CN104193211B - Sprayed concrete is with exempting from heating alkali-free liquid accelerator and its preparation method - Google Patents
Sprayed concrete is with exempting from heating alkali-free liquid accelerator and its preparation method Download PDFInfo
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- CN104193211B CN104193211B CN201410405775.7A CN201410405775A CN104193211B CN 104193211 B CN104193211 B CN 104193211B CN 201410405775 A CN201410405775 A CN 201410405775A CN 104193211 B CN104193211 B CN 104193211B
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- 239000007788 liquid Substances 0.000 title claims abstract description 71
- 239000011378 shotcrete Substances 0.000 title claims abstract description 36
- 238000010438 heat treatment Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 58
- 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 57
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 159000000003 magnesium salts Chemical class 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 235000011837 pasties Nutrition 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims abstract description 6
- ZZVUWRFHKOJYTH-UHFFFAOYSA-N diphenhydramine Chemical compound C=1C=CC=CC=1C(OCCN(C)C)C1=CC=CC=C1 ZZVUWRFHKOJYTH-UHFFFAOYSA-N 0.000 claims abstract 8
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical group OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical group OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 4
- 229920002310 Welan gum Polymers 0.000 claims description 4
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 4
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical group OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical group [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000391 magnesium silicate Substances 0.000 claims description 4
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 4
- 235000019792 magnesium silicate Nutrition 0.000 claims description 4
- 229960004418 trolamine Drugs 0.000 claims description 4
- 235000011128 aluminium sulphate Nutrition 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 21
- 239000004568 cement Substances 0.000 abstract description 18
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000003513 alkali Substances 0.000 description 17
- 239000004567 concrete Substances 0.000 description 11
- 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
- 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
- 230000000694 effects Effects 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
- 238000010276 construction Methods 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
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 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
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 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
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 159000000013 aluminium salts Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 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
- 239000013078 crystal Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 229920002401 polyacrylamide Polymers 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
- 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
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A kind of sprayed concrete is with exempting from heating alkali-free liquid accelerator and its preparation method, and described liquid accelerator is 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 salt 8%～25%; Hydramine 1%～8%; Stablizer 0.5%～4%; Water 10%～33%. Preparation method, it is characterised in that it comprises following processing step: get aluminium hydroxide, is placed in reactor, add water in a kettle., aluminium hydroxide is stirred as pasty state, then hydrofluoric acid is slowly added, when temperature reaches 50～55 DEG C, add Tai-Ace S 150 in batches continue to stir; After hydrofluoric acid adds, add remaining Tai-Ace S 150 and supply remaining water, obtain reaction solution; Reaction solution adds magnesium salt, then adds hydramine and stablizer, make solution become Homogeneous phase mixing liquid. The accelerating chemicals of the present invention and cement have stronger adaptability, it may also be useful to without the need to heating in process, energy consumption is low, functional.
Description
Technical field
The present invention relates to a kind of concrete admixture, it is specifically related to a kind of wet spraying process the reinforcement of concrete alkali-free liquid accelerator, belong to building material technical field, particularly a kind of sprayed concrete is with exempting from heating alkali-free liquid accelerator, the alkali-free liquid accelerator in the wet shotcrete in especially a kind of tunnel and tunnel. The present invention also relates to the preparation method of described liquid accelerator.
Background technology
Accelerating chemicals is the admixture that cement rapid coagulation is hardened, and is mainly used in construction of shotcrete. In the engineering such as tunnel, underground mine is constructed; 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 accelerating sprayed concrete, it is to increase its early strength, like this for rapid construction is laid a good foundation.
The development of wet-spray technique in recent years, extends the use range of sprayed concrete. Liquid accelerator for wet shotcrete includes alkali accelerating chemicals and alkali-free quick-coagulant, should be used for seeing to there is following problem from it: alkali content height, 28d (28 days) strength ratio reduce, stationary phase is short, energy consumption is high production process.
