CN111423184A - Environment-friendly anti-cracking dry powder mortar and preparation method thereof - Google Patents
Environment-friendly anti-cracking dry powder mortar and preparation method thereof Download PDFInfo
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- CN111423184A CN111423184A CN202010332285.4A CN202010332285A CN111423184A CN 111423184 A CN111423184 A CN 111423184A CN 202010332285 A CN202010332285 A CN 202010332285A CN 111423184 A CN111423184 A CN 111423184A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1037—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Abstract
The invention discloses environment-friendly anti-cracking dry powder mortar and a preparation method thereof, and relates to the technical field of building materials. According to the invention, firstly, aniline is used for coating bamboo fibers, then the bamboo fibers after being coated are placed in polyurethane emulsion and react under the action of an initiator to prepare modified bamboo fibers, then, coconut fibers react with acrylic acid and acrylamide together to prepare modified coconut fibers, finally, the modified coconut fibers and the modified bamboo fibers are added into cement, and water, stone powder and fly ash are added and stirred and mixed to obtain the environment-friendly anti-cracking dry powder mortar. The environment-friendly anti-cracking dry powder mortar prepared by the invention has excellent anti-cracking performance, and the added modified bamboo fiber and modified coconut fiber have less environmental pollution.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to environment-friendly anti-cracking dry powder mortar and a preparation method thereof.
Background
Along with the improvement of living standard of people, the requirement on building quality is higher and higher. Due to the technical proficiency of constructors and the influence of the quality of various raw materials such as cement, sand and the like, the mortar configured on a construction site, whether masonry mortar, plastering mortar or ground leveling mortar, often cracks in the plastering mortar of the building (even the most traditional clay brick wall is plastered by cement mortar, large-area cracks can also occur), so that the conditions that the engineering quality is unstable, the strength cannot meet the requirement, and even the quality is poor are caused, and the mortar is a common problem of the building quality.
Disclosure of Invention
The invention aims to provide environment-friendly anti-cracking dry powder mortar and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the environment-friendly anti-cracking dry powder mortar is characterized by mainly comprising the following raw material components in parts by weight: 100-120 parts of cement, 20-30 parts of stone powder, 5-10 parts of fly ash and 30-40 parts of water.
The environment-friendly anti-cracking dry powder mortar is characterized by also comprising the following raw material components in parts by weight: 1-8 parts of modified bamboo fiber and 1-10 parts of modified coconut fiber.
Preferably, the cement is ordinary 42.5 portland cement, and the stone powder is prepared by crushing sand and stone through a crusher and sieving through a 200-mesh sieve.
The modified bamboo fiber is prepared by coating bamboo fiber with aniline, and treating the coated bamboo fiber with an initiator in polyurethane emulsion; the modified coconut fiber is prepared by the joint reaction of coconut fiber, acrylic acid and acrylamide.
As optimization, the environment-friendly anti-cracking dry powder mortar mainly comprises the following raw material components in parts by weight: 100 parts of ordinary portland cement, 25 parts of stone powder, 5 parts of fly ash, 30 parts of water, 8 parts of modified bamboo fiber and 5 parts of modified coconut fiber.
As optimization, the preparation method of the environment-friendly anti-cracking dry powder mortar mainly comprises the following preparation steps:
(1) mixing bamboo fibers with a nitric acid solution, adding aniline, stirring and mixing, filtering to obtain pretreated bamboo fibers, mixing the pretreated bamboo fibers with a polyurethane emulsion, adding polyvinylpyrrolidone and ammonium persulfate, filtering, washing and drying after the teaching plan cannot react to obtain modified bamboo fibers;
(2) mixing the pretreated coconut fibers with a dilute nitric acid solution, adding ammonium ceric nitrate, acrylic acid and acrylamide in a nitrogen atmosphere, stirring for reaction, then adding methylene bisacrylamide, stirring for reaction, and filtering to obtain modified coconut fibers;
(3) mixing ordinary portland cement with water, adding stone powder and fly ash, mixing the modified bamboo fiber obtained in the step (1) and the modified coconut fiber obtained in the step (2), and stirring and mixing to obtain environment-friendly anti-cracking dry powder mortar;
(4) and (4) carrying out index analysis on the environment-friendly anti-cracking dry powder mortar obtained in the step (3).
