CN104556799B - There is room temperature water reducer of water-reducing rate height, excellent dispersion and preparation method thereof - Google Patents
There is room temperature water reducer of water-reducing rate height, excellent dispersion and preparation method thereof Download PDFInfo
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- CN104556799B CN104556799B CN201410821514.3A CN201410821514A CN104556799B CN 104556799 B CN104556799 B CN 104556799B CN 201410821514 A CN201410821514 A CN 201410821514A CN 104556799 B CN104556799 B CN 104556799B
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Abstract
The present invention discloses a kind of has that water-reducing rate is high, the novel normal-temperature water reducer of excellent dispersion, it is characterized in that, this water reducer is prepared from by each component of following percentage by weight: methyl allyl polyoxyethylene ether 30 40%, self-control auxiliary agent 1 10%, acrylic acid 10 20%, triethanolamine 1 5%, ascorbic acid 1 5%, sheet alkali 1 5%, water 40 60%, above each weight percentages of components sum is 100%.The present invention has without reacting by heating, and it is high that room temperature can realize water-reducing rate, and its dispersive property is excellent, the advantage reducing energy consumption.
Description
Technical field
The present invention relates to technical field of concrete, be specifically related to one and there is water-reducing rate height (26.1%), excellent dispersion
The room temperature water reducer of (slump/divergence/mm 90min 210/380) and preparation method thereof.
Background technology
Along with the needs of development, concrete technology and consumption require more and more higher, concrete wants tight in the process of use
Lattice control its shrinkage cracking rate, prevent potential safety hazard；Interpolation additive is used at present in order to solve above-mentioned technical problem
Form such as water reducer overcomes concrete slump to damage the problem that the shrinkage cracking rate caused is high；Due to concrete slump loss
Basic reason be the hydration reaction of cement, water generation hydration reaction met by cement, along with the carrying out of hydration reaction, a part from
Being wrapped during cement granules condenses by water, another part Free water is evaporated and causes in concrete slurry
Free water gradually decreases.
For above-mentioned principle, the most also occurring in that multiple water reducer such as naphthalene series high-efficiency water-reducing agent, tripolycyanamide is high
Effect water reducer, sugar calcium class water reducer etc., but yet suffer from the problem that concrete slump loss is too fast；And, above-mentioned these
Water reducer have to carry out reacting by heating in preparation process so that reaction mass realizes ideal dispersive property, and best
Can accurately control reaction temperature, could realize ideal effect, this will necessarily cause the consumption of energy consumption, improves life
Produce cost；The temperature simultaneously heated is wayward, it is difficult to realize ideal water reducer effect.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of prior art, it is provided that one has without reacting by heating, and room temperature can realize subtracting
Water rate is high, and its dispersive property is excellent, and the water-reducing rate reducing energy consumption is high, the room temperature water reducer of excellent dispersion.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is: it is high that one has water-reducing rate, and dispersibility is excellent
Different room temperature water reducer, this water reducer is prepared from by each component of following percentage by weight:
The most each weight percentages of components sum is 100%.
As preferably, described has water-reducing rate height, and the room temperature water reducer of excellent dispersion, this water reducer is by following weight
Each component of percentage ratio is prepared from:
The most each weight percentages of components sum is 100%.
The consumption of self-control auxiliary component of the present invention and each composition is:
Acrylic acid: 10-20%
Ammonium persulfate.: 1-10%
Water: 70-80%.
The present invention also improves that a kind of above-mentioned to have water-reducing rate high, the preparation method of the room temperature water reducer of excellent dispersion, system
Standby step includes:
(1) each component raw material of formula proportion is weighed；
(2) then under normal temperature condition, the water of formula proportion half and methyl allyl polyoxyethylene ether and self-control are helped
Agent is in reaction vessel, it is not necessary to stirring, adds acrylic acid after placing 2-4 hour, and triethanolamine, ascorbic acid, formula proportion is another
The water of half, the adition process of above-mentioned material need to complete in 30 minutes；
(3) adding sheet alkali after being stirred 1.5-3 hour by the compound of step (2) gained, stirring i.e. to obtain having subtracts
Water rate is high, the room temperature water reducer of excellent dispersion.
