CN114763298A - Alkali-free accelerator - Google Patents
Alkali-free accelerator Download PDFInfo
- Publication number
- CN114763298A CN114763298A CN202110043675.4A CN202110043675A CN114763298A CN 114763298 A CN114763298 A CN 114763298A CN 202110043675 A CN202110043675 A CN 202110043675A CN 114763298 A CN114763298 A CN 114763298A
- Authority
- CN
- China
- Prior art keywords
- alkali
- parts
- free accelerator
- aluminum sulfate
- sulfate solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 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 25
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 17
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 17
- 239000003381 stabilizer Substances 0.000 claims abstract description 17
- 239000011378 shotcrete Substances 0.000 claims description 25
- 239000000725 suspension Substances 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 11
- 229940024545 aluminum hydroxide Drugs 0.000 claims description 11
- 229940024546 aluminum hydroxide gel Drugs 0.000 claims description 10
- SMYKVLBUSSNXMV-UHFFFAOYSA-K aluminum;trihydroxide;hydrate Chemical compound O.[OH-].[OH-].[OH-].[Al+3] SMYKVLBUSSNXMV-UHFFFAOYSA-K 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 7
- 229920002310 Welan gum Polymers 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 239000004568 cement Substances 0.000 abstract description 13
- 230000015271 coagulation Effects 0.000 abstract description 4
- 238000005345 coagulation Methods 0.000 abstract description 4
- 239000004570 mortar (masonry) Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 22
- 230000000694 effects Effects 0.000 description 13
- 239000003795 chemical substances by application Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 7
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000010998 test method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- IQUCNXSZNHPPML-UHFFFAOYSA-N 2-chloro-n-[(4-chlorophenyl)-phenylmethyl]acetamide Chemical compound C=1C=C(Cl)C=CC=1C(NC(=O)CCl)C1=CC=CC=C1 IQUCNXSZNHPPML-UHFFFAOYSA-N 0.000 description 3
- RFVNOJDQRGSOEL-UHFFFAOYSA-N 2-hydroxyethyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCO RFVNOJDQRGSOEL-UHFFFAOYSA-N 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 229940075507 glyceryl monostearate Drugs 0.000 description 3
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000001164 aluminium sulphate Substances 0.000 description 1
- 235000011128 aluminium sulphate Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002285 corn oil Substances 0.000 description 1
- 235000005687 corn oil Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an alkali-free accelerator which comprises the following components in parts by mass: 40-50 parts of ammonia water, 40-50 parts of aluminum sulfate solution and 1-5 parts of stabilizer, the invention effectively promotes the coagulation of cement paste, improves the compressive strength of the cement paste, the initial coagulation time is less than 5min, the final coagulation time is less than 12min, and the highest compressive strength of 1d mortar can reach 11 MPa.
Description
Technical Field
The invention relates to an accelerator, in particular to an alkali-free accelerator.
Background
The sprayed concrete is widely used in railway traffic engineering, underground tunnel excavation engineering, water conservancy leakage stoppage emergency engineering, mining engineering and the like. The accelerator can effectively reduce the setting time of sprayed concrete, which makes the accelerator widely applied to the field of sprayed concrete in recent years. The liquid accelerator is an additive for quickly setting and hardening cement concrete, has the advantages of short setting time, low rebound rate, small dust amount and the like, can greatly improve the construction quality of sprayed concrete, and is widely used. The liquid accelerator comprises an alkali-rich accelerator and an alkali-free accelerator, however, in practical engineering application, when the sprayed concrete and the alkali-rich liquid accelerator are mixed for use, alkali aggregate reaction easily occurs, the durability of the concrete is influenced, and the alkali-free accelerator becomes the first choice for the sprayed concrete accelerator due to high efficiency, safety and stable performance.
However, the alkali-free setting accelerator in the prior art still has long setting time, can not effectively improve the compressive strength of the shotcrete, and greatly limits the development of the alkali-free setting accelerator.
