CN116639906A - Impervious expanding agent and its preparing process and application - Google Patents
Impervious expanding agent and its preparing process and application Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 66
- 239000000463 material Substances 0.000 claims abstract description 51
- 235000014653 Carica parviflora Nutrition 0.000 claims abstract description 48
- 239000004576 sand Substances 0.000 claims abstract description 48
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 37
- 239000011707 mineral Substances 0.000 claims abstract description 37
- 239000000835 fiber Substances 0.000 claims abstract description 31
- 239000012530 fluid Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 13
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011575 calcium Substances 0.000 claims abstract description 13
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 13
- 239000011591 potassium Substances 0.000 claims abstract description 13
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 13
- 239000004566 building material Substances 0.000 claims abstract description 6
- 241000243321 Cnidaria Species 0.000 claims abstract 11
- 238000002156 mixing Methods 0.000 claims description 14
- 239000003638 chemical reducing agent Substances 0.000 claims description 13
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 11
- 239000013538 functional additive Substances 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 8
- 239000010881 fly ash Substances 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 8
- 230000003487 anti-permeability effect Effects 0.000 claims description 5
- 239000006229 carbon black Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000007580 dry-mixing Methods 0.000 claims description 4
- 238000000265 homogenisation Methods 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical class C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 2
- 239000011852 carbon nanoparticle Substances 0.000 claims description 2
- 239000002041 carbon nanotube Substances 0.000 claims description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 2
- 229910003472 fullerene Inorganic materials 0.000 claims description 2
- 150000004676 glycans Chemical class 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 229920001282 polysaccharide Polymers 0.000 claims description 2
- 239000005017 polysaccharide Substances 0.000 claims description 2
- 230000002579 anti-swelling effect Effects 0.000 claims 2
- 239000012754 barrier agent Substances 0.000 claims 1
- 238000009472 formulation Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 6
- 238000006703 hydration reaction Methods 0.000 abstract description 5
- 239000002904 solvent Substances 0.000 abstract description 4
- 238000009833 condensation Methods 0.000 abstract description 3
- 230000005494 condensation Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 244000132059 Carica parviflora Species 0.000 description 37
- 230000008961 swelling Effects 0.000 description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 239000000378 calcium silicate Substances 0.000 description 5
- 229910052918 calcium silicate Inorganic materials 0.000 description 5
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 5
- 229910001653 ettringite Inorganic materials 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229920001732 Lignosulfonate Polymers 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229920005646 polycarboxylate Polymers 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 244000166124 Eucalyptus globulus Species 0.000 description 2
- 244000082204 Phyllostachys viridis Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 241000219000 Populus Species 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 gangue Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229920005552 sodium lignosulfonate Polymers 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 238000004078 waterproofing 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
-
- 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
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 application relates to the technical field of expanding agents, in particular to an anti-seepage expanding agent, a preparation method and application thereof, wherein the anti-seepage expanding agent comprises the following components in parts by weight: 45-65 parts of mineral main material, 8-20 parts of modified coral sand, 5-20 parts of lignocellulose and 5-15 parts of solvent-free nano fluid, wherein the mineral main material comprises 35-60% calcium sulfoaluminate and 2-10% potassium sulfoaluminate. According to the application, mineral main materials containing calcium sulfoaluminate and potassium sulfoaluminate, porous fiber modified coral sand and lignocellulose are adopted as expansion sources, so that stress generated in different periods of building materials such as concrete can be dealt with, the expansion rate is matched with the hydration reaction rate of concrete condensation cores, and the anti-seepage performance is excellent; according to the application, the solvent-free nano fluid is used as a solvent, so that the contact with water in the preparation process of the expanding agent can be avoided, the later anti-seepage effect is improved, and the use time is prolonged.
Description
Technical Field
The application relates to the technical field of expanding agents, in particular to an anti-seepage expanding agent and a preparation method and application thereof.