As optimization, the preparation method of the high-environment-friendly anti-cracking dry powder mortar mainly comprises the following preparation steps:
(1) mixing bamboo fibers with a nitric acid solution with the mass fraction of 2% according to the mass ratio of 1:120, adding an aniline monomer with the mass of 2-5 times that of the bamboo fibers, stirring and mixing, filtering, drying to obtain pretreated bamboo fibers, mixing the pretreated bamboo fibers with a polyurethane emulsion according to the mass ratio of 1:30, adding polyvinylpyrrolidone with the mass of 1-2 times that of the pretreated bamboo fibers and ammonium persulfate with the mass of 0.5-1.2 times that of the pretreated bamboo fibers, stirring and reacting, filtering, and drying to obtain modified bamboo fibers;
(2) mixing the pretreated coconut fibers with a nitric acid solution with the mass fraction of 2% according to the mass ratio of 1:30, adding ammonium ceric nitrate with the mass of 0.3-0.6 times that of the pretreated coconut fibers, acrylic acid with the mass of 0.6-1.2 times that of the pretreated coconut fibers and acrylamide with the mass of 1.0-1.6 times that of the pretreated coconut fibers, stirring and reacting for 1-5 min under the nitrogen atmosphere, adding methylene bisacrylamide with the mass of 0.2-0.6 times that of the pretreated coconut fibers, stirring and reacting for 3-5 h, filtering, and drying to obtain modified coconut fibers;
(3) mixing ordinary Portland cement and water according to the mass ratio of 10: 3, mixing, adding stone powder which is 0.25 time of the mass of ordinary portland cement, fly ash which is 0.05 time of the mass of ordinary portland cement, modified bamboo fiber which is 0.08 time of the mass of ordinary portland cement and is obtained in the step (1) and modified coconut fiber which is 0.05 time of the mass of ordinary portland cement and is obtained in the step (2), stirring and mixing to obtain the environment-friendly anti-cracking dry powder mortar;
(4) and (4) carrying out index analysis on the environment-friendly anti-cracking dry powder mortar obtained in the step (3).
Optimally, the preparation method of the polyurethane emulsion in the step (1) comprises the steps of mixing polyether polyol and isophorone diisocyanate according to a molar ratio of 1: 1.2-1: 2, adding N-methyl pyrrolidone 2-3 times of the mass of the polyether polyol, stirring and mixing to obtain a mixed solution, mixing the mixed solution with dimethylolpropionic acid according to a mass ratio of 20: 1, adding dibutyltin dilaurate with the mass of 0.01-0.04 times of that of the mixed solution, carrying out reflux stirring reaction for 3-4 h at the temperature of 80 ℃, adding triethylamine with the mass of 0.4-0.5 times of that of the mixed solution at the temperature of 60 ℃, carrying out stirring reaction to obtain a blank liquid, mixing the blank liquid and water according to the mass ratio of 1:3, adding diethylamine with the mass of 0.1 time of that of the blank liquid, and carrying out stirring mixing to obtain the polyurethane emulsion.
