CN115321867A - Non-toxic modified silicon powder enhanced concrete powder compacting agent and preparation method thereof - Google Patents
Non-toxic modified silicon powder enhanced concrete powder compacting agent and preparation method thereof Download PDFInfo
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- CN115321867A CN115321867A CN202210942173.XA CN202210942173A CN115321867A CN 115321867 A CN115321867 A CN 115321867A CN 202210942173 A CN202210942173 A CN 202210942173A CN 115321867 A CN115321867 A CN 115321867A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0042—Powdery mixtures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a nontoxic modified silicon powder enhanced concrete powder compacting agent, which comprises the following raw material components in parts by mass: 10-20 parts of ethylenediamine acetate, 10-20 parts of sodium aminotriacetate and 10-15 parts of sodium aminotrimethyl phosphinate; 5-10 parts of modified silicon powder; and 35-65 of carrier. The modified silicon powder is ammonium humate modified silicon powder. The carrier is one of or a composition of fly ash, mineral powder, stone powder and zeolite powder. The enhanced concrete powder compacting agent provided by the invention does not contain volatile organic compounds, and can improve the durability and strength of concrete at each age.
Description
Technical Field
The invention belongs to the technical field of concrete production, and particularly relates to a nontoxic modified silicon powder enhanced concrete powder compacting agent and a preparation method thereof.
Background
The concrete densifier is a chemical additive for improving the durability and performance of concrete, is easy to dissolve in water, is uniformly distributed in the concrete after being stirred, and generates chemical reaction with cement hydration educt to generate crystal and gel, thereby reducing the volume shrinkage of the concrete and improving the crack resistance of the concrete. Meanwhile, in the growth process of the gel, the pores in the set cement are filled and blocked, and the communication of capillary pipelines is cut off, so that the porosity inside the concrete is reduced, and the compactness and the impermeability are improved. The concrete compacting agent is used as a product used in the concrete industry chain, and becomes one of essential raw materials in the production process of many concrete production enterprises. The water-based anti-cracking agent can bring practical benefits to concrete enterprises, and mainly has the main effects of obviously improving the impermeability of concrete, reducing shrinkage, preventing cracking, effectively preventing water molecule from permeating and obviously improving the strength of the concrete. In recent years, with the progress of concrete production technology and the increase of the use amount of concrete, the technical standard of concrete compacting agents is higher and higher.
At present, the most common concrete compacting agent is prepared by directly adding silica fume into concrete as a compacting agent, and has the advantages of low cost, convenient processing and the like. However, during the use process, the concrete has poor durability, reduced mechanical strength and risks of cracking due to large specific surface area of silica fume, large water demand and poor cement adaptability. The other concrete compacting agent is silica powder doped with waterproof agent and expanding agent. Most waterproofing agents and swelling agents contain volatile organic compounds, which are potentially harmful to the health of workers. In addition, the addition of a compacting agent such as a waterproofing agent or an expanding agent affects the hydration reaction of cement, thereby lowering the strength of concrete. Therefore, it is necessary to improve the above method and prepare a powder compacting agent which does not contain volatile organic compounds and can improve the durability and the strength of concrete in various ages.
The silicon powder is a byproduct of wet-process production of aluminum fluoride, is a non-toxic, tasteless and pollution-free inorganic non-metallic material, and is micropowder prepared by processing amorphous SiO2 through multiple processes such as crushing, ball milling, flotation, acid cleaning and purification, high-purity water treatment and the like. The silicon powder modified by ammonium salt has the advantages that the particle surface is wrapped by ammonium salt, the water requirement is reduced, the dispersibility is better, and the silicon powder is easy to be uniformly dispersed in the concrete stirring process. The powder compacting agent prepared from the modified silicon powder does not contain volatile organic compounds, can fill holes and gaps in concrete, and can be used for improving the durability and the strength of the concrete at various ages.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a nontoxic modified silicon powder enhanced concrete powder compacting agent and a preparation method thereof, so as to solve the problems in the background technology.
The purpose of the invention can be realized by the following technical scheme:
the non-toxic modified silicon powder enhanced concrete powder compacting agent comprises the following raw material components in parts by mass: 10-20 parts of ethylenediamine acetate, 10-20 parts of sodium aminotriacetate and 10-15 parts of sodium aminotrimethyl phosphinate; 5-10 parts of modified silicon powder; and 35-65 of a carrier.
Preferably, the modified silicon powder is ammonium humate modified silicon powder.
