CN1094477C - Set-accelerating admixture for hydraulic cement composition - Google Patents
Set-accelerating admixture for hydraulic cement composition Download PDFInfo
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Abstract
New set-accelerating admixtures for hydraulic cement compositions are disclosed. These admixtures incorporate known set accelerators and certain low molecular weight glycols, e.g., glycerol and ethylene glycol, are found to be surprisingly effective in decreasing the initial set time of hydraulic cements, mortars, and concretes, and are advantageous as reduced-temperature set-accelerators. Preferred embodiments of the invention may also comprise a component selected from the group consisting of certain alkanolamines and mixtures thereof.
Description
The application is dividing an application of Chinese patent application number is 94113758.9, denomination of invention is on September 23rd, 1994 Chinese patent application case for " being mixed with the hydraulic cement setting accelerator of polyvalent alcohol ", the applying date.
Female case application of the application is the unsettled U. S. application 08/046 that proposed on April 9th, 1993,110 part subsequent application, and 08/046,110 is again the now resigned U. S. application 07/827 that proposes on January 28th, 1992,196 subsequent application, its whole disclosures are hereby incorporated by.
The present invention relates to be used for hydraulic cement composition such as mortar, grout and concrete improvement setting accelerator.In particular, the present invention relates to novel setting accelerator and adopt interpolation some low-molecular-weight polyvalent alcohol such as glycerol, ethylene glycol and glycol ether come the method for accelerated solidification.
When freezing or when using hydraulic cement composition under the temperature of freezing, should use setting accelerator.For example, temperature has a significant impact the hydration rate of portland cement, such as, during low temperature, portland cement composition setting rate is generally slow than what require, unless the accelerate hardening process.Except accelerated solidification, also wish under normal or low temperature, can increase the tempo of early strength.Can shorten the maintenance and the protection time necessary that reach the concrete prescribed strength like this.Some technology of accelerated solidification are: increase the ratio of cement in the mixed material, add hot mixture and use as the chemical admixture of mixed material composition and increase the big speed of coagulating of grout.
Some chemical setting accelerator are well-known.They comprise alkali metal hydroxide, silicate, silicofluoride, calcium formiate, sodium-chlor, calcium chloride and nitrocalcite and calcium nitrite.
Calcium chloride because its preparation easily and cheap and it can predict and have many documents and materials to the influence of cement and be widely used.Yet be similar to sodium-chlor, it has the shortcoming of corrosion reinforcing bar.Like this, it can cause in concrete the corrosion to reinforcing steel bar.Other shortcomings during application comprise and reduce later stage ultimate compression strength, reduce the response to air, cause hardened concrete surface blister (Concrete Admixtures, Dodson:van NostrandReinhold, 1990).
So, the purpose of this invention is to provide novel setting accelerator, it can shorten the setting time of hydraulic cement composition when low temperature, and can not cause or quicken the corrosion to the reinforcing bar of refinforced cement.
Another object of the present invention provides this class cement composition method of preparation and the method that shortens the hydraulic cement composition setting time is provided.
The present invention relates to hydraulicity accelerator for cement slurry composition, also relate to the cement composition that contains this class admixture and the preparation method of described cement composition.Additive composition comprises the setting accelerator component and exists with significant quantity can increase the short C that coagulates performance of setting accelerator composition
2-C
6Polyvalent alcohol.The invention still further relates to the method for preparing hydraulic cement composition, its method comprises and adds the setting accelerator composition and can increase the short C that coagulates performance of setting accelerator composition with what significant quantity existed in the cement composition that comprises the hydraulic cement jointing compound
2-C
6Polyhydroxy reactant the present invention also relates to comprise hydraulic cement jointing compound, setting accelerator composition and can increase the short C that coagulates performance of setting accelerator composition with what significant quantity existed
2-C
6The cement composition of polyhydroxy reactant.Embodiment preferred of the present invention also comprises the ingredients of a mixture that is selected from alkanolamine and they.The general formula that such alkanolamine has is:
R wherein
1And R
2Be hydroxyalkyl, and be R
3Be hydrogen, hydroxyalkyl or alkyl.The particularly preferred embodiment of the present invention mainly consist of a) basic metal or alkaline earth metal nitrite; B) C
2-C
6Polyhydroxy reactant (as defined herein), the amount of its existence is for increasing the short amount of coagulating performance of setting accelerator composition effectively; C) C
1-C
5Alkyl diethanolamine and their mixture; And d) calcium chloride, bromide, iodide, prussiate, cyanate, trinitride, thiocyanate-, thiosulphate or perchlorate.