Background
The main materials of the expanding agent are generally sulfoaluminate and ettringite, and the auxiliary materials are generally composed of fly ash, gypsum, gangue, kaolin, ettringite and the like according to the proportion. The expansion agent can generate expansion effect due to chemical reaction in the concrete, and the expansion is converted into compressive stress under the constraint of the reinforcing steel bars, so that the shrinkage and shrinkage of the concrete can be reduced or eliminated, and the shrinkage and the cracking of the concrete are prevented, and the concrete is densified. The impervious agent is mostly water-soluble polymer cementing material, which can seal capillary pores in concrete to realize self-waterproof structure. The two principles are different, the former is mainly compact concrete, and cracking is prevented; the latter is mainly used for waterproofing. Because the expanding agent can also realize self-waterproof structure, prolong the interval of expansion joints, and has lower price and more convenient use, the present domestic impervious concrete generally uses the expanding agent instead of the impervious agent.
The expanding agents used in the market at present comprise U-shaped low-carbon high-efficiency concrete expanding agents (UEA-H), ettringite expanding agents (AEA), calcium oxide expanding agents (HEA), magnesium oxide expanding agents and the like. Wherein, the ettringite expanding agent has large mixing amount and high alkali content, and the expansion rate is not matched with the hydration reaction rate of the concrete setting core; the calcium oxide expanding agent is not easy to store, the expansion rate of the calcium oxide expanding agent is not coordinated with the shrinkage rate of concrete, and the expansion rate is too high; the magnesium oxide expanding agent has an excessively slow expansion speed, and the expansion start time is far behind the contraction start time of concrete. The expanding agent provided by the prior art is easy to permeate water after long-time use, cannot have excellent impermeability, has poor using effect, and cannot meet the requirement of the construction on the expansion performance of concrete. Therefore, the existing market lacks an impervious concrete with good use effect, wherein the expansion rate of the impervious concrete is matched with the hydration reaction rate of the concrete setting core.
Disclosure of Invention
The application aims to provide an anti-seepage expanding agent, a preparation method and application thereof, and aims to solve the problems in the background technology.
The application is realized by the following technical scheme:
the impervious swelling agent comprises the following components in parts by weight: 45-65 parts of mineral main material, 8-20 parts of modified coral sand, 5-20 parts of lignocellulose and 5-15 parts of solvent-free nano fluid, wherein the mineral main material comprises 35-60% calcium sulfoaluminate and 2-10% potassium sulfoaluminate.
As a further scheme of the application, the mineral main material further comprises at least one of silicate, sulfate, carbonate and fly ash.
As a further scheme of the application, the modified coral sand is porous fiber doped modified coral sand, and the doping amount of the porous fiber is 0.05-0.5%.
Preferably, the fiber length of the porous fiber is 200-500 μm, and the pore diameter of the pores is less than 100nm.
As a further aspect of the present application, the solvent-free nanofluid is selected from solvent-free TiO 2 Nanofluid, solvent-free CaCO 3 Nanofluid, solvent-free SiO 2 A combination of one or more of nanofluids, solvent-free ZnO nanofluids, and solvent-free nanofluids based on carbon nanoparticles selected from at least one of carbon black, carbon quantum dots, carbon nanotubes, fullerenes.
As a further scheme of the application, the anti-seepage expansion agent component also comprises a functional additive, which comprises the following components in parts by weight: 45-65 parts of mineral materials, 8-20 parts of modified coral sand, 5-20 parts of lignocellulose, 5-15 parts of solvent-free nano fluid and 0.5-3 parts of functional additives, wherein the mineral materials comprise 35-60% calcium sulfoaluminate and 2-10% potassium sulfoaluminate.
As a further scheme of the application, the functional additive is selected from any one of a water reducer, a polysaccharide retarder and a phosphate retarder, and the water reducer is any one of a lignosulfonate water reducer, a polycarboxylate water reducer or a compound water reducer thereof, wherein the mass ratio of lignosulfonate to polycarboxylic acid in the lignosulfonate-polycarboxylic acid compound water reducer is 0.2-5: 1, the lignosulfonate is preferably sodium lignosulfonate.
