CN112390565A - Concrete expanding agent and preparation method thereof - Google Patents
Concrete expanding agent and preparation method thereof Download PDFInfo
- Publication number
- CN112390565A CN112390565A CN202011385057.XA CN202011385057A CN112390565A CN 112390565 A CN112390565 A CN 112390565A CN 202011385057 A CN202011385057 A CN 202011385057A CN 112390565 A CN112390565 A CN 112390565A
- Authority
- CN
- China
- Prior art keywords
- parts
- water
- agent
- lignin
- 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.)
- Pending
Links
Images
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
Abstract
The invention specifically discloses a concrete expanding agent which comprises the following raw materials in parts by weight: 20-30 parts of sinking bead, 10-20 parts of natural polymer cellulose, 10-20 parts of lignin, 2-6 parts of water-absorbent resin, 12-18 parts of elastic aggregate, 3-7 parts of dispersible activator, 0.2-0.6 part of water reducer, 5-11 parts of latex, 2-8 parts of water-soluble resin, 0.4-1 part of dispersing agent, 0.4-0.8 part of defoaming agent, 4-10 parts of aluminum sulfate, 12-24 parts of calcium oxide, 0.4-1 part of hydroxy acid salt, 1-5 parts of powdered asphalt, 2-6 parts of retarder and a proper amount of water. According to the invention, by adding the modified lignin and the natural polymer cellulose, the cracking risk caused by concrete shrinkage can be reduced to a higher degree, and the problems of pollution, difficulty in treatment, occupation of land and emotional opposition among public governments brought by straws are relieved.
Description
Technical Field
The invention relates to the technical field of concrete and mortar, in particular to a concrete expanding agent and a preparation method thereof.
Background
The concrete expanding agent is used for preparing expansion concrete (including compensation shrinkage concrete and self-stress concrete), the compensation shrinkage concrete has the effects of compensating concrete drying and compacting concrete and improving the impermeability of the concrete, and is mainly used for two aspects of water resistance and crack resistance in civil engineering.
The concrete is subjected to volume reduction in the early stage of setting or in the hardening process, shrinkage stress is generated in the structure, when the shrinkage stress exceeds the tensile strength of the concrete, the concrete is cracked to form shrinkage cracks, and a concrete expanding agent is usually doped into the concrete to prevent and relieve the temperature shrinkage cracks of an ultralong concrete structure.
Disclosure of Invention
In view of the above, the present invention provides a concrete expanding agent and a preparation method thereof, which can significantly improve the bonding strength between concrete and the expanding agent, fully exert the reinforcing effect of the expanding agent on the concrete, and improve the action time limit of the leg concrete by enhancing the corrosion resistance of the expanding agent.
In order to solve the technical problems, the invention provides the technical scheme that,
a concrete expanding agent comprises the following raw materials in parts by weight:
20-30 parts of sinking bead, 10-20 parts of natural polymer cellulose, 10-20 parts of lignin, 2-6 parts of water-absorbent resin, 12-18 parts of elastic aggregate, 3-7 parts of dispersible activator, 0.2-0.6 part of water reducer, 5-11 parts of latex, 2-8 parts of water-soluble resin, 0.4-1 part of dispersing agent, 0.4-0.8 part of defoaming agent, 4-10 parts of aluminum sulfate, 12-24 parts of calcium oxide, 0.4-1 part of hydroxy acid salt, 1-5 parts of powdered asphalt, 2-6 parts of retarder and a proper amount of water.
Preferably, the feed comprises the following raw materials in parts by weight: 24-26 parts of precipitated beads, 14-16 parts of natural polymer cellulose, 14-16 parts of lignin, 3-5 parts of water-absorbent resin, 14-16 parts of elastic aggregate, 4-6 parts of dispersible activator, 0.6-0.8 part of water reducer, 7-9 parts of latex, 4-6 parts of water-soluble resin, 0.6-0.8 part of dispersing agent, 0.5-0.7 part of defoaming agent, 6-8 parts of aluminum sulfate, 17-19 parts of calcium oxide, 0.6-0.8 part of hydroxy acid salt, 2-4 parts of powdered asphalt, 3-5 parts of retarder and a proper amount of water.
