CN103739230A - Preparation method of retarding and water reducing agent - Google Patents
Preparation method of retarding and water reducing agent Download PDFInfo
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- CN103739230A CN103739230A CN201310702540.XA CN201310702540A CN103739230A CN 103739230 A CN103739230 A CN 103739230A CN 201310702540 A CN201310702540 A CN 201310702540A CN 103739230 A CN103739230 A CN 103739230A
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- sweet potato
- potato starch
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Abstract
The invention discloses a preparation method of a retarding and water reducing agent. The preparation method comprises the following steps: 1) oxidization: oxidizing the raw material sweet potato starch; 2) acidification: acidifying the oxidized sweet potato starch with hydrochloric acid; and 3) etherification: adding ethylene oxide to the acidified oxidized sweet potato starch in the nitrogen environment to obtain the retarding and water reducing agent. The preparation method of the retarding and water reducing agent provided by the invention has the beneficial effect that the simple and easy-to-get raw material sweet potato starch is taken as the major raw material, and the operation of the preparation method is simple and convenient.
Description
Technical field
The present invention relates to a kind of preparation method of retardation water reducing agent.
Background technology
Efficient retarding and water reducing agent is that a naphthalenesulfonic acid-formaldehyde condensate is main, more compound kinds of surface active substance and the retarding-type superplasticizer made.Water-reducing rate is high, fluidisation is good, and Slump Time losing of Large is little, does not emanate, bleeding not.Simultaneously can increase substantially concrete mobility and each age strength, especially later strength has obvious reinforced effects, is high-strength concrete, commerical ready-mixed concrete, exempts to shake the first-selected admixture of the novel procesies such as concrete, Self-leveling grouting material.But traditional retardation water reducing agent, its raw material is processed more complicated, industrial production difficulty.
Summary of the invention
Object of the present invention is exactly for above-mentioned defect of the prior art, provides a kind of raw material simple and easy to get, the preparation method of retardation water reducing agent easy and simple to handle.
To achieve these goals, technical scheme provided by the invention is: a kind of preparation method of retardation water reducing agent, includes following steps:
1) oxidation: get raw material sweet potato starch and be mixed with the water soluble starch breast that quality percentage composition is 55-60%, take sodium hydroxide adjust pH as 8-9, be added dropwise to again the clorox of 12ml, after 40 ℃ of water bath with thermostatic control oxidation 4h, add appropriate sodium bisulfite termination reaction, after filtration, washing, 50 ℃ of forced air drying 6h, obtain being oxidized sweet potato starch;
2) acidifying: oxidation sweet potato starch step 1) being obtained with dehydrated alcohol is mixed with the suspension that quality percentage composition is 30-40%, add 1.5% concentrated hydrochloric acid, under normal temperature, stir 2h, neutralize, filter, wash rear 50 ℃ of forced air drying 6h, obtain acidifying oxidation sweet potato starch;
3) etherificate: with dehydrated alcohol by step 2) acidifying that obtains oxidation sweet potato starch is mixed with the suspension that quality percentage composition is 30-40%, take sodium hydroxide adjust pH as 10-11, under nitrogen environment, add oxyethane, add-on is the 10%-20% of starch butt matter weight, airtight, 45 ℃ of oil bath 16-24h, again with absolute ethanol washing 2-3 time, filter, 50 ℃ of forced air drying 4h, obtain retardation water reducing agent.
Beneficial effect of the present invention is: the preparation method of retardation water reducing agent provided by the invention, and as main raw material, easy and simple to handle with raw material sweet potato starch simple and easy to get, the product making has the following advantages:
1, the 0.5-1.5% (powder) that volume is total rubber, 1.0-3.0(liquid); Water-reducing rate can reach 15-30%.
2, when concrete strength and the slump are identical with normal concrete, can save cement 15-20%.Under same proportioning and the condition with the slump, 3 days intensity of concrete improves 40-80%, and within 7 days, intensity improves 30-60%, and within 28 days, intensity improves 20-40%.
3, mix retardation water reducing agent, can greatly improve concrete workability, improve concrete every mechanical property.
4, suitable hot season mass concrete continuous placing, reduce hydration heat, reduce concrete thermal stress, avoid the generation of thermal cracking.
