CN1099089A - Early strength water reducing agent for non-alkali concrete - Google Patents
Early strength water reducing agent for non-alkali concrete Download PDFInfo
- Publication number
- CN1099089A CN1099089A CN 94105914 CN94105914A CN1099089A CN 1099089 A CN1099089 A CN 1099089A CN 94105914 CN94105914 CN 94105914 CN 94105914 A CN94105914 A CN 94105914A CN 1099089 A CN1099089 A CN 1099089A
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- CN
- China
- Prior art keywords
- reducing agent
- alkali
- naphthalene
- early strength
- condensation
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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 non-alkali efficient water reducer is made up of naphthalene through sulfuric acid sulfonation, formaldehyde condensation and lime neutralization, as well as mixing with ordinary water reducer, hydrated silicate minerals, inorganic salt of non-alkali metal, organic strength promoter, etc. grinding and mixing. As alkali is removed, long service life of concrete is ensured.
Description
The present invention relates to a kind of early strength water reducing agent for non-alkali concrete, belong to building material technical field.
Concrete can produce alkali-aggregate reaction having under certain humidity, certain alkali content and the activated condition of aggregate (or gathering materials), produces and expands, and destroys concrete, makes it cause cracking so that completely lose function, thereby the title of cancer in the concrete is arranged.Alkali content is (with Na in the present cement
2The O meter) near producing alkali-aggregate reaction threshold (1.8～3.8kg/m
3), generally at 2.5～3.5kg/m
3About, exist and produce alkali-aggregate reaction danger.Extensively in concrete, using early strength water-reducing agent to estimate that the whole nation reaches several ten thousand tons every year now.And these early strength water-reducing agents overwhelming majority contains a large amount of alkaloids.As the early strength water-reducing agent based on glauber salt commonly used, at volume 3%, cement consumption 300kg/m
3Condition under, can introduce 3.3kg/m in the concrete
3Bases.Because they are the lyotropic salt class, easier participation reaction.Therefore, these Admixtures join in the concrete, as long as other conditions being possessed is certain to promote greatly to produce the alkali-aggregate reaction that this type of has great damaging effect.
The objective of the invention is to develop a kind of early strength water reducing agent for non-alkali concrete, remove the alkaloids in the used early strength water-reducing agent of prior art, arranged sufficiently long application life to guarantee concrete.
Content of the present invention is:
Early strength water reducing agent for non-alkali concrete, form by following each component:
(1) alkali-free high efficiency water reducing agent, its preparation technology is: through sulfuric acid sulfonation, the ratio of sulfonation is a naphthalene with naphthalene: sulfuric acid=1: 0.5～1.5, sulfonation temperature are 125 ℃～180 ℃, and the time is 2-5 hour.Through formaldehyde condensation, the condensation ratio is: naphthalene then: formaldehyde=1: 0.5～1.5, and the condensation time is 3-8 hour, and condensation temp is 85～120 ℃, is neutralized to neutrality with lime at last, and drying makes after filtration.
(2) non-alkali metal inorganic salts, any in calcium sulfate, calcium nitrite, calcium nitrate, magnesium sulfate or the magnesium nitrate obtained by commercially available.
(3) silicate hydration mineral are 3MgOSiO
2H
2O, Al
2O
32SiO
2H
2O,, 6MgO4SiO
2, 3CaOAl
2O
3CaSO
412H
2Any among the O.Its drying, fragmentation, grinding to 80～100 orders can be used.Such hydration mineral can be certain natural hydration silicate minerals, also can be by artificial synthetic making.
(4) organic agent of promoting the strong is triisopropanolamine, triethanolamine, methyl alcohol, calcium acetate, any in calcium formate and the urea.Its preparation method is that the aforesaid liquid product are mixed into powder with 1: 1～10 ratio and flyash, is crushed to 80 mesh sieves.If the solid product can directly be crushed to it 80 mesh sieves and use.
(5) auxiliary material, any in flyash, silicon ash and the zeolite powder was crushed to 80 mesh sieves.
Above-mentioned five kinds of components and commercially available ordinary water-reducing agent are mixed with following ratio, product: alkali-free high efficiency water reducing agent: 2～10% ordinary water-reducing agents: 0.5～5%
Non-alkali metal inorganic salts: 5～30% silicate hydration mineral: 10～80%
Organic agent of promoting the strong: 0.05～0.5% auxiliary material: an amount of
Introduce several embodiments of the present invention below.
