CN116040978A - Additive for improving working performance of high-strength grouting product - Google Patents
Additive for improving working performance of high-strength grouting product Download PDFInfo
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- CN116040978A CN116040978A CN202310168477.XA CN202310168477A CN116040978A CN 116040978 A CN116040978 A CN 116040978A CN 202310168477 A CN202310168477 A CN 202310168477A CN 116040978 A CN116040978 A CN 116040978A
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- 239000000654 additive Substances 0.000 title claims abstract description 52
- 230000000996 additive effect Effects 0.000 title claims abstract description 50
- 239000000843 powder Substances 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 16
- 229920005646 polycarboxylate Polymers 0.000 claims abstract description 16
- 229910052604 silicate mineral Inorganic materials 0.000 claims abstract description 13
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000010440 gypsum Substances 0.000 claims abstract description 9
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 9
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 9
- 239000003513 alkali Substances 0.000 claims abstract description 8
- 239000001913 cellulose Substances 0.000 claims abstract description 8
- 229920002678 cellulose Polymers 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 7
- 239000011325 microbead Substances 0.000 claims abstract description 6
- 239000000084 colloidal system Substances 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 229920000858 Cyclodextrin Polymers 0.000 claims description 6
- 239000001116 FEMA 4028 Substances 0.000 claims description 6
- 229960004853 betadex Drugs 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 4
- 239000008103 glucose Substances 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- WHGYBXFWUBPSRW-FOUAGVGXSA-N beta-cyclodextrin Chemical compound OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO WHGYBXFWUBPSRW-FOUAGVGXSA-N 0.000 claims description 3
- 235000011175 beta-cyclodextrine Nutrition 0.000 claims description 3
- 235000013379 molasses Nutrition 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- HZVVJJIYJKGMFL-UHFFFAOYSA-N almasilate Chemical compound O.[Mg+2].[Al+3].[Al+3].O[Si](O)=O.O[Si](O)=O HZVVJJIYJKGMFL-UHFFFAOYSA-N 0.000 claims description 2
- 239000002585 base Substances 0.000 claims description 2
- 239000011324 bead Substances 0.000 claims description 2
- 125000002791 glucosyl group Chemical group C1([C@H](O)[C@@H](O)[C@H](O)[C@H](O1)CO)* 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 235000020357 syrup Nutrition 0.000 claims description 2
- 239000006188 syrup Substances 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 49
- 239000000047 product Substances 0.000 abstract description 15
- 239000004568 cement Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 230000036571 hydration Effects 0.000 abstract description 3
- 238000006703 hydration reaction Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000440 bentonite Substances 0.000 abstract description 2
- 229910000278 bentonite Inorganic materials 0.000 abstract description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 239000002274 desiccant Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000011265 semifinished product Substances 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 18
- 239000003795 chemical substances by application Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000012496 blank sample Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 239000002518 antifoaming agent Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 2
- 229910052808 lithium carbonate Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000003469 silicate cement Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 102100038694 DNA-binding protein SMUBP-2 Human genes 0.000 description 1
- 101000665135 Homo sapiens DNA-binding protein SMUBP-2 Proteins 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses an additive for improving working performance of a high-strength grouting product, which consists of cellulose, microbead powder, protective colloid, a polycarboxylate water reducer, silica fume, cured gypsum powder, solid alkali, magnesium aluminum silicate mineral powder and a retarder. The magnesium aluminum silicate mineral powder in the additive component plays a role of a drying agent in the semi-finished product period of the grouting material, so that the grouting material is free from caking and moisture before being used, and the early hydration phenomenon of absorbing water in the air after the cement silicate prefabricated product is contacted with the air is effectively inhibited to influence the later strength. And the magnesia-alumina silicate mineral powder with the specific component forms a muddy water film similar to bentonite after meeting water and is adsorbed on the wall of the grouting pipe, so that the passing efficiency of the grouting material in a pipeline is greatly increased, and the pipe blocking phenomenon in the grouting process is reduced. In a certain adding amount range, the strength of the grouting material product is linearly increased along with the increasing of the adding amount of the additive, so that the production cost of the high-strength grouting material is favorably controlled.
Description
Technical Field
The invention relates to the field of building materials, in particular to an additive for improving working performance of a high-strength grouting product.