Have been found that and comprise that the short admixture that coagulates compound and low-molecular-weight polyvalent alcohol has excellent special efficacy for the setting time that shortens hydraulic cement composition.Also find such admixture under low working temperature, promptly be lower than about 50 °F also effective especially.These low molecular weight polyols have increased the short short performance of coagulating of coagulating compound obviously.In addition, admixture of the present invention can be prepared by this way, and promptly the composition that is generated can stop generally being embedded in the corrosion of the reinforcing steel bar in the cement composition.
Term " polyol " used herein is meant 2-6 carbon atom, i.e. " C
2-C
6" aliphatic dibasic alcohol or trivalent alcohol.Be applicable to that polyvalent alcohol of the present invention is as ethylene glycol, glycol ether, the material of propylene glycol and glycerol.Other compound that satisfies above definition is conspicuous for the professional and technical personnel.Up to the present, do not know that also these compounds have any short characteristic of coagulating, promptly they are to be used as grinding aid and retardant use at first.For this reason, people do not recognize that these compounds have any value as the part setting accelerator.Make that the inventor is taken aback be polyvalent alcohol described herein and setting accelerator compound common application the time, compare with the blood coagulation enhancing effect that joins independent setting accelerator in the cement composition to be obtained, it has increased significantly the short of cement composition has been coagulated.The present invention uses polyhydroxy reactant to obtain the short of cement composition to comprise that with fixed attention required " assist " is with fixed attention short like this.
Term used herein " cement composition " refers to grout, mortar and concrete composition, and it comprises the hydraulic cement jointing compound.Above-mentioned term is a technical term.Grout is by hydraulic cement jointing compound portland cement for example, separately or with flyash, silicon ash or blast-furnace slag combines and water is formed mixture; Mortar is to comprise that in addition the grout of fine aggregate and concrete are the mortars that comprises coarse aggregate in addition.This based composition also can comprise other additive such as defoamer in addition, air entrapment agent or getter, retardant, water reducer, superplasticizer and other those admixtures that are used to change the composition characteristic commonly known in the art.The preparation of cement composition of the present invention is by some material with requirement, as hydraulic cement, and water, thin or coarse aggregate mixes, and it can be used as the special cement composition.
The setting accelerator composition can be any compound, when it is added in the cement composition (as mentioned above), can shortens cement composition and harden the needed time.For example, spendable basic metal or alkaline earth salt are the salt of organic or inorganic acid.Although following catalogue does not also mean that restriction.But the example of compound is an alkali metal or alkaline earth metal nitrate like this, nitrite, and formate; The basic metal of seven races' halogen and pseudohalogen acid or alkaline earth salt, such as, basic metal or alkaline earth metal chloride, bromide, iodide, prussiate, cyanate, trinitride, and thiocyanate-; Basic metal or alkaline-earth metal thiosulphate and perchlorate; With basic metal or alkali earth metal aluminate, silicate, and oxyhydroxide are such as sodium hydroxide.Calcium salt is good especially, nitrocalcite particularly, calcium chloride, calcium formiate, and calcium nitrite.
The mixture of using basic metal or alkaline earth salt also is feasible, for example, and the mixture of nitrocalcite and calcium nitrite.Ratio between the used salt can be arbitrarily; Preferred spendable is the mixture of nitrocalcite/calcium nitrite, and its part by weight scope approximately is 1: 3-3: 1.The contriver finds to use nitrocalcite/calcium nitrite mixture and helps stoping to generally being embedded in the corrosion of the reinforcing steel bar in the cement composition as this class admixture of setting accelerator composition.
