CN102206059A - Early strength exciting agent for foamed concrete and preparation method thereof - Google Patents
Early strength exciting agent for foamed concrete and preparation method thereof Download PDFInfo
- Publication number
- CN102206059A CN102206059A CN 201110074656 CN201110074656A CN102206059A CN 102206059 A CN102206059 A CN 102206059A CN 201110074656 CN201110074656 CN 201110074656 CN 201110074656 A CN201110074656 A CN 201110074656A CN 102206059 A CN102206059 A CN 102206059A
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- CN
- China
- Prior art keywords
- foamed concrete
- rapid hardening
- preparation
- excitant
- early strength
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Classifications
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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
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
Abstract
The invention relates to an early strength exciting agent for foamed concrete and the preparation method thereof, wherein the early strength exciting agent for foamed concrete comprises 1.8 wt% of triethanolamine, 38 wt% of sodium sulphate, 3.4 wt% of soluble glass, 3.4 wt% of formaldehyde at a concentration of 37%; 3.4 wt% of urea, enough limewater, 17 wt% of calcium lignin sulphonate, and 33 wt% of a naphthalene-based superplasticizer. Additives in an adjusted alkaline environment are combined according to the weight percent with the early strength exciting agent produced according to the above proportion. The preparation method provided by the invention can minimize the water consumption by 14-16% and raise the strength of foamed concrete by 60% in 2 days, substantially shortens the demoulding period, increases the compressive strength, and reduces production cost; and it is verified through practice that the preparation method provided by the invention is advanced and practical.
Description
Technical field
The invention belongs to building material field, particularly a kind of rapid hardening excitant that is used for foamed concrete and preparation method thereof.
Background technology
How in the winter time or adopt during rush repair concrete early strength agent is meant the admixture that can improve early age strength of concrete.Concrete early strength agent is to late strength of concrete and do not make significant difference.Diminishing excitant is a kind of polymer active material, and it has the activated effect to the molecule chain reaction of high efficiency water reducing agent.Can strengthen the adaptability of water reducer behind general and naphthalene water reducer, sulfamate water reducer, melamine class water reducer, aliphatic water reducing agent, the polycarboxylate dehydragent compatibility to cement, the raising water-reducing rate, model retention effect is obvious.Along with the implementation of national energy-saving and emission-reduction policy, forbid the production and the use of " two reality " brick, the novel wall material of a kind of excellent property, energy-conserving and environment-protective---foamed concrete is fast-developing, certainly will get for " two reality " brick.At present, mixing rapid hardening excitant in the foamed concrete production process of domestic various places all is concrete rapid hardening excitant commonly used, can not satisfy the performance requriements of foamed concrete.We prove by research trial, the acid base concentration of control rapid hardening excitant, accurately grasp the abundant reaction of various chemical ingredientss, appropriate compound proportioning, better use free sodium ion, can obtain every performance index of foamed concrete better.
Summary of the invention
The technical problem to be solved in the present invention provides and a kind ofly can reduce water cement ratio, excites flyash activity, and what increase early strength is exclusively used in rapid hardening excitant of foamed concrete and preparation method thereof.
A kind of rapid hardening excitant that is used for foamed concrete, the composition and the weight percent of this foamed concrete rapid hardening excitant are respectively:
Trolamine 1.8% sodium sulfate 38% water glass 3.4%
Formaldehyde (37%) 3.4% urea 3.4% liming is enough
Calcium lignin sulphonate 17% naphthalene series high-efficiency water-reducing agent 33%
The concrete preparation steps of the special-purpose rapid hardening excitant of this foamed concrete is:
A) amount by weight percentage: trolamine 1.8%, sodium sulfate 38%, water glass 3.4%, urea 3.4%, put into reactor, be heated to 120 ℃, stirring reaction 1 hour, temperature is reduced to 80 ℃, add formaldehyde solution (37%) 3.4% gradually, continued stirring reaction 1 hour, after temperature is reduced to 25 ℃, with enough alkali lye its pH value is adjusted between 7～10, promptly makes rapid hardening excitant;
B) by weight percentage with the rapid hardening excitant 50% for preparing, naphthalene series high-efficiency water-reducing agent 33%, calcium lignin sulphonate 17% mixes and stirs under 25 ℃ of temperature, its pH value is adjusted between 8.5～10 cooling encapsulation then with enough alkali lye.
The special-purpose recombiner that early excites by force of the foamed concrete that the present invention proposes, with whipping agent under the prerequisite that chemical reaction does not take place, can reduce water cement ratio, excite flyash activity, increase early strength, shorten the demoulding cycle, enhance productivity, reduce production costs.
