CN114261007A - Concrete surface functional recombination material and use method thereof - Google Patents
Concrete surface functional recombination material and use method thereof Download PDFInfo
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- CN114261007A CN114261007A CN202111565439.5A CN202111565439A CN114261007A CN 114261007 A CN114261007 A CN 114261007A CN 202111565439 A CN202111565439 A CN 202111565439A CN 114261007 A CN114261007 A CN 114261007A
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Abstract
The invention discloses a concrete surface functional recombination material and a use method thereof. The recombination material comprises the following components in percentage by mass: 60-80% of functionalized nano material, 10-20% of active excitation material, 5-15% of ultraviolet curing material and the balance of water; wherein the functionalized nano material is a hydrophobic silicon dioxide/mesoporous zirconium dioxide composite nano material. The using method comprises the following steps: and (3) polishing the roughened concrete surface by taking the functionalized recombined material on the concrete surface as a polishing material, and then curing by irradiation under ultraviolet light to form a protective film. This reorganization material, for stable turbid liquid at normal temperature, can effectively polish concrete surface structure, can construct the one-way concrete of one deck hydrophobic after the construction on the concrete surface, and extremely firm concrete protection architecture, the pollution problem of having solved concrete surface structure simultaneously and polishing and produce a large amount of dust fundamentally, high efficiency and environmental protection.
Description
Technical Field
The invention relates to the technical field of concrete and cement products, in particular to a concrete surface functional recombinant material and a using method thereof.
Background
With the increasingly wide application of concrete materials, the properties of rain erosion resistance, acid rain corrosion resistance and the like are also continuously concerned. As is known, concrete is an inorganic non-metallic material with very easy water seepage due to its hydrophilic surface and a large number of pores in the interior, and a large number of harmful substances in water can have a fatal influence on the durability of concrete, especially for large underground engineering, roof engineering, exterior wall surface engineering, etc.
At present, the traditional surface protective coating such as asphalt, polyurethane, resin and the like constructs a layer of compact membrane structure on the surface of concrete, but the structure is easy to break when the internal moisture is discharged outwards, the functionality of the coating can also disappear quickly, and the surface protective coating has limited adhesive capacity and can also be separated from the surface of the concrete quickly after cracks are formed on the surface.
In the existing research, silane is a high-permeability waterproof material and is a 4 th-generation organic silicon waterproof material, so that on one hand, the silane can block the permeation of aggressive ions and block the attachment of organic microorganisms, thereby reducing the corrosion of organic acid secreted by the silane to buildings; on the other hand, the inorganic pollutants can be taken away by means of rainwater washing, and the problem that the high-rise building is difficult to manually clean is solved. The silane is sprayed on the concrete surface in the form of solution, emulsion or paste, which can solve the problem of poor durability of the traditional surface protective coating at a certain layer degree, but the capability of adhering to the concrete surface is still limited.
CN111040625A discloses a super-hydrophobic coating, which is added with organosilane, inorganic nano-material and emulsifier, and the super-hydrophobic coating forms a micro-nano mixed microstructure in foam concrete by controlling the mass ratio of each component, and although the hydrophobic material has the effect of increasing the contact angle of the concrete surface, the construction of the hydrophobic material needs a soaking mode, and the hydrophobic material is not suitable for a conventional concrete structure. In addition, because the surface structure is not polished flat, the appearance and functionality are greatly compromised.
Therefore, there is a need for a composite nanomaterial with surface functionalization recombination, which can construct a layer of unidirectional concrete hydrophobic and extremely stable concrete protection structure on the concrete surface after construction.
Disclosure of Invention
The invention mainly aims to provide a concrete surface functional recombination material and a using method thereof aiming at the defects in the prior art. The concrete surface functional recombination material is stable turbid liquid at normal temperature, can effectively polish a concrete surface structure, and can construct a layer of unidirectional concrete hydrophobic and extremely stable concrete protection structure on the concrete surface after construction. The concrete surface material that the work progress effectively utilized and polished off, the remaining activity of the original material in make full use of surface to fundamentally solved the concrete surface structure and polished the pollution problem that produces a large amount of dusts, high efficiency and environmental protection.
In order to solve the technical problems, the invention adopts the following technical scheme:
the concrete surface functional recombination material is provided, and comprises the following components in percentage by mass: 60-80% of functionalized nano material, 10-20% of active excitation material, 5-15% of ultraviolet curing material and the balance of water; wherein the functionalized nano material is a hydrophobic silicon dioxide/mesoporous zirconium dioxide composite nano material.