The application also provides a preparation method of the anti-seepage expanding agent, which comprises the following steps:
s1, uniformly mixing porous fibers and coral sand in proportion in a dry mixing manner, and adding solvent-free nanofluid in batches under the condition of continuous stirring, wherein the feed-liquid ratio is 1: 1-5, homogenizing to obtain modified coral sand;
s2, mixing and crushing mineral aggregate main materials containing multiple components, mixing with lignocellulose, solvent-free nano fluid and the modified coral sand obtained in the step S1 in proportion, grinding, and sieving with 200-400 meshes to obtain the coral sand with the specific surface area of 6000-8000 cm 2 Mixing materials of/g;
and S3, conveying the mixed material obtained in the step S2 to a homogenizer for homogenization to obtain the target anti-seepage expanding agent.
As a further scheme of the application, in the step S2, the mineral aggregate main material is crushed and then mixed with lignocellulose, solvent-free nano-fluid, functional additive and modified coral sand obtained in the step S1 in proportion.
The anti-seepage expanding agent provided by the application can be applied to building materials.
Compared with the prior art, the application has the beneficial effects that:
the preparation method provided by the application is convenient to operate, adopts mineral main materials containing calcium sulfoaluminate and potassium sulfoaluminate, porous fiber modified coral sand and lignocellulose as expansion sources, can cope with stress generated by building materials such as concrete in different periods, has an expansion rate matched with the hydration reaction rate of concrete condensation cores, and has excellent anti-permeability performance; according to the application, the solvent-free nano fluid is used as a solvent, so that the contact with water in the preparation process of the expanding agent can be avoided, the later anti-seepage effect is improved, and the use time is prolonged.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Unless otherwise specified, the reagents used in the examples were all readily available from commercial companies.
Example 1:
the embodiment provides an anti-seepage expanding agent which comprises the following components in parts by weight: 45 parts of mineral main material, 20 parts of modified coral sand, 20 parts of lignocellulose and 15 parts of solvent-free CaCO 3 A nanofluid. Wherein the mineral main material consists of 60% calcium sulfoaluminate, 10% potassium sulfoaluminate, 15% calcium silicate and 15% fly ash; the modified coral sand is prepared by doping porous fiber with modified coral sand, the doping amount of the porous fiber is 0.05%, the porous fiber is polyester hollow three-dimensional crimped short fiber, the fiber length is 200-500 mu m, and the pore diameter of the pore is smallAt 100nm; the lignocellulose raw material is selected from cellulose-rich plants such as poplar, eucalyptus, bamboo and agricultural straw.
The embodiment also provides a preparation method of the anti-seepage expanding agent, which specifically comprises the following steps:
s1, dry-mixing polyester hollow three-dimensional crimped staple fibers and coral sand uniformly, wherein the fiber doping amount is 0.05%, and adding solvent-free CaCO (CaCO) in batches under the condition of continuous stirring 3 Nanofluid, feed-to-liquid ratio is 1:5, homogenizing to obtain modified coral sand;
s2, mixing calcium sulfoaluminate, potassium sulfoaluminate, calcium silicate and fly ash according to a set proportion to obtain a mineral main material, crushing the mineral main material, and mixing the crushed mineral main material with lignocellulose and solvent-free CaCO 3 Nanofluid, modified coral sand obtained in step S1 according to 45:20:15:20, grinding, sieving with 200-400 mesh sieve to obtain the product with specific surface area of 6000-8000 cm 2 Mixing materials of/g;
and S3, conveying the mixed material obtained in the step S2 to a homogenizer for homogenization to obtain the target anti-seepage expanding agent.