Preferably, the feed comprises the following raw materials in parts by weight: 25 parts of heavy bead, 15 parts of natural polymer cellulose, 15 parts of lignin, 4 parts of water-absorbent resin, 15 parts of elastic aggregate, 5 parts of dispersible activator, 0.7 part of water reducer, 8 parts of latex, 5 parts of water-soluble resin, 0.7 part of dispersant, 0.6 part of defoamer, 7 parts of aluminum sulfate, 18 parts of calcium oxide, 0.7 part of hydroxy-acid salt, 3 parts of powdered asphalt, 4 parts of retarder and a proper amount of water.
Preferably, the particle size of the elastic aggregate is in the range of 0.05-0.20 mm, and the elastic aggregate is one or more of rubber granules, silica gel granules and plastic granules.
Preferably, the water reducing agent is a polycarboxylic acid water reducing agent or a naphthalene water reducing agent of powder, and the dispersible active agent is one or a combination of more of calcium carbonate, sodium sulfate and zinc chloride.
Preferably, the water-soluble resin is one or a combination of a plurality of water-soluble urea-formaldehyde resin, water-soluble epoxy resin and water-soluble acrylic acid modified alkyd resin, the average particle size of the asphalt powder is less than or equal to 80 μm, and the asphalt powder is obtained by spray drying emulsified asphalt.
Preferably, the hydroxy-acid salt is one or a combination of zinc gluconate, sodium D-gluconate and potassium gluconate, and the retarder is one or a combination of sodium citrate and L-tartaric acid.
Preferably, the average particle size of the beads is about 1.2 μm, and the beads are obtained from soot generated from combustion in a fuel boiler.
The invention also discloses a preparation method of the concrete expanding agent, which is characterized by comprising the following steps:
step S1: dispersing the straws after impurity removal in a mixed solution of isopropanol and sodium hydroxide, putting the mixed solution into a water bath reaction kettle with a stirrer, heating in a water bath, stirring for reaction for 6-13 hours, and filtering to remove filter residues to obtain natural polymer cellulose and lignin alkali liquor;
step S2: neutralizing the obtained natural polymer cellulose and lignin alkali liquor to be neutral by using glacial acetic acid with the mass fraction of 95% in a slow dropwise adding mode to obtain a natural polymer cellulose and lignin suspension;
step S3: reacting natural high-molecular cellulose, lignin suspension and 3-chloro-2-hydroxypropyl trimethyl ammonium chloride in an alkaline solution, grafting 2-hydroxypropyl trimethyl ammonium chloride on molecular chains of the natural high-molecular cellulose and the lignin, then reacting with chloroacetic acid in an ethanol-water mixed solvent, and grafting acetic acid groups on the natural high-molecular cellulose and the lignin to form the natural high-molecular cellulose and the lignin modified into the amphoteric adsorbent of anions and cations;
step S4: adding the sinking beads, the water-absorbent resin, the elastic aggregate, the water-soluble resin, the aluminum sulfate, the calcium oxide, the hydroxyl hydroxy acid salt, the powdered asphalt, the natural polymer cellulose of the obtained amphoteric adsorbent and the lignin into ball-milling equipment, and milling to the required fineness;
step S5: adding a dispersible activator, a water reducing agent, latex, a dispersing agent, a defoaming agent and a retarder according to a proportion, uniformly mixing, and continuously grinding to 500m 2/kg;
step S6: and cooling the prepared expanding agent to room temperature, and then bagging and sealing for storage.
Preferably, the grinding device is an electromagnetic magnetic vibration mill, a planetary ball mill or a continuous powder surface modifying machine.