Optimally, the step (2) of pretreating the coconut fibers is to mix the coconut fibers with mixed acid liquor according to the mass ratio of 1:10, stir and react, filter, wash and dry to obtain pretreated coconut fibers; the mixed acid liquid is obtained by mixing 5 mass percent of nitric acid and 10 mass percent of acetic acid according to the mass ratio of 2: 1.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the modified bamboo fiber and the modified coconut fiber are added in the process of preparing the environment-friendly anti-cracking dry powder mortar, firstly, the addition of the modified bamboo fiber and the modified coconut fiber can improve the internal binding force of the mortar in the mortar curing process, so that the anti-cracking performance of the product is improved; secondly, the bamboo fiber surface is coated with a polyurethane elastic layer after modification treatment, so that the bamboo fiber has good elasticity, after the bamboo fiber is added into the environment-friendly anti-cracking dry powder mortar, the anti-cracking performance of the product can be further improved, furthermore, after the coconut fiber is modified, the surface of the coconut fiber is grafted with polyacrylamide, and in the preparation process of the modified coconut fiber, the polyacrylamide can absorb water to expand, after the coconut fiber is added into the environment-friendly anti-cracking dry powder mortar, the contact area between the modified coconut fiber and the mortar matrix can be improved, meanwhile, the flocculation effect of the polyacrylamide can enable cement to be firstly cured around the modified coconut fiber, so that the internal binding force of the product can be further improved, and the anti-cracking performance of the product can be further improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to more clearly illustrate the method provided by the invention, the following examples are used for detailed description, and the test method of each index of the environment-friendly anti-cracking dry powder mortar prepared in the following examples is as follows:
cracking resistance: the cracking resistance of the environment-friendly cracking-resistant dry powder mortar obtained in each embodiment and a comparative product is tested by adopting a flat plate constraint method, the environment-friendly cracking-resistant dry powder mortar obtained in each embodiment and the comparative product are put into a mold, the mold is placed in an environment with the relative stability of 35 ℃ and the relative humidity of 31%, and the initial cracking time and the cracking area ratio after 300 hours are recorded.
Example 1
The environment-friendly anti-cracking dry powder mortar mainly comprises the following components in parts by weight: 100 parts of ordinary portland cement, 25 parts of stone powder, 5 parts of fly ash, 30 parts of water, 8 parts of modified bamboo fiber and 5 parts of modified coconut fiber.
The preparation method of the environment-friendly anti-cracking dry powder mortar mainly comprises the following preparation steps:
(1) mixing bamboo fiber and nitric acid solution with the mass fraction of 2% in a beaker according to the mass ratio of 1:120, adding aniline monomer with the mass of 3 times of that of the bamboo fiber into the beaker, stirring and mixing for 80min at the temperature of 30 ℃ and the rotating speed of 400r/min, filtering to obtain a pretreated bamboo fiber blank, drying the pretreated bamboo fiber blank for 30min at the temperature of 85 ℃ to obtain pretreated bamboo fiber, mixing the pretreated bamboo fiber and polyurethane emulsion in the flask according to the mass ratio of 1:30, adding polyvinylpyrrolidone with the mass of 1 time of that of the pretreated bamboo fiber and ammonium persulfate with the mass of 0.8 time of that of the pretreated bamboo fiber into the flask, stirring and reacting for 4h at the temperature of 85 ℃ and the rotating speed of 300r/min, filtering to obtain a modified bamboo fiber blank, drying the modified bamboo fiber blank for 2h at the temperature of 65 ℃, obtaining modified bamboo fiber;
(2) mixing pretreated coconut fibers and a nitric acid solution with the mass fraction of 2% in a three-neck flask according to the mass ratio of 1:30, adding ammonium ceric nitrate with the mass of 0.3-0.6 times that of the pretreated coconut fibers into the three-neck flask, acrylic acid with the mass of 0.6-1.2 times that of the pretreated coconut fibers and acrylamide with the mass of 1.0-1.6 times that of the pretreated coconut fibers into the three-neck flask, introducing nitrogen into the three-neck flask at the speed of 30m L/min, stirring at the temperature of 90 ℃ for 3min, adding methylene bisacrylamide with the mass of 0.4 times that of the pretreated coconut fibers into the three-neck flask, stirring at the temperature of 80 ℃ for 3h, filtering to obtain a modified coconut fiber blank, and drying the modified coconut fiber blank at the temperature of 65 ℃ for 1h to obtain modified coconut fibers;
(3) mixing ordinary Portland cement and water according to the mass ratio of 10: 3, mixing the materials in a stirrer, adding stone powder which is 0.25 time of the mass of ordinary portland cement, fly ash which is 0.05 time of the mass of ordinary portland cement, modified bamboo fiber which is 0.08 time of the mass of ordinary portland cement and is obtained in the step (1) and modified coconut fiber which is 0.05 time of the mass of ordinary portland cement and is obtained in the step (2) into the stirrer, and stirring and mixing to obtain environment-friendly anti-cracking dry powder mortar;
(4) and (4) carrying out index analysis on the environment-friendly anti-cracking dry powder mortar obtained in the step (3).