Background
Grouting is to fill slurry with fluidity and gelation property, such as cement, lime or other chemical materials, into the foundation soil in a certain range under the foundation by drilling holes (or pre-buried pipes) so as to fill cracks and pores in the soil, prevent the leakage of the foundation and improve the integrity, strength and rigidity of the soil. Along with the continuous construction and development of high-speed railways and large bridges, the application of the high-performance grouting material is more and more extensive. The high-performance grouting material is a grouting material with excellent durability, and is mainly characterized by high strength, high impermeability, high workability and high volume stability, and is an important development direction of grouting material technology. The method is suitable for construction with high early strength, no shrinkage and high flow state requirements, such as secondary grouting of large and medium-sized equipment, anchoring of foundation bolts, backing plate seat slurry, engineering repair, rush repair and the like.
At present, several grouting materials exist on the market, but all have a plurality of problems. For example, the early strength is insufficient, so that the construction progress is slowed down, and the construction period is influenced. And for example, the construction is difficult due to poor working performance, and the grouting is not compact and cracked due to large shrinkage. The problems seriously affect the construction period and the construction quality of engineering, and also cause great hidden trouble to the engineering of bridges, railways, tunnels and the like, thereby seriously affecting the safety of national infrastructure construction.
The Chinese patent CN20110185843. X discloses a cement-based grouting material and a preparation method thereof, wherein the grouting material consists of sulfoaluminate cement, river sand, an expanding agent, a polycarboxylate water reducer, a defoaming agent, boric acid, lithium carbonate and the like, wherein the expanding agent is one or more of a UEA expanding agent, a HCSA expanding agent, a SY-G expanding agent or a Dingli brand HEA expanding agent. The practical construction shows that the grouting material is very easy to cause pipeline blockage, so that the problem that the grouting material is not compact and cannot meet the process requirements occurs.
Chinese patent CN202210016772.9 discloses an early strength high strength sleeve grouting material and a preparation method thereof, the grouting material is composed of silicate cement clinker, double fast sulphoaluminate cement, silica powder, fine quartz sand, polycarboxylic acid powder water reducer, plastic expansion agent, powder defoaming agent, lithium carbonate, rheological agent, high strength synthetic fiber, inorganic salt early strength agent and alkali excitant. In order to solve the problem of pipe blockage, the cellulose ether serving as an internal rheology agent is added into the component, but the effect is still not ideal.
Disclosure of Invention
On the premise of ensuring grouting materials, in order to solve the problem of pipe blockage of the traditional grouting materials and improve the early fluidity of the high-strength grouting materials, the invention provides an additive comprising the following components:
and weighing and uniformly stirring the raw materials according to the proportion requirement to obtain the additive for improving the early flowability of the high-strength grouting product.
The additive comprises the following components in percentage by weight: 1, the ratio of the sum of the amount of magnesium-containing substances and the amount of silicon-containing substances in magnesium aluminosilicate is 1:1.4 to 1.5, and the particle size range of the magnesium aluminum silicate mineral powder is 10 to 50 mu m.
The weight average molecular weight of the cellulose is not lower than 40 ten thousand, and the cellulose can form stretched grid fibers in a grouting material product, so that the toughness and the flexural strength of the grouting material product are improved.
The particle size of the microbead powder ranges from 20 to 80 mu m, and the additive plays a role in lubrication and improves the fluidity of grouting materials.
The additive is characterized in that the protective colloid is one or more of polyvinyl alcohol, beta-cyclodextrin and methylated-beta-cyclodextrin, and plays a role in retarding certain, and meanwhile, the water tightness of the grouting material is increased, the water retention time of the grouting material is prolonged, and the maintenance effect is enhanced.
The additive is one or more of a general type polycarboxylate water reducer, an early strength polycarboxylate water reducer, a slump retaining polycarboxylate water reducer and a slow release polycarboxylate water reducer, and is used for reducing the mixing water consumption of grouting materials so as to improve the strength of the grouting materials.
The additive has the advantages that the silicon content in the silica fume is not lower than 99%, the particle size range of the silica fume is 1500-1800 meshes, the alkali aggregate reaction can be effectively inhibited, the electric chloride ion permeation resistance of the high-strength grouting material is reduced, and the service life of the grouting material product is prolonged.
The additive, wherein the cured gypsum powder is white powder, the particle size of D98 is 20-50 mu m, and the content of effective substances is more than 90%. Early hydration of tetracalcium aluminate in cement is inhibited by adding cured gypsum powder, and the construction performance of the grouting material is maintained.
The additive, wherein the solid base is MgO, caO, mg (OH) 2 Or Ca (OH) 2 One or more of the above aims to stimulate the 1-day strength of the silicate cement by an alkali stimulation mechanism and improve the early strength of the grouting material.
According to the additive, the retarder is glucose syrup or molasses, and the setting time of concrete is controlled by adjusting the addition amount of the retarder so as to meet the use requirements of different working conditions.