Compared with the prior art, the invention has the following advantages:
(1) according to the invention, the modified lignin and the natural polymer cellulose are added, so that the modified lignin has the characteristics of a cationic adsorbent and an anionic adsorbent, and the natural polymer cellulose, the lignin and other natural polymer molecular chains have a large amount of active groups such as hydroxyl groups, so that the expanding agent and the concrete have good adsorption and complexation properties, thereby reducing the cracking risk caused by concrete shrinkage to a higher degree, relieving the problems of pollution, difficult treatment, occupation of land and emotional opposition among public governments caused by straws, being an environment-friendly, economic, safe, high in filling strength and low in cost technology, and having the effect of turning waste into wealth;
(2) according to the invention, by adding the elastic aggregate and the dispersible activator, after the elastic aggregate is uniformly mixed with other ingredients, the dispersible activator can activate and promote the activity of the elastic aggregate and the latex to the maximum extent, so that the combination of the elastic aggregate and the latex with the interior of the concrete is more compact, the mechanical property and the durability of the concrete are enhanced, the acid corrosion resistance is improved, and the dispersible activator can be suitable for the environment with higher contents of acidic substances and other corrosive substances in the air caused by industrial pollution at present;
(3) according to the invention, by adding the latex and the water-soluble resin, the latex can form a network membrane substance in the concrete after being added and coat the network membrane substance on the surface of the concrete to isolate the corrosion of acidic substances such as CO2, H2S, CL2 and the like, while the water-soluble resin generates a chemical reaction when encountering acidic substances such as CO2, H2S, CL2 and the like, so that a more compact network structure membrane is formed at a corrosion interface, and the invasion of acidic substances such as CO2, H2S, CL2 and the like is effectively blocked;
(4) according to the invention, the added dispersing agent can reduce the consistency of the concrete expanding agent, improve the fluidity and improve the rheological property of the concrete expanding agent, the defoaming agent can eliminate micro bubbles in the concrete expanding agent by adding the defoaming agent, free acid radical ions contained in the hydroxyl acid salt compete with chloride ions for adsorption on the surface of a steel bar by the added hydroxyl acid salt, and finally a layer of compact adsorption film is formed on the surface of the steel bar by chelating action to protect the steel bar, so that the corrosion capability of the chloride ions and sulfate of the concrete can be further improved, and a good protection effect can be achieved on the interior of the concrete;
(5) according to the invention, the added water reducing agent is preferably a polycarboxylic acid water reducing agent, and has good compatibility with water-soluble resin and asphalt powder, so that the concrete expanding agent has good flowing property, the dispersion uniformity of the expanding agent in the concrete is ensured, the overall quality of the concrete is effectively improved, and the added water-soluble resin and the powder asphalt have good intersolubility with the concrete, so that the porosity in the concrete can be reduced, the concrete is more compact overall, weak links between interfaces in the concrete are enhanced, and the concrete has better corrosion resistance;
(6) the added sinking bead can be used as a material in the concrete expanding agent to fill the pores among cement particles in the process of combining with concrete, so that free water is automatically released, the fluidity of the concrete is effectively improved, and the high activity of the micro-beads can improve the strength of the concrete after hardening.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a comparison of the structure of the performance test of examples 2 to 4 of the present invention and comparative examples 1 to 2.
The concrete expanding agent comprises the following raw material components: 1. sinking beads; 2. natural polymer cellulose; 3. lignin; 4. a water-absorbent resin; 5. an elastic aggregate; 6. a dispersible activator; 7. a water reducing agent; 8. latex; 9. a water-soluble resin; 10. a dispersant; 11. defoaming agents; 12. aluminum sulfate; 13. calcium oxide; 14. a hydroxy acid salt; 15. powder asphalt; 16. a retarder.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Example 1
The concrete expanding agent is characterized by comprising the following raw materials in parts by weight:
20-30 parts of sinking bead, 10-20 parts of natural polymer cellulose, 10-20 parts of lignin, 2-6 parts of water-absorbent resin, 12-18 parts of elastic aggregate, 3-7 parts of dispersible activator, 0.2-0.6 part of water reducer, 5-11 parts of latex, 2-8 parts of water-soluble resin, 0.4-1 part of dispersing agent, 0.4-0.8 part of defoaming agent, 4-10 parts of aluminum sulfate, 12-24 parts of calcium oxide, 0.4-1 part of hydroxy acid salt, 1-5 parts of powdered asphalt, 2-6 parts of retarder and a proper amount of water.
Further explained, the feed comprises the following raw materials in parts by weight: 24-26 parts of precipitated beads, 14-16 parts of natural polymer cellulose, 14-16 parts of lignin, 3-5 parts of water-absorbent resin, 14-16 parts of elastic aggregate, 4-6 parts of dispersible activator, 0.6-0.8 part of water reducer, 7-9 parts of latex, 4-6 parts of water-soluble resin, 0.6-0.8 part of dispersing agent, 0.5-0.7 part of defoaming agent, 6-8 parts of aluminum sulfate, 17-19 parts of calcium oxide, 0.6-0.8 part of hydroxy acid salt, 2-4 parts of powdered asphalt, 3-5 parts of retarder and a proper amount of water.