Optimally, the preparation method of the polyurethane emulsion in the step (1) comprises the steps of mixing polyether polyol and isophorone diisocyanate according to a molar ratio of 1:1.2, adding N-methyl pyrrolidone 3 times the mass of the polyether polyol, stirring and mixing to obtain a mixed solution, mixing the mixed solution and dimethylolpropionic acid according to a mass ratio of 20: 1, adding dibutyltin dilaurate with the mass of 0.02 time of that of the mixed solution, carrying out reflux stirring reaction for 3.5 hours at the temperature of 80 ℃, then adding triethylamine with the mass of 0.5 time of that of the mixed solution at the temperature of 60 ℃, carrying out stirring reaction to obtain a blank liquid, mixing the blank liquid and water according to the mass ratio of 1:3, adding diethylamine with the mass of 0.1 time of that of the blank liquid, and carrying out stirring mixing to obtain the polyurethane emulsion.
Optimally, the step (2) of pretreating the coconut fibers is to mix the coconut fibers with mixed acid liquor according to the mass ratio of 1:10, stir and react, filter, wash and dry to obtain pretreated coconut fibers; the mixed acid liquid is obtained by mixing 5 mass percent of nitric acid and 10 mass percent of acetic acid according to the mass ratio of 2: 1.
Example 2
The environment-friendly anti-cracking dry powder mortar mainly comprises the following components in parts by weight: 100 parts of ordinary portland cement, 25 parts of mountain flour, 5 parts of fly ash, 30 parts of water, 8 parts of modified bamboo fiber and 5 parts of coconut fiber.
The preparation method of the environment-friendly anti-cracking dry powder mortar mainly comprises the following preparation steps:
(1) mixing bamboo fiber and nitric acid solution with the mass fraction of 2% in a beaker according to the mass ratio of 1:120, adding aniline monomer with the mass of 3 times of that of the bamboo fiber into the beaker, stirring and mixing for 80min at the temperature of 30 ℃ and the rotating speed of 400r/min, filtering to obtain a pretreated bamboo fiber blank, drying the pretreated bamboo fiber blank for 30min at the temperature of 85 ℃ to obtain pretreated bamboo fiber, mixing the pretreated bamboo fiber and polyurethane emulsion in the flask according to the mass ratio of 1:30, adding polyvinylpyrrolidone with the mass of 1 time of that of the pretreated bamboo fiber and ammonium persulfate with the mass of 0.8 time of that of the pretreated bamboo fiber into the flask, stirring and reacting for 4h at the temperature of 85 ℃ and the rotating speed of 300r/min, filtering to obtain a modified bamboo fiber blank, drying the modified bamboo fiber blank for 2h at the temperature of 65 ℃, obtaining modified bamboo fiber;
(2) mixing ordinary Portland cement and water according to the mass ratio of 10: 3, mixing the materials in a stirrer, adding stone powder which is 0.25 time of the mass of ordinary portland cement, fly ash which is 0.05 time of the mass of ordinary portland cement, modified bamboo fiber which is 0.08 time of the mass of ordinary portland cement and coconut fiber which is 0.05 time of the mass of ordinary portland cement into the stirrer, and stirring and mixing to obtain environment-friendly anti-cracking dry powder mortar;
(3) and (3) carrying out index analysis on the environment-friendly anti-cracking dry powder mortar obtained in the step (2).
Optimally, the preparation method of the polyurethane emulsion in the step (1) comprises the steps of mixing polyether polyol and isophorone diisocyanate according to a molar ratio of 1:1.2, adding N-methyl pyrrolidone 3 times the mass of the polyether polyol, stirring and mixing to obtain a mixed solution, mixing the mixed solution and dimethylolpropionic acid according to a mass ratio of 20: 1, adding dibutyltin dilaurate with the mass of 0.02 time of that of the mixed solution, carrying out reflux stirring reaction for 3.5 hours at the temperature of 80 ℃, then adding triethylamine with the mass of 0.5 time of that of the mixed solution at the temperature of 60 ℃, carrying out stirring reaction to obtain a blank liquid, mixing the blank liquid and water according to the mass ratio of 1:3, adding diethylamine with the mass of 0.1 time of that of the blank liquid, and carrying out stirring mixing to obtain the polyurethane emulsion.