Disclosure of Invention
In order to make up the defects of the prior art, the invention discloses an alkali-free accelerator. The invention is realized by adopting the following technical scheme:
the alkali-free accelerator comprises the following components in parts by mass: 40-50 parts of ammonia water, 40-50 parts of aluminum sulfate solution and 1-5 parts of stabilizer.
Further, the alkali-free accelerator comprises the following components in parts by mass: 45-50 parts of ammonia water, 45-50 parts of aluminum sulfate solution and 3-5 parts of stabilizer.
Furthermore, the concentration of the ammonia water is 0.12-0.6 mol/L, and the concentration of the aluminum sulfate solution is 0.02-0.1 mol/L.
Further, the stabilizer comprises a welan gum.
Further, the preparation method of the alkali-free accelerator comprises the following steps:
1) preparing an aluminum hydroxide gel suspension;
2) stirring the aluminum hydroxide suspension and the stabilizer at 180-200 rpm for 1-2 h.
Further, the preparation method of the aluminum hydroxide gel suspension comprises the following steps: and stirring the ammonia water and the aluminum sulfate solution for 5-7 hours at 30-70 rpm.
Further, the preparation method of the aluminum sulfate solution comprises the following steps: mixing industrial aluminum sulfate and pseudo-boehmite according to the mass ratio of 2-7: 1, grinding, sieving by a sieve of 80-90 meshes, and mixing with water to obtain an aluminum sulfate solution.
Further, the alkali-free accelerator is applied to sprayed concrete, and the using amount of the alkali-free accelerator is 4-6% of the mass of a gelled material of the sprayed concrete.
Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:
(1) the technical scheme provided by the invention adopts a chemical synthesis method to prepare amorphous aluminum hydroxide, and the amorphous aluminum hydroxide is used as a main active component of the alkali-free setting accelerator, so that high-activity aluminum phase elements are quickly released, the aluminum phase distribution is adjusted, the cement paste coagulation is effectively promoted, the compressive strength of the cement paste is improved, the initial setting time is less than 5min, the final setting time is less than 12min, and the highest compressive strength of 1d mortar can reach 11 MPa.
(2) The technical scheme provided by the invention adopts the thermal gel as the stabilizer, so that the amorphous aluminum hydroxide suspension can keep stable performance under long-term storage, the release state of high-activity aluminum phase elements can be continuously kept, and the quick-setting effect is efficient and stable.
(3) The technical scheme provided by the invention takes the high-activity amorphous aluminum hydroxide as the main raw material component of the alkali-free accelerator, so that the damage of the alkali-aggregate reaction to the durability of concrete can be effectively avoided, the accelerating effect is high-efficiency and stable, the raw material process is simple, the technical idea of applying the alkali-free accelerator to the project in the field of sprayed concrete is developed, and the alkali-free accelerator has great economic and social benefits.
Detailed Description
The following further description of the present invention is provided for a better understanding of the present invention.
The invention provides an alkali-free accelerator, which comprises: 40-50 parts of ammonia water, 40-50 parts of aluminum sulfate solution and 1-5 parts of stabilizer. Wherein the stabilizer is preferably liquid rubber, and the preparation method of the liquid rubber comprises the following steps: mixing a warm wheel rubber aqueous solution and a solvent uniformly to prepare a mixed solution, wherein the solvent is selected from corn oil or castor oil, adding 0.1-0.3% of ethylene glycol monostearate by mass into the solvent, heating, stirring to be completely dissolved to prepare an ethylene glycol monostearate solution, adding 0.1-0.25% of distilled glyceryl monostearate by mass into water, heating, stirring to be completely dissolved to prepare a distilled glyceryl monostearate solution, adding 0.2-0.4% of triglycerol monostearate by mass into the solvent, heating, stirring to be completely dissolved to prepare a triglycerol monostearate solution, heating the mixed solution to 55-65 ℃, sequentially adding the prepared ethylene glycol monostearate solution, the distilled glyceryl monostearate solution and the triglycerol monostearate solution, uniformly mixing, cooling to room temperature, and preparing the liquid rubber for the warm wheel. The liquid rubber for the warm wheel provided by the invention has the advantages of good stability, convenience for industrial transportation and use, convenience for application, no dust flying in the use process, capability of ensuring the use safety, contribution to environmental protection and reduction of loss. The aluminum sulfate solution is pretreated before use, and the pretreatment method comprises the following steps: mixing industrial aluminum sulfate and pseudo-boehmite according to the mass ratio of 2-7: 1, grinding, sieving by a sieve of 80-90 meshes, and mixing with water to obtain an aluminum sulfate solution.
