CN104193211A - Heating-free non-alkali liquid accelerator for jetting concrete and preparation method of heating-free non-alkali liquid accelerator - Google Patents
Heating-free non-alkali liquid accelerator for jetting concrete and preparation method of heating-free non-alkali liquid accelerator Download PDFInfo
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- CN104193211A CN104193211A CN201410405775.7A CN201410405775A CN104193211A CN 104193211 A CN104193211 A CN 104193211A CN 201410405775 A CN201410405775 A CN 201410405775A CN 104193211 A CN104193211 A CN 104193211A
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- 239000007788 liquid Substances 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000003513 alkali Substances 0.000 title abstract description 17
- 239000004567 concrete Substances 0.000 title abstract description 13
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 54
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 52
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 26
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims abstract description 23
- 159000000003 magnesium salts Chemical class 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 5
- 239000011378 shotcrete Substances 0.000 claims description 30
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 6
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- 229920002310 Welan gum Polymers 0.000 claims description 5
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 5
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000391 magnesium silicate Substances 0.000 claims description 5
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 5
- 235000019792 magnesium silicate Nutrition 0.000 claims description 5
- 229960004418 trolamine Drugs 0.000 claims description 5
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 235000011128 aluminium sulphate Nutrition 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 235000011837 pasties Nutrition 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 2
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 2
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- ZZVUWRFHKOJYTH-UHFFFAOYSA-N diphenhydramine Chemical compound C=1C=CC=CC=1C(OCCN(C)C)C1=CC=CC=C1 ZZVUWRFHKOJYTH-UHFFFAOYSA-N 0.000 claims 7
- 239000004568 cement Substances 0.000 abstract description 18
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 150000001412 amines Chemical class 0.000 abstract 2
- 239000012295 chemical reaction liquid Substances 0.000 abstract 2
- 239000003381 stabilizer Substances 0.000 abstract 2
- 230000001502 supplementing effect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 16
- PCHPORCSPXIHLZ-UHFFFAOYSA-N diphenhydramine hydrochloride Chemical compound [Cl-].C=1C=CC=CC=1C(OCC[NH+](C)C)C1=CC=CC=C1 PCHPORCSPXIHLZ-UHFFFAOYSA-N 0.000 description 9
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 229910001388 sodium aluminate Inorganic materials 0.000 description 6
- 239000000701 coagulant Substances 0.000 description 5
- 230000015271 coagulation Effects 0.000 description 5
- 238000005345 coagulation Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229940037003 alum Drugs 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005526 G1 to G0 transition Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- -1 aluminum ion Chemical class 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 description 1
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 159000000013 aluminium salts Chemical class 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005185 salting out Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a heating-free non-alkali liquid accelerator for jetting concrete and a preparation method of the heating-free non-alkali liquid accelerator. The liquid accelerator is prepared from the following components in percentage by mass: 30%-55% of aluminum sulfate, 3%-10% of aluminium hydroxide, 10%-18% of hydrofluoric acid, 8%-25% of magnesium salt, 1%-8% of alkylol amine, 0.5%-4% of a stabilizer, and 10%-33% of water. The preparation method is characterized by comprising the following processing steps: putting aluminium hydroxide into a reaction kettle; adding water to the reaction kettle, and stirring aluminium hydroxide into paste; slowly adding hydrofluoric acid, and when the temperature reaches 50-55 DEG C, adding aluminum sulfate to stir in batches; after hydrofluoric acid is completely added, adding residual aluminum sulfate and supplementing residual water, so as to obtain reaction liquid; adding the magnesium salt to the reaction liquid, and then adding the alkylol amine and the stabilizer, so that the solution becomes evenly mixed liquid. The accelerator disclosed by the invention has strong adaptability with cement, low energy consumption and good performance, and does not need to be heated in the use procedure.
Description
Technical field
The present invention relates to a kind of concrete admixture, be specifically related to a kind of wet spraying process the reinforcement of concrete alkali-free liquid accelerator, belong to building material technical field, particularly sprayed concrete is with exempting to heat an alkali-free liquid accelerator, the alkali-free liquid accelerator in especially a kind of tunnel and tunnel wet shotcreting.The invention still further relates to the preparation method of described liquid accelerator.
Background technology
Accelerating chemicals is the admixture that makes cement rapid coagulation sclerosis, is mainly used in construction of shotcrete.In the engineering construction such as tunnel, underground mine; Construction of shotcrete has the unrivaled superiority of normal concrete, has become the necessary measure of this type of engineering.The effect of accelerating chemicals is the setting and harden of accelerating sprayed concrete, improves its early strength, like this for rapid construction is laid a good foundation.
The development of wet-spray technique in recent years, has expanded the use range of sprayed concrete.Include alkali accelerating chemicals and alkali-free quick-coagulant for the liquid accelerator of wet shotcreting, should be used for seeing from it following problem that exists: alkali content is high, 28d (28 days) strength ratio reduces, stationary phase is short, energy consumption is high production process.
Generally speaking, alkali content is called alkali-free quick-coagulant lower than 1% accelerating chemicals, in existing technique, has the alkali content of alkali accelerating chemicals generally more than 18%; The alkali content major part of low alkali accelerating chemicals exceedes 6%; And some alkali-free quick-coagulant has been introduced sodium/potassium ion in filling a prescription, actual alkali content is often higher than 1%; The accelerating chemicals of high alkali content mixes in concrete and can 28d strength ratio be reduced the concrete later strength of impact, has so just directly affected the weather resistance of concrete structure, is unfavorable for the control of construction quality.
Use the accelerating chemicals of aluminium salt due to hydrolysis and solubility, in various degree there is sedimentation, the crystallization problem in the shelf lives, effective concentration is reduced, affected the result of use of accelerating chemicals.In existing explained hereafter, no matter there is in alkali or alkali-free quick-coagulant production process the heating that needs in various degree, the requirement to equipment and energy consumption are higher like this, may face environmental problem and affect production in some areas.
Contriver retrieves following patent documentation: CN102219425A discloses a kind of alkali-free liquid accelerating agent and preparation method thereof, described alkali-free liquid accelerating agent, adopt Tai-Ace S 150 as main rapid hardening composition, add alum liquor to carry out polymerization with the form of aluminum fluoride in aluminium, reach maximum introducing aluminum ion and reduce the object that other ion is introduced, ensure rapid hardening effect; The component of alkali-free liquid accelerating agent and mass percent are: Tai-Ace S 150: 30～55%, and aluminium hydroxide: 5～15%, hydrofluoric acid: 10～30%, water glass: 0.5～5%, stablizer: 0～0.2%, rest part is water.CN102249592A discloses high early strong liquid accelerator of a kind of alkali-free chlorine-free and preparation method thereof, the high early strong liquid accelerator of alkali-free chlorine-free is synthesized by Tai-Ace S 150, alkaline earth salt, aluminium hydroxide, hydroxycarboxylic acid, organic amine compound, stablizer, be characterised in that and adopted organic amine compound and poly-hydroxy organism and inorganic salt generation complex reaction, by regulating the ratio of raw material to adjust the molecular structure of product, to improve the performance of product.CN102219426A discloses a kind of low-alkaline liquid accelerating agent and preparation method thereof.Described low-alkaline liquid accelerating agent, with in alum liquor and sodium aluminate solution and generate aluminum hydroxide sol, in original solution system, form polyaluminium sulfate with aluminum hydroxide sol polyreaction with Tai-Ace S 150 again, make accelerating chemicals solution solution there is higher aluminium composition and liquid stability; Described low-alkaline liquid accelerating agent is made up of Tai-Ace S 150, sodium aluminate and stablizer; The mass percent of each composition is: Tai-Ace S 150 40～60%, and sodium aluminate 6～12%, stablizer 0～0.2%, rest part is water.
These technology, for how making liquid accelerator and cement have in stronger adaptability, use procedure without heating and functional, do not provide concrete guidance program above.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of sprayed concrete with exempting to heat alkali-free liquid accelerator, and this liquid accelerator and cement have stronger adaptability, and in use procedure, without heating, energy consumption is low, functional.