Example 3
The environment-friendly anti-cracking dry powder mortar mainly comprises the following components in parts by weight: 100 parts of ordinary portland cement, 25 parts of mountain flour, 5 parts of fly ash, 30 parts of water, 8 parts of bamboo fiber and 5 parts of modified coconut fiber.
The preparation method of the environment-friendly anti-cracking dry powder mortar mainly comprises the following preparation steps:
(1) mixing pretreated coconut fibers and a nitric acid solution with the mass fraction of 2% in a three-neck flask according to the mass ratio of 1:30, adding ammonium ceric nitrate with the mass of 0.3-0.6 times that of the pretreated coconut fibers into the three-neck flask, acrylic acid with the mass of 0.6-1.2 times that of the pretreated coconut fibers and acrylamide with the mass of 1.0-1.6 times that of the pretreated coconut fibers into the three-neck flask, introducing nitrogen into the three-neck flask at the speed of 30m L/min, stirring at the temperature of 90 ℃ for 3min, adding methylene bisacrylamide with the mass of 0.4 times that of the pretreated coconut fibers into the three-neck flask, stirring at the temperature of 80 ℃ for 3h, filtering to obtain a modified coconut fiber blank, and drying the modified coconut fiber blank at the temperature of 65 ℃ for 1h to obtain modified coconut fibers;
(2) mixing ordinary Portland cement and water according to the mass ratio of 10: 3, mixing the materials in a stirrer, adding stone powder which is 0.25 time of the mass of the ordinary portland cement, fly ash which is 0.05 time of the mass of the ordinary portland cement, bamboo fiber which is 0.08 time of the mass of the ordinary portland cement and the modified coconut fiber obtained in the step (1) which is 0.05 time of the mass of the ordinary portland cement into the stirrer, and stirring and mixing to obtain the environment-friendly anti-cracking dry powder mortar;
(3) and (3) carrying out index analysis on the environment-friendly anti-cracking dry powder mortar obtained in the step (2).
Optimally, the step (1) of pretreating the coconut fibers is to mix the coconut fibers with mixed acid liquor according to the mass ratio of 1:10, stir and react, filter, wash and dry to obtain pretreated coconut fibers; the mixed acid liquid is obtained by mixing 5 mass percent of nitric acid and 10 mass percent of acetic acid according to the mass ratio of 2: 1.
Comparative example
The environment-friendly anti-cracking dry powder mortar mainly comprises the following components in parts by weight: 100 parts of ordinary portland cement, 25 parts of stone powder, 5 parts of fly ash, 30 parts of water, 8 parts of modified bamboo fiber and 5 parts of modified coconut fiber.
The preparation method of the environment-friendly anti-cracking dry powder mortar mainly comprises the following preparation steps:
(1) mixing ordinary Portland cement and water according to the mass ratio of 10: 3, mixing the materials in a stirrer, adding stone powder which is 0.25 time of the mass of the ordinary portland cement, fly ash which is 0.05 time of the mass of the ordinary portland cement, bamboo fiber which is 0.08 time of the mass of the ordinary portland cement and coconut fiber which is 0.05 time of the mass of the ordinary portland cement into the stirrer, and stirring and mixing to obtain the environment-friendly anti-cracking dry powder mortar;
(2) and (3) carrying out index analysis on the environment-friendly anti-cracking dry powder mortar obtained in the step (1).
Examples of effects
The following table 1 shows the performance analysis results of the environmentally friendly anti-cracking dry powder mortar using examples 1 to 3 of the present invention and a comparative example.
TABLE 1
From the comparison of the experimental data of example 1 and the comparative example in table 1, it can be found that the addition of the modified bamboo fiber and the modified coconut fiber can effectively prolong the initial cracking time of the product and reduce the cracking area when preparing the environment-friendly anti-cracking dry powder mortar, thereby improving the anti-cracking performance of the product; from the experimental data comparison of the example 1 and the example 2, it can be found that when the added coconut fibers are not modified, the strength of the coconut fibers is reduced, so that the initial cracking time of the product is advanced, and the cracking resistance of the product is affected, and from the experimental data comparison of the example 1 and the example 3, when the bamboo fibers added into the environment-friendly cracking resistance dry powder mortar are not modified, the surfaces of the bamboo fibers do not contain polyacrylamide, so that the bonding force inside the mortar is weak, and the bonding force between the coconut fibers and the matrix is weak, and the cracking resistance of the product is affected.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The environment-friendly anti-cracking dry powder mortar is characterized by mainly comprising the following raw material components in parts by weight: 100-120 parts of cement, 20-30 parts of stone powder, 5-10 parts of fly ash and 30-40 parts of water.