Further explained, the feed comprises the following raw materials in parts by weight: 25 parts of heavy bead, 15 parts of natural polymer cellulose, 15 parts of lignin, 4 parts of water-absorbent resin, 15 parts of elastic aggregate, 5 parts of dispersible activator, 0.7 part of water reducer, 8 parts of latex, 5 parts of water-soluble resin, 0.7 part of dispersant, 0.6 part of defoamer, 7 parts of aluminum sulfate, 18 parts of calcium oxide, 0.7 part of hydroxy-acid salt, 3 parts of powdered asphalt, 4 parts of retarder and a proper amount of water.
It is further noted that the particle size of the elastic aggregate is in the range of 0.05-0.20 mm, and the elastic aggregate is one or a combination of more of rubber particles, silica gel particles and plastic particles.
It is further explained that the water reducing agent is a polycarboxylic acid water reducing agent or a naphthalene water reducing agent of powder, and the dispersible active agent is one or a combination of more of calcium carbonate, sodium sulfate and zinc chloride.
It is further explained that the water-soluble resin is one or a combination of a plurality of water-soluble urea-formaldehyde resin, water-soluble epoxy resin and water-soluble acrylic acid modified alkyd resin, the average grain diameter of the asphalt powder is less than or equal to 80 μm, and the asphalt powder is obtained by spray drying the emulsified asphalt.
It is further explained that the hydroxy-acid salt is one or a combination of more of zinc gluconate, D-sodium gluconate and potassium gluconate, and the retarder is one or a combination of sodium citrate and L-tartaric acid.
It is further noted that the average particle diameter of the beads is about 1.2 μm, and the beads are obtained from soot generated by combustion in a fuel boiler.
Example 2
The embodiment discloses a preparation method of a concrete expanding agent, which is characterized by comprising the following steps:
the feed comprises the following raw materials in parts by weight: 25 parts of sinking beads, 15 parts of natural polymer cellulose, 15 parts of lignin, 4 parts of water-absorbent resin, 15 parts of elastic aggregate, 5 parts of dispersible activator, 0.7 part of water reducing agent, 8 parts of latex, 5 parts of water-soluble resin, 0.7 part of dispersing agent, 0.6 part of defoaming agent, 7 parts of aluminum sulfate, 18 parts of calcium oxide, 0.7 part of hydroxy-acid salt, 3 parts of powdered asphalt, 4 parts of retarder and a proper amount of water;
step S1: dispersing the straws after impurity removal in a mixed solution of isopropanol and sodium hydroxide, putting the mixed solution into a water bath reaction kettle with a stirrer, heating in a water bath, stirring for reaction for 6-13 hours, and filtering to remove filter residues to obtain natural polymer cellulose and lignin alkali liquor;
step S2: neutralizing the obtained natural polymer cellulose and lignin alkali liquor to be neutral by using glacial acetic acid with the mass fraction of 95% in a slow dropwise adding mode to obtain a natural polymer cellulose and lignin suspension;
step S3: reacting natural high-molecular cellulose, lignin suspension and 3-chloro-2-hydroxypropyl trimethyl ammonium chloride in an alkaline solution, grafting 2-hydroxypropyl trimethyl ammonium chloride on molecular chains of the natural high-molecular cellulose and the lignin, then reacting with chloroacetic acid in an ethanol-water mixed solvent, and grafting acetic acid groups on the natural high-molecular cellulose and the lignin to form the natural high-molecular cellulose and the lignin modified into the amphoteric adsorbent of anions and cations;
step S4: adding the sinking beads, the water-absorbent resin, the elastic aggregate, the water-soluble resin, the aluminum sulfate, the calcium oxide, the hydroxyl hydroxy acid salt, the powdered asphalt, the natural polymer cellulose of the obtained amphoteric adsorbent and the lignin into ball-milling equipment, and milling to the required fineness;
step S5: adding a dispersible activator, a water reducing agent, latex, a dispersing agent, a defoaming agent and a retarder according to a proportion, uniformly mixing, and continuously grinding to 500m 2/kg;
step S6: and cooling the prepared expanding agent to room temperature, and then bagging and sealing for storage.