For this reason, the present invention also will provide the described preparation method who exempts to heat alkali-free liquid accelerator for sprayed concrete.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A kind of sprayed concrete is with exempting to heat alkali-free liquid accelerator, and its technical scheme is that it is to be made up of the raw material of following component and mass percent: Tai-Ace S 150 30%～55%; Aluminium hydroxide 3%～10%; Hydrofluoric acid 10%～18%; Magnesium salts 8%～25%; Hydramine 1%～8%; Stablizer 0.5%～4%; Water 10%～33%, the mass percent sum of above-mentioned each component is 100%; Described magnesium salts is the one in industrial magnesium silicofluoride, magnesium sulfate, Magnesium Silicate q-agent; Described stablizer is the one in welan gum, non-ionic polyacrylamide, EDTA.
In technique scheme, in described Tai-Ace S 150, the content of aluminum oxide can be 16%～17%, can adopt industrial ferrous contained or non-iron aluminium sulfate, in order to improve dissolution rate, need be crushed to below 1mm, described like this Tai-Ace S 150 is for being crushed to (diameter is) 1mm or particle below 1mm.Above-mentioned aluminium hydroxide can be technical grade amorphous hydroted alumina.Above-mentioned hydrofluoric acid can be technical grade hydrofluoric acid solution, requires HF content >=40%.Above-mentioned hydramine is the one in diethanolamine, trolamine, tri-isopropanolamine.
Sprayed concrete of the present invention can be that the raw material of preferred following component and mass percent is made: Tai-Ace S 150 34% with exempting to heat alkali-free liquid accelerator; Aluminium hydroxide 9%; Hydrofluoric acid 17%; Magnesium salts 21%; Hydramine 6.5%; Stablizer 2%; Water 10.5%; Described Tai-Ace S 150 is Aluminum Sulfate Solution, and in Tai-Ace S 150, the content of aluminum oxide is 16%, and magnesium salts is industrial magnesium silicofluoride, and hydramine is trolamine, and stablizer is welan gum (referring to embodiment 1).
Sprayed concrete of the present invention can also be that the raw material of preferred following component and mass percent is made: Tai-Ace S 150 46% with exempting to heat alkali-free liquid accelerator; Aluminium hydroxide 5%; Hydrofluoric acid 11%; Magnesium salts 12%; Hydramine 3%; Stablizer 3%; Water 20%; Described Tai-Ace S 150 is non-iron aluminium sulfate, and magnesium salts is Magnesium Silicate q-agent, and hydramine is diethanolamine, and stablizer is EDTA (referring to embodiment 3).
Described sprayed concrete comprises following processing step by the preparation method who exempts to heat alkali-free liquid accelerator: 1. take aluminium hydroxide by above-mentioned mass percent, be placed in reactor, in reactor, add 5%～10% of water inventory, aluminium hydroxide is stirred as pasty state, again hydrofluoric acid is slowly added, in adition process, keep whipped state, (due to) react for thermopositive reaction, in the time that reaching 50～55 DEG C, temperature add Tai-Ace S 150 to continue to stir in batches; 2. after hydrofluoric acid adds, add remaining Tai-Ace S 150 and supply remaining water, continue stirring Tai-Ace S 150 is fully dissolved, whole process maintains keeping warm mode, obtains reaction solution; 3. in reaction solution, add magnesium salts, be stirred to magnesium salts and dissolve, then add hydramine and stablizer, stir, make solution become even mixing liquid, obtain described alkali-free liquid accelerator.
In technique scheme, for add Tai-Ace S 150 in batches, step 1. in the optimum add-on of Tai-Ace S 150 be its total mass 30%～55%.The temperature that the whole process of step described in 2. maintains keeping warm mode is preferably 51～53 DEG C.