Example 1
Slowly adding 40 parts by weight of 0.12mol/L ammonia water into 40 parts by weight of 0.02mol/L aluminum sulfate solution, after dropwise adding, continuously mixing for 5 hours at the speed of 30rpm by using a low-speed stirrer to prepare amorphous aluminum hydroxide gel suspension; and stirring 80 parts by weight of the aluminum hydroxide suspension and 1 part by weight of a stabilizer, preferably a welan gum, for 1 hour at the rotating speed of 180rpm by using a high-speed stirrer to prepare the alkali-free accelerator. The use amount of the alkali-free accelerator for sprayed concrete provided by the embodiment is 4% of the mass of the cementing material.
The effect of the quick-setting agent in the embodiment is characterized by cement setting time and mechanical properties, the test method of the material setting time and the compressive strength refers to the national standard GB/T35159-2017 accelerating agent for sprayed concrete, and the test results are shown in Table 2.
Example 2
Slowly adding 42.5 parts by weight of 0.24mol/L ammonia water into 42.5 parts by weight of 0.04mol/L aluminum sulfate solution, and after dropwise adding, continuously mixing for 5.5 hours at the speed of 40rpm by using a low-speed stirrer to prepare an amorphous aluminum hydroxide gel suspension; 85 parts by weight of the aluminum hydroxide suspension and 2 parts by weight of a stabilizer, preferably a welan gum, were stirred with a high-speed stirrer at 185rpm for 1.25 hours to obtain an alkali-free setting accelerator. The use amount of the alkali-free accelerator for sprayed concrete provided by the embodiment is 4.5% of the mass of the cementing material.
The effect of the quick-setting agent in the embodiment is characterized by cement setting time and mechanical properties, the test method of the material setting time and the compressive strength refers to the national standard GB/T35159-2017 accelerating agent for sprayed concrete, and the test results are shown in Table 2.
Example 3
Slowly adding 45 parts by weight of 0.3mol/L ammonia water into 45 parts by weight of 0.05mol/L aluminum sulfate solution, after dropwise adding, continuously mixing for 6 hours at the speed of 50rpm by using a low-speed stirrer to prepare amorphous aluminum hydroxide gel suspension; and stirring 90 parts by weight of the aluminum hydroxide suspension and 3 parts by weight of a stabilizer, preferably a welan gum, for 1.5 hours at the rotation speed of 190rpm by using a high-speed stirrer to prepare the alkali-free accelerator. The use amount of the alkali-free accelerator for sprayed concrete provided by the embodiment is 5% of the mass of the cementing material.
The effect of the quick-setting agent in the embodiment is characterized by cement setting time and mechanical properties, the test method for the material setting time and the compressive strength refers to the national standard GB/T35159 and 2017 accelerator for sprayed concrete, and the test results are shown in Table 2.
Example 4
Slowly adding 47.5 parts by weight of 0.48mol/L ammonia water into 47.5 parts by weight of 0.06mol/L aluminum sulfate solution, and after dropwise adding, continuously mixing for 6.5 hours at the speed of 60rpm by using a low-speed stirrer to prepare amorphous aluminum hydroxide gel suspension; 95 parts by weight of the aluminum hydroxide suspension and 4 parts by weight of a stabilizer, preferably a welan gum, were stirred with a high-speed stirrer at 195rpm for 1.75 hours to obtain an alkali-free setting accelerator. The use amount of the alkali-free accelerator for sprayed concrete provided by the embodiment is 5.5% of the mass of the cementing material.