2. The environment-friendly anti-cracking dry powder mortar of claim 1, further comprising the following raw material components in parts by weight: 1-8 parts of modified bamboo fiber and 1-10 parts of modified coconut fiber.
3. The environment-friendly anti-cracking dry powder mortar of claim 2, wherein the cement is ordinary 42.5 portland cement, and the stone powder is prepared by crushing sand and stone with a crusher and sieving with a 200-mesh sieve.
4. The environment-friendly anti-cracking dry powder mortar of claim 3, wherein the modified bamboo fiber is prepared by coating bamboo fiber with aniline, and treating the coated bamboo fiber with an initiator in polyurethane emulsion; the modified coconut fiber is prepared by the joint reaction of coconut fiber, acrylic acid and acrylamide.
5. The environment-friendly anti-cracking dry powder mortar of claim 4, wherein the environment-friendly anti-cracking dry powder mortar mainly comprises the following raw material components in parts by weight: 100 parts of ordinary portland cement, 25 parts of stone powder, 5 parts of fly ash, 30 parts of water, 8 parts of modified bamboo fiber and 5 parts of modified coconut fiber.
6. The preparation method of the environment-friendly anti-cracking dry powder mortar is characterized by mainly comprising the following preparation steps:
(1) mixing bamboo fibers with a nitric acid solution, adding aniline, stirring and mixing, filtering to obtain pretreated bamboo fibers, mixing the pretreated bamboo fibers with a polyurethane emulsion, adding polyvinylpyrrolidone and ammonium persulfate, filtering, washing and drying after the teaching plan cannot react to obtain modified bamboo fibers;
(2) mixing the pretreated coconut fibers with a dilute nitric acid solution, adding ammonium ceric nitrate, acrylic acid and acrylamide in a nitrogen atmosphere, stirring for reaction, then adding methylene bisacrylamide, stirring for reaction, and filtering to obtain modified coconut fibers;
(3) mixing ordinary portland cement with water, adding stone powder and fly ash, mixing the modified bamboo fiber obtained in the step (1) and the modified coconut fiber obtained in the step (2), and stirring and mixing to obtain environment-friendly anti-cracking dry powder mortar;
(4) and (4) carrying out index analysis on the environment-friendly anti-cracking dry powder mortar obtained in the step (3).
7. The preparation method of the high-environment-friendly anti-cracking dry powder mortar according to claim 6, which is characterized by mainly comprising the following preparation steps:
(1) mixing bamboo fibers with a nitric acid solution with the mass fraction of 2% according to the mass ratio of 1:120, adding an aniline monomer with the mass of 2-5 times that of the bamboo fibers, stirring and mixing, filtering, drying to obtain pretreated bamboo fibers, mixing the pretreated bamboo fibers with a polyurethane emulsion according to the mass ratio of 1:30, adding polyvinylpyrrolidone with the mass of 1-2 times that of the pretreated bamboo fibers and ammonium persulfate with the mass of 0.5-1.2 times that of the pretreated bamboo fibers, stirring and reacting, filtering, and drying to obtain modified bamboo fibers;
(2) mixing the pretreated coconut fibers with a nitric acid solution with the mass fraction of 2% according to the mass ratio of 1:30, adding ammonium ceric nitrate with the mass of 0.3-0.6 times that of the pretreated coconut fibers, acrylic acid with the mass of 0.6-1.2 times that of the pretreated coconut fibers and acrylamide with the mass of 1.0-1.6 times that of the pretreated coconut fibers, stirring and reacting for 1-5 min under the nitrogen atmosphere, adding methylene bisacrylamide with the mass of 0.2-0.6 times that of the pretreated coconut fibers, stirring and reacting for 3-5 h, filtering, and drying to obtain modified coconut fibers;
(3) mixing ordinary Portland cement and water according to the mass ratio of 10: 3, mixing, adding stone powder which is 0.25 time of the mass of ordinary portland cement, fly ash which is 0.05 time of the mass of ordinary portland cement, modified bamboo fiber which is 0.08 time of the mass of ordinary portland cement and is obtained in the step (1) and modified coconut fiber which is 0.05 time of the mass of ordinary portland cement and is obtained in the step (2), stirring and mixing to obtain the environment-friendly anti-cracking dry powder mortar;
(4) and (4) carrying out index analysis on the environment-friendly anti-cracking dry powder mortar obtained in the step (3).
