CN102199015A - Cement containing polycarboxylic acid water reducing agent - Google Patents
Cement containing polycarboxylic acid water reducing agent Download PDFInfo
- Publication number
- CN102199015A CN102199015A CN2010105082654A CN201010508265A CN102199015A CN 102199015 A CN102199015 A CN 102199015A CN 2010105082654 A CN2010105082654 A CN 2010105082654A CN 201010508265 A CN201010508265 A CN 201010508265A CN 102199015 A CN102199015 A CN 102199015A
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- China
- Prior art keywords
- cement
- water
- reducing agent
- water reducing
- grinding
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/361—Condition or time responsive control in hydraulic cement manufacturing processes
- C04B7/362—Condition or time responsive control in hydraulic cement manufacturing processes for raw materials handling, e.g. during the grinding or mixing step
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to cement containing a polycarboxylic acid water reducing agent, which is characterized by being prepared by the following steps of: mixing hydrolyzed polymaleic acid, polyethylene glycol monomethyl ether and sodium hydroxide, adding water to prepare solution, adding the solution into cement to be ground in a weight ratio of (0.3-0.7):100, and grinding. The invention has the advantages that: 1, excess energy in the process of grinding the cement is fully utilized, and energy consumption in the synthesis of preparing the conventional water reducing agent is reduced; 2, a complicated process and equipment investment in the production of the conventional water reducing agent are eliminated; 3, the prepared water reducing agent is better combined with the cement and has a better water reducing effect; and 4, the used raw materials have a certain auxiliary effect of grinding the cement.
Description
(1) technical field
The present invention relates to a kind of cement, particularly utilize the energy in the cement pulverizing course to prepare the cement that contains polycarboxylate water-reducer.
(2) background technology
Cement water reducing agent is divided into three big series, the one, sulfonated lignin water reducer usually both at home and abroad at present; The 2nd, the aromatic sulfonated polymer water reducer; The 3rd, polycarboxylic acids dehydragent.But a spot of other kind is also arranged, as trimeric cyanamide system and sulfamate etc.
Lignosulfonic acid salt water reducer retardation phenomenon is more serious, and its raw material is from industrial effluent.The performance of xylogen and the influence of toxic and harmful substance are difficult to control, and its water-reducing rate is only about 8%-13%, and present domestic consumption is little, but because it cheaply still has use.
Characteristics such as naphthalene water reducer has mature production technology, not bleed, slow setting, cement adaptability be not good, but slump-loss is bigger, be difficult to satisfy the construction requirement of actual engineering, generally need by compound use, and many composite prod quality instabilities are arranged, influence concrete hardness and the weather resistance of condensing, this product uses formaldehyde, the vitriol oil to be prepared from mostly in addition, the preparation process environmental pollution is serious, and also be subjected to the influence of raw naphthalene material resource, domestic naphthalene resource can't satisfy the chemical engineering industry demand.
Its diminishing enhancement of melamine system water reducer slightly is better than naphthalene water reducer, but is higher than naphthalene system on usage quantity and price.Owing to being that the liquid use is restricted, the storage time is short in addition, slump-loss is big, concrete is clamminess, and practical application is less.
Sulfamate also is a kind of high efficiency water reducing agent, and synthesis technique is simple than naphthalene system, diminishing efficient height, and slump-loss is little, but volume and cement are all compared sensitivity, and retarding effect is obvious, and main at present and naphthalene is compound use.
Polycarboxylic acids dehydragent has water-reducing rate height (more than 30%), volume is few, function of slump protection good, later strength is big, amount of air entrainment and slow setting are comparatively moderate, suitable preparation high workability, self-compacting concrete and the synthetic formaldehyde that do not use, to the little excellent properties that waits of environmental influence, become brand-new high-performance water reducing agent, be considered to the representative kind of third generation efficient cement water reducing agent.