Compared with the grouting material products in the current market, the additive for improving the working performance of the high-strength grouting product has the following advantages:
1. the magnesium aluminum silicate mineral powder in the additive formula plays a role of a drying agent in the semi-finished product period of the grouting material, so that the grouting material is free from caking and moisture before being used, and the early hydration phenomenon of absorbing water in the air after the cement silicate prefabricated product is contacted with the air is effectively inhibited to influence the later strength.
2. The magnesia-alumina silicate mineral powder with specific components in the additive formula forms a muddy water film similar to bentonite after meeting water and is adsorbed on the wall of a grouting pipe, so that the passing efficiency of grouting materials in a pipeline is greatly increased, and the pipe blocking phenomenon in the grouting process is reduced.
3. The magnesium aluminum silicate mineral powder, the bead powder and the curing gypsum powder are matched in proportion for use, so that the grouting material can obtain good fluidity, and the workability of the grouting material is maintained.
4. Experiments show that in a certain range, the strength of a grouting material product is linearly increased along with the increasing of the additive amount of the additive in the high-strength grouting material, so that the production cost of the high-strength grouting material is favorably controlled.
Detailed Description
The invention will be further illustrated with reference to examples. It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
In order to prove the influence of the additive for improving the working performance of the high-strength grouting product on the flowability and strength of the grouting product, the following test scheme is designed:
determining the components of the blank grouting material: 500 parts of 52.5-grade Portland cement, 600 parts of quartz sand, 20 parts of an expanding agent, 2 parts of a polycarboxylate water reducer, 1 part of a defoaming agent, 0.5 part of a stabilizer and 0.5 part of a plastic expanding agent. The components are weighed according to the proportion, and the blank grouting material is obtained after uniform mixing.
Additive 1 comprises the following components: 5 parts of cellulose, 200 parts of micro-bead powder, 6 parts of beta-cyclodextrin, 10 parts of early-strength polycarboxylate superplasticizer, 120 parts of silica fume, 100 parts of cured gypsum powder and Ca (OH) 2 40 parts of solid alkali, 800 parts of magnesium aluminum silicate mineral powder and 50 parts of glucose retarder. The components are weighed according to the proportion, and the additive 1 is obtained after uniform mixing.
Additive 2 comprises the following components: 3 parts of cellulose, 160 parts of microbead powder, 8 parts of methylated-beta-cyclodextrin, 5 parts of a general polycarboxylate water reducer, 90 parts of silica fume, 150 parts of cured gypsum powder, 12 parts of MgO solid alkali, 500 parts of magnesium aluminum silicate mineral powder and 30 parts of molasses retarder. The components are weighed according to the proportion, and the additive 2 is obtained after uniform mixing.
Additive 3 comprises the following components: 1 part of cellulose, 120 parts of micro-bead powder, 3 parts of polyvinyl alcohol protective colloid, 4 parts of slow-release polycarboxylate water reducer, 150 parts of silica fume, 80 parts of cured gypsum powder, 15 parts of CaO solid alkali, 600 parts of magnesium aluminum silicate mineral powder and 15 parts of glucose retarder. The components are weighed according to the proportion, and the additive 2 is obtained after uniform mixing.
4 parts of blank grouting materials with the weight of 800 parts are weighed, 50 parts of each of the additive 1, the additive 2 and the additive 3 are respectively weighed, the weighed additive 1, additive 2 and additive 3 are respectively added into 3 parts of blank grouting materials and are uniformly stirred to obtain a sample 1, a sample 2 and a sample 3, and the other part of blank grouting materials without the additive is a blank sample. The water adding amount of each sample is controlled to be 12% -13%, and the total amount of each sample can ensure that grouting material stably runs in a pumping pipeline for more than 30 minutes.
And (3) conveying the four samples by using pumping equipment, starting to run timely after the pumping equipment is in normal operation, closing the pumping equipment after the pumping equipment is in stable operation for 30 minutes, cleaning grouting materials attached to the grouting pipe wall, weighing, comparing the attached quantity of each sample, and simultaneously measuring the initial fluidity and 30-minute fluidity of each sample, wherein the test is described in the following table 1.
Table 1 test results for each sample
| Blank sample | Sample 1 | Sample 2 | Sample 3 | |
| Weight/kg of attached slurry | 43.56 | 16.73 | 15.84 | 16.22 |
| Initial fluidity/mm | 290 | 315 | 320 | 310 |
| Fluidity/mm for 30min | 250 | 295 | 290 | 295 |
And weighing 5 parts of blank grouting material with the weight of 800 parts, preparing an additive 2, weighing 30 parts, 50 parts, 70 parts, 90 parts and 110 parts respectively, adding the additive into the blank grouting material with the weight of 5 parts respectively, controlling the water adding amount to be 12-13%, uniformly stirring, and sequentially obtaining samples 4-8 according to the adding amount of the additive.