Embodiment
The composition and the weight percent of the special-purpose rapid hardening excitant of the foamed concrete that the present invention proposes are respectively:
Trolamine 1.8% sodium sulfate 38% water glass 3.4%
Formaldehyde (37%) 3.4% urea 3.4% liming is enough
Calcium lignin sulphonate 17% naphthalene series high-efficiency water-reducing agent 33%
The concrete preparation steps of the special-purpose rapid hardening excitant of foamed concrete of the present invention:
A) amount by weight percentage: trolamine 1.8%, sodium sulfate 38%, water glass 3.4%, urea 3.4%, put into reactor, be heated to 120 ℃, stirring reaction 1 hour, temperature is reduced to 80 ℃, add formaldehyde solution (37%) 3.4% gradually, continued stirring reaction 1 hour, after temperature is reduced to 25 ℃, with enough alkali lye its pH value is adjusted between 7～10, promptly makes rapid hardening excitant;
B) by weight percentage with the rapid hardening excitant 50% for preparing, naphthalene series high-efficiency water-reducing agent 33%, calcium lignin sulphonate 17% mixes and stirs under 25 ℃ of temperature, its pH value is adjusted between 8.5～10 cooling encapsulation then with enough alkali lye.
The present invention is in preparation process, and the alkali environment is with Ca (OH)
2Control rather than use NaOH; Na
2SO
4Manipulated variable surpassed traditional 5% and can reach 25%; Effectively use free sodium ion, be convenient to pumping.
Using method: be useful for foamed concrete, volume is the 0.5-1% of cement consumption;
Effect analysis: (1) can reduce water 16-18%,
Intensity can improve 60% in (2) two days, and later strength increases on year-on-year basis.
(3) make great efforts to create flyash and " eat and subtract mineralising " environment, excite SiO in the main admixture flyash of foamed concrete
2Activity, make full use of the character of free Na+ again, make pumping more convenient.
In the foamed concrete production process, add rapid hardening excitant, can improve the multinomial performance of product, mainly show:
1, reduces water cement ratio, reduce the slump;
2, improve early strength, shorten the demoulding cycle;
3, create good alkalization environment, excite flyash activity;
The special-purpose rapid hardening excitant of foamed concrete of the present invention is after putting admixture in order the alkali environment, and is compound by weight percentage, can reduce water 14-16%, intensity improved 60% in 2 days, shortened the demoulding cycle greatly, increase ultimate compression strength, reduce production costs, have advance and practicality through facts have proved.
Claims (2)
1. rapid hardening excitant that is used for foamed concrete, it is characterized in that: the composition and the weight percent of described foamed concrete rapid hardening excitant are respectively:
Trolamine 1.8% sodium sulfate 38% water glass 3.4%
Formaldehyde (37%) 3.4% urea 3.4% liming is enough
Calcium lignin sulphonate 17% naphthalene series high-efficiency water-reducing agent 33%.
2. the preparation method of rapid hardening excitant according to claim 1, it is characterized in that: the concrete preparation steps of described rapid hardening excitant is:
A) amount by weight percentage: trolamine 1.8%, sodium sulfate 38%, water glass 3.4%, urea 3.4%, put into reactor, be heated to 120 ℃, stirring reaction 1 hour, temperature is reduced to 80 ℃, add formaldehyde solution (37%) 3.4% gradually, continued stirring reaction 1 hour, after temperature is reduced to 25 ℃, with enough liming its pH value is adjusted between 7～10, promptly makes rapid hardening excitant;
B) by weight percentage with the rapid hardening excitant 50% for preparing, naphthalene series high-efficiency water-reducing agent 33%, calcium lignin sulphonate 17% mixes and stirs under 25 ℃ of temperature, its pH value is adjusted between 8.5～10 cooling encapsulation then with enough liming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110074656 CN102206059A (en) | 2011-03-28 | 2011-03-28 | Early strength exciting agent for foamed concrete and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110074656 CN102206059A (en) | 2011-03-28 | 2011-03-28 | Early strength exciting agent for foamed concrete and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102206059A true CN102206059A (en) | 2011-10-05 |
Family
ID=44695161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110074656 Pending CN102206059A (en) | 2011-03-28 | 2011-03-28 | Early strength exciting agent for foamed concrete and preparation method thereof |
Country Status (1)
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| CN (1) | CN102206059A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011662A (en) * | 2012-12-14 | 2013-04-03 | 桂林华越环保科技有限公司 | Alkali-activated high-performance water reducer and preparation method thereof |
| CN104591621A (en) * | 2015-01-06 | 2015-05-06 | 安徽省无为县泉塘预制厂 | Concrete special for cement pipe |
| CN110272224A (en) * | 2019-06-21 | 2019-09-24 | 游雪花 | A kind of high-effective concrete exciting agent |
-
2011
- 2011-03-28 CN CN 201110074656 patent/CN102206059A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011662A (en) * | 2012-12-14 | 2013-04-03 | 桂林华越环保科技有限公司 | Alkali-activated high-performance water reducer and preparation method thereof |
| CN103011662B (en) * | 2012-12-14 | 2014-07-02 | 桂林华越环保科技有限公司 | Alkali-activated high-performance water reducer and preparation method thereof |
| CN104591621A (en) * | 2015-01-06 | 2015-05-06 | 安徽省无为县泉塘预制厂 | Concrete special for cement pipe |
| CN110272224A (en) * | 2019-06-21 | 2019-09-24 | 游雪花 | A kind of high-effective concrete exciting agent |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111005 |