CN104496260B - Special additive for steam curing of concrete in winter and production method thereof - Google Patents
Special additive for steam curing of concrete in winter and production method thereof Download PDFInfo
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- CN104496260B CN104496260B CN201410672838.5A CN201410672838A CN104496260B CN 104496260 B CN104496260 B CN 104496260B CN 201410672838 A CN201410672838 A CN 201410672838A CN 104496260 B CN104496260 B CN 104496260B
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Abstract
A special additive for steam curing of concrete in winter and a production method thereof. The additive is characterized by comprising the following raw materials by weight: 10%-15% of aluminum sulfate, 0.2%-0.5% of citric acid, 4%-7% of sodium nitrate, 0.1%-0.2% of methyl cellulose ether, 25%-30% of a poly carboxylic acid water reducing agent with solid content of 20% and 47.3%-60.7% of water. The preparation method is as below: first adding water in a feed mixer; then adding aluminum sulfate, citric acid and sodium nitrate according to the proportion into the feed mixer, and stirring for 20-30 min to practically dissolve solid particles; then adding the methyl cellulose and the poly carboxylic acid water reducing agent according to the proportion into the feed mixer, and stirring for 20-30 min until to practically dissolve solid particles, so as to obtain a colorless transparent liquid product. The invention has the advantage that aiming at the problems of easy cracking and reduced strength and durability in steam curing of concrete in winter in severe cold areas, a multiple-ingredient compounding way is employed, and the ratio of raw materials and dosage can be adjusted according to the change of environmental temperature, so as to ensure the normal production of steam curing of concrete under the minimum temperature of below 0 DEG C and to ensure strength and durability of the concrete. The invention has good environment-friendliness.
Description
Technical field
The present invention relates to technical field of concrete, particularly a kind of steam curing of concrete winter special additive and production
Method.
Background technology
At present, assembled architecture quickly grows, and northern frore area is particularly suitable for the application of assembled architecture.And assembled
Build concrete prefabricated components are substantially all and are produced using steam-cured mode.When winter temperature is reduced to less than 0 DEG C, warp
Concrete prefabricated element after steam curing is remaining because temperature difference is larger, in concrete when being transferred to outdoor stockyard and stacking
The reasons such as moisture frost heave cause concrete component the reduction of crack, intensity and durability easily occur.In the assembled of severe cold area
In building winter production, this technical barrier in the urgent need to address, and researching and developing steam curing of concrete winter special additive is
One effective technological approaches.The concrete world the 07th interim pipe of magazine in 2011 is beautiful etc. deliver it is entitled《Water reducer is to steam-cured
The influence of concrete antifreezing performance》With regard to high efficiency water reducing agents such as polycarboxylic acids, naphthalene systems to steam curing of concrete anti-freezing property in one text
Influence studied, but simply relate to fill the steam curing of concrete fast freeze-thaw of single water reducer in paper
Energy.It is entitled that concrete in 2012 and the phase Xiao Qian of cement products magazine the 12nd etc. are delivered《Variety classes additive is to concrete steam
Support the influence of intensity》High efficiency water reducing agent, early strength agent, air entraining agent, swelling agent and retarder are have studied in one text to concrete steam-cured
The influence of intensity, but the influence in paper without reference to additive to steam-curing concrete winter production.Concrete in 2014 and water
It is entitled that phase Cao Yuan of mud product magazine the 02nd etc. is delivered《The amount of blended concrete antifreezing agent grinds on the experiment that steam-curing concrete compression strength influences
Study carefully》Paper in have studied the influence of different antifreezing agent components and volume to each age compression strength of steam-curing concrete, but paper
Only from the angle of antifreezing component, and only unilateral one index of research compression strength.Tongji University's Sun Zhen equalitys it is special
Profit number is 200410016581.4《Improve rupture strength type road concrete additive》Patent is to introduce a kind of anti-folding of raising
Intensity type road concrete additive.Can significantly improve concrete flexural strength, improve concrete durability, it is adaptable to steam-cured
Concrete etc., only stresses to improve steam-curing concrete intensity, without reference to winter production problem.The grand skill science and technology limited public affairs of share in Shandong
Si Fengen is beautiful, Fu Xiuxin, Zhao Hongyi, the Patent No. 2010101731472 of Zhu Huayu《A kind of low-cost modified trimerization
Cyanamide high efficiency water reducing agent》Patent is that one kind significant low-cost modified melamine high-efficiency of the application effect in steam-curing concrete subtracts
Aqua and preparation method thereof.It is aided with urea, melamine, formaldehyde, sodium hydrogensulfite, sodium pyrosulfite as primary raw material
NaOH and sulfuric acid, through certain production technology, prepare the melamine high-efficiency water-reducing agent of pale yellow transparent as pH adjusting agent.