It should be further noted that the grinding device is preferably an electromagnetic magnetic vibration mill, a planetary ball mill or a continuous powder surface modifying machine.
Example 3
The feed comprises the following raw materials in parts by weight: 24 parts of sinking beads, 14 parts of natural polymer cellulose, 14 parts of lignin, 3 parts of water-absorbent resin, 14 parts of elastic aggregate, 4 parts of dispersible activator, 0.6 part of water reducing agent, 7 parts of latex, 4 parts of water-soluble resin, 0.6 part of dispersing agent, 0.5 part of defoaming agent, 6 parts of aluminum sulfate, 17 parts of calcium oxide, 0.6 part of hydroxy-acid salt, 2 parts of powdered asphalt, 3 parts of retarder and a proper amount of water;
step S1: dispersing the straws after impurity removal in a mixed solution of isopropanol and sodium hydroxide, putting the mixed solution into a water bath reaction kettle with a stirrer, heating in a water bath, stirring for reaction for 6-13 hours, and filtering to remove filter residues to obtain natural polymer cellulose and lignin alkali liquor;
step S2: neutralizing the obtained natural polymer cellulose and lignin alkali liquor to be neutral by using glacial acetic acid with the mass fraction of 95% in a slow dropwise adding mode to obtain a natural polymer cellulose and lignin suspension;
step S3: reacting natural high-molecular cellulose, lignin suspension and 3-chloro-2-hydroxypropyl trimethyl ammonium chloride in an alkaline solution, grafting 2-hydroxypropyl trimethyl ammonium chloride on molecular chains of the natural high-molecular cellulose and the lignin, then reacting with chloroacetic acid in an ethanol-water mixed solvent, and grafting acetic acid groups on the natural high-molecular cellulose and the lignin to form the natural high-molecular cellulose and the lignin modified into the amphoteric adsorbent of anions and cations;
step S4: adding the sinking beads, the water-absorbent resin, the elastic aggregate, the water-soluble resin, the aluminum sulfate, the calcium oxide, the hydroxyl hydroxy acid salt, the powdered asphalt, the natural polymer cellulose of the obtained amphoteric adsorbent and the lignin into ball-milling equipment, and milling to the required fineness;
step S5: adding a dispersible activator, a water reducing agent, latex, a dispersing agent, a defoaming agent and a retarder according to a proportion, uniformly mixing, and continuously grinding to 500m 2/kg;
step S6: and cooling the prepared expanding agent to room temperature, and then bagging and sealing for storage.
It should be further noted that the grinding device is preferably an electromagnetic magnetic vibration mill, a planetary ball mill or a continuous powder surface modifying machine.
Example 4
The feed comprises the following raw materials in parts by weight: 26 parts of settled beads, 16 parts of natural polymer cellulose, 16 parts of lignin, 5 parts of water-absorbent resin, 16 parts of elastic aggregate, 6 parts of dispersible activator, 0.8 part of water reducing agent, 9 parts of latex, 6 parts of water-soluble resin, 0.8 part of dispersing agent, 0.7 part of defoaming agent, 8 parts of aluminum sulfate, 19 parts of calcium oxide, 0.8 part of hydroxy-acid salt, 4 parts of powdered asphalt, 5 parts of retarder and a proper amount of water;
step S1: dispersing the straws after impurity removal in a mixed solution of isopropanol and sodium hydroxide, putting the mixed solution into a water bath reaction kettle with a stirrer, heating in a water bath, stirring for reaction for 6-13 hours, and filtering to remove filter residues to obtain natural polymer cellulose and lignin alkali liquor;
step S2: neutralizing the obtained natural polymer cellulose and lignin alkali liquor to be neutral by using glacial acetic acid with the mass fraction of 95% in a slow dropwise adding mode to obtain a natural polymer cellulose and lignin suspension;
step S3: reacting natural high-molecular cellulose, lignin suspension and 3-chloro-2-hydroxypropyl trimethyl ammonium chloride in an alkaline solution, grafting 2-hydroxypropyl trimethyl ammonium chloride on molecular chains of the natural high-molecular cellulose and the lignin, then reacting with chloroacetic acid in an ethanol-water mixed solvent, and grafting acetic acid groups on the natural high-molecular cellulose and the lignin to form the natural high-molecular cellulose and the lignin modified into the amphoteric adsorbent of anions and cations;
step S4: adding the sinking beads, the water-absorbent resin, the elastic aggregate, the water-soluble resin, the aluminum sulfate, the calcium oxide, the hydroxyl hydroxy acid salt, the powdered asphalt, the natural polymer cellulose of the obtained amphoteric adsorbent and the lignin into ball-milling equipment, and milling to the required fineness;
step S5: adding a dispersible activator, a water reducing agent, latex, a dispersing agent, a defoaming agent and a retarder according to a proportion, uniformly mixing, and continuously grinding to 500m 2/kg;
step S6: and cooling the prepared expanding agent to room temperature, and then bagging and sealing for storage.
