CN106587713A - Concrete anticorrosive airtight agent and preparation method thereof - Google Patents
Concrete anticorrosive airtight agent and preparation method thereof Download PDFInfo
- Publication number
- CN106587713A CN106587713A CN201611041588.0A CN201611041588A CN106587713A CN 106587713 A CN106587713 A CN 106587713A CN 201611041588 A CN201611041588 A CN 201611041588A CN 106587713 A CN106587713 A CN 106587713A
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- CN
- China
- Prior art keywords
- concrete
- agent
- concrete air
- antiseptic concrete
- tight
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Classifications
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- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2652—Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
-
- 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
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/61—Corrosion inhibitors
Abstract
The invention relates to a concrete anticorrosive airtight agent and a preparation method thereof, belonging to the application field of concrete admixture. The concrete anticorrosive airtight agent is characterized by comprising the following raw material components in mass percent: 20-38% of a polycarboxylic high performance water-reducing agent, 10-15% of organosilane, 0.01-0.03% of polyacrylamide, 0.02-0.08% of an antifoaming agent, 0.04-0.06% of calcium nitrite, 0.05-0.1% of sodium silicate and 46.8-65% of water. The concrete anticorrosive airtight agent can obviously improve the capillary porosity structure of concrete, protect steel bars from being corroded by chloride ions, as well as increase the self-protection capability of the concrete.
Description
Technical field
The present invention relates to concrete admixture application, and in particular to a kind of antiseptic concrete air-tight agent and its preparation side
Method.
Background technology
Endurance performance of concrete is the important judgment criteria of modern high performance green concrete, and endurance performance of concrete is referred to
It is exposed in natural environment, and by expanding with heat and contract with cold after Frozen-thawed cycled, especially water or other corrosive mediums are penetrated in concrete
When, the technical indicators such as its crack resistance, the steel protection property, corrosion resistance, frost resistance, impermeability, alkali resistant aggregate reaction are produced various
Affect, so as to destroy concrete performance, the service life of concrete is greatly shortened.Antiseptic concrete air-tight agent is that one kind can be carried
The concrete admixture of high concrete endurance quality, can guarantee that concrete has sufficient hydrated cementitious, prevent plastic shrinkage and table
Layer dehydration crackle, can improve early strength and air-tightness, the anti-wear performance and acid resistance of surface layer more than 20%.Publication number CN
1982254 disclose a kind of antiseptic concrete air-tight agent composition and preparation method thereof, and the method is with plasticiser, inorganic silicon, has
Machine silicon, aluminium sulfate, nitrate, activating agent, water-loss reducer are prepared from for primary raw material, with diminishing, bleed, waterproof, it is impervious,
Freeze proof, cracking resistance, closely knit, plasticization, it is possible to increase concrete from protective capacities.
The content of the invention
The invention aims to improve the deficiencies in the prior art and a kind of antiseptic concrete air-tight agent is provided, the present invention
The preparation method of above-mentioned antiseptic concrete air-tight agent is also purposefully to provide, is used in concrete field, using airtight dose of anti-corrosion
The capillary channel in concrete is reduced, the corrosion to concrete and reinforcing bar such as villaumite, sulfate, ammonium salt is prevented or alleviate, is made
Concrete life extends.
The technical scheme is that：A kind of antiseptic concrete air-tight agent, it is characterised in that its raw material components and each component
The mass percent for accounting for raw material total amount is respectively：
It is preferred that above-mentioned polycarboxylate high performance water-reducing agent is methyl allyl polyoxyethylene ether-maleic anhydride molecule grafting
Polymer or methyl allyl polyoxyethylene ether-acroleic acid macromolecular graft polymers；The pH of polycarboxylate high performance water-reducing agent
For 7～8.
It is preferred that above-mentioned organosilan is hexadecyl trimethoxy silane, γ-methacryloxypropyl trimethoxy
At least one in base silane or isobutyl triethoxy silane；
It is preferred that above-mentioned polyacrylamide is non-ionic polyacrylamide, its molecular weight is 1,000,000～18,000,000.
It is preferred that above-mentioned defoamer is polypropylene glycerol aether or at least one in polyoxyethylene polyoxypropylene glycerin ether.
Present invention also offers the preparation method of above-mentioned antiseptic concrete air-tight agent, it is comprised the following steps that：First will
Polycarboxylate high performance water-reducing agent, organosilan are soluble in water, and temperature is maintained at 20～35 DEG C, are added dropwise simultaneously after stirring sub-
The aqueous solution of calcium nitrate aqueous solution and sodium metasilicate, adds polyacrylamide and defoamer, stirring after time for adding is complete within 5～10 hours
Afterwards natural cooling obtains a kind of antiseptic concrete air-tight agent.