Filling blank samples and 4-8 samples into 40mm 160mm test molds respectively, placing the test molds in a forming chamber for 2 hours, then moving the test molds into a curing chamber, wherein the temperature of the forming chamber is 20+/-2 ℃, the relative humidity is more than 50%, the temperature of the curing chamber is 20+/-1 ℃, the relative humidity is not less than 90%, demolding after the curing chamber is cured for 8 hours, and testing the compressive strength performance of the samples for 10 hours, 1d, 3d and 28d by using a pressure tester, wherein the test results are shown in the following table 2:
table 2 compressive strength test results for each sample
| Blank sample | Sample 4 | Sample 5 | Sample 6 | Sample 7 | Sample 8 | |
| 10h compressive Strength/MPa | 28.3 | 35.9 | 38.1 | 39.2 | 38.5 | 36.0 |
| 1d compressive Strength/MPa | 41.3 | 50.9 | 55.6 | 57.1 | 57.6 | 52.8 |
| 3d compressive Strength/MPa | 65.8 | 76.4 | 79.2 | 82.3 | 84.5 | 79.9 |
| 28d compressive Strength/MPa | 97.4 | 105.0 | 106.7 | 108.3 | 107.6 | 105.4 |
From the data in tables 1 and 2, it is seen that the samples with additives have good flowability, the weight of the slurry adhering to the pipe wall is significantly lower than that of the blank samples without additives, and the early strength is high. In a certain addition amount range, as the addition amount of the additive increases, the compressive strength of the sample increases.
It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. Although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the techniques described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The additive for improving the working performance of the high-strength grouting product is characterized by comprising the following components in parts by weight: 1-5 parts of cellulose, 100-200 parts of microbead powder, 2-8 parts of protective colloid, 2-10 parts of polycarboxylate water reducer, 80-150 parts of silica fume, 80-150 parts of cured gypsum powder, 10-50 parts of solid alkali, 500-800 parts of magnesium aluminum silicate mineral powder and 10-50 parts of retarder;
and weighing and uniformly stirring the raw materials according to the proportion requirement to obtain the additive for improving the working performance of the high-strength grouting product.
2. The additive for improving the working performance of high-strength grouting products according to claim 1, wherein the ratio of the amount of silicon to aluminum substances contained in the magnesium aluminum silicate mineral powder is 20-25: 1, the ratio of the sum of the amount of magnesium-containing substances and the amount of silicon-containing substances in magnesium aluminosilicate is 1:1.4 to 1.5, and the particle size range of the magnesium aluminum silicate mineral powder is 10 to 50 mu m.
3. An additive for improving workability of a high-strength grouting product as claimed in claim 1, wherein the weight average molecular weight of the cellulose is not less than 40 ten thousand.
4. The additive for improving the workability of a high-strength grouting product as claimed in claim 1, wherein the particle size of the bead powder is 20-80 μm.
5. The additive for improving the working performance of a high-strength grouting product according to claim 1, wherein the protective colloid is one or more of polyvinyl alcohol, beta-cyclodextrin and methylated-beta-cyclodextrin.
6. The additive for improving the working performance of a high-strength grouting product according to claim 1, wherein the polycarboxylate water reducer is one or more of a general-purpose polycarboxylate water reducer, an early-strength polycarboxylate water reducer, a slump-retaining polycarboxylate water reducer and a slow-release polycarboxylate water reducer.
7. The additive for improving the workability of a high-strength grouting product as recited in claim 1, wherein the silicon content in the silica fume is not less than 99%, and the particle size of the silica fume is 1500-1800 mesh.
8. The additive for improving the working performance of a high-strength grouting product according to claim 1, wherein the cured gypsum powder is white powder, the D98 particle size is 20-50 μm, and the content of effective substances is more than 90%.
9. An additive for improving the workability of a high strength grouting product as claimed in claim 1, wherein the solid base is MgO, caO, mg (OH) 2 Or Ca (OH) 2 One or more of them.
10. An additive for improving the workability of a high-strength grouting product as claimed in claim 1, wherein the retarder is glucose syrup or molasses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310168477.XA CN116040978A (en) | 2023-02-27 | 2023-02-27 | Additive for improving working performance of high-strength grouting product |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310168477.XA CN116040978A (en) | 2023-02-27 | 2023-02-27 | Additive for improving working performance of high-strength grouting product |
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| CN116040978A true CN116040978A (en) | 2023-05-02 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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