Preferably, the preparation method of the ammonium humate modified silicon powder comprises the following steps:
s1: dispersing 1 part of silicon powder in 50-120 parts of deionized water, and performing ultrasonic dispersion for 20-45min;
s2: adjusting the pH to 1-2;
s3: stirring and dripping 4-6 parts of ammonium humate aqueous solution at room temperature, and carrying out modification reaction for 24 hours;
s4: washing the product of the S3 to be neutral by using absolute ethyl alcohol and deionized water;
s5: and drying the mixture for 48 hours in a vacuum drying oven at the temperature of between 50 and 70 ℃ to obtain the modified silicon powder.
A preparation method of a nontoxic modified silicon powder enhanced concrete powder compacting agent comprises the following steps:
t1: selecting modified silicon powder in a carrier, and crushing for 5-10min by using an electromagnetic crusher;
t2: and sequentially adding ethylenediamine acetate, sodium aminotriacetate and sodium aminotrimethylenephosphonate in proportion, blending for 10-20min, standing for 24 h, and cooling to obtain the concrete powder compacting agent.
Preferably, the carrier is one of or a composition of fly ash, mineral powder, stone powder and zeolite powder. The invention has the beneficial effects that:
firstly, the concrete powder compacting agent does not contain volatile organic compounds and is harmless to human bodies;
secondly, the concrete powder compacting agent contains a large amount of hydroxyl and amino with strong polarity, is easy to adsorb on the surface of the silicon powder particles, neutralizes charges among the silicon powder particles, and can improve the durability of concrete when being doped into the concrete;
thirdly, the concrete powder compacting agent provided by the invention can improve the strength of concrete at each age. After the concrete powder compacting agent related by the invention is added during concrete stirring, the compressive strength and the flexural strength of the concrete can be obviously improved.
In conclusion, the concrete powder compacting agent provided by the invention is non-toxic, and not only can improve the durability of concrete, but also can improve the mechanical property of concrete.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a scanning electron microscope image of modified silicon powder;
FIG. 2 is a table comparing the properties of example 1, example 2, comparative example 1 and comparative example 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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 the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
The first embodiment is as follows:
a nontoxic modified silicon powder enhanced concrete powder compacting agent comprises the following raw material components in percentage by mass: 13% of ethylenediamine acetate, 15% of sodium aminotriacetate, 12% of sodium aminotrimethylene phosphonate, 6% of modified silicon powder and 54% of fly ash.
A preparation method of a nontoxic modified silicon powder enhanced concrete powder compacting agent comprises the following steps:
t1: selecting modified silicon powder and mixing with a carrier, and crushing for 5-10min by using an electromagnetic crusher;
t2: then sequentially adding ethylenediamine acetate, sodium aminotriacetate and sodium aminotrimethylenephosphonate, blending and reacting for 10-20min,
t3: standing for 24 hours, and cooling to obtain the concrete powder compacting agent.
The preparation method of the modified silicon powder comprises the following steps:
s1: dissolving 1 part of silicon powder in 50-120 parts of deionized water, and performing ultrasonic dispersion for 20-45min;
s2: adjusting the pH to 1-2;
s3: stirring at room temperature, dropwise adding 4-6 parts of ammonium humate aqueous solution, and performing modification reaction for 24 hours;
s4: washing the product obtained in the step S3 to be neutral by using absolute ethyl alcohol and deionized water;
s5: and drying the mixture for 48 hours in a vacuum drying oven at the temperature of between 50 and 70 ℃ to obtain the modified silicon powder.
The second embodiment:
the non-toxic modified silicon powder enhanced concrete powder compacting agent comprises the following raw material components in percentage by mass: 13% of ethylenediamine acetate, 15% of sodium aminotriacetate, 12% of sodium aminotrimethylene phosphonate, 8% of modified silicon powder and 52% of mineral powder.
A preparation method of a nontoxic modified silicon powder enhanced concrete powder compacting agent comprises the following steps:
t1: selecting modified silicon powder and mixing with a carrier, and crushing for 5-10min by using an electromagnetic crusher;
t2: then sequentially adding ethylenediamine acetate, sodium aminotriacetate and sodium aminotrimethylenephosphonate, blending and reacting for 10-20min,
and T3, standing for 24 hours, and cooling to obtain the concrete powder compacting agent.
The preparation method of the modified silicon powder comprises the following steps:
s1: 1 part of silicon powder is dissolved in 50 to 120 parts of deionized water, and ultrasonic dispersion is carried out for 20 to 45min;
s2: adjusting the pH to 1-2;
s3: stirring and dripping 4-6 parts of ammonium humate aqueous solution at room temperature, and carrying out modification reaction for 24 hours;
s4: washing the product obtained in the step S3 to be neutral by using absolute ethyl alcohol and deionized water;
s5: and drying the mixture for 48 hours in a vacuum drying oven at the temperature of between 50 and 70 ℃ to obtain the modified silicon powder.