Poly carboxylic acid series water reducer is high-strength high-flowing concrete, the most important composition material of high volume fly ash concrete, so its prospect will be more and more wide.But because cost and technical feature problem, the poly carboxylic acid series water reducer of domestic development does not nearly all reach the practicability stage.Relevant paper from domestic periodical and journal, domestic research to the poly carboxylic acid series water reducer product only is in the laboratory development stage, can be also very limited for the starting material that synthesizing polycarboxylic acid dehydragent is selected, choosing production technique, reduce cost, improve many aspects such as performance from the water reducer starting material, also only is starting.Some laboratory synthetic water reducers, its over-all properties is not fine, also has sizable gap from industrial applications.
Japan is that research and application poly carboxylic acid series water reducer at most also are the most successful countries, the acrylic acid graft copolymer cement water reducing agent volume of its research was less than 0.1% o'clock, can be reduced to concrete water cement ratio about 0.20, the preparation slump is that 250mm, intensity are that the strong concrete of 100MPa is used for Prestressed Concrete Bridges, and concrete kept good operation in 2 hours.Japan is few about prepare cement water reducing agent report quantity with maleic anhydride, and technology is all complicated.
Some technical information were in this respect also disclosed in the Chinese patent application, as number of patent application be 200410027709.7, name is called " a kind of preparation method of polyether grafting polyocarboxy acid type cement water reducing agent "; And for example please number be 200510019876.1, name is called " a kind of maleic anhydride series concrete water-reducing agent and preparation method ".Particularly disclose in one application of back " is in the method for feedstock production cement water reducing agent with maleic anhydride; be earlier to carry out esterification with maleic anhydride and methoxy poly (ethylene glycol); being catalyzer to benzene methanesulfonic acid; cuprous chloride and Resorcinol are stopper; toluene is solvent; react and get esterification products more than 10 hours, carry out polyreaction with the rare sodium sulfonate of 2-third rare acid amides-2 methyl-prop after removing solvent toluene, with the ammonium persulphate is initiator, mercaptoethanol is a chain-transfer agent, 95 ℃ of reactions down, obtain water reducer solution." from the above, prepare the method for cement water reducing agent with maleic anhydride, need in esterification, add stopper and solvent, reaction finishes the back and separates the difficulty of purifying, and technology is longer than complexity and reaction times.
By above analysis as seen, the production method of water reducer all is that various raw materials are obtained by heating, reacting under various catalyzer or initiator effect at present, just mixes in the concrete during use.
(3) summary of the invention
The objective of the invention is to utilize the energy in the cement pulverizing course to prepare a kind of cement that contains polycarboxylate water-reducer.In the process of preparation cement, not only can make full use of the excess energy in the cement pulverizing course, the energy expenditure when also having saved the preparation water reducer has been simplified the water reducer synthesis technique, has improved the action effect of water reducer.
The present invention regulates pH value between 10～13 by hydrolyzed polymaleic acid, poly glycol monomethyl ether and sodium hydroxide mixing and water adding are mixed with solution, again with wait to grind cement by 0.3～0.7: 100 weight ratio, join in the cement to be ground, behind the grinding promptly.
The weight ratio of described hydrolyzed polymaleic acid, poly glycol monomethyl ether, sodium hydroxide is 0.5～1.5: 1: 0.3～1.0.
The molecular weight of described poly glycol monomethyl ether is 1000～2000.
During cement grinding, above-mentioned solution mixes to be waited to grind in the cement, and waits that grinding the wherein various raw materials of the common grinding of cement reacts, and forms a kind of cement that contains polycarboxylate water-reducer of the present invention.
Advantage of the present invention:
1. the present invention has made full use of the excess energy in the cement pulverizing course, has saved to prepare the energy expenditure of traditional water reducer in synthetic;
2. complicated technology and facility investment that traditional water reducer is produced have been saved among the present invention;
3. the prepared water reducer of the present invention combines better with cement, and water-reducing effect is better;
4. the present invention is raw materials used has certain grinding aid effect to cement grinding.