It should be further noted that the grinding device is preferably an electromagnetic magnetic vibration mill, a planetary ball mill or a continuous powder surface modifying machine.
Comparative example 1
The comparative example is substantially the same as example 2 except that the dispersible activator, the water reducing agent, the latex, the dispersant, the defoamer and the retarder are added in proportion, ground by a grinding device to be more than 500m2/kg, and prepared by the same method as example 2.
Comparative example 2
The comparative example is substantially the same as example 2 except that the dispersible activator, the water reducing agent, the latex, the dispersant, the defoamer and the retarder are added in proportion, ground by a grinding device to be less than 500m2/kg, and prepared by the same method as example 2.
Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement 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 concrete expanding agent is characterized by comprising the following raw materials in parts by weight:
20-30 parts of sinking bead, 10-20 parts of natural polymer cellulose, 10-20 parts of lignin, 2-6 parts of water-absorbent resin, 12-18 parts of elastic aggregate, 3-7 parts of dispersible activator, 0.2-0.6 part of water reducer, 5-11 parts of latex, 2-8 parts of water-soluble resin, 0.4-1 part of dispersing agent, 0.4-0.8 part of defoaming agent, 4-10 parts of aluminum sulfate, 12-24 parts of calcium oxide, 0.4-1 part of hydroxy acid salt, 1-5 parts of powdered asphalt, 2-6 parts of retarder and a proper amount of water.
2. The concrete expanding agent as claimed in claim 1, which comprises the following raw materials in parts by weight: 24-26 parts of precipitated beads, 14-16 parts of natural polymer cellulose, 14-16 parts of lignin, 3-5 parts of water-absorbent resin, 14-16 parts of elastic aggregate, 4-6 parts of dispersible activator, 0.6-0.8 part of water reducer, 7-9 parts of latex, 4-6 parts of water-soluble resin, 0.6-0.8 part of dispersing agent, 0.5-0.7 part of defoaming agent, 6-8 parts of aluminum sulfate, 17-19 parts of calcium oxide, 0.6-0.8 part of hydroxy acid salt, 2-4 parts of powdered asphalt, 3-5 parts of retarder and a proper amount of water.
3. The concrete expanding agent as claimed in claim 1, which comprises the following raw materials in parts by weight: 25 parts of heavy bead, 15 parts of natural polymer cellulose, 15 parts of lignin, 4 parts of water-absorbent resin, 15 parts of elastic aggregate, 5 parts of dispersible activator, 0.7 part of water reducer, 8 parts of latex, 5 parts of water-soluble resin, 0.7 part of dispersant, 0.6 part of defoamer, 7 parts of aluminum sulfate, 18 parts of calcium oxide, 0.7 part of hydroxy-acid salt, 3 parts of powdered asphalt, 4 parts of retarder and a proper amount of water.
4. The concrete expansive agent according to claim 1, wherein the elastic aggregate has a particle size in the range of 0.05 to 0.20 mm, and is one or a combination of more of rubber granules, silica gel granules and plastic granules.
5. The concrete expanding agent of claim 1, wherein the water reducing agent is a powdered polycarboxylic acid water reducing agent or a powdered naphthalene water reducing agent, and the dispersible active agent is one or more of calcium carbonate, sodium sulfate and zinc chloride.
6. The concrete expansive agent as claimed in claim 1, wherein the water-soluble resin is one or more of water-soluble urea-formaldehyde resin, water-soluble epoxy resin and water-soluble acrylic acid modified alkyd resin, the average particle size of the asphalt powder is less than or equal to 80 μm, and the asphalt powder is obtained by spray drying the emulsified asphalt.