8. The method for preparing the environment-friendly anti-cracking dry powder mortar according to claim 6, wherein the method for preparing the polyurethane emulsion in the step (1) comprises the steps of mixing polyether polyol and isophorone diisocyanate according to a molar ratio of 1: 1.2-1: 2, adding N-methyl pyrrolidone 2-3 times the mass of the polyether polyol, stirring and mixing to obtain a mixed solution, mixing the mixed solution with dimethylolpropionic acid according to a mass ratio of 20: 1, adding dibutyltin dilaurate with the mass of 0.01-0.04 times of that of the mixed solution, carrying out reflux stirring reaction for 3-4 h at the temperature of 80 ℃, adding triethylamine with the mass of 0.4-0.5 times of that of the mixed solution at the temperature of 60 ℃, carrying out stirring reaction to obtain a blank liquid, mixing the blank liquid and water according to the mass ratio of 1:3, adding diethylamine with the mass of 0.1 time of that of the blank liquid, and carrying out stirring mixing to obtain the polyurethane emulsion.
9. The preparation method of the environment-friendly anti-cracking dry powder mortar according to claim 6, wherein the pre-treated coconut fiber in the step (2) is prepared by mixing coconut fiber and mixed acid liquor according to a mass ratio of 1:10, stirring for reaction, filtering, washing and drying to obtain pre-treated coconut fiber; the mixed acid liquid is obtained by mixing 5 mass percent of nitric acid and 10 mass percent of acetic acid according to the mass ratio of 2: 1.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120006500A1 (en) * | 2009-11-23 | 2012-01-12 | Mavis Zhou | Bamboo fiber material |
| CN102850775A (en) * | 2012-09-04 | 2013-01-02 | 绍兴文理学院元培学院 | Bamboo fiber and polyurethane composite material preparation method |
| CN104150843A (en) * | 2014-08-25 | 2014-11-19 | 福建巨岸建设工程有限公司 | Modified bamboo fiber/polymer composite high-toughness concrete and preparation method thereof |
| CN107698212A (en) * | 2015-09-12 | 2018-02-16 | 宁波高新区夏远科技有限公司 | A kind of composite environmental-friendly waterproof dry powder mortar and preparation method thereof |
-
2020
- 2020-04-24 CN CN202010332285.4A patent/CN111423184A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120006500A1 (en) * | 2009-11-23 | 2012-01-12 | Mavis Zhou | Bamboo fiber material |
| CN102850775A (en) * | 2012-09-04 | 2013-01-02 | 绍兴文理学院元培学院 | Bamboo fiber and polyurethane composite material preparation method |
| CN104150843A (en) * | 2014-08-25 | 2014-11-19 | 福建巨岸建设工程有限公司 | Modified bamboo fiber/polymer composite high-toughness concrete and preparation method thereof |
| CN107698212A (en) * | 2015-09-12 | 2018-02-16 | 宁波高新区夏远科技有限公司 | A kind of composite environmental-friendly waterproof dry powder mortar and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 叶颖薇等: "竹纤维和椰纤维增强水泥复合材料", 《复合材料学报》 * |
| 朱荣华等: "椰纤维/AA/AM在HNO_3稀溶液体系中的接枝共聚反应", 《热带农业科学》 * |
| 杨医博等: "《土木工程材料 第2版》", 31 December 2016, 广州：华南理工大学出版社 * |
| 高鹤等: "《工程材料试验》", 30 September 2014, 西安：西安交通大学出版社 * |
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