CN115974443A - Preparation method of multifunctional nano composite material for concrete - Google Patents
Preparation method of multifunctional nano composite material for concrete Download PDFInfo
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Abstract
The invention provides a preparation method of a multifunctional nano composite material for concrete, and relates to the technical field of concrete production. The preparation method of the nano composite material for the multifunctional concrete specifically comprises the following steps of S1, selecting raw materials, selecting a proper amount of propoxysilane and concentrated hydrochloric acid according to the quantity of the nano composite material to be prepared, selecting a proper amount of barren raw materials for standby, S2, hydrolyzing propoxysilane, S3, preparing silicon dioxide, S4, crushing and compounding the materials, and S5, granulating the materials. The preparation method is characterized in that propoxysilane and barren raw materials are used as raw materials for preparation, the propoxysilane is an industrial common raw material, feldspar, kaolinite, porcelain stone, talc and dolomite in the barren raw materials are common ore varieties in nature, and the raw materials all have a convenient acquisition mode, so that the whole production cost of the preparation method is favorably reduced, and the practicability and the economical efficiency of the preparation method are improved.
Description
Technical Field
The invention relates to the technical field of concrete production, in particular to a preparation method of a nano composite material for multifunctional concrete.
Background
Concrete is one of the most important civil engineering materials in the present generation, and is an artificial stone material prepared by a cementing material, granular aggregate, water, an additive and an admixture which are added if necessary according to a certain proportion, and the artificial stone material is formed by uniformly stirring, compacting, curing and hardening.
The existing preparation method of the nano composite material for concrete mostly adopts metal or metal compound to prepare the nano composite material, but has the problem of higher cost of obtaining and producing the metal or the metal compound, thereby leading to the poor practicability and economy of the existing preparation method, and meanwhile, after the existing nano composite material is added into the concrete, the mechanical property of the concrete can only be generally changed, and the integral functionality is single.
Disclosure of Invention
Solves the technical problem
Aiming at the defects of the prior art, the invention provides a preparation method of a multifunctional nano composite material for concrete, which solves the problems that the existing preparation method of the nano composite material for concrete has high raw material acquisition difficulty, high production cost, poor practicability and economy, and the prepared concrete has low durability, impermeability and poor corrosion resistance and expansibility.
Technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the preparation method of the nano composite material for the multifunctional concrete specifically comprises the following steps:
s1, selecting raw materials
Selecting a proper amount of propoxysilane and concentrated hydrochloric acid according to the amount of the nano composite material to be prepared, and selecting a proper amount of barren raw material for standby;
s2. Hydrolysis of propoxysilane
Adding propoxysilane into a reaction kettle, adding ultrapure water, stirring to completely dissolve the propoxysilane, closing the reaction kettle, heating to the reaction temperature, and keeping the reaction temperature until complete reaction;
s3. Preparation of silicon dioxide
After the reaction kettle is cooled to room temperature, opening the reaction kettle, slowly introducing concentrated hydrochloric acid with 22 percent of the total volume of the reaction liquid at a stable speed, adjusting the pH value of the reaction liquid to 3.0-4.0 to prepare a silicon dioxide suspension, introducing the silicon dioxide suspension into a spray granulator to prepare silicon dioxide crystal particles, and cleaning the prepared silicon dioxide crystal particles by using a soda solution with the concentration of 26 percent;
s4, material crushing and compounding
Respectively putting the silicon dioxide crystal and the barren raw material into a jet mill according to a certain proportion for crushing, and adding the crushed silicon dioxide powder and the barren raw material powder into an ultrasonic stirrer for uniformly mixing to obtain nano composite material powder;
s5, granulating materials
Putting the prepared nano composite material powder into a dry powder rolling granulator for granulation to prepare a nano composite material finished product, wherein the particle size of the finished product is controlled to be 0.05-0.01mm;
preferably, in the step S1, the barren raw material includes feldspar, kaolinite, porcelain stone, talc, and dolomite, and the mass ratio of the feldspar, kaolinite, porcelain stone, talc, and dolomite is 3:2:1:1:1.
preferably, in the S2, the reaction temperature is 90 ℃ and the reaction time is 30min.
Preferably, in S3, the rate of feeding concentrated hydrochloric acid to the reaction solution is 55ml/min.
Preferably, in S4, the size of the particle after the silica crystal is crushed is controlled to be 50-90 μm.
Preferably, in S4, the particle size of the lean raw material after pulverization is controlled to 30 to 50 μm.
Preferably, in the S4, the mass ratio of the silicon dioxide crystals to the barren raw material is 7:2.
preferably, when the material is used, the mass ratio of the portland cement to the finished nano composite material is 30:1.
advantageous effects
The invention provides a preparation method of a nano composite material for multifunctional concrete. The method has the following beneficial effects:
compared with the existing preparation method of the nano composite material, the preparation method adopts propoxysilane and barren raw materials as raw materials to prepare, the propoxysilane is an industrial common raw material, feldspar, kaolinite, porcelain stone, talc and dolomite in the barren raw materials are common ore varieties in nature, and all the raw materials have a convenient acquisition mode, so that the whole production cost of the preparation method is favorably reduced, and the practicability and the economy of the preparation method are improved.
Compared with the existing preparation method of the nano composite material, the preparation method of the nano composite material for the multifunctional concrete adopts silicon dioxide as a main body, and barren raw materials containing feldspar and kaolinite are added to prepare particles, the silicon dioxide as the main body can improve the overall strength of the concrete and improve the grading composition of the concrete, and the feldspar and the kaolinite can increase the viscosity of the concrete and improve the durability and impermeability of the concrete.
Compared with the existing preparation method of the nano composite material, the preparation method adopts silicon dioxide as a main body, and barren raw materials containing the porcelain stone, the talc and the dolomite are added to prepare particles, the addition of the porcelain stone can enhance the overall strength of the concrete, so that the concrete can obtain a main body with higher strength after being solidified, the concrete has certain corrosion resistance, meanwhile, the addition of the talc and the dolomite can enhance the water absorption of the concrete, and the concrete can obtain better expansion degree by matching with an additive.
Drawings
Fig. 1 is a table showing the concrete strength test according to the present invention.
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.
Example 1
The embodiment of the invention provides a preparation method of a multifunctional nano composite material for concrete, which comprises the following steps:
s1, selecting raw materials
Selecting a proper amount of propoxysilane and concentrated hydrochloric acid according to the amount of the nano composite material to be prepared, and selecting a proper amount of barren raw materials for later use, which is favorable for the subsequent hydrolysis treatment of the raw materials;
s2. Hydrolysis of propoxysilane
Adding propoxysilane into a reaction kettle, adding ultrapure water, stirring to completely dissolve the propoxysilane, closing the reaction kettle, heating to a reaction temperature, and keeping the reaction temperature to completely react, so as to be beneficial to ensuring that the propoxysilane is subjected to hydrolysis reaction fully;
s3. Preparation of silicon dioxide
After the reaction kettle is cooled to room temperature, opening the reaction kettle, slowly introducing concentrated hydrochloric acid with 22 percent of the total volume of the reaction liquid at a stable speed, adjusting the pH value of the reaction liquid to 3.0-4.0 to prepare a silicon dioxide suspension, introducing the silicon dioxide suspension into a spray granulator to prepare silicon dioxide crystal particles, and cleaning the prepared silicon dioxide crystal particles by using a soda solution with the concentration of 26 percent, so that the residual on the surface of the silicon dioxide crystal is favorably removed, and the purity of a finished product is improved;
s4, material crushing and compounding
Respectively putting the silicon dioxide crystal and the barren raw material into a jet mill according to a certain proportion for crushing, and adding the crushed silicon dioxide powder and the barren raw material powder into an ultrasonic stirrer for uniformly mixing to obtain nano composite material powder, which is beneficial to improving the mixing uniformity of the materials and improving the use effect of a finished product;
s5, granulating materials
The prepared nano composite material powder is put into a dry powder rolling granulator for granulation to prepare a nano composite material finished product, the grain size of the finished product is controlled to be 0.05-0.01mm, and the finished product can be better applied to concrete production.
Taking a proper amount of portland cement, adding the graded broken stone, the fine sand and the additive, adding the prepared nano composite material finished product according to a proportion, adding water for mixing to prepare concrete, and performing a concrete strength test, thereby being beneficial to realizing the use function of the finished product.
In S1, the barren raw materials comprise feldspar, kaolinite, porcelain stone, talc and dolomite, wherein the mass ratio of the feldspar, the kaolinite, the porcelain stone, the talc and the dolomite is 3:2:1:1:1, be favorable to promoting the result of use of barren raw materials, in S2, reaction temperature is 90 ℃, reaction time is 30min, be favorable to ensureing that the reaction goes on completely, in S3, the speed that lets in concentrated hydrochloric acid in the reaction solution is 55ml/min, be favorable to avoiding concentrated hydrochloric acid to let in fast, the reaction is too strong, take place danger, in S4, size control is at 50-90 mu m behind the granule after the silica crystal smashes, in S4, the size control of barren raw materials after smashing is at 30-50 mu m, be favorable to promoting the mixed effect of raw and other materials, in S4, the quality ratio of silica crystal and barren raw materials is 7:2, when the material is used, the mass ratio of the Portland cement to the nano composite material finished product is 30:1, the overall use strength of the concrete is favorably improved.
Comparative example 2:
the invention provides a preparation method of a multifunctional nano composite material for concrete, which comprises the following steps:
s1, selecting raw materials
Selecting a proper amount of propoxysilane and concentrated hydrochloric acid according to the amount of the nano composite material to be prepared, and selecting a proper amount of barren raw material for standby;
s2. Hydrolysis of propoxysilane
Adding propoxysilane into a reaction kettle, adding ultrapure water, stirring to completely dissolve the propoxysilane, closing the reaction kettle, heating to a reaction temperature, and keeping the reaction temperature until complete reaction;
s3. Preparation of silicon dioxide
After the reaction kettle is cooled to room temperature, opening the reaction kettle, slowly introducing concentrated hydrochloric acid with 22 percent of the total volume of the reaction liquid at a stable speed, adjusting the pH value of the reaction liquid to 3.0-4.0 to prepare silicon dioxide suspension, introducing the silicon dioxide suspension into a spray granulator to prepare silicon dioxide crystal particles, and cleaning the prepared silicon dioxide crystal particles by using a soda solution with the concentration of 26 percent;
s4, material crushing and compounding
Respectively putting the silicon dioxide crystal and the barren raw material into a jet mill according to a certain proportion for crushing, and adding the crushed silicon dioxide powder and the barren raw material powder into an ultrasonic stirrer for uniformly mixing to obtain nano composite material powder;
s5, granulating materials
And (3) putting the prepared nano composite material powder into a dry powder rolling granulator for granulation to prepare a nano composite material finished product, wherein the particle size of the finished product is controlled to be 0.05-0.01mm.
And taking a proper amount of portland cement, adding graded broken stone, fine sand and an additive, adding the prepared nano composite material finished product according to a proportion, adding water for mixing to prepare concrete, and performing a concrete strength test.
In S1, the barren raw materials comprise kaolinite, porcelain stone, talc and dolomite, and the mass ratio of the kaolinite, the porcelain stone, the talc and the dolomite is 2:1:1:1, S2, reaction temperature is 90 ℃, reaction time is 30min, in S3, the speed of introducing concentrated hydrochloric acid into the reaction liquid is 55ml/min, in S4, the particle size of the crushed silicon dioxide crystals is controlled to be 50-90 μm, in S4, the particle size of the crushed barren raw materials is controlled to be 30-50 μm, in S4, the mass ratio of the silicon dioxide crystals to the barren raw materials is 7:2, when the material is used, the mass ratio of the Portland cement to the nano composite material finished product is 30:1.
comparative example 3:
the invention provides a preparation method of a multifunctional nano composite material for concrete, which comprises the following steps:
s1, selecting raw materials
Selecting a proper amount of propoxysilane and concentrated hydrochloric acid according to the amount of the nanocomposite to be prepared, and selecting a proper amount of barren raw material;
s2. Hydrolysis of propoxysilane
Adding propoxysilane into a reaction kettle, adding ultrapure water, stirring to completely dissolve the propoxysilane, closing the reaction kettle, heating to the reaction temperature, and keeping the reaction temperature until complete reaction;
s3. Preparation of silicon dioxide
After the reaction kettle is cooled to room temperature, opening the reaction kettle, slowly introducing concentrated hydrochloric acid with 22 percent of the total volume of the reaction liquid at a stable speed, adjusting the pH value of the reaction liquid to 3.0-4.0 to prepare a silicon dioxide suspension, introducing the silicon dioxide suspension into a spray granulator to prepare silicon dioxide crystal particles, and cleaning the prepared silicon dioxide crystal particles by using a soda solution with the concentration of 26 percent;
s4, material crushing and compounding
Respectively putting the silicon dioxide crystal and the barren raw material into a jet mill according to a certain proportion for crushing, and adding the crushed silicon dioxide powder and the barren raw material powder into an ultrasonic stirrer for uniformly mixing to obtain nano composite material powder;
s5, granulating the material
And (3) putting the prepared nano composite material powder into a dry powder rolling granulator for granulation to prepare a nano composite material finished product, wherein the particle size of the finished product is controlled to be 0.05-0.01mm.
Taking a proper amount of portland cement, adding graded broken stone, fine sand and an additive, adding the prepared nano composite material finished product according to a proportion, adding water for mixing to prepare concrete, and carrying out a concrete strength test.
In S1, the barren raw materials comprise feldspar, porcelain stone, talc and dolomite, and the mass ratio of the feldspar to the porcelain stone to the talc to the dolomite is 3:1:1:1, S2, the reaction temperature is 90 ℃, the reaction time is 30min, in S3, the speed of introducing concentrated hydrochloric acid into the reaction liquid is 55ml/min, in S4, the particle size of the crushed silicon dioxide crystals is controlled to be 50-90 mu m, in S4, the particle size of the crushed barren raw material is controlled to be 30-50 mu m, in S4, the mass ratio of the silicon dioxide crystals to the barren raw material is 7:2, when the material is used, the mass ratio of the Portland cement to the nano composite material finished product is 30:1.
comparative example 4:
the invention provides a preparation method of a multifunctional nano composite material for concrete, which comprises the following steps:
s1, selecting raw materials
Selecting a proper amount of propoxysilane and concentrated hydrochloric acid according to the amount of the nanocomposite to be prepared, and selecting a proper amount of barren raw material;
s2. Hydrolysis of propoxysilane
Adding propoxysilane into a reaction kettle, adding ultrapure water, stirring to completely dissolve the propoxysilane, closing the reaction kettle, heating to a reaction temperature, and keeping the reaction temperature until complete reaction;
s3. Preparation of silicon dioxide
After the reaction kettle is cooled to room temperature, opening the reaction kettle, slowly introducing concentrated hydrochloric acid with 22 percent of the total volume of the reaction liquid at a stable speed, adjusting the pH value of the reaction liquid to 3.0-4.0 to prepare a silicon dioxide suspension, introducing the silicon dioxide suspension into a spray granulator to prepare silicon dioxide crystal particles, and cleaning the prepared silicon dioxide crystal particles by using a soda solution with the concentration of 26 percent;
s4, material crushing and compounding
Respectively putting the silicon dioxide crystal and the barren raw material into a jet mill according to a certain proportion for crushing, and adding the crushed silicon dioxide powder and the barren raw material powder into an ultrasonic stirrer for uniformly mixing to obtain nano composite material powder;
s5, granulating materials
And (3) putting the prepared nano composite material powder into a dry powder rolling granulator for granulation to prepare a nano composite material finished product, wherein the particle size of the finished product is controlled to be 0.05-0.01mm.
And taking a proper amount of portland cement, adding graded broken stone, fine sand and an additive, adding the prepared nano composite material finished product according to a proportion, adding water for mixing to prepare concrete, and performing a concrete strength test.
In S1, the barren raw materials comprise feldspar, kaolinite, talc and dolomite, and the mass ratio of the feldspar, the kaolinite, the talc and the dolomite is 3:2:1:1, S2, reaction temperature is 90 ℃, reaction time is 30min, in S3, the speed of introducing concentrated hydrochloric acid into the reaction liquid is 55ml/min, in S4, the particle size of the crushed silicon dioxide crystals is controlled to be 50-90 μm, in S4, the particle size of the crushed barren raw materials is controlled to be 30-50 μm, in S4, the mass ratio of the silicon dioxide crystals to the barren raw materials is 7:2, when the material is used, the mass ratio of the Portland cement to the nano composite material finished product is 30:1.
comparative example 5:
the invention provides a preparation method of a multifunctional nano composite material for concrete, which comprises the following steps:
s1, selecting raw materials
Selecting a proper amount of propoxysilane and concentrated hydrochloric acid according to the amount of the nanocomposite to be prepared, and selecting a proper amount of barren raw material;
s2. Hydrolysis of propoxysilane
Adding propoxysilane into a reaction kettle, adding ultrapure water, stirring to completely dissolve the propoxysilane, closing the reaction kettle, heating to a reaction temperature, and keeping the reaction temperature until complete reaction;
s3. Preparation of silicon dioxide
After the reaction kettle is cooled to room temperature, opening the reaction kettle, slowly introducing concentrated hydrochloric acid with 22 percent of the total volume of the reaction liquid at a stable speed, adjusting the pH value of the reaction liquid to 3.0-4.0 to prepare silicon dioxide suspension, introducing the silicon dioxide suspension into a spray granulator to prepare silicon dioxide crystal particles, and cleaning the prepared silicon dioxide crystal particles by using a soda solution with the concentration of 26 percent;
s4, material crushing and compounding
Respectively putting the silicon dioxide crystal and the barren raw material into a jet mill according to a certain proportion for crushing, and adding the crushed silicon dioxide powder and the barren raw material powder into an ultrasonic stirrer for uniformly mixing to obtain nano composite material powder;
s5, granulating materials
And (3) putting the prepared nano composite material powder into a dry powder rolling granulator for granulation to prepare a nano composite material finished product, wherein the particle size of the finished product is controlled to be 0.05-0.01mm.
And taking a proper amount of portland cement, adding graded broken stone, fine sand and an additive, adding the prepared nano composite material finished product according to a proportion, adding water for mixing to prepare concrete, and performing a concrete strength test.
In S1, the barren raw materials comprise feldspar, kaolinite, porcelain stone and dolomite, and the mass ratio of the feldspar, the kaolinite, the porcelain stone to the dolomite is 3:2:1:1, S2, reaction temperature is 90 ℃, reaction time is 30min, in S3, the speed of introducing concentrated hydrochloric acid into the reaction liquid is 55ml/min, in S4, the particle size of the crushed silicon dioxide crystals is controlled to be 50-90 μm, in S4, the particle size of the crushed barren raw materials is controlled to be 30-50 μm, in S4, the mass ratio of the silicon dioxide crystals to the barren raw materials is 7:2, when the material is used, the mass ratio of the portland cement to a finished product of the nano composite material is 30:1.
comparative example 6:
the invention provides a preparation method of a multifunctional nano composite material for concrete, which comprises the following steps:
s1, selecting raw materials
Selecting a proper amount of propoxysilane and concentrated hydrochloric acid according to the amount of the nano composite material to be prepared, and selecting a proper amount of barren raw material for standby;
s2. Hydrolysis of propoxysilane
Adding propoxysilane into a reaction kettle, adding ultrapure water, stirring to completely dissolve the propoxysilane, closing the reaction kettle, heating to the reaction temperature, and keeping the reaction temperature until complete reaction;
s3. Preparation of silicon dioxide
After the reaction kettle is cooled to room temperature, opening the reaction kettle, slowly introducing concentrated hydrochloric acid with 22 percent of the total volume of the reaction liquid at a stable speed, adjusting the pH value of the reaction liquid to 3.0-4.0 to prepare a silicon dioxide suspension, introducing the silicon dioxide suspension into a spray granulator to prepare silicon dioxide crystal particles, and cleaning the prepared silicon dioxide crystal particles by using a soda solution with the concentration of 26 percent;
s4, material crushing and compounding
Respectively putting the silicon dioxide crystal and the barren raw material into a jet mill according to a certain proportion for crushing, and adding the crushed silicon dioxide powder and the barren raw material powder into an ultrasonic stirrer for uniformly mixing to obtain nano composite material powder;
s5, granulating materials
And (3) putting the prepared nano composite material powder into a dry powder rolling granulator for granulation to prepare a nano composite material finished product, wherein the particle size of the finished product is controlled to be 0.05-0.01mm.
And taking a proper amount of portland cement, adding graded broken stone, fine sand and an additive, adding the prepared nano composite material finished product according to a proportion, adding water for mixing to prepare concrete, and performing a concrete strength test.
In S1, the barren raw materials comprise feldspar, kaolinite, porcelain stone and talc, and the mass ratio of the feldspar, the kaolinite, the porcelain stone and the talc is 3:2:1:1, S2, reaction temperature is 90 ℃, reaction time is 30min, in S3, the speed of introducing concentrated hydrochloric acid into the reaction liquid is 55ml/min, in S4, the particle size of the crushed silicon dioxide crystals is controlled to be 50-90 μm, in S4, the particle size of the crushed barren raw materials is controlled to be 30-50 μm, in S4, the mass ratio of the silicon dioxide crystals to the barren raw materials is 7:2, when the material is used, the mass ratio of the portland cement to a finished product of the nano composite material is 30:1.
the results of the experiments of example 1 and comparative examples 2 to 7 were recorded, and it can be seen from fig. 1 that the results of the experiment of example 1 have better performance in terms of corrosion resistance, permeation resistance, strength, aggregate gradation, expansion degree and durability.
Although the present invention has been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in the present invention without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The preparation method of the multifunctional nano composite material for concrete is characterized by comprising the following steps:
s1, selecting raw materials
Selecting a proper amount of propoxysilane and concentrated hydrochloric acid according to the amount of the nano composite material to be prepared, and selecting a proper amount of barren raw material for standby;
s2. Hydrolysis of propoxysilane
Adding propoxysilane into a reaction kettle, adding ultrapure water, stirring to completely dissolve the propoxysilane, closing the reaction kettle, heating to the reaction temperature, and keeping the reaction temperature until complete reaction;
s3. Preparation of silicon dioxide
After the reaction kettle is cooled to room temperature, opening the reaction kettle, slowly introducing concentrated hydrochloric acid with 22 percent of the total volume of the reaction liquid at a stable speed, adjusting the pH value of the reaction liquid to 3.0-4.0 to prepare a silicon dioxide suspension, introducing the silicon dioxide suspension into a spray granulator to prepare silicon dioxide crystal particles, and cleaning the prepared silicon dioxide crystal particles by using a soda solution with the concentration of 26 percent;
s4, material crushing and compounding
Respectively putting the silicon dioxide crystal and the barren raw material into a jet mill according to a certain proportion for crushing, and adding the crushed silicon dioxide powder and the barren raw material powder into an ultrasonic stirrer for uniformly mixing to obtain nano composite material powder;
s5, granulating materials
And (3) putting the prepared nano composite material powder into a dry powder rolling granulator for granulation to prepare a nano composite material finished product, wherein the particle size of the finished product is controlled to be 0.05-0.01mm.
2. The method for preparing a multifunctional nanocomposite for concrete according to claim 1, wherein the method comprises the following steps: in S1, the barren raw materials comprise feldspar, kaolinite, porcelain stone, talc and dolomite, wherein the mass ratio of the feldspar, the kaolinite, the porcelain stone, the talc and the dolomite is 3:2:1:1:1.
3. the method for preparing a multifunctional nanocomposite for concrete according to claim 1, wherein the method comprises the following steps: in the S2, the reaction temperature is 90 ℃ and the reaction time is 30min.
4. The method for preparing a multifunctional nanocomposite for concrete according to claim 1, wherein the method comprises the following steps: in S3, the rate of feeding concentrated hydrochloric acid into the reaction solution was 55ml/min.
5. The method for preparing a multifunctional nanocomposite for concrete according to claim 1, wherein: in S4, the size of the crushed silicon dioxide crystal particles is controlled to be 50-90 μm.
6. The method for preparing a multifunctional nanocomposite for concrete according to claim 1, wherein: in S4, the particle size of the barren raw material is controlled to be 30-50 μm after being crushed.
7. The method for preparing a multifunctional nanocomposite for concrete according to claim 1, wherein the method comprises the following steps: in S4, the mass ratio of the silicon dioxide crystals to the barren raw materials is 7:2.
8. the method for preparing a multifunctional nanocomposite for concrete according to claim 1, wherein the method comprises the following steps: when the material is used, the mass ratio of the Portland cement to the nano composite material finished product is 30:1.
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Application publication date: 20230418 |