CN104496260A - 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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- CN104496260A CN104496260A CN201410672838.5A CN201410672838A CN104496260A CN 104496260 A CN104496260 A CN 104496260A CN 201410672838 A CN201410672838 A CN 201410672838A CN 104496260 A CN104496260 A CN 104496260A
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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, 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-cured concrete special additive in winter and production method.
Background technology
At present, rapidly, northern frore area is particularly suitable for the application of assembled architecture in assembled architecture development.And assembled architecture concrete prefabricated element all adopts steam-cured mode to produce substantially.When winter temperature is reduced to less than 0 DEG C, concrete prefabricated element after vapor cure when proceeding to outdoor stockyard and stacking, because temperature contrast is comparatively large, in concrete the reason such as residual water-content frost heave cause concrete member easily to occur crack, intensity and weather resistance reduce.In the assembled architecture winter production of severe cold area, this technical barrier in the urgent need to address, and to research and develop steam curing of concrete special additive in winter be an effective technological approaches.Being entitled as in " water reducer is on the impact of steam-curing concrete anti-freezing property " literary composition that the interim Guan Juan of concrete world magazine the 07th in 2011 etc. deliver is studied with regard to the impact of high efficiency water reducing agent on steam curing of concrete anti-freezing property such as poly carboxylic acid, naphthalene systems, but just relate to the steam curing of concrete fast freeze-thaw performance of the single water reducer of admixture in paper.Being entitled as in " different sorts admixture is on the impact of concrete steam-cured intensity " literary composition that concrete in 2012 and cement products magazine the 12nd phase Xiao Qian etc. deliver have studied the impact on concrete steam-cured intensity of high efficiency water reducing agent, hardening accelerator, air entrapment agent, swelling agent and retardant, but does not relate to the impact of admixture on steam-curing concrete winter production in paper.What concrete in 2014 and cement products magazine the 02nd phase Cao Yuan etc. delivered be entitled as in the paper of " experimental study that the amount of blended concrete antifreezing agent affects steam-curing concrete ultimate compression strength " have studied different frostproofer component and volume to the impact of steam-curing concrete ultimate compression strength in each length of time, but paper is only from the angle of antifreezing component, and only unilateral Effect of Anti Compressive Strength index.The patent No. of Tongji University Sun Zhen equality be 200410016581.4 " improving folding strength type road concrete admixture " patent be introduce a kind ofly to improve folding strength type road concrete admixture.Concrete flexural strength can be made to significantly improve, improve concrete durability, be applicable to steam-curing concrete etc., only stress to improve steam-curing concrete intensity, do not relate to winter production problem.Shandong Hongyi Technology Co., Ltd.'s Feng's grace is beautiful, Fu Xiuxin, Zhao Hongyi, the patent No. of Zhu Huayu be 2010101731472 " a kind of modified melamine high-efficiency water reducing agent with low cost " patent be a kind of in steam-curing concrete significant modified melamine high-efficiency water reducing agent with low cost of effect and preparation method thereof.It for main raw material with urea, trimeric cyanamide, formaldehyde, sodium bisulfite, Sodium Pyrosulfite, is aided with sodium hydroxide and sulfuric acid as pH adjusting agent, through certain production technique, prepares the melamine high-efficiency water-reducing agent of pale yellow transparent.Just single water reducer preparation, does not relate to solution steam-curing concrete winter production problem.The patent No. of the Liu Zhuping of Zhenjiang City Xinta Concrete Admixture Co., Ltd. be 201010278116.3 " concrete early strength and high effect water reduction agent " patent be about a kind of concrete early strength and high effect water reduction agent, formulated by AF, saltcake and coal ash.This admixture has the dual nature of early strength water-reducing agent and high efficiency water reducing agent, has certain short hard and air-entraining function, good to steam-cured adaptability, does not relate to steam-curing concrete winter production problem.The patent No. of the refined grade of Shanghai Zhongji Piles Co., Ltd Tang Sheng be 201210048405.3 " High-performance concrete organic-inorganic composite additive " patent also just describe High-performance concrete organic-inorganic composite additive, concrete density, weather resistance can be improved, and concrete can be made to obtain high early strength, be particularly suitable for the raising of steam-cured early strength, not relating to various component compound affects steam-curing concrete winter production.To be " a kind of improve the additive of steam-curing concrete weather resistance and adopt the concrete rough aggregate of this additive treating " patent of 201210381195.X be improves the additive of steam-curing concrete weather resistance and adopt the preparation and application method of concrete rough aggregate of this work treatment with improver for the patent No. of Jiangsu Botexin Materials Co., Ltd Miao Chang literary composition etc., for effective constituent with calcium hydroxide crystallization inhibitor and ettringite crystallization inhibitor, the weather resistance of steam-curing concrete is mainly improved by the mode of aggregate process, steam-curing concrete winter production problem of Cracking is not related to.In a word, existing achievement in research and paper are the research for steam-curing concrete diminishing, strength property and frost resistance aspect mostly, and almost do not have for suitable steam-curing concrete winter production crack resistence, guarantee later stage special additive that is low temperature hydrated, that improve weather resistance.Along with assembled architecture is in the extensive application of severe cold area, the raising of prefabricated steam curing of concrete component production capacity in winter, in the urgent need to researching and developing new steam curing of concrete special additive in winter, to solve the technical barrier of winter production.
Summary of the invention
The object of this invention is to provide a kind ofly can solve that severe cold area steam curing of concrete winter production is easy to crack, steam-cured concrete special additive in winter and production method that intensity and weather resistance reduce problem.
The present invention is achieved in that and it is characterized in that contained raw material and weight percent are:
Tai-Ace S 150 10% ~ 15%;
Citric acid 0.2% ~ 0.5%;
SODIUMNITRATE 4% ~ 7%;
Methylcellulose gum 0.1% ~ 0.2%;
20% solid content polycarboxylate water-reducer 25% ~ 30%;
Water 47.3% ~ 60.7%.
Its preparation method is: first add in mixer by water; then in proportion Tai-Ace S 150, citric acid, SODIUMNITRATE are added in mixer; stir and substantially dissolve to solid particulate for 20 ~ 30 minutes; in proportion methyl cellulose ether, polycarboxylate water-reducer are put into mixer again; stir and dissolve completely to solid particulate for 20 ~ 30 minutes, product is colourless transparent liquid.
The using method of this steam curing of concrete special additive in winter is according to winter environment temperature variation, adjustment steam curing of concrete special additive in winter proportioning and volume, when Daily minimum temperature is 0 DEG C ~-5 DEG C, Tai-Ace S 150 weight percent is 13% ~ 15%, citric acid weight percent is 0.4% ~ 0.5%, SODIUMNITRATE weight percent is 4% ~ 5%, methylcellulose gum weight percent is 0.1%, 20% solid content polycarboxylate water-reducer aqua weight percent can adjust according to cement type, and admixture dosage is 2.0% ~ 2.4% of gelling material gross weight; When Daily minimum temperature is-5 DEG C ~-10 DEG C, Tai-Ace S 150 weight percent is 11% ~ 13%, citric acid weight percent is 0.3% ~ 0.4%, SODIUMNITRATE weight percent is 5% ~ 6%, methylcellulose gum weight percent is 0.1%, 20% solid content polycarboxylate water-reducer aqua weight percent can adjust according to cement type, and admixture dosage is 2.4% ~ 2.8% of gelling material gross weight; When Daily minimum temperature is less than-10 DEG C, Tai-Ace S 150 weight percent is 10% ~ 12%, citric acid weight percent is 0.2% ~ 0.3%, SODIUMNITRATE weight percent is 6% ~ 7%, methylcellulose gum weight percent is 0.2%, 20% solid content polycarboxylate water-reducer aqua weight percent can adjust according to cement type, and admixture dosage is 2.8% ~ 3.2% of gelling material gross weight.
Advantage of the present invention is the technical problem that, intensity easy to crack for severe cold area steam curing of concrete winter production and weather resistance reduce, adopt the mode that diminishing component, crack resistence component, antifreezing component, water-retaining component are composite, can environmentally temperature variation, adjustment proportioning raw materials and volume, ensure the normal production of minimum temperature less than 0 DEG C steam curing of concrete.Use this steam curing of concrete special additive in winter, the concrete amount that moisture moves through pore in vapor cure process can be made to reduce, and then reduce the expansion of inner microfracture; After type concrete steam maintenance is terminated, shrink in temperature-fall period and compensated, reduce the tearing tendency caused by the temperature difference.Meanwhile, after steam curing of concrete proceeds to stockyard, under subzero temperature environment, still ensure the quantity of interior liquid water, thus meet the further aquation of gelling material, and reduce the swollen harm caused of ice, guarantee the benign development of concrete strength and higher weather resistance.The present invention is nontoxic, low alkalinity, and environment friendly is better.
Embodiment
Embodiment 1
Get Tai-Ace S 150 100Kg, citric acid 4Kg, SODIUMNITRATE 50Kg, methyl cellulose ether 2Kg, polycarboxylate water-reducer 25Kg, water 500Kg are for subsequent use; first water is added in mixer in proportion; then in proportion Tai-Ace S 150, citric acid, SODIUMNITRATE are added in mixer; stir and substantially dissolve to solid particulate for 20 ~ 30 minutes; in proportion methyl cellulose ether, polycarboxylate water-reducer are put into mixer again; stir and dissolve completely to solid particulate for 20 ~ 30 minutes, product is colourless transparent liquid.
Embodiment 2
Get Tai-Ace S 150 150Kg, citric acid 5Kg, SODIUMNITRATE 60Kg, methyl cellulose ether 1Kg, polycarboxylate water-reducer 20Kg, water 600Kg are for subsequent use; first water is added in mixer in proportion; then in proportion Tai-Ace S 150, citric acid, SODIUMNITRATE are added in mixer; stir and substantially dissolve to solid particulate for 20 ~ 30 minutes; in proportion methyl cellulose ether, polycarboxylate water-reducer are put into mixer again; stir and dissolve completely to solid particulate for 20 ~ 30 minutes, product is colourless transparent liquid.
Embodiment 3
Get Tai-Ace S 150 120Kg, citric acid 2Kg, SODIUMNITRATE 40Kg, methyl cellulose ether 2Kg, polycarboxylate water-reducer 30Kg, water 480Kg are for subsequent use; first water is added in mixer in proportion; then in proportion Tai-Ace S 150, citric acid, SODIUMNITRATE are added in mixer; stir and substantially dissolve to solid particulate for 20 ~ 30 minutes; in proportion methyl cellulose ether, polycarboxylate water-reducer are put into mixer again; stir and dissolve completely to solid particulate for 20 ~ 30 minutes, product is colourless transparent liquid.
Claims (4)
1. a steam-cured concrete special additive in winter, is characterized in that contained raw material and weight percent are:
Tai-Ace S 150 10% ~ 15%;
Citric acid 0.2% ~ 0.5%;
SODIUMNITRATE 4% ~ 7%;
Methylcellulose gum 0.1% ~ 0.2%;
20% solid content polycarboxylate water-reducer 25% ~ 30%;
Water 47.3% ~ 60.7%.
2. Ju steam-cured concrete according to claim 1 special additive in winter; it is characterized in that: its preparation method first adds in mixer by water in proportion; then in proportion Tai-Ace S 150, citric acid, SODIUMNITRATE are added in mixer; stir and substantially dissolve to solid particulate for 20 ~ 30 minutes; in proportion methyl cellulose ether, polycarboxylate water-reducer are put into mixer again; stir and dissolve completely to solid particulate for 20 ~ 30 minutes, product is colourless transparent liquid.
3. Ju steam-cured concrete according to claim 1 special additive in winter, it is characterized in that: the using method of this steam curing of concrete special additive in winter is, according to winter environment temperature variation, adjustment steam curing of concrete special additive in winter proportioning and volume, when Daily minimum temperature is 0 DEG C ~-5 DEG C, Tai-Ace S 150 weight percent is 13% ~ 15%, citric acid weight percent is 0.4% ~ 0.5%, SODIUMNITRATE weight percent is 4% ~ 5%, methylcellulose gum weight percent is 0.1%, 20% solid content polycarboxylate water-reducer aqua weight percent can adjust according to cement type, admixture dosage is 2.0% ~ 2.4% of gelling material gross weight.
4. Ju steam-cured concrete according to claim 1 special additive in winter, it is characterized in that: the using method of this steam curing of concrete special additive in winter is, when Daily minimum temperature is-5 DEG C ~-10 DEG C, Tai-Ace S 150 weight percent is 11% ~ 13%, citric acid weight percent is 0.3% ~ 0.4%, SODIUMNITRATE weight percent is 5% ~ 6%, methylcellulose gum weight percent is 0.1%, 20% solid content polycarboxylate water-reducer aqua weight percent can adjust according to cement type, and admixture dosage is 2.4% ~ 2.8% of gelling material gross weight; When Daily minimum temperature is less than-10 DEG C, Tai-Ace S 150 weight percent is 10% ~ 12%, citric acid weight percent is 0.2% ~ 0.3%, SODIUMNITRATE weight percent is 6% ~ 7%, methylcellulose gum weight percent is 0.2%, 20% solid content polycarboxylate water-reducer aqua weight percent can adjust according to cement type, and admixture dosage is 2.8% ~ 3.2% of gelling material gross weight.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| 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 true CN104496260A (en) | 2015-04-08 |
| CN104496260B CN104496260B (en) | 2017-05-24 |
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| CN201410672838.5A Expired - Fee Related 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108947390A (en) * | 2018-07-26 | 2018-12-07 | 中水电第十工程局（郑州）有限公司 | A kind of extremely frigid zones side slope bolt-spary supports heat insulating construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5176753A (en) * | 1986-09-19 | 1993-01-05 | Brook John W | Concrete admixture compositions |
| 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 |
-
2014
- 2014-11-23 CN CN201410672838.5A patent/CN104496260B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5176753A (en) * | 1986-09-19 | 1993-01-05 | Brook John W | Concrete admixture compositions |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108947390A (en) * | 2018-07-26 | 2018-12-07 | 中水电第十工程局（郑州）有限公司 | A kind of extremely frigid zones side slope bolt-spary supports heat insulating construction method |
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| CN104496260B (en) | 2017-05-24 |
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Granted publication date: 20170524 Termination date: 20181123 |