CN102199016A - Cement containing early strength agent - Google Patents
Cement containing early strength agent Download PDFInfo
- Publication number
- CN102199016A CN102199016A CN2010105082743A CN201010508274A CN102199016A CN 102199016 A CN102199016 A CN 102199016A CN 2010105082743 A CN2010105082743 A CN 2010105082743A CN 201010508274 A CN201010508274 A CN 201010508274A CN 102199016 A CN102199016 A CN 102199016A
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- China
- Prior art keywords
- cement
- hardening accelerator
- early strength
- strength agent
- 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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Abstract
The invention relates to cement containing an early strength agent. The cement is characterized by being prepared by the steps of: adding a solution according to 0.03-0.1 percent of the weight of cement to be ground to the cement to be ground, then grinding, wherein the solution is prepared by adding water to hydrolytic polymaleic acid, polyethylene glycol and sodium hydroxide. Rather than simple blending of an early strength agent with the cement, the invention has the advantages that: the excess energy produced in the cement grinding process is fully utilized to substitute energy to be consumed in preparing the early strength agent, and thus both time and energy are saved; the early strength agent prepared in the invention can be better combined with the cement, and the water reduction effect is better; and the raw materials used in the invention have certain grinding aid effect on cement grinding.
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 hardening accelerator.
(2) background technology
Cement early strength agent is meant and can improves cement early strength, and the admixture that later strength is not made significant difference.The main effect of hardening accelerator is: quicken hydrated cementitious speed, promote the development of early strength.
Present employed hardening accelerator can be divided into inorganic salts, organism class, organism class and inorganic salts complex accelerator according to chemical ingredients.
(1) inorganic salts: inorganic salts hardening accelerator is important villaumite hardening accelerator, vitriol hardening accelerator, nitrate hardening accelerator, nitrite hardening accelerator etc.
Important calcium chloride, sodium-chlor, aluminum chloride, Repone K, iron(ic) chloride, the lithium chlorides etc. of comprising of villaumite hardening accelerator, rationally these villaumites of admixture all can develop favourable to the early strength of cement.Now, villaumite does not allow to use in the highway cement concrete structure substantially, and nitrite has severe toxicity, use yet less.
Vitriol hardening accelerator commonly used comprises sodium sulfate (Sodium sulfate anhydrous.min(99)), calcium sulfate and vitriolate of tartar etc.
Nitrate and nitrite all play a driving role to cement hydration process.These salts can not only be as the hardening accelerator of cement, and can be used as cement frostproofer component and use.Nitrate and nitrite hardening accelerator commonly used are: nitrocalcite, SODIUMNITRATE, calcium nitrite, Sodium Nitrite etc.
Inorganic salt hardening accelerator can mutual compound use, to obtain better morning of potent fruit, as vitriol-villaumite hardening accelerator, vitriol-nitrate hardening accelerator, vitriol-nitrite hardening accelerator, villaumite-nitrate hardening accelerator, villaumite-nitrite hardening accelerator etc., certain ratio is arranged all on market.
(2) organism class: the most frequently used organic compound hardening accelerator is trolamine.Organic compound hardening accelerator also has calcium formiate, acetate, acetate and urea etc.
Trolamine normal with villaumite, the compound use of vitriol hardening accelerator, morning potent fruit more.
(3) organic class and inorganic salts complex accelerator: trolamine-villaumite, nitrocalcite-urea, calcium nitrite-nitrocalcite-urea, calcium nitrite-nitrocalcite-calcium chloride-trolamine, and calcium nitrite-nitrocalcite-calcium chloride-urea etc., all be the hardening accelerator product that organism class and inorganic salts are composited.Organism class and inorganic salts are compound to be used as hardening accelerator, and not only early potent fruit is outstanding, and helps to mend weak point and reduce cost.
The present invention has prepared a kind of cement that contains polymer hardening accelerator, and its consumption is little, and is early effective by force, also made full use of the excess energy in the cement pulverizing course, simultaneously cement pulverizing course had promoter action.
(3) summary of the invention
The purpose of this invention is to provide the energy that utilizes in the cement pulverizing course and prepare the cement that contains hardening accelerator.
The present invention is by by waiting to grind 0.03%～0.1% of cement weight, mix hydrolyzed polymaleic acid, polyoxyethylene glycol, sodium hydroxide adds water and is mixed with solution, adds in the cement to be ground, utilize the energy in the cement pulverizing course to react, preparation contains the cement of hardening accelerator.