Embodiment one
Naphthalene 1kg adds 0.8kg sulfuric acid, 125 ℃ of sulfonation 3 hours, adds 0.8kg formaldehyde 85 ℃ of following condensations 5 hours, adds water 2kg, and it is an amount of to add lime emulsification, makes its PH=7.5～8.0, and filtration, drying, grinding are to becoming product by 80 mesh sieves; Add Lignosite 0.5kg; Add levigate to 80 purpose calcium sulfate 10kg; Add silicate hydration mineral 3MgOSiO
2H
2O is levigate to 80 purpose powder 20kg; Add organic agent calcium formate 2.5kg that promotes the strong; (levigate to 80 orders) is mixed into product.
Embodiment two
Naphthalene 1kg adds 1.2kg sulfuric acid, 150 ℃ of sulfonation 3 hours, adds the 0.8kg formaldehyde condensation, 95 ℃ of following condensations 4 hours, adds water 2kg, adds milk of lime and makes its PH=7～8, and filtration, drying, grinding are to becoming product by 80 mesh sieves; Add ordinary water-reducing agent Lignosite 0.3kg; Add levigate to 80 purpose calcium nitrite 15kg; Add 3CaOAl
2O
3CaSO
412H
2O is finely ground to 80 purpose powder 30kg; Add levigate to passing through 80 purpose calcium formate 4kg; Be mixed into product.
Embodiment three
Naphthalene 1kg adds 1.5kg sulfuric acid, 170 ℃ of sulfonation 5 hours, adds water 0.3kg, adds formaldehyde 0.9kg, 110 ℃ of following condensations 4 hours, adds water 2kg, adds milk of lime and is neutralized to PH=7.5～8.5, and filtration, drying, grinding are to passing through 80 orders; Add Lignosite 1.5kg; Magnesium nitrate 10kg; Levigate to 80 purpose Al
2O
32SiO
2H
2O 20kg; Add 1 part of methyl alcohol and 10 parts of flyash and mix thing 0.5kg thoroughly; Be mixed into product.
Claims (1)
1, a kind of early strength water reducing agent for non-alkali concrete is characterized in that early strength water-reducing agent is made up of following each component:
(1) alkali-free high efficiency water reducing agent, its preparation technology is: with naphthalene through sulfuric acid sulfonation, the ratio of sulfonation is a naphthalene: sulfuric acid=1: 0.5～1.5, sulfonation temperature are 125 ℃-180 ℃, and the time is 2-5 hour, then through formaldehyde condensation, the condensation ratio is: naphthalene: formaldehyde=1: 0.5～1.5, and the condensation time is 3-8 hour, condensation temp is 85 ℃～120 ℃, be neutralized to neutrality with lime at last, drying makes after filtration;
(2) non-alkali metal inorganic salts, any in calcium sulfate, calcium nitrate, magnesium sulfate or the magnesium nitrate obtained by commercially available;
(3) silicate hydration mineral are 3MgOSiO
2H
2O, Al
2O
32SiO
2H
2O, 6MgO4SiO
2, 3CaOAl
2O
3CaSO
412H
2Any among the O can use its drying, fragmentation, grinding to 80～100 orders;
(4) organic agent of promoting the strong is triisopropanolamine, triethanolamine, and methyl alcohol, calcium acetate, any in calcium formate and the urea, its preparation method was crushed to 80 mesh sieves for 1: 1～10 ratio and flyash with aforesaid liquid is mixed into powder;
(5) auxiliary material, any in flyash, silicon ash and the zeolite powder was crushed to 80 mesh sieves;
Above-mentioned five kinds of components and commercially available ordinary water-reducing agent are mixed with following ratio, product:
Alkali-free high efficiency water reducing agent: 2～10% ordinary water-reducing agents: 0.5～5%
Non-alkali metal inorganic salts: 5～30% silicate hydration mineral: 10～80%
Organic agent of promoting the strong: 0.05～0.5% auxiliary material: an amount of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94105914 CN1099089A (en) | 1994-06-03 | 1994-06-03 | Early strength water reducing agent for non-alkali concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94105914 CN1099089A (en) | 1994-06-03 | 1994-06-03 | Early strength water reducing agent for non-alkali concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1099089A true CN1099089A (en) | 1995-02-22 |
Family