Beneficial effect：
The present invention chooses organosilan, and unique silane group has the characteristics of surface tension is low, gas permeability is high, with
After the reaction of non-ionic polyacrylamide emulsifying agent, space net structure is formed, the bonding action of silane is effectively facilitated coagulation
Pore structure filling in soil-cement aquation is fine and close, reduces the capillary channel in concrete, prevents harmful ion from permeating so that mixed
Solidifying soil is added dropwise calcium nitrite and sodium silicate aqueous solution by the way that technique is added dropwise, and effectively promotes the distribution of system calcium silicon size, strengthens
Late strength of concrete develops, and calcium nitrite has resistance rust effect.The present invention is in solution shape, and with water-reduction, storage is steady
It is fixed, be not in lamination, preparation process is simple, raw material are environment friendly and pollution-free, and suitable large-scale promotion is used.
Specific embodiment
Example 1
Methyl allyl polyoxyethylene ether-maleic anhydride molecule graft polymers polycarboxylic acid series high-performance that pH is 7 is subtracted
Aqua 200g, hexadecyl trimethoxy silane 150g are dissolved in 400.5g water, and temperature is maintained at 25 DEG C, after stirring simultaneously
The aqueous solution of 0.5g calcium nitrites and the 120g aqueous solution, 1g sodium metasilicate and 127g is added dropwise, after time for adding is complete within 6 hours 0.2g is added
Non-ionic polyacrylamide (molecular weight is 1,000,000) and 0.8g polypropylene glycerol aethers, natural cooling is obtained final product after stirring 30 minutes
To a kind of antiseptic concrete air-tight agent.
Example 2
By methyl allyl polyoxyethylene ether-maleic anhydride molecule graft polymers polycarboxylic acid series high-performance that pH is 7.5
Water reducer 250g, γ-methacryloxypropyl trimethoxy silane 100g is dissolved in 348.5g water, and temperature is maintained at 30
DEG C, while the aqueous solution of 0.4g calcium nitrites and the 100g aqueous solution, 0.5g sodium metasilicate and 100g is added dropwise after stirring, 5 hours
Add 0.1g non-ionic polyacrylamides (molecular weight is 18,000,000) and 0.5g polyoxyethylene polyoxypropylenes sweet after time for adding is complete
Oily ether, natural cooling obtains a kind of antiseptic concrete air-tight agent after stirring 10 minutes.
Example 3
Methyl allyl polyoxyethylene ether-acroleic acid macromolecular graft polymers polycarboxylic acid series high-performance that pH is 8 is subtracted
Aqua 300g, isobutyl triethoxy silane 120g are dissolved in 478.3g water, and temperature is maintained at 20 DEG C, are dripped simultaneously after stirring
Plus the aqueous solution of 0.4g calcium nitrites and the 50g aqueous solution, 0.8g sodium metasilicate and 50g, add 0.3g non-after time for adding is complete within 7 hours
Cationic polyacrylamide (molecular weight is 3,000,000) and 0.2g polyoxyethylene polyoxypropylene glycerin ethers, it is naturally cold after stirring 25 minutes
But a kind of antiseptic concrete air-tight agent is obtained.
Example 4
Methyl allyl polyoxyethylene ether-acroleic acid macromolecular graft polymers polycarboxylic acid series high-performance that pH is 8 is subtracted
Aqua 380g, isobutyl triethoxy silane 150g are dissolved in 268.45g water, and temperature is maintained at 35 DEG C, after stirring simultaneously
The aqueous solution of 0.45g calcium nitrites and the 100g aqueous solution, 0.5g sodium metasilicate and 100g is added dropwise, is added after time for adding is complete within 8 hours
0.2g non-ionic polyacrylamides and 0.4g polyoxyethylene polyoxypropylene glycerin ethers, natural cooling obtains one after stirring 20 minutes
Plant antiseptic concrete air-tight agent.
Example 5
Methyl allyl polyoxyethylene ether-maleic anhydride molecule graft polymers polycarboxylic acid series high-performance that pH is 8 is subtracted
Aqua 200g, hexadecyl trimethoxy silane 150g are dissolved in 347.8g water, and temperature is maintained at 20 DEG C, after stirring simultaneously
The aqueous solution of 0.6g calcium nitrites and the 200g aqueous solution, 0.5g sodium metasilicate and 100g is added dropwise, is added after time for adding is complete within 5 hours
0.3g non-ionic polyacrylamides (molecular weight is 10,000,000) and 0.8g polyoxyethylene polyoxypropylene glycerin ethers, after stirring 15 minutes
Natural cooling obtains a kind of antiseptic concrete air-tight agent.
Using product foundation of the present invention《Railway concrete durability design of structure temporary provisions》、TB10120-2002、
J160-2002《Super-long railway tunnel technical specification》Standard performs technical indicator and reaches requirement.