(4) embodiment
Embodiment 1:
With molecular weight is 1000 poly glycol monomethyl ether 60.0g, hydrolyzed polymaleic acid 90.0g, and sodium hydroxide 60.0g mixes, and adds 100g water stirring and dissolving.Get 5Kg cement to be ground, add in the test mill, the solution that adds 15g simultaneously and prepared promptly gets the cement that the present invention contains polycarboxylate water-reducer behind the grinding.
Embodiment 2:
With molecular weight is 2000 poly glycol monomethyl ether 60.0g, hydrolyzed polymaleic acid 90.0g, and sodium hydroxide 60.0g mixes, and adds 100g water stirring and dissolving.Get 5Kg cement to be ground, add in the test mill, the solution that adds 15g simultaneously and prepared promptly gets the cement that the present invention contains polycarboxylate water-reducer behind the grinding.
Embodiment 3:
With molecular weight is 1000 poly glycol monomethyl ether 60.0g, hydrolyzed polymaleic acid 30.0g, and sodium hydroxide 18.0g mixes, and adds 55g water stirring and dissolving.Get 5Kg and wait to grind cement and add in the test mill, the solution that adds 15g simultaneously and prepared promptly gets the cement that the present invention contains polycarboxylate water-reducer behind the grinding.
Embodiment 4:
With molecular weight is 2000 poly glycol monomethyl ether 60.0g, hydrolyzed polymaleic acid 30.0g, and sodium hydroxide 18.0g mixes, and adds 55g water stirring and dissolving.Get 5Kg cement clinker to be ground, add in the test mill, the solution that adds 15g simultaneously and prepared promptly gets the cement that the present invention contains polycarboxylate water-reducer behind the grinding.
Embodiment 5:
With molecular weight is 1000 poly glycol monomethyl ether 60.0g, hydrolyzed polymaleic acid 90.0g, and sodium hydroxide 60.0g mixes, and adds 100g water stirring and dissolving.Get 5Kg and wait to grind cement clinker and add in the test mill, the solution that adds 35g simultaneously and prepared promptly gets the cement that the present invention contains polycarboxylate water-reducer behind the grinding.
Embodiment 6:
With molecular weight is 2000 poly glycol monomethyl ether 60.0g, hydrolyzed polymaleic acid 90.0g, and sodium hydroxide 60.0g mixes, and adds 100g water stirring and dissolving.Get 5Kg and wait to grind cement and add in the test mill, the solution that adds 35g simultaneously and prepared promptly gets the cement that the present invention contains polycarboxylate water-reducer behind the grinding.
Embodiment 7:
With molecular weight is 1000 poly glycol monomethyl ether 60.0g, hydrolyzed polymaleic acid 30.0g, and sodium hydroxide 18.0g mixes, and adds 55g water stirring and dissolving.Get 5Kg and wait to grind cement and add in the test mill, the solution that adds 35g simultaneously and prepared promptly gets the cement that the present invention contains polycarboxylate water-reducer behind the grinding.
Embodiment 8:
With molecular weight is 2000 poly glycol monomethyl ether 60.0g, hydrolyzed polymaleic acid 30.0g, and sodium hydroxide 18.0g mixes, and adds 55g water stirring and dissolving.Get 5Kg and wait to grind cement and add in the test mill, the solution that adds 35g simultaneously and prepared promptly gets the cement that the present invention contains polycarboxylate water-reducer behind the grinding.
Embodiment 9:
By embodiment 1 to the embodiment 8 prepared cement that contains water reducer, according to GB/T8077-2000 the cement of the polycarboxylate water-reducer of gained being carried out cement tests degree of mobilization only, according to GB/T8076-1997 the cement of the polycarboxylate water-reducer of gained is carried out the concrete water-reducing ratio test, water reducer, observed value such as following table are not mixed in blank representative:
Use contains the concrete test block of the cement production of water reducer of the present invention.3 days ultimate compression strength improves greater than 35%, 7 day ultimate compression strength and improves ultimate compression strength raising 30% in 40%, 28 day.