ID=5032260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94105914 Pending CN1099089A (en) | 1994-06-03 | 1994-06-03 | Early strength water reducing agent for non-alkali concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1099089A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308299C (en) * | 2003-02-05 | 2007-04-04 | 独立行政法人科学技术振兴机构 | Polycyclic aromatic carbon based solid strong acid |
| CN100391883C (en) * | 2001-03-02 | 2008-06-04 | 詹姆士·哈代国际金融公司 | Additive for dewaterable slurry |
| US7658794B2 (en) | 2000-03-14 | 2010-02-09 | James Hardie Technology Limited | Fiber cement building materials with low density additives |
| CN101497506B (en) * | 2009-03-20 | 2011-07-20 | 武汉市联合石油化工有限责任公司 | Process for preparing modified naphthalene series water reducing agent |
| US7993570B2 (en) | 2002-10-07 | 2011-08-09 | James Hardie Technology Limited | Durable medium-density fibre cement composite |
| US7998571B2 (en) | 2004-07-09 | 2011-08-16 | James Hardie Technology Limited | Composite cement article incorporating a powder coating and methods of making same |
| CN101391875B (en) * | 2008-10-30 | 2012-01-25 | 安徽淮河化工股份有限公司 | High-early strength type additive special for shaft slipform construction concrete |
| US8209927B2 (en) | 2007-12-20 | 2012-07-03 | James Hardie Technology Limited | Structural fiber cement building materials |
| US8993462B2 (en) | 2006-04-12 | 2015-03-31 | James Hardie Technology Limited | Surface sealed reinforced building element |
| CN105152575A (en) * | 2015-09-24 | 2015-12-16 | 滁州京安工贸有限责任公司 | Chloride-free low-alkaline type concrete set retarding superplasticizer |
| CN105174794A (en) * | 2015-09-24 | 2015-12-23 | 滁州京安工贸有限责任公司 | Chloride-free early-strength water-reducing agent capable of improving concrete workability |
| CN108285284A (en) * | 2018-01-26 | 2018-07-17 | 淮南市晋淮建化科技有限公司 | A kind of super hardening water-reducing agent for hydraulic engineering and salvaging |
-
1994
- 1994-06-03 CN CN 94105914 patent/CN1099089A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7727329B2 (en) | 2000-03-14 | 2010-06-01 | James Hardie Technology Limited | Fiber cement building materials with low density additives |
| US8182606B2 (en) | 2000-03-14 | 2012-05-22 | James Hardie Technology Limited | Fiber cement building materials with low density additives |
| US7658794B2 (en) | 2000-03-14 | 2010-02-09 | James Hardie Technology Limited | Fiber cement building materials with low density additives |
| US7704316B2 (en) | 2001-03-02 | 2010-04-27 | James Hardie Technology Limited | Coatings for building products and methods of making same |
| CN100391883C (en) * | 2001-03-02 | 2008-06-04 | 詹姆士·哈代国际金融公司 | Additive for dewaterable slurry |
| US7993570B2 (en) | 2002-10-07 | 2011-08-09 | James Hardie Technology Limited | Durable medium-density fibre cement composite |
| CN1308299C (en) * | 2003-02-05 | 2007-04-04 | 独立行政法人科学技术振兴机构 | Polycyclic aromatic carbon based solid strong acid |
| US7998571B2 (en) | 2004-07-09 | 2011-08-16 | James Hardie Technology Limited | Composite cement article incorporating a powder coating and methods of making same |
| US8993462B2 (en) | 2006-04-12 | 2015-03-31 | James Hardie Technology Limited | Surface sealed reinforced building element |
| US8209927B2 (en) | 2007-12-20 | 2012-07-03 | James Hardie Technology Limited | Structural fiber cement building materials |
| CN101391875B (en) * | 2008-10-30 | 2012-01-25 | 安徽淮河化工股份有限公司 | High-early strength type additive special for shaft slipform construction concrete |
| CN101497506B (en) * | 2009-03-20 | 2011-07-20 | 武汉市联合石油化工有限责任公司 | Process for preparing modified naphthalene series water reducing agent |
| CN105152575A (en) * | 2015-09-24 | 2015-12-16 | 滁州京安工贸有限责任公司 | Chloride-free low-alkaline type concrete set retarding superplasticizer |
| CN105174794A (en) * | 2015-09-24 | 2015-12-23 | 滁州京安工贸有限责任公司 | Chloride-free early-strength water-reducing agent capable of improving concrete workability |
| CN108285284A (en) * | 2018-01-26 | 2018-07-17 | 淮南市晋淮建化科技有限公司 | A kind of super hardening water-reducing agent for hydraulic engineering and salvaging |
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