Example 2:
the embodiment provides an anti-seepage expanding agent and a preparation method thereof, wherein the anti-seepage expanding agent comprises the following components in parts by weight: 55 parts of mineral main material, 20 parts of modified coral sand, 10 parts of lignocellulose and 15 parts of solvent-free SiO 2 A nanofluid. Wherein the mineral main material consists of 55% calcium sulfoaluminate, 5% potassium sulfoaluminate, 15% calcium silicate, 15% calcium carbonate and 10% fly ash; the modified coral sand is prepared by doping porous fibers with the modified coral sand, the doping amount of the porous fibers is 0.15%, the porous fibers are polyester hollow three-dimensional crimped short fibers, the fiber length is 200-500 mu m, and the pore diameter of the pores is less than 100nm; the lignocellulose raw material is selected from cellulose-rich plants such as poplar, eucalyptus, bamboo and agricultural straw.
The embodiment also provides a preparation method of the anti-seepage expanding agent, which specifically comprises the following steps:
s1, mixing the polyester hollow three-dimensional crimped staple fibers with coral sand in a dry mixing way, wherein the fiber doping amount is 0.15%,the solvent-free SiO is added in portions with continuous stirring 2 Nanofluid, feed-to-liquid ratio is 1:5, homogenizing to obtain modified coral sand;
s2, mixing calcium sulfoaluminate, potassium sulfoaluminate, calcium silicate, calcium carbonate and fly ash according to a set proportion to obtain a mineral main material, crushing the mineral main material, and mixing the crushed mineral main material with lignocellulose and solvent-free SiO 2 Nanofluid, modified coral sand obtained in step S1 according to 55:10:15:20 weight ratio;
and S3, conveying the mixed material obtained in the step S2 to a homogenizer for homogenization to obtain the target anti-seepage expanding agent.
Example 3:
the present example provides a barrier expansion agent, which is substantially identical to example 1, except that it comprises the following components in parts by weight: 60 parts of ore main material, 15 parts of modified coral sand, 10 parts of lignocellulose and 10 parts of solvent-free CaCO 3 Nanofluid, 5 parts of solvent-free SiO 2 The doping amount of the porous fiber in the modified coral sand is 0.15 percent.
The embodiment also provides a preparation method of the anti-seepage swelling agent, which is different from the embodiment 1 in that in the step S1, the doping amount of the fiber is 0.15%; in the step S2, the mineral aggregate main material is crushed and then is mixed with lignocellulose and CaCO without solvent 3 Nanofluid, solvent-free SiO 2 Nanofluid, modified coral sand obtained in step S1 according to the proportion of 60:10:10:5:15 weight ratio; the remaining steps are identical to those of example 1.
Example 4:
the present example provides a barrier expansion agent, which is substantially identical to example 1, except that it comprises the following components in parts by weight: 65 parts of mineral main material, 8 parts of modified coral sand, 15 parts of lignocellulose and 12 parts of solvent-free carbon black nano fluid, wherein the mineral main material consists of 60% calcium sulfoaluminate, 10% potassium sulfoaluminate, 10% calcium silicate, 5% calcium carbonate and 15% fly ash, and the doping amount of porous fibers in the modified coral sand is 0.5%.
The embodiment also provides a preparation method of the anti-seepage swelling agent, which is different from the embodiment 1 in that in the step S1, the doping amount of the fiber is 0.5%, the solvent-free carbon black nanofluid is added in batches under the condition of continuous stirring, and the feed-liquid ratio is 1:5, homogenizing to obtain modified coral sand; in the step S2, the mineral aggregate main material is crushed and then mixed with lignocellulose, solvent-free carbon black nano fluid and the modified coral sand obtained in the step S1 according to the proportion of 65:15:12:8 weight ratio; the remaining steps are identical to those of example 1.
Example 5:
the present example provides a barrier expansion agent, which is substantially identical to example 3, and is different in that it comprises the following components in parts by weight: 60 parts of ore main material, 15 parts of modified coral sand, 10 parts of lignocellulose and 10 parts of solvent-free CaCO 3 Nanofluid, 5 parts of solvent-free SiO 2 Nano fluid, 0.5 part of sodium lignin sulfonate water reducer.