Table one mixes present example and is prepared into airtight dose of anti-corrosion and is prepared into air tight concrete performance indications
Can be seen that from upper table testing result and mix airtight dose of anti-corrosion of the present invention and be prepared into airtightness concrete indices
It is excellent, airtight dose of (comparative example) excellent performance of more common anti-corrosion.
Claims (6)
1. a kind of antiseptic concrete air-tight agent, it is characterised in that its raw material components and each component account for the mass percent of raw material total amount
Respectively：
2. antiseptic concrete air-tight agent according to claim 1, it is characterised in that described polycarboxylic acid series high-performance diminishing
Agent is methyl allyl polyoxyethylene ether-maleic anhydride molecule graft polymers or methyl allyl polyoxyethylene ether-acrylic acid
Macromolecular grafted polymer；The pH of polycarboxylate high performance water-reducing agent is 7～8.
3. antiseptic concrete air-tight agent according to claim 1, it is characterised in that described organosilan is cetyl
In trimethoxy silane, γ-methacryloxypropyl trimethoxy silane or isobutyl triethoxy silane at least one
Kind.
4. antiseptic concrete air-tight agent according to claim 1, it is characterised in that described polyacrylamide is nonionic
Type polyacrylamide, its molecular weight is 1,000,000～18,000,000.
5. antiseptic concrete air-tight agent according to claim 1, it is characterised in that described defoamer is that polyoxypropylene is sweet
At least one in oily ether or polyoxyethylene polyoxypropylene glycerin ether.
6. a kind of method for preparing antiseptic concrete air-tight agent as claimed in claim 1, it is comprised the following steps that：First will be poly-
Carboxylic acid series high-performance dehydragent, organosilan are soluble in water, and temperature is maintained at 20～35 DEG C, and nitrous is added dropwise after stirring simultaneously
The aqueous solution of the sour calcium aqueous solution and sodium metasilicate, adds polyacrylamide and defoamer, after stirring after time for adding is complete within 5～10 hours
Natural cooling obtains a kind of antiseptic concrete air-tight agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611041588.0A CN106587713A (en) | 2016-11-24 | 2016-11-24 | Concrete anticorrosive airtight agent and preparation method thereof |
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|---|---|---|---|
| CN201611041588.0A CN106587713A (en) | 2016-11-24 | 2016-11-24 | Concrete anticorrosive airtight agent and preparation method thereof |
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| CN106587713A true CN106587713A (en) | 2017-04-26 |
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| CN201611041588.0A Pending CN106587713A (en) | 2016-11-24 | 2016-11-24 | Concrete anticorrosive airtight agent and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940744A (en) * | 2019-04-24 | 2019-06-28 | 刘翠芬 | A kind of Concrete Surface Durability elevator and preparation method thereof and application method |
| CN113929395A (en) * | 2021-10-29 | 2022-01-14 | 四川华西绿舍建材有限公司 | Environment-friendly high-performance air-tight concrete and preparation method thereof |
| CN114105520A (en) * | 2021-12-08 | 2022-03-01 | 山西科腾环保新材料股份有限公司 | Compound concrete external water aqua preservative |
| CN115594436A (en) * | 2022-02-23 | 2023-01-13 | 贵州天威建材科技有限责任公司（Cn） | Chlorine-free concrete air sealing agent and preparation method thereof |
| CN115893931A (en) * | 2022-10-18 | 2023-04-04 | 贵州天威建材科技有限责任公司 | High-early-strength low-permeability-coefficient gas tunnel concrete and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940744A (en) * | 2019-04-24 | 2019-06-28 | 刘翠芬 | A kind of Concrete Surface Durability elevator and preparation method thereof and application method |
| CN113929395A (en) * | 2021-10-29 | 2022-01-14 | 四川华西绿舍建材有限公司 | Environment-friendly high-performance air-tight concrete and preparation method thereof |
| CN113929395B (en) * | 2021-10-29 | 2022-09-09 | 四川华西绿舍建材有限公司 | Environment-friendly high-performance air-tight concrete and preparation method thereof |
| CN114105520A (en) * | 2021-12-08 | 2022-03-01 | 山西科腾环保新材料股份有限公司 | Compound concrete external water aqua preservative |
| CN115594436A (en) * | 2022-02-23 | 2023-01-13 | 贵州天威建材科技有限责任公司（Cn） | Chlorine-free concrete air sealing agent and preparation method thereof |
| CN115594436B (en) * | 2022-02-23 | 2023-11-03 | 贵州天威建材科技有限责任公司 | Chlorine-free concrete air-tight agent and preparation method thereof |
| CN115893931A (en) * | 2022-10-18 | 2023-04-04 | 贵州天威建材科技有限责任公司 | High-early-strength low-permeability-coefficient gas tunnel concrete and preparation method thereof |
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Application publication date: 20170426 |