Experimental comparisons were made between examples of the invention and comparative examples:
comparative example 1: the mixing amount of a certain commercially available waterproof compacting agent is 0.15 percent of the total amount of the concrete.
Comparative example 2: the mixing amount of a certain commercial powder siliceous compactive agent is 0.15 percent of the total amount of the concrete.
Selecting a concrete mixture with the grade of C40, and respectively adding the compacting agents of the embodiments 1 and 2 and the comparative examples 1 and 2, wherein the addition amount of the compacting agents is 0.15 percent of the total amount of the concrete cementing material. Concrete impermeability and mechanical properties were tested, and the specific test results are shown in the table of fig. 1.
As can be seen from the experimental data in the table of FIG. 1, the concrete powder compacting agent of the invention requires less water, and can significantly improve the durability and the flexural and compressive strength of the concrete.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (5)
1. The non-toxic modified silicon powder enhanced concrete powder compacting agent is characterized by comprising the following raw material components in parts by mass: 10-20 parts of ethylenediamine acetate, 10-20 parts of sodium aminotriacetate and 10-15 parts of sodium aminotrimethylenephosphonate; 5-10 parts of modified silicon powder; and 35-65 of carrier.
2. The nontoxic modified silicon powder enhanced concrete powder compacting agent according to claim 1, characterized in that the modified silicon powder is ammonium humate modified silicon powder.
3. The non-toxic modified silicon powder enhanced concrete powder compacting agent according to claim 2, wherein the preparation method of the ammonium humate modified silicon powder comprises the following steps:
s1: dispersing 1 part of silicon powder in 50-120 parts of deionized water, and performing ultrasonic dispersion for 20-45min;
s2: adjusting the pH value to 1-2;
s3: stirring and dripping 4-6 parts of ammonium humate aqueous solution at room temperature, and carrying out modification reaction for 24 hours;
s4: washing the product of the S3 to neutrality by using absolute ethyl alcohol and deionized water;
s5: drying in a vacuum drying oven at 50-70 ℃ for 48 hours to obtain the modified silicon powder.
4. The preparation method of the nontoxic modified silicon powder reinforced concrete powder compacting agent according to claim 3, characterized by comprising the following steps:
t1: selecting modified silicon powder in a carrier, and crushing for 5-10min by using an electromagnetic crusher;
t2: and sequentially adding ethylenediamine acetate, sodium aminotriacetate and sodium aminotrimethylenephosphonate according to the proportion, blending for 10-20min, standing for 24 h, and cooling to obtain the concrete powder compacting agent.
5. The reinforced concrete powder compacting agent of claim 1, wherein the carrier is one of fly ash, mineral powder, stone powder, zeolite powder or a combination thereof.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886474A (en) * | 2010-06-29 | 2010-11-17 | 江苏省水利科学研究院 | Construction method for densifying surface layer of middle/low-strength concrete |
| CN105036587A (en) * | 2015-09-06 | 2015-11-11 | 山东宏艺科技股份有限公司 | High-performance concrete synergist and preparing method thereof |
| CN110498892A (en) * | 2019-07-06 | 2019-11-26 | 王志胜 | A kind of preparation method of high-dispersibility nanometer silicon dioxide |
| WO2021105823A1 (en) * | 2019-11-26 | 2021-06-03 | Navoday Sciences Private Limited | Chemically processed mineral additive for increasing the durability of cement and concrete |
| CN113801499A (en) * | 2021-09-22 | 2021-12-17 | 广东石油化工学院 | Preparation method of silane quaternary ammonium salt modified nano silicon dioxide |
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- 2022-08-08 CN CN202210942173.XA patent/CN115321867B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886474A (en) * | 2010-06-29 | 2010-11-17 | 江苏省水利科学研究院 | Construction method for densifying surface layer of middle/low-strength concrete |
| CN105036587A (en) * | 2015-09-06 | 2015-11-11 | 山东宏艺科技股份有限公司 | High-performance concrete synergist and preparing method thereof |
| CN110498892A (en) * | 2019-07-06 | 2019-11-26 | 王志胜 | A kind of preparation method of high-dispersibility nanometer silicon dioxide |
| WO2021105823A1 (en) * | 2019-11-26 | 2021-06-03 | Navoday Sciences Private Limited | Chemically processed mineral additive for increasing the durability of cement and concrete |
| CN113801499A (en) * | 2021-09-22 | 2021-12-17 | 广东石油化工学院 | Preparation method of silane quaternary ammonium salt modified nano silicon dioxide |
Non-Patent Citations (1)
| Title |
|---|
| 陈志友等: "腐殖酸钠对石英分散性能影响的机理研究" * |
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