The embodiment also provides a preparation method of the anti-seepage swelling agent, which is different from the embodiment 3 in that in the step S2, the mineral aggregate main material is crushed and then is mixed with lignocellulose and solvent-free CaCO 3 Nanofluid, solvent-free SiO 2 Nano fluid, sodium lignin sulfonate water reducer and modified coral sand obtained in the step S1 according to the proportion of 60:10:10:5:0.5:15 weight ratio; the remaining steps are identical to those of example 3.
Example 6:
the present example provides a barrier expansion agent, which is substantially identical to example 3, and is different in that it comprises the following components in parts by weight: 60 parts of ore main material, 15 parts of modified coral sand, 10 parts of lignocellulose and 10 parts of solvent-free CaCO 3 Nanofluid, 5 parts of solvent-free SiO 2 Nanofluid, 0.5 part of polycarboxylate water reducer (model ZM-4).
The embodiment also provides a preparation method of the anti-seepage swelling agent, which is different from the embodiment 3 in that in the step S2, the mineral aggregate main material is crushed and then is mixed with lignocellulose and solvent-free CaCO 3 Nanofluid, insolubleSiO agent 2 Nano fluid, polycarboxylate water reducer and modified coral sand obtained in the step S1 according to the proportion of 60:10:10:5:0.5:15 weight ratio; the remaining steps are identical to those of example 3.
Example 7:
the present example provides a barrier expansion agent, which is substantially identical to example 3, and is different in that it comprises the following components in parts by weight: 60 parts of ore main material, 15 parts of modified coral sand, 10 parts of lignocellulose and 10 parts of solvent-free CaCO 3 Nanofluid, 5 parts of solvent-free SiO 2 Nano fluid, 1 part of sodium lignin sulfonate and polycarboxylic acid compound water reducer.
The embodiment also provides a preparation method of the anti-seepage swelling agent, which is different from the embodiment 3 in that in the step S2, the mineral aggregate main material is crushed and then is mixed with lignocellulose and solvent-free CaCO 3 Nanofluid, solvent-free SiO 2 Nano fluid, sodium lignin sulfonate and polycarboxylic acid compound water reducer, and modified coral sand obtained in the step S1 is prepared by the following steps: 10:10:5:1:15 weight ratio; the remaining steps are identical to those of example 3.
The anti-permeability expanding agents provided in examples 1 to 7 of the present application can be applied to building materials.
The raw material components and contents of the anti-permeation swelling agents provided in examples 1 to 7 are shown in tables 1 to 2, respectively.
Table 1:
| raw material composition | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 |
| Mineral main material | 45 parts of | 55 parts of | 60 parts of | 65 parts of | 55 parts of | 55 parts of | 55 parts of |
| Modified coral sand | 20 parts of | 20 parts of | 15 parts of | 8 parts of | 20 parts of | 20 parts of | 20 parts of |
| Lignocellulose | 20 parts of | 10 parts of | 10 parts of | 15 parts of | 10 parts of | 10 parts of | 10 parts of |
| Solvent-free nanofluids | 15 parts of | 15 parts of | 15 parts of | 12 parts of | 15 parts of | 15 parts of | 15 parts of |
| Functional additive | / | / | / | / | 0.5 part | 0.5 part | 1 part of |
Table 2:
comparative example 1: ettringite expander AEA, ancient town, cat No. 202002130006;
comparative example 2: calcium oxide expander HEA, ancient town, cat No. 20191120002.
The swelling agents provided in examples 1 to 7 and comparative examples 1 to 2 were respectively incorporated into concrete at an amount of 8%, and performance tests were conducted according to the execution standards of "concrete swelling agent" GB23439-2009, GB175-2017, GB/T23439-2017, respectively, and the test parameters and results are shown in Table 3.