It is prepared by simply single water reducer, to solve the problems, such as steam-curing concrete winter production without reference to.Outside the prosperous tower concrete in Zhengjiang City
Plus the Patent No. 201010278116.3 of the Liu Zhuping of agent Co., Ltd《Concrete early strength and high effect water reduction agent》Patent is to close
In a kind of concrete early strength and high effect water reduction agent, it is formulated by AF, saltcake and coal ash.The additive has early strength water-reducing agent and height
The double grading of water reducer is imitated, has certain rush hard and air-entraining function, it is good to steam-cured adaptability, to steam-curing concrete winter production
Problem without reference to.The Patent No. 201210048405.3 of the refined grades of Shanghai Zhongji Piles Co., Ltd Tang Sheng《Gao Xing
Can concrete organic-inorganic composite additive》Patent also simply describes High-performance concrete organic-inorganic composite additive, can
To improve concrete density, durability, and concrete can be made to obtain early strength high, be particularly suitable for steam-cured early strength
Improve, steam-curing concrete winter production is influenceed without reference to various components are compound.Jiangsu Botexin Materials Co., Ltd Miao Chang
The Patent No. 201210381195.X's of text etc.《It is a kind of improve steam-curing concrete durability additive and use the addition
The concrete rough aggregate of agent treatment》Patent is to improve the additive of steam-curing concrete durability and use the work treatment with improver
The preparation and application method of concrete rough aggregate, be with calcium hydroxide crystallization inhibitor and entringite crystallization inhibitor as effectively into
Point, the durability of steam-curing concrete is mainly improved by way of aggregate treatment, steam-curing concrete winter production cracking is asked
Topic without reference to.In a word, existing achievement in research and paper are directed to steam-curing concrete diminishing, strength character and frost resistance mostly
The research of aspect, and it is low temperature hydrated, raising durability special for suitable steam-curing concrete winter production crack resistence, guarantee later stage
Almost do not have with additive.As assembled architecture is in the extensive application of severe cold area, prefabricated steam curing of concrete component winter
Season production capacity raising, in the urgent need to researching and developing new steam curing of concrete winter special additive, to solve the skill of winter production
Art problem.
The content of the invention
Can solve the problem that severe cold area steam curing of concrete winter production is easy to crack, strong it is an object of the invention to provide one kind
The steam curing of concrete winter special additive and production method of degree and durability reduction problem.
The present invention is achieved in that it is characterized in that contained raw material and percentage by weight are：
Aluminum sulfate 10% ~ 15%；
Citric acid 0.2% ~ 0.5%；
Sodium nitrate 4% ~ 7%；
Methyl cellulose ether 0.1% ~ 0.2%；
20% solid content polycarboxylate water-reducer 25% ~ 30%；
Water 47.3% ~ 60.7%.
Its preparation method is：First add water in batch mixer, then in proportion add aluminum sulfate, citric acid, sodium nitrate
In batch mixer, stirring is dissolved to solid particle for 20 ~ 30 minutes substantially, then in proportion by methyl cellulose ether, polycarboxylate water-reducer
It is put into batch mixer, stirring is completely dissolved for 20 ~ 30 minutes to solid particle, and product is colourless transparent liquid.
The application method of the steam curing of concrete winter special additive is that, according to winter environment temperature change, adjustment is steamed
Vapour curing concrete winter special additive is matched and volume, when Daily minimum temperature is 0 DEG C ~ -5 DEG C, aluminum sulfate percentage by weight
It is 13% ~ 15%, citric acid percentage by weight is 0.4% ~ 0.5%, sodium nitrate percentage by weight is 4% ~ 5%, methyl cellulose ether weight
Amount percentage is 0.1%, and 20% solid content polycarboxylate water-reducer percentage by weight can be adjusted according to cement type, and admixture dosage is
The 2.0% ~ 2.4% of Binder Materials gross weight；When Daily minimum temperature is -5 DEG C ~ -10 DEG C, aluminum sulfate percentage by weight is 11% ~ 13%,
Citric acid percentage by weight is 0.3% ~ 0.4%, and sodium nitrate percentage by weight is 5% ~ 6%, and methyl cellulose ether percentage by weight is
0.1%, 20% solid content polycarboxylate water-reducer percentage by weight can be adjusted according to cement type, and admixture dosage is that Binder Materials is total
The 2.4% ~ 2.8% of weight；When Daily minimum temperature is less than -10 DEG C, aluminum sulfate percentage by weight is 10% ~ 12%, citric acid weight
Percentage is 0.2% ~ 0.3%, and sodium nitrate percentage by weight is 6% ~ 7%, and methyl cellulose ether percentage by weight is 0.2%, and 20% consolidates
Content polycarboxylate water-reducer percentage by weight can be adjusted according to cement type, and admixture dosage is the 2.8% of Binder Materials gross weight
~3.2%。
It is an advantage of the invention that being directed to severe cold area steam curing of concrete winter production easy to crack, intensity and durability drop
Low technical problem, by the way of diminishing component, crack resistence component, antifreezing component, water-retaining component compounding, can be according to environment temperature
Degree change, adjusts raw material proportioning and volume, it is ensured that the normal production of steam curing of concrete below 0 DEG C of minimum temperature.Using this
Steam curing of concrete winter special additive, can be such that concrete moisture during steam curing is dropped through the amount that pore is migrated
It is low, and then reduce the expansion of internal microcrack；After terminating type concrete steam maintenance, shunk in temperature-fall period and be compensated for,
The tearing tendency that reduction is caused by the temperature difference.Meanwhile, after steam curing of concrete is transferred to stockyard, still ensure interior under subzero temperature environment
The quantity of portion's aqueous water, so as to meet the further aquation of Binder Materials, and reduces the swollen harm for causing of ice, it is ensured that strong concrete
The benign development of degree and durability higher.The present invention is nontoxic, and low alkalinity, environment friendly is preferable.
Specific embodiment
Embodiment 1
Take aluminum sulfate 100Kg, citric acid 4Kg, sodium nitrate 50Kg, methyl cellulose ether 2Kg, polycarboxylate water-reducer 25Kg,
Water 500Kg is standby, first adds water in proportion in batch mixer, and aluminum sulfate, citric acid, sodium nitrate then are added into batch mixing in proportion
In machine, stirring is dissolved to solid particle for 20 ~ 30 minutes substantially, then is in proportion put into methyl cellulose ether, polycarboxylate water-reducer
In batch mixer, stirring is completely dissolved for 20 ~ 30 minutes to solid particle, and product is colourless transparent liquid.
Embodiment 2
Take aluminum sulfate 150Kg, citric acid 5Kg, sodium nitrate 60Kg, methyl cellulose ether 1Kg, polycarboxylate water-reducer 20Kg,
Water 600Kg is standby, first adds water in proportion in batch mixer, and aluminum sulfate, citric acid, sodium nitrate then are added into batch mixing in proportion
In machine, stirring is dissolved to solid particle for 20 ~ 30 minutes substantially, then is in proportion put into methyl cellulose ether, polycarboxylate water-reducer
In batch mixer, stirring is completely dissolved for 20 ~ 30 minutes to solid particle, and product is colourless transparent liquid.
Embodiment 3
Take aluminum sulfate 120Kg, citric acid 2Kg, sodium nitrate 40Kg, methyl cellulose ether 2Kg, polycarboxylate water-reducer 30Kg,
Water 480Kg is standby, first adds water in proportion in batch mixer, and aluminum sulfate, citric acid, sodium nitrate then are added into batch mixing in proportion
In machine, stirring is dissolved to solid particle for 20 ~ 30 minutes substantially, then is in proportion put into methyl cellulose ether, polycarboxylate water-reducer
In batch mixer, stirring is completely dissolved for 20 ~ 30 minutes to solid particle, and product is colourless transparent liquid.
Claims (4)
1. a kind of steam curing of concrete winter special additive, it is characterised in that contained raw material and percentage by weight are：
Aluminum sulfate 10% ~ 15%；
Citric acid 0.2% ~ 0.5%；
Sodium nitrate 4% ~ 7%；
Methyl cellulose ether 0.1% ~ 0.2%；
20% solid content polycarboxylate water-reducer 25% ~ 30%；
Water 47.3% ~ 60.7%.