Advantages of the present invention and beneficial effect:
1. the present invention uses and adds methyl allyl polyoxyethylene ether raw material in formula, adds homemade auxiliary agent simultaneously,
So that fully can dissolve with methyl allyl polyoxyethylene ether, reaction more fully, thoroughly, and is provided that more stable
The anion such as carboxyl and acidic group, these negative charges will interact with the positive charge of cement particle surface so that water reducer divides
The firm absorption of son forms one layer of electric double layer at cement particle surface, thus cement surface is with identical electric charge, inevitable that
Between this mutually exclusive, cement granules will spread out, and its flocculent structure skin is bad, the inside parcel free water molecule be released
Out participate in circulation, thus be effectively increased concrete mix and obtain mobility, thus effectively reduce the shrinkage cracking rate of concrete,
Postpone its damage speed of collapsing, and the advantage that the later stage can increase diminishing function.
2. each component of the present invention interacts, and uses suitable formula proportion and consumption, it is achieved that under normal temperature condition
It is high that reaction i.e. can get water-reducing rate, and its dispersive property is excellent, reduce energy consumption to have water-reducing rate high, excellent dispersion normal
Temperature water reducer.The invention employ ascorbic acid, can form stable slaine under sheet alkali effect, improve diminishing
The stability of agent.
3. the method for the present invention, by the strict order of addition controlling various materials and the time of interpolation, realizes effectively dropping
The shrinkage cracking rate of low concrete, postpones the effect of its damage speed of collapsing；Function of collapsing is protected especially with by having later stage increase
The mode of the polymer of polycarboxylic acids dropping by several times, the product further ensuring the present invention especially has its damage speed of collapsing of delay
Effect.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described in detail, but is not limited to this.
Embodiment 1
Proportioning raw materials:
Methyl allyl polyoxyethylene ether (TPEG) 30%, makes auxiliary agent 5%, acrylic acid 10%, triethanolamine 3% by oneself, resists
Bad hematic acid 3%, sheet alkali 4%, water 45%.
Self-control auxiliary agent: acrylic acid: 10%, Ammonium persulfate.: 10%, water: 80%.
Preparation process includes: by the water of formula proportion half and methyl allyl polyoxyethylene ether and self-control auxiliary agent in reaction
In container, it is not necessary to stirring, addition acrylic acid after placing 3 hours, triethanolamine, ascorbic acid, second half water of formula proportion, on
The adition process stating material need to complete in 30 minutes；Add sheet alkali after being stirred 2 hours by the compound of gained, stir i.e.
Obtain that there is water-reducing rate high, the room temperature water reducer of excellent dispersion.
Embodiment 2
Proportioning raw materials:
Methyl allyl polyoxyethylene ether (TPEG) 35%, makes auxiliary agent 2%, acrylic acid 12%, triethanolamine 2% by oneself, resists
Bad hematic acid 2%, sheet alkali 2%, water 45%.
Self-control auxiliary agent: acrylic acid 15%, Ammonium persulfate.: 8%, water 77%.
Preparation method is with embodiment 1.
Embodiment 3
Methyl allyl polyoxyethylene ether (TPEG) 40%, makes auxiliary agent 1%, acrylic acid 15%, triethanolamine 2% by oneself, resists
Bad hematic acid 1%, sheet alkali 1%, water 40%.
Self-control auxiliary agent: acrylic acid 20%, Ammonium persulfate.: 10%, water 70%.
Preparation method is with embodiment 1.
The performance detection of the water reducer of preparation
Concrete slump retaining ability
As a example by c30 concrete, proportioning such as table 1:
Table 1
Dispersibility and guarantor ability of collapsing specifically is shown in Table 2:
Table 2
Sample 1-3 is that (the corresponding embodiment 1 of sample 1, wherein water reducer addition is 0.2% to water reducer+embodiment 1-3, originally
The water reducer of invention replaces the water reducer of 15%)；Comparative example is simple water reducer (commercially available conventional polycarboxylate water-reducer)；From
Upper table is it can be seen that water reducer prepared by the interpolation present invention can effectively reduce the slump, it is achieved the effect that slow release collapses.
Concrete crushing strength is shown in Table 3
Table 3
Upper table adds the water reducer of the present invention, and concrete strength is not affected substantially, and slightly improves, and can effectively prevent
The slump reduces.
