CN111116079B - Bentonite anti-permeability and anti-salt corrosion concrete additive - Google Patents
Bentonite anti-permeability and anti-salt corrosion concrete additive Download PDFInfo
- Publication number
- CN111116079B CN111116079B CN201911392238.2A CN201911392238A CN111116079B CN 111116079 B CN111116079 B CN 111116079B CN 201911392238 A CN201911392238 A CN 201911392238A CN 111116079 B CN111116079 B CN 111116079B
- Authority
- CN
- China
- Prior art keywords
- powder
- additive
- parts
- bentonite
- concrete
- 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.)
- Active
Links
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
- C04B40/0042—Powdery mixtures
-
- 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
-
- 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
- C04B2103/65—Water proofers or repellants
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 relates to a bentonite anti-permeability and anti-salt corrosion concrete additive, which comprises a bentonite mixture, silicate, activated carbon powder, expanding agent powder and calcium chloride powder. According to the invention, a small amount of natural bleaching earth powder is added into the sodium-based montmorillonite powder, and the bentonite mixture is formed after mixing, and the natural bleaching earth with high adsorbability is added on the basis of the sodium-based montmorillonite, so that the water absorbability of the whole bentonite mixture is improved, and the performance of the additive is further improved.
Description
Technical Field
The invention belongs to the technical field of concrete additives, and particularly relates to a bentonite concrete additive with impermeability and salt corrosion resistance.
Background
The concrete additive, namely the concrete admixture, is a chemical substance which is added in the process of stirring the concrete, accounts for less than 5 percent of the mass of the cement and can obviously improve the performance of the concrete. The concrete admixture has the characteristics of multiple varieties, small mixing amount, great influence on the performance of concrete, low investment, quick response and obvious technical and economic benefits. With the continuous progress of scientific technology, the additive has been used more and more, and the additive has become the 5 th important component of concrete besides 4 basic components.
The bentonite is a non-metal mineral product with montmorillonite as a main mineral component, and the montmorillonite structure is 2: the crystal structure of the type 1 has better ion exchange performance because certain cations, such as Cu, Mg, Na, K and the like, exist in a layered structure formed by montmorillonite unit cells, and the cations have unstable effects with the montmorillonite unit cells and are easy to exchange with other cations. Foreign countries have been applied to more than 100 departments in 24 fields of industrial and agricultural production, and more than 300 products exist, so that the soil is called as 'universal soil'.
Therefore, how to add the beneficial functions of bentonite into concrete has certain beneficial effects on the impermeability and salt corrosion resistance of concrete is the focus of current research.
Disclosure of Invention
The invention aims to solve the problems and provide a bentonite concrete additive with impermeability and salt corrosion resistance, which has a simple structure and reasonable design.
The invention realizes the purpose through the following technical scheme:
an impervious salt corrosion-resistant bentonite concrete additive is prepared from bentonite mixture, silicate, activated carbon powder and expanding agent powder.
As a further optimization of the present invention, the additive further comprises calcium chloride powder.
As a further optimization scheme of the invention, the bentonite mixture comprises sodium-based montmorillonite powder and natural bleaching earth powder, and the mixing ratio of the sodium-based montmorillonite powder to the natural bleaching earth powder is 5:1 by mass ratio.
As a further preferred embodiment of the present invention, the expanding agent powder is iron powder.
As a further optimization scheme of the invention, the additive comprises 80-100 parts of sodium-based montmorillonite powder, 15-20 parts of natural bleaching earth powder, 5-10 parts of silicate, 1-5 parts of activated carbon powder, 1-2 parts of expanding agent powder and 1-5 parts of calcium chloride powder in parts by weight.
A method for preparing the bentonite concrete additive for resisting permeability and salt corrosion comprises the following steps:
step S1: sodium-based montmorillonite powder and natural bleaching earth powder are crushed to 60-70 mu m and are stirred and mixed uniformly according to the proportion;
step S2: adding activated carbon powder and silicate into the mixed powder of the step S1, and further uniformly stirring;
step S3: and adding the expanding agent and the calcium chloride powder into the mixed powder in the step S2, and stirring and mixing uniformly to finally obtain the additive.