Table 3:
as shown by the detection results of Table 3, the expanding agent provided by the embodiment of the application meets the GB23439-2009 and JC474-2008 standards, and has better impermeability than the AEA expanding agent and HEA expanding agent in the existing market. As can be seen from a comparison of the data in tables 1-3, the swelling agent provided in example 7 of the present application has the optimum permeation resistance parameters. According to the application, mineral main materials containing calcium sulfoaluminate and potassium sulfoaluminate, porous fiber modified coral sand and lignocellulose are adopted as expansion sources, so that stress generated in different periods of building materials such as concrete can be dealt with, the expansion rate is matched with the hydration reaction rate of concrete condensation cores, and the anti-seepage performance is excellent; according to the application, the solvent-free nano fluid is used as a solvent, so that the contact with water in the preparation process of the expanding agent can be avoided, the later anti-seepage effect is improved, and the use time is prolonged.
The preferred embodiments of the application disclosed above are intended only to assist in the explanation of the application. The preferred embodiments are not exhaustive or to limit the application to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and the practical application, to thereby enable others skilled in the art to best understand and utilize the application. The application is limited only by the claims and the full scope and equivalents thereof.
Claims (10)
1. The anti-seepage expanding agent is characterized by comprising the following components in parts by weight: 45-65 parts of mineral main material, 8-20 parts of modified coral sand, 5-20 parts of lignocellulose and 5-15 parts of solvent-free nano fluid, wherein the mineral main material comprises 35-60% calcium sulfoaluminate and 2-10% potassium sulfoaluminate.
2. The expansion resistant formulation of claim 1, wherein said mineral host material further comprises at least one of silicate, sulfate, carbonate, fly ash.
3. An anti-permeability and anti-swelling agent according to claim 1, wherein the modified coral sand is porous fiber doped modified coral sand, and the porous fiber doping amount is 0.05-0.5%.
4. A barrier expansion agent according to claim 3, wherein the porous fibers have a fiber length of 200 to 500 μm and a pore size of less than 100nm.
5. The barrier expansion agent of claim 1, wherein said solvent-free nanofluid is selected from solvent-free TiO 2 Nanofluid, solvent-free CaCO 3 Nanofluid, solvent-free SiO 2 A combination of one or more of nanofluids, solvent-free ZnO nanofluids, and solvent-free nanofluids based on carbon nanoparticles selected from at least one of carbon black, carbon quantum dots, carbon nanotubes, fullerenes.
6. The expansion barrier agent of claim 1, further comprising a functional additive comprising the following components in parts by weight: 45-65 parts of mineral materials, 8-20 parts of modified coral sand, 5-20 parts of lignocellulose, 5-15 parts of solvent-free nano fluid and 0.5-3 parts of functional additives, wherein the mineral materials comprise 35-60% calcium sulfoaluminate and 2-10% potassium sulfoaluminate.
7. The expansion-resistant agent according to claim 6, wherein said functional additive is selected from any one of a water reducing agent, a polysaccharide retarder, and a phosphate retarder.
8. The method of preparing a barrier expansion agent according to any of claims 1 to 7, comprising the steps of:
s1, uniformly mixing porous fibers and coral sand in proportion in a dry mixing manner, and adding solvent-free nanofluid in batches under the condition of continuous stirring, wherein the feed-liquid ratio is 1: 1-5, homogenizing to obtain modified coral sand;
s2, crushing the main mineral aggregate material, and mixing with lignocellulose and solvent-free nano fluidMixing the modified coral sand obtained in the step S1 in proportion, grinding, sieving with 200-400 meshes to obtain the coral sand with the specific surface area of 6000-8000 cm 2 Mixing materials of/g;
and S3, conveying the mixed material obtained in the step S2 to a homogenizer for homogenization to obtain the target anti-seepage expanding agent.
9. The method for preparing an anti-permeability and anti-swelling agent according to claim 8, wherein in the step S2, the mineral aggregate main material is crushed and then mixed with lignocellulose, a solvent-free nano-fluid, a functional additive and the modified coral sand obtained in the step S1 in proportion.
10. Use of the anti-permeability expanding agent according to any one of claims 1 to 7 in a building material.
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| CN113321474A (en) * | 2021-07-21 | 2021-08-31 | 四川佰汇混凝土工程有限公司 | Anti-seepage sprayed concrete |
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