5, anti-ly mix label and can reach S10,100 freeze thawing intensity are without significantly sacrificing, and endurance quality significantly improves.Also can prepare high resistance carbonated concrete.
6, little loss of slump is conducive to prepare the pump concrete of long distance transportation, puts for a long time and does not affect concrete pumping or natural effect.
7, the slow setting time: delay 2-5h time of coagulation, can configure especially.
8, this product no chlorine and low alkali, good to various cement adaptabilities, can be used for various reinforced concrete workss.
Embodiment
embodiment 1:
A preparation method for retardation water reducing agent, includes following steps:
1) oxidation: get raw material sweet potato starch and be mixed with the water soluble starch breast that quality percentage composition is 55-60%, take sodium hydroxide adjust pH as 8-9, be added dropwise to again the clorox of 12ml, after 40 ℃ of water bath with thermostatic control oxidation 4h, add appropriate sodium bisulfite termination reaction, after filtration, washing, 50 ℃ of forced air drying 6h, obtain being oxidized sweet potato starch;
2) acidifying: oxidation sweet potato starch step 1) being obtained with dehydrated alcohol is mixed with the suspension that quality percentage composition is 30-40%, add 1.5% concentrated hydrochloric acid, under normal temperature, stir 2h, neutralize, filter, wash rear 50 ℃ of forced air drying 6h, obtain acidifying oxidation sweet potato starch;
3) etherificate: with dehydrated alcohol by step 2) acidifying that obtains oxidation sweet potato starch is mixed with the suspension that quality percentage composition is 30-40%, take sodium hydroxide adjust pH as 10-11, under nitrogen environment, add oxyethane, add-on is the 10%-20% of starch butt matter weight, airtight, 45 ℃ of oil bath 16-24h, again with absolute ethanol washing 2-3 time, filter, 50 ℃ of forced air drying 4h, obtain retardation water reducing agent.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (1)
1. a preparation method for retardation water reducing agent, is characterized in that, includes following steps:
1) oxidation: get raw material sweet potato starch and be mixed with the water soluble starch breast that quality percentage composition is 55-60%, take sodium hydroxide adjust pH as 8-9, be added dropwise to again the clorox of 12ml, after 40 ℃ of water bath with thermostatic control oxidation 4h, add appropriate sodium bisulfite termination reaction, after filtration, washing, 50 ℃ of forced air drying 6h, obtain being oxidized sweet potato starch;
2) acidifying: oxidation sweet potato starch step 1) being obtained with dehydrated alcohol is mixed with the suspension that quality percentage composition is 30-40%, add 1.5% concentrated hydrochloric acid, under normal temperature, stir 2h, neutralize, filter, wash rear 50 ℃ of forced air drying 6h, obtain acidifying oxidation sweet potato starch;
3) etherificate: with dehydrated alcohol by step 2) acidifying that obtains oxidation sweet potato starch is mixed with the suspension that quality percentage composition is 30-40%, take sodium hydroxide adjust pH as 10-11, under nitrogen environment, add oxyethane, add-on is the 10%-20% of starch butt matter weight, airtight, 45 ℃ of oil bath 16-24h, again with absolute ethanol washing 2-3 time, filter, 50 ℃ of forced air drying 4h, obtain retardation water reducing agent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310702540.XA CN103739230A (en) | 2013-12-19 | 2013-12-19 | Preparation method of retarding and water reducing agent |
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| CN201310702540.XA CN103739230A (en) | 2013-12-19 | 2013-12-19 | Preparation method of retarding and water reducing agent |