The effect of the quick-setting agent in the embodiment is characterized by cement setting time and mechanical properties, the test method of the material setting time and the compressive strength refers to the national standard GB/T35159-2017 accelerating agent for sprayed concrete, and the test results are shown in Table 2.
Example 5
Slowly adding 50 parts by weight of 0.6mol/L ammonia water into 50 parts by weight of 0.1mol/L aluminum sulfate solution, after dropwise adding, continuously mixing for 7 hours at the speed of 70rpm by using a low-speed mixer to prepare amorphous aluminum hydroxide gel suspension; 100 parts by weight of aluminum hydroxide suspension and 5 parts by weight of stabilizer, preferably warm wheel rubber, are stirred for 2 hours at the rotating speed of 200rpm by a high-speed stirrer to prepare the alkali-free accelerator. The use amount of the alkali-free accelerator for sprayed concrete provided by the embodiment is 6% of the mass of the cementing material.
The effect of the quick-setting agent in the embodiment is characterized by cement setting time and mechanical properties, the test method of the material setting time and the compressive strength refers to the national standard GB/T35159-2017 accelerating agent for sprayed concrete, and the test results are shown in Table 2.
Comparative example 1
The alkali-free accelerator is not added in the preparation process of the shotcrete in the comparative example, the rest steps and parameters are the same as those of the example, the effect of the accelerator in the comparative example is represented by cement setting time and mechanical properties, the material setting time and the compression strength are tested by referring to the national standard GB/T35159-2017 accelerator for shotcrete, and the test results are shown in Table 2.
TABLE 1 raw materials and Experimental parameters for examples 1-5
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Amorphous aluminum hydroxide gel (parts by weight) | 80 | 85 | 90 | 95 | 100 |
| Warm wheel rubber (parts by weight) | 1 | 2 | 3 | 4 | 5 |
| Rotating speed of high-speed mixer (rpm) | 180 | 185 | 190 | 195 | 200 |
| Stirring time of high-speed stirrer (h) | 1 | 1.25 | 1.5 | 1.75 | 2 |
| Ammonia solution (parts by weight) | 40 | 42.5 | 45 | 47.5 | 50 |
| Concentration of Ammonia solution (mol/L) | 0.12 | 0.24 | 0.3 | 0.48 | 0.6 |
| Aluminium sulphate solution (parts by weight) | 40 | 42.5 | 45 | 47.5 | 50 |
| Concentration of aluminum sulfate solution (mol/L) | 0.02 | 0.04 | 0.05 | 0.06 | 0.1 |
| Speed of Low-speed mixer (rpm) | 30 | 40 | 50 | 60 | 70 |
| Mixing time (h) of low-speed mixer | 5 | 5.5 | 6 | 6.5 | 7 |
| The amount of the alkali-free accelerator incorporated in the cement/%) | 4 | 4.5 | 5 | 5.5 | 6 |
TABLE 2 Performance test results for comparative example 1 and examples 1 to 5
The performance test result of the table 2 shows that the alkali-free accelerator prepared by the invention can obviously accelerate the initial setting time and the final setting time of cement paste, and simultaneously improves the 1d compressive strength and has higher 28d strength retention rate. Therefore, the alkali-free accelerator has good accelerating and anti-compression effects, and has excellent and reliable performance when applied to engineering in the field of sprayed concrete.
The present invention is not limited to the above embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention are included in the scope of the claims of the present invention as filed.
Claims (8)
1. The alkali-free accelerator is characterized by comprising the following components in parts by mass: 40-50 parts of ammonia water, 40-50 parts of aluminum sulfate solution and 1-5 parts of stabilizer.