If join setting accelerator composition and polyhydroxy reactant in the cement composition respectively, the polyvalent alcohol that is added, with the solid is the general about 0.05%-1.0% of the being S/S (weight with hydraulic cement jointing compound in the cement composition is benchmark) of solid percentage amounts (" % S/S ") of benchmark, preferred range is about 0.1%-0.7% S/S, and such concentration generally can provide desirable acceleration to solidifying.The setting accelerator composition can be coagulating necessary usual amounts and add short, can be coagulating necessary usual amounts and add but coagulate the agent composition to short, but general big scope about 0.05%-4.0% S/S.(note.By using polyhydroxy reactant of the present invention.Also can reduce general requirement and reach certain short quantity of coagulating the setting accelerator composition of level, this is to provide blood coagulation enhancing effect preferably because of the combination by polyvalent alcohol and setting accelerator).
Yet the inventor finds, before joining polyhydroxy reactant and setting accelerator composition in the cement composition, preferably they and quantification on request closed.So only need measure a kind of composition and join in the cement composition.This than the method for the various compositions of independent adding simply and more accurate and reduced the wrong chance of the correct prescription of preparation.If setting accelerator composition and polyhydroxy reactant mixed before joining cement composition, polyhydroxy reactant and setting accelerator composition can be in any ratio effectively in conjunction with to obtain desired result.Generally, the amount of polyvalent alcohol can be about 0.05-40.0% (weight) in the mixture, is preferably about 0.5-40% (weight) (gross weight in polyhydroxy reactant and setting accelerator composition is a benchmark), preferably about 2-30% (weight).
Admixture of the present invention should be mixed in the hydraulic cement composition with its significant quantity, make it to reach desired solidifying.The unit consumption of admixture can easily be determined and will be depended on each components in proportions and desirable coagulation grade in cement composition, the composition.In general, the concentration that joins the polyvalent alcohol that the amount (as above said) of the admixture in the cement composition provided approximately is 0.05%-1.0% S/S, preferably about 0.1-0.75% S/S, in general such concentration can produce desirable accelerated solidification effect.
Particularly preferred embodiment of the present invention also comprises the ingredients of a mixture that is selected from alkanolamine and they.The general formula of such alkanolamine is
R wherein
1And R
2Be hydroxyalkyl, R
3Be hydrogen, hydroxyalkyl or alkyl.Preferred hydroxyalkyl is C
1-C
4Hydroxyalkyl, methylol for example, hydroxyethyl, hydroxypropyl, hydroxyl sec.-propyl, or hydroxyl butyl, more preferably C
1-C
3Hydroxyalkyl.R
3C preferably
1-C
5Alkyl is methyl for example, ethyl, propyl group, sec.-propyl, butyl, isobutyl-, amyl group, or isopentyl, more preferably C
1-C
3Alkyl.Particularly preferred alkanolamine is C
1-C
5Alkyl diethanolamine (that is R,
3Be C
1-C
5Alkyl such as methyl) such as being methyldiethanolamine, or ethyldiethanolamine.
Add such admixture composition, find that surprisingly the compressive strength rate that the hardening of cement body that is provided has does not comprise the hardening of cement height of embodiment of the present invention.In addition, be a) basic metal or alkaline earth metal nitrite main the composition in particularly preferred embodiment of the present invention; B) C
2-C
6Polyhydroxy reactant (as defined herein), its amount is for increasing the short amount of coagulating performance of setting accelerator composition effectively; C) C
1-C
5Alkyl diethanolamine and their mixture; D) calcium chloride, bromide, iodide, prussiate, cyanate, trinitride, thiocyanate-, thiosulphate or perchlorate like this, even can obtain higher ultimate compression strength.Because, well-known, halogenide, false halogenide has corrosive nature to the reinforcing steel bar that is embedded in the concrete, and meanwhile, finds that but application particularly preferred embodiment of the present invention can stop the corrosion in the hardening of cement body, and this is very astonishing.Also have, for the hardening of cement body, the present invention shows the ultimate compression strength that can increase all curing age surprisingly.