Claims (3)
1. cement that contains polycarboxylate water-reducer, it is characterized in that hydrolyzed polymaleic acid, poly glycol monomethyl ether and sodium hydroxide mixing and water adding are mixed with solution, again with wait to grind cement by 0.3～0.7: 100 weight ratio, join in the cement to be ground, behind the grinding promptly.
2. the cement that contains polycarboxylate water-reducer according to claim 1 is characterized in that hydrolyzed polymaleic acid, poly glycol monomethyl ether, sodium hydroxide are 0.5～1.5: 1: 0.3～1.0 by weight.
3. the cement that contains polycarboxylate water-reducer according to claim 1 and 2, the molecular weight that it is characterized in that poly glycol monomethyl ether is 1000～2000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105082654A CN102199015A (en) | 2010-10-15 | 2010-10-15 | Cement containing polycarboxylic acid water reducing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105082654A CN102199015A (en) | 2010-10-15 | 2010-10-15 | Cement containing polycarboxylic acid water reducing agent |
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| Publication Number | Publication Date |
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| CN102199015A true CN102199015A (en) | 2011-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105082654A Pending CN102199015A (en) | 2010-10-15 | 2010-10-15 | Cement containing polycarboxylic acid water reducing agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108101410A (en) * | 2017-12-28 | 2018-06-01 | 湖北鑫统领万象科技有限公司 | A kind of house ornamentation cement additive and its application |
Citations (6)
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| CN101182139A (en) * | 2007-11-12 | 2008-05-21 | 华南理工大学 | Masonry cement having higher strength and water retention |
| CN101386492A (en) * | 2008-10-17 | 2009-03-18 | 南京永能建材技术有限公司 | Liquid cement grinding aid and preparation method thereof |
| CN101525403A (en) * | 2009-03-26 | 2009-09-09 | 山东宏艺科技有限公司 | Method for synthesizing cement grinding reinforcing agent |
| CN101671142A (en) * | 2009-10-13 | 2010-03-17 | 王涛 | Cement reinforced grinding aid prepared with hydrolyzed polymaleic acid |
| EP2194078A1 (en) * | 2008-12-08 | 2010-06-09 | Construction Research and Technology GmbH | Process for the production of copolymers |
| CN101798198A (en) * | 2010-04-03 | 2010-08-11 | 山东宏艺科技股份有限公司 | Polycarboxylic acid cement activation reinforced grinding aid and preparation method thereof |
-
2010
- 2010-10-15 CN CN2010105082654A patent/CN102199015A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182139A (en) * | 2007-11-12 | 2008-05-21 | 华南理工大学 | Masonry cement having higher strength and water retention |
| CN101386492A (en) * | 2008-10-17 | 2009-03-18 | 南京永能建材技术有限公司 | Liquid cement grinding aid and preparation method thereof |
| EP2194078A1 (en) * | 2008-12-08 | 2010-06-09 | Construction Research and Technology GmbH | Process for the production of copolymers |
| CN101525403A (en) * | 2009-03-26 | 2009-09-09 | 山东宏艺科技有限公司 | Method for synthesizing cement grinding reinforcing agent |
| CN101671142A (en) * | 2009-10-13 | 2010-03-17 | 王涛 | Cement reinforced grinding aid prepared with hydrolyzed polymaleic acid |
| CN101798198A (en) * | 2010-04-03 | 2010-08-11 | 山东宏艺科技股份有限公司 | Polycarboxylic acid cement activation reinforced grinding aid and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 张海波，管学茂: "碱催化聚羧酸高效减水剂合成研究", 《中国硅酸盐学会水泥分会首届学术年会论文集》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108101410A (en) * | 2017-12-28 | 2018-06-01 | 湖北鑫统领万象科技有限公司 | A kind of house ornamentation cement additive and its application |
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Application publication date: 20110928 |