2. The alkali-free accelerator according to claim 1, comprising the following components in parts by mass: 45-50 parts of ammonia water, 45-50 parts of aluminum sulfate solution and 3-5 parts of stabilizer.
3. The alkali-free accelerator according to claim 2, wherein the concentration of the ammonia water is 0.12 to 0.6mol/L, and the concentration of the aluminum sulfate solution is 0.02 to 0.1 mol/L.
4. The alkali-free accelerator of claim 2, wherein the stabilizer comprises a welan gum.
5. The alkali-free accelerator according to claim 1, wherein the preparation method of the alkali-free accelerator comprises:
1) preparing an aluminum hydroxide gel suspension;
2) stirring the aluminum hydroxide suspension and the stabilizer for 1-2 hours at 180-200 rpm.
6. The alkali-free accelerator of claim 5, wherein the aluminum hydroxide gel suspension is prepared by a method comprising: and stirring the ammonia water and the aluminum sulfate solution for 5-7 hours at 30-70 rpm.
7. The alkali-free accelerator according to claim 6, wherein the preparation method of the aluminum sulfate solution comprises: mixing industrial aluminum sulfate and pseudo-boehmite according to the mass ratio of 2-7: 1, grinding, sieving by a sieve of 80-90 meshes, and mixing with water to obtain an aluminum sulfate solution.
8. The alkali-free accelerator according to claim 1, wherein the alkali-free accelerator is applied to sprayed concrete, and the addition amount of the alkali-free accelerator is 4-6% of the mass of a gelled material of the sprayed concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110043675.4A CN114763298A (en) | 2021-01-13 | 2021-01-13 | Alkali-free accelerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110043675.4A CN114763298A (en) | 2021-01-13 | 2021-01-13 | Alkali-free accelerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114763298A true CN114763298A (en) | 2022-07-19 |
Family
ID=82362934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110043675.4A Pending CN114763298A (en) | 2021-01-13 | 2021-01-13 | Alkali-free accelerator |
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| Country | Link |
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| CN (1) | CN114763298A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012112A (en) * | 2007-01-27 | 2007-08-08 | 葫芦岛市辽西混凝土外加剂有限公司 | High-strength concrete accelerator |
| CN101423356A (en) * | 2008-11-20 | 2009-05-06 | 同济大学 | Environment-friendly type alkali-free liquid accelerator for sprayed concrete and preparation method thereof |
| CN104193211A (en) * | 2014-08-18 | 2014-12-10 | 刘翠芬 | Heating-free non-alkali liquid accelerator for jetting concrete and preparation method of heating-free non-alkali liquid accelerator |
| CN105384376A (en) * | 2015-11-06 | 2016-03-09 | 湖北工业大学 | Preparing method for high-aluminum-content alkali-free chloride-free setting accelerator |
| CN111333362A (en) * | 2020-03-10 | 2020-06-26 | 刘翠芬 | Low-dosage high-early-strength alkali-free liquid accelerator and preparation method thereof |
-
2021
- 2021-01-13 CN CN202110043675.4A patent/CN114763298A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012112A (en) * | 2007-01-27 | 2007-08-08 | 葫芦岛市辽西混凝土外加剂有限公司 | High-strength concrete accelerator |
| CN101423356A (en) * | 2008-11-20 | 2009-05-06 | 同济大学 | Environment-friendly type alkali-free liquid accelerator for sprayed concrete and preparation method thereof |
| CN104193211A (en) * | 2014-08-18 | 2014-12-10 | 刘翠芬 | Heating-free non-alkali liquid accelerator for jetting concrete and preparation method of heating-free non-alkali liquid accelerator |
| CN105384376A (en) * | 2015-11-06 | 2016-03-09 | 湖北工业大学 | Preparing method for high-aluminum-content alkali-free chloride-free setting accelerator |
| CN111333362A (en) * | 2020-03-10 | 2020-06-26 | 刘翠芬 | Low-dosage high-early-strength alkali-free liquid accelerator and preparation method thereof |
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Application publication date: 20220719 |