The using method of alkali-free liquid accelerator of the present invention can be according to the using method of conventional alkali-free liquid accelerator, join in sprayed concrete mixture at the nozzle place of spraying machine by alkali-free liquid accelerator of the present invention, its consumption is 3%～9% of cement consumption, preferably 4%～8%.
Liquid accelerator of the present invention can be used in sprayed concrete wet spraying process, belong to chlorine-free alkali-free liquid accelerator, in use procedure without heating, stationary phase is long, volume is 6% can meet the requirement of acceptable end product in JC477-2005 " sprayed concrete accelerating chemicals ", is a kind of well behaved alkali-free liquid setting accelerator.Compared with the prior art, the present invention has the following advantages:
(1) alkali content is lower than 1%, and chloride ion content, lower than 0.1%, belongs to chlorine-free alkali-free liquid accelerator, can reduce the possibility of alkali; High for concrete early strength, later strength is not lost (28d compressive strength rate is greater than 100%), improves concrete weather resistance.(2) in use procedure without heating, energy consumption is low.(3) exceed half a year stationary phase, liquid accelerator prepared by the present invention stores 8 months under field conditions (factors), and (year July in December, 2013 to 2014) is rear without precipitation crystallization, and result of use is unchanged.(4) cement adaptability is good.Liquid accelerator prepared by the present invention is more or less the same for engineered cementitious time of coagulation, the intensity of reference cement and various places.Be 4%～6% can meet the requirement of acceptable end product in JC477-2005 " sprayed concrete accelerating chemicals " for ordinary Portland cement volume; Can meet acceptable end product requirement for middle heat and low-heat portland cement volume 7%～9%.
It should be noted that, CN102219425A discloses a kind of alkali-free liquid accelerating agent and preparation method thereof,, as coordination agent, alkali content can reach 2.5% wherein to use water glass (addition is 0.5%～5%), is not proper alkali-free quick-coagulant.CN102249592A discloses high early strong liquid accelerator of a kind of alkali-free chlorine-free and preparation method thereof, wherein hydroxycarboxylic acid content is 3%-10%, and hydroxyl and carboxyl have delayed coagulation to cement concrete, can affect cement concrete early strength and then affect its result of use.CN102219426A discloses a kind of low-alkaline liquid accelerating agent and preparation method thereof.With in alum liquor and sodium aluminate solution and generate aluminum hydroxide sol, in original solution system, form polyaluminium sulfate with aluminum hydroxide sol polyreaction with Tai-Ace S 150 again, wherein sodium aluminate is slowly added drop-wise in alum liquor, institute's spended time is long, and need strong stirring in dropping process, higher to equipment requirements, be therefore not suitable for large-scale commercial production; Wherein need to add sodium aluminate, inevitably introduce alkalimetal ion, unfavorable to later strength.
In sum, liquid accelerator of the present invention and cement have stronger adaptability, and in use procedure, without heating, energy consumption is low, and performance is better.
Embodiment
Embodiment 1: liquid accelerator of the present invention (sprayed concrete is with exempting to heat alkali-free liquid accelerator) is to be made up of the raw material of component described in table 1 and quality proportioning (mass percent), table 1 is the proportioning raw materials (composition of raw materials) of embodiments of the invention 1～5, as shown in table 1, described percentage ratio is mass percent.
The proportioning raw materials of table 1 embodiment 1～5
The preparation method of liquid accelerator of the present invention (embodiment 1) comprises following processing step:
Take 90g aluminium hydroxide by above-mentioned mass percent, be placed in reactor, in reactor, add 10g water (account for water inventory 9.5%), aluminium hydroxide is stirred as pasty state, again 170g hydrofluoric acid is slowly added, in adition process, keep whipped state, because reaction is thermopositive reaction, in the time that temperature reaches 51 DEG C, add Tai-Ace S 150 to continue to stir in batches, now add Tai-Ace S 150 153g; 2. after hydrofluoric acid adds, add remaining 187g Tai-Ace S 150 and supply remaining 95g water, continue stirring Tai-Ace S 150 is fully dissolved, whole process maintains keeping warm mode, and temperature is 51 DEG C, obtains reaction solution; 3. in reaction solution, add 210g magnesium salts (magnesium silicofluoride), be stirred to magnesium salts and dissolve, then add 65g hydramine (trolamine) and 20g stablizer (welan gum), stir, make solution become even mixing liquid, obtain described alkali-free liquid accelerator.