The invention has the beneficial effects that:
1) according to the invention, a small amount of natural bleaching earth powder is added into the sodium-based montmorillonite powder, and the bentonite mixture is formed after mixing, and the natural bleaching earth with high adsorbability is added on the basis of the sodium-based montmorillonite, so that the water absorption of the whole bentonite mixture is favorably improved, and the performance of the additive is improved;
2) according to the invention, a small amount of silicate is added into the additive, and the silicate can enable the concrete to have sulfate corrosion resistance;
3) according to the invention, the swelling agent is added into the additive, and the swelling agent and the bentonite mixture are mutually synergistic, so that in a cement concrete medium environment, the interlayer adsorption exchange activity is enhanced, the compatibility of cement hydrated minerals is improved, the concrete strength is improved, and the salt corrosion resistance of the concrete can be further enhanced;
4) according to the invention, a small amount of calcium chloride powder is added into the additive, so that the hardening of concrete can be accelerated, the cold resistance of building mortar can be increased, the building antifreezing agent is an excellent building antifreezing agent, the concrete can have anti-permeability, and the performance of the concrete can be improved under the condition that other additives are not suitable;
5) the method is simple, high in stability, reasonable in design and convenient to implement.
Detailed Description
The present application is described in further detail below, and it should be noted that the following detailed description is provided for illustrative purposes only, and is not intended to limit the scope of the present application, which is defined by the appended claims.
Example 1
The preparation method of the bentonite concrete additive for resisting permeability and salt corrosion comprises the following steps:
step S1: according to the weight portion, 80-100 portions of sodium-based montmorillonite powder and 15-20 portions of natural bleaching earth powder are crushed to 60-70 μm, and are stirred and mixed uniformly according to the proportion of 5: 1;
step S2: adding 1-5 parts of activated carbon powder and 5-10 parts of silicate into the mixed powder obtained in the step S1, and further uniformly stirring;
step S3: and (4) adding 1-2 parts of iron powder expanding agent and 1-5 parts of calcium chloride powder into the mixed powder obtained in the step S2, and stirring and uniformly mixing to finally obtain the additive.
Example 2
The preparation method of the bentonite concrete additive for resisting permeability and salt corrosion comprises the following steps:
step S1: according to the weight portion, 80 portions of sodium-based montmorillonite powder and 16 portions of natural bleaching earth powder are crushed to 60 mu m, and are stirred and mixed uniformly according to the proportion of 5: 1;
step S2: adding 1 part of activated carbon powder and 5 parts of silicate into the mixed powder of the step S1, and further uniformly stirring;
step S3: and (4) adding 1 part of iron powder expanding agent and 1 part of calcium chloride powder into the mixed powder of the step S2, and stirring and mixing uniformly to finally obtain the additive.
Example 3
The preparation method of the bentonite concrete additive for resisting permeability and salt corrosion comprises the following steps:
step S1: according to the weight portion, 90 portions of sodium-based montmorillonite powder and 18 portions of natural bleaching earth powder are crushed to 65 μm and are stirred and mixed uniformly according to the proportion of 5: 1;
step S2: adding 3 parts of activated carbon powder and 7 parts of silicate to the mixed powder of step S1, and further uniformly stirring;
step S3: and (3) adding 2 parts of iron powder expanding agent and 3 parts of calcium chloride powder into the mixed powder of the step S2, and stirring and mixing uniformly to finally obtain the additive.
Example 4
The preparation method of the bentonite concrete additive for resisting permeability and salt corrosion comprises the following steps:
step S1: according to the weight portion, 100 portions of sodium-based montmorillonite powder and 20 portions of natural bleaching earth powder are crushed to 70 μm and are stirred and mixed uniformly according to the proportion of 5: 1;
step S2: adding 5 parts of activated carbon powder and 10 parts of silicate to the mixed powder of the step S1, and further uniformly stirring;
step S3: and (4) adding 2 parts of iron powder expanding agent and 5 parts of calcium chloride powder into the mixed powder of the step S2, and stirring and mixing uniformly to finally obtain the additive.
Comparative example 1
The preparation method of the concrete additive comprises the following steps:
step S1: according to the weight portion, 100 portions of sodium-based montmorillonite powder are crushed to 60-70 μm and are evenly stirred;
step S2: adding 5 parts of activated carbon powder and 10 parts of silicate to the powder of step S1, and further uniformly stirring;
step S3: and (4) adding 2 parts of iron powder expanding agent and 5 parts of calcium chloride powder into the mixed powder of the step S2, and stirring and mixing uniformly to finally obtain the additive.