2. the steam curing of concrete winter special additive described in a Ju claim 1, it is characterized in that：Its preparation method be by
Ratio is first added water in batch mixer, then stirs 20 ~ 30 by aluminum sulfate, citric acid, sodium nitrate addition batch mixer in proportion
Minute dissolve substantially to solid particle, then methyl cellulose ether, polycarboxylate water-reducer be put into batch mixer in proportion, stirring 20
It is completely dissolved to solid particle within ~ 30 minutes, product is colourless transparent liquid.
3. the steam curing of concrete winter special additive described in a Ju claim 1, it is characterized in that：The steam curing coagulation
The application method of native winter special additive is that, according to winter environment temperature change, adjustment steam curing of concrete winter is special
Ratio of additive and volume, when Daily minimum temperature is 0 DEG C ~ -5 DEG C, aluminum sulfate percentage by weight is 13% ~ 15%, citric acid weight
Percentage is 0.4% ~ 0.5%, and sodium nitrate percentage by weight is 4% ~ 5%, and methyl cellulose ether percentage by weight is 0.1%, and 20% consolidates
Content polycarboxylate water-reducer percentage by weight can be adjusted according to cement type, and admixture dosage is the 2.0% of Binder Materials gross weight
~2.4%。
4. the steam curing of concrete winter special additive described in a Ju claim 1, it is characterized in that：The steam curing coagulation
The application method of native winter special additive is, when Daily minimum temperature is -5 DEG C ~ -10 DEG C, aluminum sulfate percentage by weight is 11% ~
13%, citric acid percentage by weight is 0.3% ~ 0.4%, and sodium nitrate percentage by weight is 5% ~ 6%, methyl cellulose ether weight percent
Than being 0.1%, 20% solid content polycarboxylate water-reducer percentage by weight can be adjusted according to cement type, and admixture dosage is gelling material
The 2.4% ~ 2.8% of material gross weight；When Daily minimum temperature is less than -10 DEG C, aluminum sulfate percentage by weight is 10% ~ 12%, citric acid
Percentage by weight is 0.2% ~ 0.3%, and sodium nitrate percentage by weight is 6% ~ 7%, and methyl cellulose ether percentage by weight is 0.2%,
20% solid content polycarboxylate water-reducer percentage by weight can be adjusted according to cement type, and admixture dosage is Binder Materials gross weight
2.8% ~ 3.2%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410672838.5A CN104496260B (en) | 2014-11-23 | 2014-11-23 | Special additive for steam curing of concrete in winter and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410672838.5A CN104496260B (en) | 2014-11-23 | 2014-11-23 | Special additive for steam curing of concrete in winter and production method thereof |
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| CN104496260A CN104496260A (en) | 2015-04-08 |
| CN104496260B true CN104496260B (en) | 2017-05-24 |
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| CN106365495A (en) * | 2016-08-31 | 2017-02-01 | 嘉兴禾基新型建材有限公司 | Additive special for steam curing of precast concrete member and preparation method and application thereof |
| CN108947390B (en) * | 2018-07-26 | 2021-02-26 | 中电建十一局工程有限公司 | Anchor-shotcreting support heat-preservation construction method for side slope in alpine region |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1559966A (en) * | 2004-02-26 | 2005-01-05 | 同济大学 | Addition for concrete of road for enhacing anti-bending strength |
| CN102276218A (en) * | 2011-05-20 | 2011-12-14 | 中国铁道科学研究院铁道建筑研究所 | Low negative temperature post-tensioned beam prestress pipeline mudjacking material |
| CN103396057A (en) * | 2013-07-26 | 2013-11-20 | 太原理工大学 | Prestressed pore pressure slurry and grouting method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5176753A (en) * | 1986-09-19 | 1993-01-05 | Brook John W | Concrete admixture compositions |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1559966A (en) * | 2004-02-26 | 2005-01-05 | 同济大学 | Addition for concrete of road for enhacing anti-bending strength |
| CN102276218A (en) * | 2011-05-20 | 2011-12-14 | 中国铁道科学研究院铁道建筑研究所 | Low negative temperature post-tensioned beam prestress pipeline mudjacking material |
| CN103396057A (en) * | 2013-07-26 | 2013-11-20 | 太原理工大学 | Prestressed pore pressure slurry and grouting method thereof |
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Granted publication date: 20170524 Termination date: 20181123 |