In above-mentioned Tai-Ace S 150, the content of aluminum oxide can be 16%, in order to improve dissolution rate, need be crushed to below 1mm, and described like this Tai-Ace S 150 is for being crushed to (diameter is) 1mm or particle below 1mm.Above-mentioned aluminium hydroxide can be technical grade amorphous hydroted alumina.Above-mentioned hydrofluoric acid is technical grade hydrofluoric acid solution, requires HF content (massfraction) >=40%.
The preparation process identical from embodiment 1 (mass percent of each component is different) of embodiment 2,3,4,5.For example, the preparation method of liquid accelerator of the present invention (embodiment 3) comprises following processing step: take 500g aluminium hydroxide by above-mentioned mass percent, be placed in reactor, in reactor, add 100g water (account for water inventory 5%), aluminium hydroxide is stirred as pasty state, again 1100g hydrofluoric acid is slowly added, in adition process, keep whipped state, because reaction is thermopositive reaction, in the time that temperature reaches 53 DEG C (or 55 DEG C), add Tai-Ace S 150 to continue to stir in batches, now add Tai-Ace S 150 1610g; 2. after hydrofluoric acid adds, add remaining 2990g Tai-Ace S 150 and supply remaining 1900g water, continue stirring Tai-Ace S 150 is fully dissolved, whole process maintains keeping warm mode, and temperature is 53 DEG C (or 55 DEG C), obtains reaction solution; 3. in reaction solution, add 1200g magnesium salts (Magnesium Silicate q-agent), be stirred to magnesium salts and dissolve, then add 300g hydramine (diethanolamine) and 300g stablizer (EDTA), stir, make solution become even mixing liquid, obtain described alkali-free liquid accelerator.
In above-mentioned Tai-Ace S 150, the content of aluminum oxide can be 16%, in order to improve dissolution rate, need be crushed to below 1mm, and described like this Tai-Ace S 150 is for being crushed to (diameter is) 1mm or particle below 1mm.Above-mentioned aluminium hydroxide can be technical grade amorphous hydroted alumina.Above-mentioned hydrofluoric acid is technical grade hydrofluoric acid solution, requires HF content >=40%.
The embodiment providing is above further illustrating that the present invention is done; but can not be interpreted as it is limiting the scope of the invention; some nonessential improvement and adjustment that person skilled in art makes the present invention according to the content of the invention described above, still belong to protection scope of the present invention.
The application example of liquid accelerator of the present invention is as follows:
The present invention, through test and on probation, has all obtained good technique effect, and efficiency test data is as follows:
The test of cement paste time of coagulation and sand-cement slurry ultimate compression strength is carried out in requirement according to JC477-2005 " sprayed concrete accelerating chemicals ".Wherein, the volume of liquid accelerator, according to the percentage calculation of cement weight, mixes 6%, and liquid accelerating agent used is the product of embodiment 1～5 preparation.
Cement paste is measured time of coagulation:
Cement 400g
Water 160g
Sand-cement slurry compressive strength determination:
Cement 900g
Standard sand 1350g
Water 450g
Above water comprises the water in accelerating chemicals, and experiment hourly water consumption should deduct the content of water in accelerating chemicals.
Test-results is as shown in table 2:
The effect of table 2 liquid accelerator of the present invention
As can be seen from Table 2, liquid accelerator of the present invention is under 6% volume, all can meet the requirement of acceptable end product in JC477-2005 " sprayed concrete accelerating chemicals ", in application, also there is good performance at the scene, there is good cement adaptability, can effectively improve the performance of sprayed concrete each side.