Generally speaking, alkali content is called alkali-free quick-coagulant lower than the accelerating chemicals of 1%, 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 is more than 6%; And some alkali-free quick-coagulant is owing to introducing sodium/potassium ion in formula, actual alkali content is often higher than 1%; The accelerating chemicals of high alkali content mixes and can affect concrete later strength in concrete 28d strength ratio is reduced, and so just directly affects the weather resistance of concrete structure, is unfavorable for the control of construction quality.
Use the accelerating chemicals of aluminium salt owing to being hydrolyzed and solubility, the sedimentation existed in the shelf lives in various degree, devitrification problem so that effective concentration reduces, and have impact on the result of use of accelerating chemicals.In existing explained hereafter, no matter have in alkali or alkali-free quick-coagulant production process in various degree need heating, requirement and energy consumption to equipment is 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 its preparation method, described alkali-free liquid accelerating agent, adopt Tai-Ace S 150 as main rapid hardening composition, with the form of aluminum fluoride, aluminium is added alum liquor be polymerized, reach and farthest introduce 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 be: Tai-Ace S 150: 30～55%, aluminium hydroxide: 5～15%, hydrofluoric acid: 10～30%, water glass: 0.5～5%, stablizer: 0～0.2%, rest part is water. CN102249592A discloses a kind of alkali-free chlorine-free height early strong liquid accelerator and its preparation method, alkali-free chlorine-free height strong liquid accelerator morning is by Tai-Ace S 150, alkaline earth salt, aluminium hydroxide, hydroxycarboxylic acid, organic amine compound, stablizer synthesis, it is characterised in that and have employed 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 alkali liquid state accelerating chemicals and its preparation method. Described low alkali liquid state accelerating chemicals, 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 Solutions Solution have higher aluminium composition and liquid stability; Described low alkali liquid state accelerating chemicals 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%, sodium aluminate 6～12%, stablizer 0～0.2%, and rest part is water.
Above these technology for how to make liquid accelerator and cement have in stronger adaptability, use procedure without the need to heating and functional, do not provide concrete guidance program.
Summary of the invention
Technical problem to be solved by this invention is, it is provided that a kind of sprayed concrete is with exempting from heating alkali-free liquid accelerator, and this liquid accelerator and cement have stronger adaptability, it may also be useful to without the need to heating in process, energy consumption is low, functional.
For this reason, the present invention also to be provided the described sprayed concrete preparation method exempting to heat alkali-free liquid accelerator.
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 from heating alkali-free liquid accelerator, and its technical scheme is that it is 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 salt 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 salt is the one in industry 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%, industrial ferrous contained or non-iron aluminium sulfate can be adopted, in order to improve dissolution rate, need to being crushed to below 1mm, described like this Tai-Ace S 150 is for being crushed to the particle of (diameter is) 1mm or below 1mm.Above-mentioned aluminium hydroxide can be technical grade amorphous hydroted alumina. Above-mentioned hydrofluoric acid can be technical grade hydrofluoric acid solution, it is desired to HF content >=40%. Above-mentioned hydramine is the one in diethanolamine, trolamine, tri-isopropanolamine.
The sprayed concrete of the present invention heats, with exempting from, the raw material that alkali-free liquid accelerator can be preferred following component and mass percent and makes: Tai-Ace S 150 34%; Aluminium hydroxide 9%; Hydrofluoric acid 17%; Magnesium salt 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 salt is industry magnesium silicofluoride, and hydramine is trolamine, and stablizer is welan gum (see embodiment 1).
The sprayed concrete of the present invention heats, with exempting from, the raw material that alkali-free liquid accelerator can also be preferred following component and mass percent and makes: Tai-Ace S 150 46%; Aluminium hydroxide 5%; Hydrofluoric acid 11%; Magnesium salt 12%; Hydramine 3%; Stablizer 3%; Water 20%; Described Tai-Ace S 150 is non-iron aluminium sulfate, and magnesium salt is Magnesium Silicate q-agent, and hydramine is diethanolamine, and stablizer is EDTA (see embodiment 3).