7. The concrete expansive agent as claimed in claim 1, wherein the hydroxy-acid salt is one or more of zinc gluconate, sodium D-gluconate and potassium gluconate, and the retarder is one or more of sodium citrate and L-tartaric acid.
8. The concrete expansive agent as claimed in claim 1, wherein said sinking beads have an average particle diameter of about 1.2 μm and are obtained from soot generated by combustion in a fuel boiler.
9. The process for preparing a concrete expansive agent according to claims 1 to 8, which comprises the steps of:
step S1: dispersing the straws after impurity removal in a mixed solution of isopropanol and sodium hydroxide, putting the mixed solution into a water bath reaction kettle with a stirrer, heating in a water bath, stirring for reaction for 6-13 hours, and filtering to remove filter residues to obtain natural polymer cellulose and lignin alkali liquor;
step S2: neutralizing the obtained natural polymer cellulose and lignin alkali liquor to be neutral by using glacial acetic acid with the mass fraction of 95% in a slow dropwise adding mode to obtain a natural polymer cellulose and lignin suspension;
step S3: reacting natural high-molecular cellulose, lignin suspension and 3-chloro-2-hydroxypropyl trimethyl ammonium chloride in an alkaline solution, grafting 2-hydroxypropyl trimethyl ammonium chloride on molecular chains of the natural high-molecular cellulose and the lignin, then reacting with chloroacetic acid in an ethanol-water mixed solvent, and grafting acetic acid groups on the natural high-molecular cellulose and the lignin to form the natural high-molecular cellulose and the lignin modified into the amphoteric adsorbent of anions and cations;
step S4: adding the sinking beads, the water-absorbent resin, the elastic aggregate, the water-soluble resin, the aluminum sulfate, the calcium oxide, the hydroxyl hydroxy acid salt, the powdered asphalt, the natural polymer cellulose of the obtained amphoteric adsorbent and the lignin into ball-milling equipment, and milling to the required fineness;
step S5: adding a dispersible activator, a water reducing agent, latex, a dispersing agent, a defoaming agent and a retarder according to a proportion, uniformly mixing, and continuously grinding to 500m 2/kg;
step S6: and cooling the prepared expanding agent to room temperature, and then bagging and sealing for storage.
10. The concrete expansive agent as claimed in claim 9, wherein the pulverizing equipment is preferably an electromagnetic magnetic vibration mill, a planetary ball mill or a continuous powder surface modifying machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011385057.XA CN112390565A (en) | 2020-12-02 | 2020-12-02 | Concrete expanding agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011385057.XA CN112390565A (en) | 2020-12-02 | 2020-12-02 | Concrete expanding agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112390565A true CN112390565A (en) | 2021-02-23 |
Family
ID=74604097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011385057.XA Pending CN112390565A (en) | 2020-12-02 | 2020-12-02 | Concrete expanding agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112390565A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115572111A (en) * | 2022-10-14 | 2023-01-06 | 中建商品混凝土（福建）有限公司 | Preparation method of modified nano-cellulose reinforced high-crack-resistance cement |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167537A (en) * | 2011-01-27 | 2011-08-31 | 南京瑞迪高新技术公司 | Reinforced concrete antirust agent with sulfate corrosion resistant function |
| CN102626608A (en) * | 2012-04-16 | 2012-08-08 | 南京大学 | Straw modified into amphiprotic adsorbent and preparation method thereof |
| CN106966648A (en) * | 2017-03-10 | 2017-07-21 | 陕西省石油化工研究设计院 | A kind of anti-CO2、H2S corrodes cementing slurry |
| CN107746199A (en) * | 2017-11-09 | 2018-03-02 | 福清市永春混凝土外加剂有限公司 | A kind of cement expansive material and preparation method and application |
| KR101893060B1 (en) * | 2018-03-06 | 2018-08-29 | (주)엠디비산업 | Mortar composition for repairing and reinforcing concrete structure, and method of repairing and reinforcing concrete structure using the same |
| CN108623228A (en) * | 2018-06-27 | 2018-10-09 | 广东盖特奇新材料科技有限公司 | A kind of seawater corrosion resistance inorganic structure fluid sealant and preparation method thereof |