Claims (10)
1. sprayed concrete, with exempting to heat an alkali-free liquid accelerator, is characterized in that it is to be made up of the raw material of following component and mass percent:
Tai-Ace S 150 30%～55%; Aluminium hydroxide 3%～10%; Hydrofluoric acid 10%～18%; Magnesium salts 8%～25%; Hydramine 1%～8%; Stablizer 0.5%～4%; Water 10%～33%, the mass percent sum of above-mentioned each component is 100%;
Described magnesium salts is the one in industrial magnesium silicofluoride, magnesium sulfate, Magnesium Silicate q-agent; Described stablizer is the one in welan gum, non-ionic polyacrylamide, EDTA.
2. sprayed concrete according to claim 1 is with exempting to heat alkali-free liquid accelerator, the content that it is characterized in that aluminum oxide in above-mentioned Tai-Ace S 150 is 16%～17%, adopt industrial ferrous contained or non-iron aluminium sulfate, described Tai-Ace S 150 is that to be crushed to diameter be 1mm or the particle below 1mm.
3. sprayed concrete according to claim 1, with exempting to heat alkali-free liquid accelerator, is characterized in that above-mentioned aluminium hydroxide is technical grade amorphous hydroted alumina.
4. sprayed concrete according to claim 1, with exempting to heat alkali-free liquid accelerator, is characterized in that above-mentioned hydrofluoric acid is technical grade hydrofluoric acid solution, requires HF content >=40%.
5. sprayed concrete according to claim 1, with exempting to heat alkali-free liquid accelerator, is characterized in that above-mentioned hydramine is the one in diethanolamine, trolamine, tri-isopropanolamine.
6. sprayed concrete according to claim 1, with exempting to heat alkali-free liquid accelerator, is characterized in that it is to be made up of the raw material of following component and mass percent:
Tai-Ace S 150 34%; Aluminium hydroxide 9%; Hydrofluoric acid 17%; Magnesium salts 21%; Hydramine 6.5%; Stablizer 2%; Water 10.5%; Described Tai-Ace S 150 is Aluminum Sulfate Solution, and in Tai-Ace S 150, the content of aluminum oxide is 16%, and magnesium salts is industrial magnesium silicofluoride, and hydramine is trolamine, and stablizer is welan gum.
7. sprayed concrete according to claim 1, with exempting to heat alkali-free liquid accelerator, is characterized in that it is to be made up of the raw material of following component and mass percent:
Tai-Ace S 150 46%; Aluminium hydroxide 5%; Hydrofluoric acid 11%; Magnesium salts 12%; Hydramine 3%; Stablizer 3%; Water 20%; Described Tai-Ace S 150 is non-iron aluminium sulfate, and magnesium salts is Magnesium Silicate q-agent, and hydramine is diethanolamine, and stablizer is EDTA.
8. a preparation method who exempts to heat alkali-free liquid accelerator for sprayed concrete claimed in claim 1, is characterized in that it comprises following processing step:
1. take aluminium hydroxide by above-mentioned mass percent, be placed in reactor, in reactor, add 5%～10% of water inventory, aluminium hydroxide is stirred as pasty state, again hydrofluoric acid is slowly added, in adition process, keep whipped state, react for thermopositive reaction, in the time that temperature reaches 50～55 DEG C, add Tai-Ace S 150 to continue to stir in batches; 2. after hydrofluoric acid adds, add remaining Tai-Ace S 150 and supply remaining water, continue stirring Tai-Ace S 150 is fully dissolved, whole process maintains keeping warm mode, obtains reaction solution; 3. in reaction solution, add magnesium salts, be stirred to magnesium salts and dissolve, then add hydramine and stablizer, stir, make solution become even mixing liquid, obtain described alkali-free liquid accelerator.
9. the preparation method who exempts to heat alkali-free liquid accelerator for sprayed concrete according to claim 8, is characterized in that for add Tai-Ace S 150 in batches, step 1. in the add-on of Tai-Ace S 150 be its total mass 30%～55%.
10. the preparation method who exempts to heat alkali-free liquid accelerator for sprayed concrete according to claim 8, is characterized in that the temperature that the whole process described in step 2. maintains keeping warm mode is 51～53 DEG C.
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