In general, the consumption of alkanolamine can be about 0.1-6.0% (weight) (gross weight in all active solid compositions in the admixture is a benchmark) in the admixture of the present invention, preferably approximately be 1.0-5.0% (weight), more preferably about 2.0-4.0% (weight).If join in the cement composition respectively, added to add composition (is the percent solids of benchmark in the solid) approximately be 0.005%-0.10% S/S (is benchmark with the hydraulic cement jointing compound in the cement composition), and preferred range approximately is 0.01%-0.08% S/S.In the described particularly preferred embodiment of the present invention of this section, admixture ingredient d) consumption can be about 0.5-15.0% (weight) (is benchmark in all active solid gross weights in the admixture), more preferably about 3.0-6.0% (weight).
Admixture of the present invention can any traditional mode be added in the cement composition in the prior art by being similar to.Admixture should mix very equably with cement composition.
Provide following examples and only play illustrative purposes, except as otherwise noted, all umbers and ratio are all by weight.
Embodiment 1
Preparation is made up of nitrocalcite and calcium nitrite, and ratio is 2: 1, the admixture of Yu Shuizhong.The total solids of admixture is 42.6%.
Embodiment 2
Preparation consists of by nitrocalcite, and calcium nitrite and glycerol are formed, and ratio is 2: 1: 1, (weight), the admixture of Yu Shuizhong.Admixture total solids 45%.
Embodiment 3
Admixture prepared in example 1 and the example 2 is added respectively in the mortar, and mortar is with I-II type portland cement, the sand preparation, water cement ratio is 0.45.Also prepare the blank mortar that does not contain admixture simultaneously.Every part of mortar is by the 4500g sand, 900g H
2O and 2000g cement machine in the Hobart stirrer stirs and makes.The embodiment 1 of adding q.s and 2 admixture solution are so that the admixture solids concn is 0.5% S/S and 2.0% S/S (is benchmark in the hydraulic cement weight in the mixture).Setting time is measured according to ASTMC 403, and the temperature of mensuration is 55 °F.
The data of table 1 show with different add-ons and add polyhydroxy reactant of the present invention (glycerol), have improved the accelerating chemicals compounds property under the situation of nitrocalcite and calcium nitrite mixture.
Embodiment 4
Preparation is by nitrocalcite, and calcium nitrite and glycerol are formed, and its ratio is 60: 16: 24 (weight), the admixture of the present invention of Yu Shuizhong.The admixture total solids is 45%.
Embodiment 5
The admixture that will prepare in embodiment 4 joins in the mortar, and mortar is that sand makes with three kinds of different I-II type portland cements (" cement 1,2 and 3 "), and water cement ratio is 0.45, does not also contain the blank mortar of admixture with various cement production.Every part of mortar is by the 4500g sand, and 900g water and 2000g cement evenly make in the Hobart stirrer for mixing.The admixture solution that adds the q.s of embodiment 4 is the admixture (weight with hydraulic cement in the mixture is benchmark) of 2.5%S/S so that solids concn to be provided.Setting time is measured according to ASTMC 403.Surveying periodic temperature is 40 °F.
The result of table 2 shows the characteristic of the setting time of three kinds of cement types.The cold property of data declaration accelerated cement admixture of the present invention.
Table 1
| Admixture among the embodiment | Presetting period (hour) | The presetting period variation (hour) |
| (blank) | 11.08 | - |
| 1 (in 0.5% S/S) | 8.94 | 2.14 |
| 2 (in 0.5% S/S) | 7.97 | 3.11 |
| 1 (in 2.0% S/S) | 5.05 | 6.03 |
| 2 (in 2.0% S/S) | 3.74 | 7.34 |
Table 2
| Admixture among the embodiment | Cement 1 | Cement 2 | Cement 3 | On average |
| (blank) | 9.50 | 11.40 | 10.18 | 10.36 |
| 4 | 7.50 | 8.57 | 8.33 | 8.16 |
Embodiment 5
Press table 3 preparation, the admixture of Yu Shuizhong according to the most preferred embodiment of the present invention.All data are that the gross weight in all active solid compositions in the admixture is the weight percent of each composition of admixture of benchmark.
Table 3
| Sample 1 | Sample 2 | Sample-3a | Sample-3b | Sample-3c | |
| Ca(NO 2) 2 | 43.9 | 42.0 | 42.0 | 41.8 | 38.3 |
| Ca(NO 3) 2 | 43.7 | 42.0 | 42.0 | 41.8 | 38.3 |
| Glycol ether | 10.0 | 8.0 | 9.5 | 8.0 | 8.0 |
| Methyldiethanolamine | - | 6.0 | 6.0 | 3.0 | 3.0 |
| The naphthalene sulphonate formaldehyde polycondensate | 2.4 | 2.0 | 0.5 | 0.4 | 4.0 |
| CaBr 2 | - | - | - | 5.0 | 12.0 |
Embodiment 6
Under the condition similar, measure the characteristic of admixture SA-1 and SA-2 with cement with five kinds of laboratories to embodiment 3.Mixing temperature is 60 and mortar sclerosis under 40.The data that are shown in table 4 illustrate that clearly the admixture that contains alkanolamine of the present invention has produced good 7-28 days ultimate compression strength.
Table 4
| Ultimate compression strength (psi) | |||||
| Setting time (hour, minute) | Oz/cwt + | 2-3 days | 7 days | 28 days | |
| Contrast | 13.67 | - | 880 | 2270 | 3330 |
| SA-1 | 10.05 | 30.0 | 1020 | 2450 | 3720 |
| SA-2 | 10.15 | 30.0 | 840 | 2610 | 3840 |
+ fluidounce admixture/1001bs cement
Embodiment 7
The alkaline earth metal halides (Calcium Bromide) that contain different amounts, SA-3b and SA-3C, the performance of admixture measure with cement with three kinds of laboratories that resemble embodiment 6.Mixing temperature is 72 °F and uses cement 20 sclerosis down.As shown in table 5, add CaBr in addition
2Clearly favourable to improving early anti pressured intension (3 days); Like this, add this admixture in concrete, increased the ultimate compression strength of all maintenance phases.
Table 5
| Ultimate compression strength (psi) | ||||
| Setting time (hour. minute) | oz/cwt | 3 days | 28 days | |
| Contrast | Do not solidify (freezing) | - | - | - |
| SA-3a | 5.49 | 75 | 262 | 4041 |
| SA-3b | 4.06 | 75 | 588 | 5060 |
| SA-3c | 4.78 | 75 | 701 | 4494 |
The description of front of the present invention is for the present invention being described rather than in order to limit the present invention.The inventor points out various modifications within the scope of the appended claims or changes all without prejudice to spirit of the present invention.
Claims (17)
1. a shortening includes the admixture of setting time of the cement composition of hydraulic cement jointing compound, and described admixture comprises:
A) be selected from the setting accelerator composition of following composition: alkali metal or alkaline earth metal nitrate, nitrite, and formate; The thiosulphate of the basic metal of seven races' halogen and pseudohalogen acid or alkaline earth salt, basic metal or alkaline-earth metal or perchlorate, basic metal or alkali earth metal aluminate, silicate, and oxyhydroxide, with their mixture, its usage quantity is for being benchmark with the weight of hydraulic cement jointing compound in the processed cement composition, and is that the solid percentage amounts of benchmark is counted 0.05%-4.0% weight by solid;
B) be defined as the aliphatic diol that contains 2-6 carbon atom and the C of trivalent alcohol
2-C
6Polyhydroxy reactant, its amount is a benchmark with the gross weight of polyhydroxy reactant in cement composition and setting accelerator composition, and is that the solid percentage amounts of benchmark is counted 0.05-40.0% weight by solid; With
C) be selected from alkanolamine and their the ingredients of a mixture, the general formula that said alkanolamine has is
Wherein, R
1And R
2Be hydroxyalkyl, R
3Be hydrogen, hydroxyalkyl or alkyl, its consumption is that benchmark is counted 0.1-6.0% weight with the gross weight of all active solid compositions in the admixture.
2. the admixture of claim 1, wherein the content of the said polyvalent alcohol in said admixture is the 0.5-40% weight of benchmark for the gross weight of polyhydroxy reactant in said admixture and setting accelerator composition.
3. the admixture of claim 1, wherein the content of the said polyvalent alcohol in said admixture is the 2.0-30% weight of benchmark for the gross weight of polyhydroxy reactant in said admixture and setting accelerator composition.
4. the admixture of claim 1, basic metal or alkaline earth salt that wherein said setting accelerator composition is organic acid or mineral acid, or their mixture.
5. the admixture of claim 1, wherein said setting accelerator composition is selected from nitrocalcite, calcium nitrite and their mixture.
6. the admixture of claim 5, wherein R
3Be methyl, ethyl, propyl group, sec.-propyl, butyl, isobutyl-, amyl group or isopentyl.
7. the admixture of claim 5, wherein R
3Be methyl, ethyl, propyl group, or sec.-propyl.
8. the admixture of claim 7, wherein R
1And R
2Be respectively methylol, hydroxyethyl, hydroxypropyl, hydroxyl sec.-propyl, or hydroxyl butyl.
9. the admixture of claim 3, the wherein said composition c in said admixture) content be that gross weight with all active solid compositions in the said admixture is the 1.0-5.0% (weight) of benchmark.
10. the admixture of claim 3, the wherein said composition c in said admixture) content be that gross weight with all the active solid compositions in the said admixture is the 2.0-4.0% (weight) of benchmark.
11. the admixture of claim 1, wherein said C
2-C
6Polyhydroxy reactant be selected from ethylene glycol.Glycol ether, propylene glycol, and glycerol.
12. be used to shorten the admixture of the cement composition setting time that comprises the hydraulic cement jointing compound, said admixture is mainly formed and is
A) be selected from basic metal, or alkine earth metal nitrate, the setting accelerator composition of nitrite and formate; Its usage quantity is for being benchmark with the weight of hydraulic cement jointing compound in the processed cement composition, and is that the solid percentage amounts of benchmark is counted 0.05%-4.0% weight by solid;
B) be defined as the aliphatic diol that contains 2-6 carbon atom and the C of trivalent alcohol
2-C
6Polyhydroxy reactant, its amount is a benchmark with the gross weight of polyhydroxy reactant in cement composition and setting accelerator composition, and is that the solid percentage amounts of benchmark is counted 0.05-40.0% weight by solid; With
C) be selected from alkanolamine and their the ingredients of a mixture, the general formula that said alkanolamine has is
Wherein, R
1And R
2Be hydroxyalkyl, R
3Be hydrogen, hydroxyalkyl or alkyl, its consumption is that benchmark is counted 0.1-6.0% weight with the gross weight of all active solid compositions in the admixture; With
D) basic metal and the alkaline earth salt of seven races' halogen and pseudohalogen acid; Basic metal or alkaline-earth metal thiosulphate and perchlorate; Basic metal or alkali earth metal aluminate; Silicate, and oxyhydroxide; With their mixture, its consumption is that benchmark is counted 0.5-15% weight with the gross weight of the active solid composition that contained in the admixture of cement composition.
13. the admixture of claim 12, wherein R
3Be methyl, ethyl, propyl group, sec.-propyl, butyl, isobutyl-, amyl group and isopentyl.
14. the admixture of claim 12, wherein R
3Be methyl, ethyl, propyl group, or sec.-propyl.
15. the admixture of claim 12, wherein R
1And R
2Be respectively methylol, hydroxyethyl, hydroxypropyl, the different base of hydroxyl, or hydroxyl butyl.
16. the admixture of claim 12, the wherein said ingredient d in said admixture) content be that gross weight with all the active solid compositions in said admixture is the 1.0-5.0% weight of benchmark.