Comparative example 2
The preparation method of the concrete additive comprises the following steps:
step S1: according to the weight portion, 100 portions of sodium-based montmorillonite powder and 20 portions of natural bleaching earth powder are crushed to 70 μm and are stirred and mixed uniformly according to the proportion of 5: 1;
step S2: adding 5 parts of activated carbon powder to the mixed powder of step S1, and further stirring uniformly;
step S3: and (4) adding 2 parts of iron powder expanding agent and 5 parts of calcium chloride powder into the mixed powder of the step S2, and stirring and mixing uniformly to finally obtain the additive.
Comparative example 3
The preparation method of the concrete additive comprises the following steps:
step S1: according to the weight portion, 100 portions of sodium-based montmorillonite powder and 15 to 20 portions of natural bleaching earth powder are crushed to 60 to 70 mu m, and are stirred and mixed uniformly according to the proportion of 5: 1;
step S2: adding 1-5 parts of activated carbon powder and 5-10 parts of silicate into the mixed powder obtained in the step S1, and further uniformly stirring;
step S3: and (4) adding 1-5 parts of calcium chloride powder into the mixed powder obtained in the step S2, and uniformly stirring and mixing to finally obtain the additive.
Test 1: detection of impermeability of concrete prepared by using the additive
The additives obtained in the examples and the comparative examples were used in the preparation of concrete, and corresponding concrete samples were obtained, and the permeation parameters of each concrete sample were measured by the normal head method, respectively, and are shown in the following table:
| test specimen | Penetration parameter |
| Example 4 | 0.8 |
| Comparative example 1 | 0.7 |
| Comparative example 2 | 0.6 |
| Comparative example 3 | 0.6 |
The results in the table show that the natural bleaching earth and silicate added into the concrete additive can effectively improve the anti-permeability of the concrete.
Test 2: the salt corrosion resistance of the additive is tested
The additives obtained in examples and comparative examples were added to concrete to prepare concrete samples, and the average strength after 3 days, the breaking strength, and the average strength and the holding strength after 28 days of each concrete sample were measured, and the results are shown in the following table:
the results in the table show that the strength of the concrete can be effectively improved by adding the expanding agent, the silicate and the natural bleaching earth into the additive, and the salt corrosion resistance of the concrete is further improved.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (2)
1. The bentonite concrete additive for resisting permeability and salt corrosion comprises a bentonite mixture and silicate, and is characterized in that: the additive also comprises activated carbon powder and expanding agent powder; the additive also comprises calcium chloride powder; the bentonite mixture comprises sodium-based montmorillonite powder and natural bleaching earth powder, and the mixing ratio of the sodium-based montmorillonite powder to the natural bleaching earth powder is 5:1 by mass; the expanding agent powder is iron powder; the additive comprises, by weight, 80-100 parts of sodium-based montmorillonite powder, 15-20 parts of natural bleaching earth powder, 5-10 parts of silicate, 1-5 parts of activated carbon powder, 1-2 parts of expanding agent powder and 1-5 parts of calcium chloride powder.