The described sprayed concrete preparation method exempting to heat alkali-free liquid accelerator comprises following processing step: 1. take aluminium hydroxide by above-mentioned mass percent, it is placed in reactor, add the 5%～10% of water inventory in a kettle., aluminium hydroxide is stirred for pasty state, again hydrofluoric acid is slowly added, adition process keeps whipped state, (due to) react for thermopositive reaction, when temperature reaches 50～55 DEG C, add Tai-Ace S 150 in batches continue to stir; 2. after hydrofluoric acid adds, adding remaining Tai-Ace S 150 and supply remaining water, continue stirring and Tai-Ace S 150 is fully dissolved, whole process maintains keeping warm mode, obtains reaction solution; 3. in reaction solution, add magnesium salt, it is stirred to magnesium salt and dissolves, then add hydramine and stablizer, stir, make solution become Homogeneous phase mixing liquid, obtain described alkali-free liquid accelerator.
In technique scheme, for adding Tai-Ace S 150 in batches, step 1. in the optimum add-on of Tai-Ace S 150 be the 30%～55% of its total mass. Step 2. described in whole process maintain keeping warm mode temperature be preferably 51～53 DEG C.
The using method of the alkali-free liquid accelerator of the present invention can the using method of conveniently alkali-free liquid accelerator, join in sprayed concrete mixture by the alkali-free liquid accelerator of the present invention at the nozzle place of spraying machine, its consumption is the 3%～9% of cement consumption, it is preferable that 4%～8%.
The liquid accelerator of the present invention can be used in sprayed concrete wet spraying process, belong to chlorine-free alkali-free liquid accelerator, without the need to heating in use procedure, stationary phase is long, volume is 6% requirement that can meet acceptable end product in JC477-2005 " sprayed concrete accelerating chemicals ", is a kind of alkali-free liquid setting accelerator of good performance. 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, it is possible to reduce the possibility of alkali; For early strength height in concrete, later strength is not lost (28d compressive strength rate is greater than 100%), it is to increase concrete weather resistance. (2) without the need to heating in use procedure, energy consumption is low. (3) exceed half a year stationary phase, liquid accelerator prepared by the present invention under natural condition, store 8 months (in December, 2013 is in July, 2014) afterwards without deposit to get crystal phenomenon, it may also be useful to effect 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. It is 4%～6% requirement that can meet acceptable end product in JC477-2005 " sprayed concrete accelerating chemicals " for ordinary Portland cement volume; Acceptable end product requirement can be met 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 its preparation method,, as coordination agent, alkali content can reach 2.5% wherein to use water glass (addition is 0.5%～5%), is not the alkali-free quick-coagulant in strict meaning. CN102249592A discloses a kind of alkali-free chlorine-free height early strong liquid accelerator and its preparation method, wherein hydroxycarboxylic acid content is 3%-10%, and cement concrete is had delayed coagulation by hydroxyl and carboxyl, cement concrete early strength can be affected and then affect its result of use. CN102219426A discloses a kind of low alkali liquid state accelerating chemicals and its preparation method. With in alum liquor and sodium aluminate solution and generate aluminum hydroxide sol, in original solution system, polyaluminium sulfate is formed with aluminum hydroxide sol polyreaction again with Tai-Ace S 150, wherein sodium aluminate is slowly added drop-wise in alum liquor, institute's spended time is long, and drip to add and process needs strong stirring, equipment requirements is higher, be therefore not suitable for large-scale commercial production; Wherein need to add sodium aluminate, inevitable introducing alkalimetal ion, later strength is unfavorable.
In sum, the liquid accelerator of the present invention and cement have stronger adaptability, it may also be useful to without the need to heating in process, energy consumption is low, and performance is better.
Embodiment
Embodiment 1: the liquid accelerator (sprayed concrete is with exempting from heating alkali-free liquid accelerator) of the present invention is 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 the liquid accelerator (embodiment 1) of the present invention comprises following processing step:
90g aluminium hydroxide is taken by above-mentioned mass percent, it is placed in reactor, add 10g water (accounting for the 9.5% of water inventory) in a kettle., aluminium hydroxide is stirred for pasty state, again 170g hydrofluoric acid is slowly added, adition process keeps whipped state, owing to reaction is thermopositive reaction, when temperature reaches 51 DEG C, add Tai-Ace S 150 continue to stir in batches, now add Tai-Ace S 150 153g; 2. after hydrofluoric acid adds, adding remaining 187g Tai-Ace S 150 and supply remaining 95g water, continue stirring and 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 salt (magnesium silicofluoride), it is stirred to magnesium salt to dissolve, then adds 65g hydramine (trolamine) and 20g stablizer (welan gum), stir, make solution become Homogeneous phase 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 to be crushed to below 1mm, and described like this Tai-Ace S 150 is for being crushed to the particle of (diameter is) 1mm or below 1mm. Above-mentioned aluminium hydroxide can be technical grade amorphous hydroted alumina. Above-mentioned hydrofluoric acid is technical grade hydrofluoric acid solution, it is desired to HF content (massfraction) >=40%.
The preparation process of embodiment 2,3,4,5 identical from embodiment 1 (mass percent of each component is different). Such as, the preparation method of the liquid accelerator (embodiment 3) of the present invention comprises following processing step: take 500g aluminium hydroxide by above-mentioned mass percent, it is placed in reactor, add 100g water (accounting for the 5% of water inventory) in a kettle., aluminium hydroxide is stirred for pasty state, again 1100g hydrofluoric acid is slowly added, adition process keeps whipped state, owing to reaction is thermopositive reaction, when temperature reaches 53 DEG C (or 55 DEG C), add Tai-Ace S 150 continue to stir in batches, now add Tai-Ace S 150 1610g; 2. after hydrofluoric acid adds, adding remaining 2990g Tai-Ace S 150 and supply remaining 1900g water, continue stirring and 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 salt (Magnesium Silicate q-agent), it is stirred to magnesium salt to dissolve, then adds 300g hydramine (diethanolamine) and 300g stablizer (EDTA), stir, make solution become Homogeneous phase 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 to be crushed to below 1mm, and described like this Tai-Ace S 150 is for being crushed to the particle of (diameter is) 1mm or below 1mm. Above-mentioned aluminium hydroxide can be technical grade amorphous hydroted alumina. Above-mentioned hydrofluoric acid is technical grade hydrofluoric acid solution, it is desired to HF content >=40%.
The embodiment provided above is further explanation the present invention done; but can not be interpreted as it is limiting the scope of the invention; the improvement of some non-intrinsically safes that the present invention is made by person skilled in art according to the content of above-mentioned the present invention and adjustment, still belong to protection scope of the present invention.
The application example of the liquid accelerator of the present invention is as follows:
The present invention is through test and tries out, and all achieves good technique effect, and efficiency test data is as follows:
Cement paste time of coagulation and the test of sand-cement slurry ultimate compression strength is carried out according to the requirement of 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 product prepared by embodiment 1～5.
Cement paste measures 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 subtract the content of water in accelerating chemicals.
Test-results is as shown in table 2:
The effect of the liquid accelerator of table 2 the present invention
As can be seen from Table 2, the liquid accelerator of the present invention is under the volume of 6%, all can meet the requirement of acceptable end product in JC477-2005 " sprayed concrete accelerating chemicals ", rig-site utilization also has good performance, there is good cement adaptability, can effectively improve the performance of sprayed concrete each side.