| CN110746165A (en) * | 2019-11-14 | 2020-02-04 | 广西云燕特种水泥建材有限公司 | Ocean engineering repair mortar and preparation method thereof |
-
2020
- 2020-12-02 CN CN202011385057.XA patent/CN112390565A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167537A (en) * | 2011-01-27 | 2011-08-31 | 南京瑞迪高新技术公司 | Reinforced concrete antirust agent with sulfate corrosion resistant function |
| CN102626608A (en) * | 2012-04-16 | 2012-08-08 | 南京大学 | Straw modified into amphiprotic adsorbent and preparation method thereof |
| CN106966648A (en) * | 2017-03-10 | 2017-07-21 | 陕西省石油化工研究设计院 | A kind of anti-CO2、H2S corrodes cementing slurry |
| CN107746199A (en) * | 2017-11-09 | 2018-03-02 | 福清市永春混凝土外加剂有限公司 | A kind of cement expansive material and preparation method and application |
| KR101893060B1 (en) * | 2018-03-06 | 2018-08-29 | (주)엠디비산업 | Mortar composition for repairing and reinforcing concrete structure, and method of repairing and reinforcing concrete structure using the same |
| CN108623228A (en) * | 2018-06-27 | 2018-10-09 | 广东盖特奇新材料科技有限公司 | A kind of seawater corrosion resistance inorganic structure fluid sealant and preparation method thereof |
| CN110746165A (en) * | 2019-11-14 | 2020-02-04 | 广西云燕特种水泥建材有限公司 | Ocean engineering repair mortar and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115572111A (en) * | 2022-10-14 | 2023-01-06 | 中建商品混凝土（福建）有限公司 | Preparation method of modified nano-cellulose reinforced high-crack-resistance cement |
| CN115572111B (en) * | 2022-10-14 | 2023-11-03 | 中建商品混凝土（福建）有限公司 | Preparation method of modified nanocellulose reinforced high-crack-resistance cement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113354334B (en) | Composite fiber anti-cracking agent | |
| CN112745075A (en) | Corrosion-resistant recycled concrete and production process thereof | |
| CN109942219B (en) | Concrete glue reducing agent with slump retaining effect | |
| CN113213854B (en) | Fair-faced concrete produced from construction waste recycled aggregate and preparation method thereof | |
| CN112010595A (en) | Preparation method of high-strength semi-recycled coarse aggregate concrete | |
| CN112876169B (en) | Slurry coating composition, slurry coating aggregate and preparation method thereof | |
| CN108275960B (en) | Curing agent for civil engineering material and preparation method thereof | |
| EP2623476A1 (en) | Use of carboxymethyl chitosans as additives in agglomerating compositions | |
| CN112980454A (en) | Novel environment-friendly soil curing agent and preparation method thereof | |
| CN107602013B (en) | Bentonite cement-based composite material and preparation method thereof | |
| CN112390565A (en) | Concrete expanding agent and preparation method thereof | |
| CN1260769A (en) | Aqueous suspensions of metakaolin and method of producing cementitious | |
| CN115259735B (en) | Viscosity-reducing phase-change material for concrete and preparation method and application thereof | |
| CN107417236B (en) | Water-based capillary crystalline waterproof material | |
| CN114477873B (en) | Recycled aggregate self-compacting concrete and preparation method thereof | |
| CN115710105A (en) | High-strength reinforced concrete and preparation method thereof | |
| Mollamahmutoglu | Treatment of medium-to coarse-grained sands by fine-grained portland cement (FGPC) as an alternative grouting material to silicate-ester grouts | |
| CN108751766A (en) | A kind of nanometer alumina modified alkali-excited cement accumulation of salt in the surface soil inhibitor and preparation method thereof | |
| KR101554864B1 (en) | A preparation method of concrete with a precipitation agent for recovered remocon water and concrete made thereby | |
| CN114956718A (en) | Low-fluidity-loss ultrahigh-performance concrete and preparation method thereof | |
| CN113135703A (en) | High-strength recycled concrete and preparation method thereof | |
| CN114149214A (en) | Early strength concrete and preparation method and application thereof | |
| CN112456881A (en) | High-durability concrete and preparation method thereof | |
| CN114380527B (en) | Reinforced modifier for concrete admixture and preparation method thereof | |
| JP4627153B2 (en) | Suspension type ground improvement material and manufacturing 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210223 |
|
| RJ01 | Rejection of invention patent application after publication |