17. be used to shorten the prevention corrosion of the setting time of the cement composition that contains the hydraulic cement binding agent, setting accelerator, said admixture comprise the setting accelerator composition of following composition:
A) be selected from the setting accelerator composition of following composition: alkali metal or alkaline earth metal nitrate, nitrite, and formate; The thiosulphate of the basic metal of seven races' halogen and pseudohalogen acid or alkaline earth salt, basic metal or alkaline-earth metal or perchlorate, basic metal or alkali earth metal aluminate, silicate, and oxyhydroxide, with their mixture, its usage quantity is for being benchmark with the weight of hydraulic cement jointing compound in the processed cement composition, and is that the solid percent by weight of benchmark is counted 0.05%-4.0% weight by solid;
B) be defined as the aliphatic diol that contains 2-6 carbon atom and the C of trivalent alcohol
2-C
6Polyhydroxy reactant, its amount is a benchmark with the gross weight of polyhydroxy reactant in cement composition and setting accelerator composition, and is that the solid percentage amounts of benchmark is counted 0.05-40.0% weight by solid; With
C) be selected from alkanolamine and their the ingredients of a mixture, the general formula that said alkanolamine has is
Wherein, R
1And R
2Be hydroxyalkyl, R
3Be hydrogen, hydroxyalkyl or alkyl, its consumption is that benchmark is counted 0.1-6.0% weight with the gross weight of all active solid compositions in the admixture.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/125,905 US5348583A (en) | 1992-01-28 | 1993-09-24 | Hydraulic cement set-accelerating admixtures incorporating glycols |
| US125,905 | 1993-09-24 | ||
| US125905 | 1993-09-24 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94113758A Division CN1041708C (en) | 1993-09-24 | 1994-09-23 | Hydraulic cement set-accelerating admixtures incorporating glycols |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1216293A CN1216293A (en) | 1999-05-12 |
| CN1094477C true CN1094477C (en) | 2002-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94113758A Expired - Fee Related CN1041708C (en) | 1993-09-24 | 1994-09-23 | Hydraulic cement set-accelerating admixtures incorporating glycols |
| CN98106335A Expired - Fee Related CN1094477C (en) | 1993-09-24 | 1998-04-03 | Set-accelerating admixture for hydraulic cement composition |
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| CN94113758A Expired - Fee Related CN1041708C (en) | 1993-09-24 | 1994-09-23 | Hydraulic cement set-accelerating admixtures incorporating glycols |
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| GB0304158D0 (en) * | 2003-02-25 | 2003-03-26 | Mbt Holding Ag | Admixture |
| WO2005092818A1 (en) * | 2004-03-19 | 2005-10-06 | James Hardie International Finance B.V. | Multiple mode accelerating agent for cementitious materials |
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| CN106746838A (en) * | 2016-11-28 | 2017-05-31 | 欧阳会幼 | A kind of aluminate modified high-efficient liquid accelerator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63319235A (en) * | 1987-06-19 | 1988-12-27 | Masanori Araki | Admixture for mortar or concrete |
| US4888059A (en) * | 1986-12-25 | 1989-12-19 | Dainippon Ink And Chemicals, Inc. | Cement dispersing agent |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4909849A (en) * | 1987-04-23 | 1990-03-20 | Funderburk Raymond E | Method and mixture for solidifying and immobilizing various hazardous waste contaminants in an organic matrix |
-
1994
- 1994-09-23 CN CN94113758A patent/CN1041708C/en not_active Expired - Fee Related
-
1998
- 1998-04-03 CN CN98106335A patent/CN1094477C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4888059A (en) * | 1986-12-25 | 1989-12-19 | Dainippon Ink And Chemicals, Inc. | Cement dispersing agent |
| JPS63319235A (en) * | 1987-06-19 | 1988-12-27 | Masanori Araki | Admixture for mortar or concrete |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1216293A (en) | 1999-05-12 |
| CN1041708C (en) | 1999-01-20 |
| CN1107127A (en) | 1995-08-23 |
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