Claims (10)
1. a sprayed concrete is with exempting from heating alkali-free liquid accelerator, it is characterised in that it is made up of the raw material of following component and mass percent:
Tai-Ace S 150 34%; Aluminium hydroxide 9%; Hydrofluoric acid 17%; Magnesium salt 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 salt is industry magnesium silicofluoride, and hydramine is trolamine, and stablizer is welan gum;
The described sprayed concrete preparation method exempting to heat alkali-free liquid accelerator comprises following processing step:
1. aluminium hydroxide is taken by above-mentioned mass percent, it is placed in reactor, add the 9.5% of water inventory in a kettle., aluminium hydroxide is stirred for pasty state, again hydrofluoric acid is slowly added, adition process keeps whipped state, reacts for thermopositive reaction, when temperature reaches 51 DEG C, add Tai-Ace S 150 in batches continue to stir; 2. after hydrofluoric acid adds, adding remaining Tai-Ace S 150 and supply remaining water, continue stirring and Tai-Ace S 150 is fully dissolved, whole process maintains keeping warm mode, obtains reaction solution; 3. in reaction solution, add magnesium salt, it is stirred to magnesium salt and dissolves, then add hydramine and stablizer, stir, make solution become Homogeneous phase mixing liquid, obtain described alkali-free liquid accelerator.
2. sprayed concrete according to claim 1 is with exempting from heating alkali-free liquid accelerator, it is characterised in that described Tai-Ace S 150 is be crushed to the particle that diameter is 1mm or below 1mm.
3. sprayed concrete according to claim 1 is with exempting from heating alkali-free liquid accelerator, it is characterised in that above-mentioned aluminium hydroxide is technical grade amorphous hydroted alumina.
4. sprayed concrete according to claim 1 is with exempting from heating alkali-free liquid accelerator, it is characterised in that above-mentioned hydrofluoric acid is technical grade hydrofluoric acid solution, it is desired to HF content >=40%.
5. sprayed concrete according to claim 1 is with exempting from heating alkali-free liquid accelerator, it is characterised in that for adding Tai-Ace S 150 in batches, step 1. in the add-on of Tai-Ace S 150 be the 45% of its total mass.
6. sprayed concrete according to claim 1 with exempt from heating alkali-free liquid accelerator, it is characterised in that step 2. described in whole process maintain keeping warm mode temperature be 51 DEG C.
7. a sprayed concrete is with exempting from heating alkali-free liquid accelerator, it is characterised in that it is made up of the raw material of following component and mass percent:
Tai-Ace S 150 46%; Aluminium hydroxide 5%; Hydrofluoric acid 11%; Magnesium salt 12%; Hydramine 3%; Stablizer 3%; Water 20%; Described Tai-Ace S 150 is non-iron aluminium sulfate, and magnesium salt is Magnesium Silicate q-agent, and hydramine is diethanolamine, and stablizer is EDTA;
The described sprayed concrete preparation method exempting to heat alkali-free liquid accelerator comprises following processing step:
1. aluminium hydroxide is taken by above-mentioned mass percent, it is placed in reactor, add the 5% of water inventory in a kettle., aluminium hydroxide is stirred for pasty state, again hydrofluoric acid is slowly added, adition process keeps whipped state, reacts for thermopositive reaction, when temperature reaches 53 DEG C, add Tai-Ace S 150 in batches continue to stir; 2. after hydrofluoric acid adds, adding remaining Tai-Ace S 150 and supply remaining water, continue stirring and Tai-Ace S 150 is fully dissolved, whole process maintains keeping warm mode, obtains reaction solution; 3. in reaction solution, add magnesium salt, it is stirred to magnesium salt and dissolves, then add hydramine and stablizer, stir, make solution become Homogeneous phase mixing liquid, obtain described alkali-free liquid accelerator.
8. sprayed concrete according to claim 7 is with exempting from heating alkali-free liquid accelerator, it is characterized in that described Tai-Ace S 150 is be crushed to the particle that diameter is 1mm or below 1mm, above-mentioned aluminium hydroxide is technical grade amorphous hydroted alumina, above-mentioned hydrofluoric acid is technical grade hydrofluoric acid solution, it is desired to HF content >=40%.
9. sprayed concrete according to claim 7 is with exempting from heating alkali-free liquid accelerator, it is characterised in that for adding Tai-Ace S 150 in batches, step 1. in the add-on of Tai-Ace S 150 be the 35% of its total mass.
10. sprayed concrete according to claim 7 with exempt from heating alkali-free liquid accelerator, it is characterised in that step 2. described in whole process maintain keeping warm mode temperature be 53 DEG C.
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