FJS-2, FJS-3, FJS and Eclipse Floor are in drying
Inhibition is shunk to drying for cement mortar under environmental condition, result of the test is shown 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 Reduce shrinkage effect to cement mortar,
In liquid economization agent (JM-SRA and Eclipse Floor) 2% volume with regard to same composition can be reached under the conditions of 1% volume
Reduce shrinkage effect.In view of the present invention reduces product for fine-powdered, available for premixing dry-mixed mortar industry, shunk to solving dry-mixed mortar
Cracking problem provides help, and technical support is provided to expand the extent of spreading amd application of economization agent product.
Claims (3)
1. a kind of powdery economization agent for dry-mixed mortar, it is characterised in that by decrement compound, modified additive, anti-sticking isolation
Material, it is prepared by spray drying process, each component ratio of weight and number of the powdery economization agent is：
Reduce 100 parts of compound,
0.3 ~ 1.0 part of modified additive,
Anti-sticking 5 ~ 15 parts of isolated material；
The decrement compound is commercial small molecule alcohol or APEO class I liquid I economization agent；
The modified additive is potassium peroxydisulfate；
The anti-sticking isolated material is floating bead, is a kind of fly ash hollow ball, surface-closed and it is smooth.
A kind of 2. powdery economization agent for dry-mixed mortar according to claim 1, it is characterised in that the decrement chemical combination
Thing is the JM-SRA economization agents of Jiangsu Subotexin Material Co., Ltd's production or the Eclipse of W. R. Grace ＆ Co's production
Floor economization agents.
A kind of 3. preparation method of powdery economization agent for dry-mixed mortar described in claim 1 or 2, it is characterised in that bag
Include following steps：
（1）The potassium peroxydisulfate of 0.3 ~ 1.0 parts by weight is added in the deionized water of 30 ~ 50 parts by weight, heating stirring makes its complete
Fully dissolved, potassium persulfate solution is obtained, it is standby as modified additive solution；
（2）The decrement compound of 100 parts by weight is added in reactor, is warming up to 50 DEG C, then by above-mentioned steps（1）It is made
Modified additive solution be added dropwise in reactor, time for adding 60min, rear insulation reaction 30min ~ 60min is added dropwise, obtains
Modified liquid economization agent is obtained, it is stand-by；
（3）By the anti-sticking isolated material of 5 ~ 15 parts by weight and step（2）The modified liquid economization agent of preparation uniformly mixes, through strongly stirring
Decrement compound emulsion mixture to be sprayed is made after mixing, is then spray-dried, the inlet temperature 200 of spray dryer
DEG C, 60 DEG C of outlet temperature, you can obtain a kind of fine-powdered economization agent finished product.
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| CN201510953253.5A CN105601143B (en) | 2015-12-17 | 2015-12-17 | A kind of powdery economization agent for dry-mixed mortar and preparation method thereof |
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| CN105601143B true CN105601143B (en) | 2018-01-02 |
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| CN101817655B (en) * | 2010-03-23 | 2012-05-16 | 清华大学 | Novel shrinkage reducing compacting agent special for concrete |
| CN102531458B (en) * | 2010-12-09 | 2014-05-28 | 苏笮斌 | Anti-crack and anti-corrosion plasticizer composition and preparation method thereof |
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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. |