Wherein the weight ratio of hydrolyzed polymaleic acid, polyoxyethylene glycol and sodium hydroxide is 0.3～1.2: 1: 0.2～1.0.
The molecular weight of described polyoxyethylene glycol is 4000～6000.
Advantage of the present invention: the present invention simply mixes hardening accelerator with cement, but:
1. made full use of the energy of required consumption when the excess energy in the cement pulverizing course substitutes preparation hardening accelerator, the time of promptly having saved has been saved the energy again;
2. the prepared hardening accelerator of the present invention combines better with cement, and water-reducing effect is better;
3. the present invention is raw materials used also has certain grinding aid effect to cement grinding.
(4) embodiment
Embodiment 1:
With molecular weight is 4000 polyoxyethylene glycol 60.0g, hydrolyzed polymaleic acid 72.0g, and sodium hydroxide 60.0g mixes, and adds 120.0g water stirring and dissolving.Get 5Kg and wait to grind cement and add in the test mill, the solution that adds 5.0g simultaneously and prepared promptly gets the cement that contains hardening accelerator of the present invention behind the grinding.
Embodiment 2:
With molecular weight is 4000 polyoxyethylene glycol 60.0g, hydrolyzed polymaleic acid 18.0g, and sodium hydroxide 12.0g mixes, and adds 60.0g water stirring and dissolving.Get 5Kg and wait to grind cement and add in the test mill, the solution that adds 1.5g simultaneously and prepared promptly gets the cement that contains hardening accelerator of the present invention behind the grinding.
Embodiment 3:
With molecular weight is 6000 polyoxyethylene glycol 60.0g, hydrolyzed polymaleic acid 72.0g, and sodium hydroxide 60.0g mixes, and adds 120.0g water, stirring and dissolving.Get 5Kg and wait to grind cement and add in the test mill, the solution that adds 5.0g simultaneously and prepared promptly gets the cement that contains hardening accelerator of the present invention behind the grinding.
Embodiment 4:
With molecular weight is 6000 polyoxyethylene glycol 60.0g, hydrolyzed polymaleic acid 18.0g, and sodium hydroxide 12.0g mixes, and adds 60.0g water stirring and dissolving.Get 5Kg and wait to grind cement and add in the test mill, the solution that adds 1.5g simultaneously and prepared promptly gets the cement that contains hardening accelerator of the present invention behind the grinding.
By embodiment 1 to the embodiment 4 prepared cement that contains hardening accelerator, according to GB/T17671-1999 test cement mortar strength, blank representative does not have hardening accelerator, observed value such as following table:
Claims (3)
1. cement that contains hardening accelerator is characterized in that mixing by hydrolyzed polymaleic acid, polyoxyethylene glycol and sodium hydroxide and adding the solution that water is mixed with by waiting to grind 0.03%～0.1% of cement weight, add in the cement to be ground, behind the grinding promptly.
2. the cement that contains hardening accelerator according to claim 1, the weight ratio that it is characterized in that hydrolyzed polymaleic acid, polyoxyethylene glycol and sodium hydroxide is 0.3～1.2: 1: 0.2～1.0.
3. the cement that contains hardening accelerator according to claim 1 and 2, the molecular weight that it is characterized in that polyoxyethylene glycol is 4000～6000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105082743A CN102199016A (en) | 2010-10-15 | 2010-10-15 | Cement containing early strength agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105082743A CN102199016A (en) | 2010-10-15 | 2010-10-15 | Cement containing early strength agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102199016A true CN102199016A (en) | 2011-09-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105082743A Pending CN102199016A (en) | 2010-10-15 | 2010-10-15 | Cement containing early strength agent |
Country Status (1)
| Country | Link |
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| CN (1) | CN102199016A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255954A (en) * | 2019-04-11 | 2019-09-20 | 武汉理工大学 | A kind of nanometer of lithium slag early strength agent and its preparation method and 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 |
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2010
- 2010-10-15 CN CN2010105082743A patent/CN102199016A/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 |
|---|
| 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255954A (en) * | 2019-04-11 | 2019-09-20 | 武汉理工大学 | A kind of nanometer of lithium slag early strength agent and its preparation method and application |
| CN110255954B (en) * | 2019-04-11 | 2021-08-24 | 武汉理工大学 | Nano lithium slag early strength agent and preparation method and application thereof |
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Application publication date: 20110928 |