The water-reducing rate of embodiment 1-3 water reducer measures:
Test principle (1) water intaking is 142.5ml, puts into cement paste agitated kettle, adds 500g cement, by " cement
Consumptive use of water normal consistence stability setting time assay method " method of (GT31346-2001) carries out mix.(2) examination cone is measured
Submergence depth S.If submergence depth S is in the range of (28 soil 2) mm, water consumption now is exactly consumptive use of water normal consistence W,；Under if
Heavy depth S in the range of (28 soil 2) mm, should not calculate this denseness water consumption P1 according to formula P=33.4-0.185S.Use this
Denseness water consumption P1 × 500, so that it may draw consumptive use of water normal consistence W1.(3) additive recommended amounts is weighed.500g cement, adds water
With W, identical, if mix first mixes additive, (water reducer of the present invention) together should add with cement；According to backwater method, additive is stagnant
After in water, 1-3min adds.Again by " cement normal consistency water consumption stability setting time assay method " (GT31346-
2001) method carries out mix.(4) measure examination cone submergence depth S2 after having mixed, calculate P2.(5) admixtures water-reducing ratio WR ,=
((P ,-P2) 1P) x100, result is accurate to 0.1.
The water-reducing rate (with P.032.5 rating cement as example) of table 4 embodiment 1-3 water reducer
| Sample | Volume/% | Water-reducing rate |
| 1 | 2 | 25.2% |
| 2 | 2 | 26.1% |
| 3 | 2 | 22.05% |
The above embodiment of the present invention is the description of the invention and cannot be used for limiting the present invention, with the right of the present invention
Any change in implication that claim is suitable and scope, is all considered as being included within the scope of the claims.
Claims (3)
1. one kind has water-reducing rate height, the room temperature water reducer of excellent dispersion, it is characterised in that this water reducer is by following weight hundred
Each component of proportion by subtraction is prepared from:
Methyl allyl polyoxyethylene ether 30-40%
Self-control auxiliary agent 1-10%
Acrylic acid 10-20%
Triethanolamine 1-5%
Ascorbic acid 1-5%
Sheet alkali 1-5%
Water 40-60%, above each weight percentages of components sum is 100%；
Described self-control auxiliary component and consumption be:
Acrylic acid: 10-20%
Ammonium persulfate.: 1-10%
Water: 70-80%.
The most according to claim 1 have water-reducing rate height, the room temperature water reducer of excellent dispersion, it is characterised in that this subtracts
Water preparation is prepared from by each component of following percentage by weight:
Methyl allyl polyoxyethylene ether 32-38%
Self-control auxiliary agent 2-8%
Acrylic acid 12-18%
Triethanolamine 1-5%
Ascorbic acid 1-5%
Sheet alkali 1-5%
Water 45-58%, above each weight percentages of components sum is 100%.
The preparation method of the room temperature water reducer with water-reducing rate height, excellent dispersion the most according to claim 2, its feature
Being, preparation process includes:
(1) each component raw material of formula proportion is weighed；
(2) then under normal temperature condition, the water of formula proportion half and methyl allyl polyoxyethylene ether and self-control auxiliary agent are existed
In reaction vessel, it is not necessary to stirring, after placing 2-4 hour addition acrylic acid, triethanolamine, ascorbic acid, formula proportion second half
Water, the adition process of above-mentioned material need to complete in 30 minutes；
(3) add sheet alkali after being stirred 1.5-3 hour by the compound of step (2) gained, stir and i.e. obtain that there is water-reducing rate
Height, the room temperature water reducer of excellent dispersion.
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| CN101928114A (en) * | 2010-08-30 | 2010-12-29 | 大连建科北方化学有限公司 | High water reduction high collapse protection type polycarboxylate high-performance water reducer and pyrogen-free preparation method thereof |
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| CN101974135B (en) * | 2010-10-15 | 2013-03-06 | 北京工业大学 | Normal-temperature synthesis method for polycarboxylic acid water-reducing agent |
| CN102815882B (en) * | 2012-08-03 | 2014-02-19 | 山西科腾环保科技有限公司 | High-performance water reducer of polycarboxylic acid, and preparation method thereof |
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| CN101928114A (en) * | 2010-08-30 | 2010-12-29 | 大连建科北方化学有限公司 | High water reduction high collapse protection type polycarboxylate high-performance water reducer and pyrogen-free preparation method thereof |
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Inventor after: Wu Jiandong Inventor after: Xiao Yanfei Inventor after: Chen Dawei Inventor after: Zhou Youbin Inventor after: Zhou Jingping Inventor before: Wu Jiandong Inventor before: Zhou Yujun Inventor before: Xiao Yanfei Inventor before: Chen Dawei Inventor before: Zhou Youbin Inventor before: Zhou Jingping |