2. A method for preparing the bentonite concrete additive for resisting permeability and salt corrosion according to claim 1, which comprises the following steps:
step S1: sodium-based montmorillonite powder and natural bleaching earth powder are crushed to 60-70 mu m and are stirred and mixed uniformly according to the proportion;
step S2: adding activated carbon powder and silicate into the mixed powder of the step S1, and further uniformly stirring;
step S3: and adding the expanding agent and the calcium chloride powder into the mixed powder in the step S2, and stirring and mixing uniformly to finally obtain the additive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911392238.2A CN111116079B (en) | 2019-12-30 | 2019-12-30 | Bentonite anti-permeability and anti-salt corrosion concrete additive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911392238.2A CN111116079B (en) | 2019-12-30 | 2019-12-30 | Bentonite anti-permeability and anti-salt corrosion concrete additive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111116079A CN111116079A (en) | 2020-05-08 |
| CN111116079B true CN111116079B (en) | 2022-01-25 |
Family
ID=70504858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911392238.2A Active CN111116079B (en) | 2019-12-30 | 2019-12-30 | Bentonite anti-permeability and anti-salt corrosion concrete additive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111116079B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103524067A (en) * | 2013-09-18 | 2014-01-22 | 尹无忌 | Bentonite anti-seepage and anti-salt corrosion cement concrete additive |
| CN105084798A (en) * | 2015-08-04 | 2015-11-25 | 河海大学 | Concrete sulfate-corrosion-resistant additive and preparation method thereof |
| CN105271891A (en) * | 2015-11-24 | 2016-01-27 | 王晓伟 | Bentonite impervious salt-corrosion-resistant cement concrete additive |
| CN109437649A (en) * | 2018-12-29 | 2019-03-08 | 浙江广厦建设职业技术学院 | A kind of preservative of Concrete Resist Reinforcing Sulfate Corrosion and preparation method thereof |
-
2019
- 2019-12-30 CN CN201911392238.2A patent/CN111116079B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103524067A (en) * | 2013-09-18 | 2014-01-22 | 尹无忌 | Bentonite anti-seepage and anti-salt corrosion cement concrete additive |
| CN105084798A (en) * | 2015-08-04 | 2015-11-25 | 河海大学 | Concrete sulfate-corrosion-resistant additive and preparation method thereof |
| CN105271891A (en) * | 2015-11-24 | 2016-01-27 | 王晓伟 | Bentonite impervious salt-corrosion-resistant cement concrete additive |
| CN109437649A (en) * | 2018-12-29 | 2019-03-08 | 浙江广厦建设职业技术学院 | A kind of preservative of Concrete Resist Reinforcing Sulfate Corrosion and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 掺膨胀剂混凝土抗硫酸盐侵蚀性能研究;王伟等;《水利与建筑工程学报》;20080930;第6卷(第3期);第118页右栏第4段 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111116079A (en) | 2020-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105347726B (en) | A kind of anti-corrosion high-thin arch dam polycarboxylate composite water reducing agent and preparation method and application | |
| CN104860575B (en) | The Concrete synergist and its production technology of resisting corrosion of chlorine ion | |
| CN110627391B (en) | High-activity anhydrous phosphogypsum cementing material and preparation method thereof | |
| CN103708756B (en) | A kind of later stage remarkable enhanced cement grinding aid and preparation method thereof | |
| CN106978184B (en) | Curing agent for composite heavy metal polluted soil and preparation and application methods thereof | |
| CN112047679B (en) | Recycled concrete and preparation method thereof | |
| CN104402350B (en) | Earth building material modification method and the method that building block is prepared using the modified raw-soil | |
| CN110330289A (en) | A kind of soil-solidified-agent, soil solidification soil and preparation method thereof | |
| CN107089807B (en) | Pervious concrete gel and preparation method thereof | |
| CN103482899A (en) | Channel grouting agent and manufacturing method thereof | |
| CN107974254A (en) | A kind of acid soil conditioning agent | |
| CN105924026A (en) | Anti-mud small material for compounding of polycarboxylate superplasticizer and application method thereof | |
| CN107010911B (en) | Curing agent suitable for strong-acid compound heavy metal polluted soil and preparation and use methods thereof | |
| CN104926176A (en) | Reinforcing composition for pumping aid, reinforcing pumping aid as well as preparation method and application thereof | |
| CN111116079B (en) | Bentonite anti-permeability and anti-salt corrosion concrete additive | |
| CN105130307A (en) | Method for preparing high-fluidity silica mortar | |
| CN109320144A (en) | A kind of microorganism self-repair concrete and preparation method thereof | |
| CN105198344A (en) | Vinylon fiber-reinforcement cement slab containing diatomite material and preparation method thereof | |
| CN105622028B (en) | A kind of compound porous sewage treating material of organic-inorganic and preparation method thereof | |
| WO2019076449A1 (en) | Method to design a self-healing concrete additionated with a permeable concrete containing biological materials | |
| CN110606792A (en) | Preparation method of soil conditioner based on paper mill sludge and vermiculite powder | |
| CN111018424A (en) | Corrosion-resistant high-strength concrete and preparation method thereof | |
| CN111153673A (en) | Fireproof door core plate | |
| CN102173687A (en) | Sulfate-corrosion-resistance concrete additive and preparation method thereof | |
| CN111205012B (en) | Concrete accelerator taking waste aluminum ring-pull cans as raw materials and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |