CN102923988A - Liquid alkali-free chloride-free accelerating agent as well as methods for preparing and using same - Google Patents
Liquid alkali-free chloride-free accelerating agent as well as methods for preparing and using same Download PDFInfo
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- CN102923988A CN102923988A CN2012104957554A CN201210495755A CN102923988A CN 102923988 A CN102923988 A CN 102923988A CN 2012104957554 A CN2012104957554 A CN 2012104957554A CN 201210495755 A CN201210495755 A CN 201210495755A CN 102923988 A CN102923988 A CN 102923988A
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Abstract
The invention discloses a liquid alkali-free chloride-free accelerating agent and methods for preparing and using the same. Raw materials for preparing the accelerating agent include one or a plurality of the following components of aluminum sulfate, magnesium sulfate, hydramine, an early strength agent, a synergist and water. The aluminum sulfate is the purchasable industrial-grade aluminum sulfate hydrate Al2(SO4)3.18H2O and has the solid content of 51%-52%. The magnesium sulfate is MgSO4.7H2O with the solid content of 48%-49%. The hydramine is one or a plurality of mono ethanol amine, diethanolamine, triethanolamine or isopropoxide. The early strength agent is one or a plurality of calcium sulfate, calcium formate or calcium nitrite. The synergist is magnesium fluosilicate and/or magnesium fluoride. The liquid alkali-free chloride-free accelerating agent provided by the invention has the characteristics of good adaptability, low price, low mixing amount, good performance, good stability and the like; and moreover, the liquid alkali-free chloride-free accelerating agent is added into the concrete to be used as sprayed concrete, has the characteristics of low resilience, small dust pollution and the like and can satisfy the requirements of the 'JC477-2005 sprayed concrete accelerating agent' standard.
Description
Technical field
The present invention relates to concrete additive chemical engineering of materials technical field, particularly a kind of alkali-free liquid setting accelerator and preparation thereof built in worker, China Democratic National Construction Association, the use of the sprayed concrete in the engineering such as tunnel.
Background technology
Cement hardener (hereinafter to be referred as accelerating chemicals) also claims setting accelerator, is a kind of chemical admixture that can promote cement or concrete rapid coagulation, at engineering bolting and shotcreting such as mine working, tunnels, and is used widely in leak stopping and the salvaging.
The concrete spraying support technology is applied widely in underground and Tunnel Engineering.Simultaneously the sprayed concrete performance is also had higher requirement, should avoid the spray-up landing during such as injection, increase the thickness of a sprayed concrete as far as possible, reduce concrete springback, reduce dust pollution etc.For satisfying above-mentioned requirements, concrete sprayed construction develops to wet spraying process.
The accelerating chemicals of present domestic use, most of take aluminate, carbonate and silicate as main component, the powder accelerator that is composited with other inorganic salts again, these accelerating chemicalss alkalescence is large, resilience is large, workmen's eyes and skin is had corrosive nature, also cause easily concrete " dodging solidifying ", affect the aquation structure of Behavior of Hardened Cement Paste, cause late strength of concrete to reduce.In addition, powder accelerator has and adds inhomogeneous shortcoming when the concrete spraying operation.If the employing liquid accelerator, its even effect will have the variation of matter.In addition, contain chlorine in the accelerating chemicals, can cause corrosive nature to the reinforcing bar in the concrete, affect concrete quality and work-ing life.
Summary of the invention
Technical problem to be solved by this invention is, provide that a kind of cement adaptability is good, cheap, functional, stability preferably alkali-free chlorine-free liquid accelerator and preparation method, add in the concrete as the application of sprayed concrete in the engineering bolting and shotcreting such as mine working, tunnel and leak stopping and salvaging, alkali-free chlorine-free accelerating chemicals of the present invention can be used for the collapsible loess slope protection works.
Technical scheme of the present invention is: provide a kind of alkali-free liquid without the chlorine accelerating chemicals, its raw materials comprises one or more in the following component: Tai-Ace S 150, sal epsom, hydramine, hardening accelerator, synergistic agent, water.
Described sal epsom is preferably the MgSO of solid content 48%～49%
4.7H
2O.
Described hydramine can be Monoethanolamine MEA BASF, diethanolamine, trolamine or three Virahols, in one or more.
Described hardening accelerator can be calcium sulfate, calcium formiate or calcium nitrite, in one or more.
Described synergistic agent can be magnesium silicofluoride and/or magnesium fluoride.
Described alkali-free liquid is preferably formulated by weight by following composition without the chlorine accelerating chemicals:
Tai-Ace S 150: 38～60%
Sal epsom: 0～20%
Hydramine: 2～12%
Hardening accelerator: 0～3%
Synergistic agent: 3～10%
All the other are water.
For solving the problems of the technologies described above, the present invention also provides the preparation method of a kind of described alkali-free liquid without the chlorine accelerating chemicals, may further comprise the steps: add first entry, add synergistic agent again and stir; Add successively hydramine, Tai-Ace S 150, sal epsom, hardening accelerator, mix, need not high speed dispersion, namely get evenly, stable product.
Among the described preparation method, described Tai-Ace S 150 can be commercially available technical grade hydrazine aluminum sulfate Al for described Tai-Ace S 150
2(SO
4)
3.18H
2O, solid content 51%～52%, and first Tai-Ace S 150 is ground before using, cross 200 purpose sieves, the powder that passes through is used for preparing accelerating chemicals.
For solving the problems of the technologies described above, the present invention provides again the using method of a kind of described alkali-free liquid without the chlorine accelerating chemicals, and described alkali-free liquid is used for sprayed concrete without the chlorine accelerating chemicals with liquid form.
In the described using method, described alkali-free liquid is made benchmark without chlorine accelerating chemicals consumption with cement weight, and volume is 3.5%～8%.
The technique effect that the present invention is useful is: alkali-free liquid provided by the invention without the chlorine accelerating chemicals have that adaptability is good, cheap, volume is low, functional, the characteristics such as stability is better, add to simultaneously in the concrete and have the characteristics such as rebound degree is low, dust pollution is little as sprayed concrete, can satisfy the demand of " JC477-2005 shotcrete accelerator " standard.
Embodiment
The present invention includes but be not limited to following embodiment, hereinafter illustrated embodiment understands the specific embodiment of the present invention specifically.
Alkali-free liquid of the present invention is without the chlorine accelerating chemicals, and is formulated by weight by following composition:
Tai-Ace S 150: 38～60%, sal epsom: 0～20%, hydramine: 0～5%, hardening accelerator: 0～3%, synergistic agent: 3～10%, all the other are water.
This alkali-free liquid setting accelerator is prepared from accordance with the following methods: add first entry, add synergistic agent again and stir, add successively hydramine, Tai-Ace S 150, sal epsom, hardening accelerator etc., mix, need not high speed dispersion, namely get evenly, stable product 6 months quality guaranteed perioves.
Alkali-free liquid setting accelerator of the present invention, described Tai-Ace S 150 are commercially available technical grade hydrazine aluminum sulfate Al
2(SO
4)
3.18H
2O, solid content 51%～52%.
Alkali-free liquid setting accelerator of the present invention, described sal epsom are commercially available technical grade bitter salt (MgSO
4.7H
2O), solid content 48%～49%.
Alkali-free liquid setting accelerator of the present invention, described hydramine are Monoethanolamine MEA BASF, diethanolamine, trolamine or aforementioned any two or more mixtures.
Alkali-free liquid setting accelerator of the present invention, described hardening accelerator are calcium sulfate, calcium formiate, calcium nitrite.
Alkali-free liquid setting accelerator of the present invention, described synergistic agent are the inorganic salts synergistic agent, such as in magnesium silicofluoride, the magnesium fluoride one or both.
Alkali-free liquid setting accelerator of the present invention is characterized in that: the optimum amount of described synergistic agent is 3～6%.
Alkali-free liquid setting accelerator of the present invention is characterized in that: described alkali-free liquid setting accelerator is used for sprayed concrete with liquid form.
Alkali-free liquid setting accelerator of the present invention is characterized in that: described alkali-free liquid setting accelerator consumption is made benchmark with cement weight, and volume is 3.5%～10%, meets the requirement of " JC477-2005 shotcrete accelerator " standard through check.
Alkali-free liquid of the present invention can also be formulated by weight by following composition without the chlorine accelerating chemicals:
Tai-Ace S 150: 40～58%, sal epsom: 0～18%, hydramine: 0～6%, hardening accelerator: 0～4%, synergistic agent: 4～12%, all the other are water.
Alkali-free liquid of the present invention also can be formulated by weight by following composition without the chlorine accelerating chemicals:
Tai-Ace S 150: 36～55%, sal epsom: 0～22%, hydramine: 0～4%, hardening accelerator: 0～5%, synergistic agent: 2～14%, all the other are water.
Following compositions is added in the reactor in order successively, fully dissolve, mix, namely get product.
Embodiment 1:
Water: 50
Tai-Ace S 150: 38
Diethanolamine: 2
Calcium formiate: 0.1
Magnesium silicofluoride: 10
Embodiment 2:
Water: 30
Tai-Ace S 150: 60
Bitter salt: 5
Trolamine: 2
Calcium sulfate: 3
Magnesium fluoride: 3
Embodiment 3:
Water: 25
Tai-Ace S 150: 45
Bitter salt: 20
Diethanolamine: 5
Calcium nitrite: 1
Magnesium fluoride: 3
Embodiment 4:
Water: 47
Tai-Ace S 150: 36
Sal epsom: 1
Trolamine: 12
Magnesium silicofluoride: 4
Comparative examples 1:
Water: 35
Tai-Ace S 150: 55
Bitter salt: 1
Diethanolamine: 3
Calcium nitrite: 1
Magnesium silicofluoride: 5
Magnesium fluoride: 1
Application Example 1
Measure time of coagulation:
Clean slurry forms and is comprised of material beneath:
Reference cement 400g
Water 160ml
Strength detection:
The mortar constituent is comprised of material beneath:
900 parts of reference cements
1350 parts of standard sands
450 parts in water
Above water comprises the water in the accelerating chemicals.According to Chinese building material industry standard JC477-2005, with embodiment 1～4,8% the volume that every kind of accelerating chemicals of comparative examples 1 is pressed respectively cement weight adds in the mortar specimen, simultaneously the commercially available ky-1 that buys is tested 1 day intensity and 28 days strength ratios of test sample by 10% volume of cement weight.The result is as follows:
Can find out that by upper table embodiment 1～4 and comparative examples 1 all can satisfy the requirement of JC477-2005.And various aspects of performance all is better than the ky-1 accelerating chemicals that is purchased, illustrates that alkali-free liquid accelerator of the present invention is functional, satisfies standard-required.
Application Example 2:
Present embodiment is the contrast between the present invention and the immediate prior art!
According to number of patent application: the following accelerating chemicals a1 of 200610098296.0 described preparation methods, a2, a3, a4.
The preparation method is as follows:
A1: following each composition added in the mixing machine successively mix, disperse:
Tai-Ace S 150: 52
Magnesium sulfate heptahydrate: 18
Diethanolamine: 6
Water: 24
A2: following each composition added in the mixing machine successively mix, disperse:
Tai-Ace S 150: 48
Magnesium sulfate heptahydrate: 18
Diethanolamine: 7
TX10： 1
Defoamer: 0.1
Water: 25.9
A3: following each composition added in the mixing machine successively mix, disperse:
Tai-Ace S 150: 57
Magnesium sulfate heptahydrate: 11
Diethanolamine: 5
Glycerine: 1.0
Water: 26.2
A4: following each composition added in the mixing machine successively mix, disperse:
Tai-Ace S 150: 45
Magnesium sulfate heptahydrate: 18
Diethanolamine: 7
TX10： 1
Water: 25.9
With accelerating chemicals a1, a2, a3, a4, embodiment 1, and embodiment 2, and embodiment 3, and embodiment 4, and comparative examples 1 is carried out simultaneously time of coagulation and is measured and strength detection:
Measure time of coagulation:
Clean slurry forms and is comprised of material beneath:
Gold corner general silicon PO42.5 cement: 400g
Water: 160ml
Strength detection:
The mortar constituent is comprised of material beneath:
Gold corner general silicon PO42.5 cement: 900 parts
Standard sand: 1350 parts
Water: 450 parts
Above water comprises the water that contains in the accelerating chemicals.According to Chinese building material industry standard JC477-2005, with embodiment 1～4,8% the volume that every kind of accelerating chemicals of comparative examples 1 is pressed respectively cement weight adds in the mortar specimen, 10% the volume that a1～a4 presses cement weight adds in the mortar specimen, volume is tested, 1 day intensity and 28 days strength ratios of test sample.The result is as follows:
Can see that by above-mentioned data comparative examples 1～4, comparative examples 1 be according to 8% volume, performance index all are better than a1～a4 according to 10% volume.
All are above-mentioned to be the primary implementation method of this intellecture property, does not set restriction and implements this novel method and/or product innovation with other forms.Those skilled in the art will utilize this important information, foregoing be revised, to realize similar implementation status.But all are based on modification of the present invention or transform novel method, belong to the right of reservation.
The above only is preferred embodiment of the present invention, is not to be the restriction of the present invention being made other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not break away from according to any simple modification, equivalent variations and the remodeling that technical spirit of the present invention is done above example, still belongs to the protection domain of technical solution of the present invention.
Claims (10)
1. an alkali-free liquid is characterized in that without the chlorine accelerating chemicals, and its raw materials comprises one or more in the following component: Tai-Ace S 150, sal epsom, hydramine, hardening accelerator, synergistic agent, water.
2. described alkali-free liquid is characterized in that without the chlorine accelerating chemicals according to claim 1: described sal epsom is the MgSO of solid content 48%～49%
4.7H
2O.
3. described alkali-free liquid is characterized in that without the chlorine accelerating chemicals according to claim 1 and 2: described hydramine is: Monoethanolamine MEA BASF, diethanolamine, trolamine or three Virahols, in one or more.
4. each described alkali-free liquid is characterized in that without the chlorine accelerating chemicals according to claim 1～3: described hardening accelerator is calcium sulfate, calcium formiate or calcium nitrite, in one or more.
5. each described alkali-free liquid is characterized in that without the chlorine accelerating chemicals according to claim 1～4: described synergistic agent is magnesium silicofluoride and/or magnesium fluoride.
6. each described alkali-free liquid is characterized in that without the chlorine accelerating chemicals according to claim 1～5: described alkali-free liquid is formulated by weight by following composition without the chlorine accelerating chemicals:
Tai-Ace S 150: 38～60%
Sal epsom: 0～20%
Hydramine: 2～12%
Hardening accelerator: 0～3%
Synergistic agent: 3～10%
All the other are water.
One kind as in the claim 1～6 as described in each alkali-free liquid it is characterized in that without the preparation method of chlorine accelerating chemicals, may further comprise the steps: add first entry, add again synergistic agent and stir; Add successively hydramine, Tai-Ace S 150, sal epsom, hardening accelerator, mix, need not high speed dispersion, namely get evenly, stable product.
8. described preparation method according to claim 7 is characterized in that described Tai-Ace S 150 is commercially available technical grade hydrazine aluminum sulfate Al
2(SO
4)
3.18H
2O, solid content 51%～52%; And first Tai-Ace S 150 is ground before using, cross 200 purpose sieves, the powder that passes through is used for preparing accelerating chemicals.
One kind as claim 1～6 as described in each alkali-free liquid it is characterized in that without the using method of chlorine accelerating chemicals described alkali-free liquid is used for sprayed concrete without the chlorine accelerating chemicals with liquid form.
10. described using method according to claim 9, it is characterized in that: described alkali-free liquid is made benchmark without chlorine accelerating chemicals consumption with cement weight, and volume is 3.5%～8%.
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Application publication date: 20130213 |