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| CN103739230A true CN103739230A (en) | 2014-04-23 |
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| CN201310702540.XA Pending CN103739230A (en) | 2013-12-19 | 2013-12-19 | Preparation method of retarding and water reducing agent |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106277909A (en) * | 2016-08-19 | 2017-01-04 | 桂林华越环保科技有限公司 | Concrete retarder |
| CN106316200A (en) * | 2016-08-19 | 2017-01-11 | 桂林华越环保科技有限公司 | Composite concrete retarder |
| CN106316191A (en) * | 2016-08-19 | 2017-01-11 | 桂林华越环保科技有限公司 | Retarder for concrete |
| CN106316206A (en) * | 2016-08-19 | 2017-01-11 | 桂林华越环保科技有限公司 | Concrete retarder |
| CN106348637A (en) * | 2016-08-19 | 2017-01-25 | 桂林华越环保科技有限公司 | Novel concrete retarder |
| CN106517849A (en) * | 2015-09-10 | 2017-03-22 | 绵阳莫仕科技有限公司 | Oxidation-sulfonation starch water reducing agent preparation method |
| CN108285287A (en) * | 2017-12-26 | 2018-07-17 | 南宁砼材科技有限责任公司 | Composite water-reducing agent containing modified tapioca starch and its application |
| CN108299596A (en) * | 2017-12-26 | 2018-07-20 | 南宁砼材科技有限责任公司 | Modified tapioca starch water-reducing agent and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633700A (en) * | 2009-08-28 | 2010-01-27 | 西南科技大学 | Preparation method of oxidation-etherification starch used as concrete water reducer |
| CN103387352A (en) * | 2013-07-25 | 2013-11-13 | 北京市建筑工程研究院有限责任公司 | Method for preparing biomass water reducing agent by adopting lead screw extruding method |
-
2013
- 2013-12-19 CN CN201310702540.XA patent/CN103739230A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633700A (en) * | 2009-08-28 | 2010-01-27 | 西南科技大学 | Preparation method of oxidation-etherification starch used as concrete water reducer |
| CN103387352A (en) * | 2013-07-25 | 2013-11-13 | 北京市建筑工程研究院有限责任公司 | Method for preparing biomass water reducing agent by adopting lead screw extruding method |
Non-Patent Citations (2)
| Title |
|---|
| 赵平等: "改性淀粉作为混凝土缓凝减水剂的性能研究", 《混凝土与水泥制品》, no. 7, 31 July 2012 (2012-07-31), pages 1 - 5 * |
| 赵平等: "氧化-酸化-醚化淀粉减水剂的合成", 《武汉理工大学学报》, vol. 33, no. 11, 30 November 2011 (2011-11-30), pages 33 - 37 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106517849A (en) * | 2015-09-10 | 2017-03-22 | 绵阳莫仕科技有限公司 | Oxidation-sulfonation starch water reducing agent preparation method |
| CN106517849B (en) * | 2015-09-10 | 2018-11-23 | 绵阳莫仕科技有限公司 | A kind of preparation method of oxidation-sulfonated starch water-reducing agent |
| CN106316206B (en) * | 2016-08-19 | 2018-11-06 | 桂林华越环保科技有限公司 | A kind of concrete retarder |
| CN106316206A (en) * | 2016-08-19 | 2017-01-11 | 桂林华越环保科技有限公司 | Concrete retarder |
| CN106348637A (en) * | 2016-08-19 | 2017-01-25 | 桂林华越环保科技有限公司 | Novel concrete retarder |
| CN106316191A (en) * | 2016-08-19 | 2017-01-11 | 桂林华越环保科技有限公司 | Retarder for concrete |
| CN106348637B (en) * | 2016-08-19 | 2018-10-30 | 桂林华越环保科技有限公司 | Concrete retarder |
| CN106277909A (en) * | 2016-08-19 | 2017-01-04 | 桂林华越环保科技有限公司 | Concrete retarder |
| CN106316191B (en) * | 2016-08-19 | 2018-11-06 | 桂林华越环保科技有限公司 | retarder for concrete |
| CN106316200B (en) * | 2016-08-19 | 2018-11-06 | 桂林华越环保科技有限公司 | Composite concrete retarder |
| CN106316200A (en) * | 2016-08-19 | 2017-01-11 | 桂林华越环保科技有限公司 | Composite concrete retarder |
| CN108285287A (en) * | 2017-12-26 | 2018-07-17 | 南宁砼材科技有限责任公司 | Composite water-reducing agent containing modified tapioca starch and its application |
| CN108299596A (en) * | 2017-12-26 | 2018-07-20 | 南宁砼材科技有限责任公司 | Modified tapioca starch water-reducing agent and preparation method thereof |
| CN108285287B (en) * | 2017-12-26 | 2021-07-20 | 南宁砼材科技有限责任公司 | Composite water reducing agent containing modified cassava starch and application thereof |
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Application publication date: 20140423 |