According to the scheme, the concrete surface functional recombinant material comprises the following components in percentage by mass: 65-75% of functionalized nano material, 12-18% of surface residual substance active excitation material, 8-12% of ultraviolet curing material and 5% of residual water.
According to the scheme, in the hydrophobic silicon dioxide/mesoporous zirconium dioxide composite nano material, the hydrophobic silicon dioxide is nano silicon dioxide treated by organic silane, and the specific surface area of the nano silicon dioxide is 100-200m2(ii)/g; the mesoporous zirconia has the aperture of 5-50nm and the particle size of 2000-10000 meshes.
According to the scheme, in the hydrophobic silicon dioxide/mesoporous zirconium dioxide composite nano material, the hydrophobic silicon dioxide is uniformly loaded in the mesoporous zirconium dioxide.
According to the scheme, in the hydrophobic silicon dioxide/mesoporous zirconium dioxide composite nano material, the mass ratio of the hydrophobic silicon dioxide to the mesoporous zirconium dioxide is 5-6: 1.
According to the scheme, the preparation of the hydrophobic silicon dioxide/mesoporous zirconium dioxide composite nano material comprises the following steps:
1) using non-ionic polyacrylamide and water-dispersed hydrophobic nano-silica, grinding and dispersing to obtain a hydrophobic nano-silica dispersion liquid;
2) adding mesoporous zirconium dioxide into the dispersion liquid obtained in the step 1), and grinding and dispersing to obtain the hydrophobic silicon dioxide/mesoporous zirconium dioxide composite nano material.
Preferably, in the step 1), the mass ratio of the hydrophobic nano-silica to the nonionic polyacrylamide to the water is 100:1-2: 4-6.
Preferably, in the step 1), the grinding dispersion time is 0.5-1.5 h; in the step 2), the grinding dispersion time is 0.5-1.5 h.
According to the scheme, the active excitation material is one or more of calcium oxide, calcium chloride and calcium hydroxide. The reactive excitation material may activate surface remnants abraded from the concrete surface.
According to the scheme, the ultraviolet curing material is at least one of (2,4, 6-trimethylbenzoyl) ethyl phosphonate and (2,4, 6-trimethylbenzoyl) phosphine oxide.
According to the scheme, the solid content of the concrete surface functional recombinant material is adjusted to 50-80% by adding water.
According to the scheme, the preparation method of the concrete surface functional recombinant material comprises the following steps: and uniformly mixing the functionalized nano material, the active excitation material, the ultraviolet curing material and water according to mass fraction. Preferably, water is added to adjust the solids content to 50-80%.
Provides the application of the concrete surface functional recombinant material in the aspect of concrete surface protection.
According to the scheme, the concrete surface functional recombination material is used as a polishing material to polish the roughened concrete surface, and then the concrete surface is irradiated under ultraviolet light to be cured to form the protective film.
The application method of the concrete surface functional recombination material comprises the following steps:
1) performing napping treatment on the formed concrete until the surface is rough and flat;
2) grinding the concrete subjected to napping treatment in the step 1) by using a non-dust-absorption concrete surface grinding machine, wherein the concrete surface functional recombinant material is used as a grinding material;
3) and (4) further curing by using ultraviolet irradiation for 2-3h after grinding treatment, and using after curing.
According to the scheme, the addition amount of the functionalized recombination material on the surface of the concrete is 800-2。
According to the scheme, the formed concrete in the step 1) is formed into 20-28d concrete.
The invention provides a concrete surface functional recombination material, which comprises a functional nano material, an active excitation material and an ultraviolet curing material, and can be used for protecting the concrete surface; wherein: the functionalized nano material is a hydrophobic silicon dioxide/mesoporous zirconium dioxide composite nano material, the hydrophobic silicon dioxide is uniformly loaded in the mesoporous zirconium dioxide, the hydrophobic nano silicon dioxide provides a large amount of hydrophobic molecules to improve the waterproof performance of the surface of concrete, and the mesoporous zirconium dioxide has high wear resistance and can polish the surface of the concrete and form a flat surface with certain roughness to further enhance the hydrophobicity; the recombination material is turbid liquid and can adsorb and wrap concrete dust generated by grinding when the recombination material is used for grinding the surface of concrete, so that pollution caused by the dust is prevented, and on the other hand, the concrete dust is quickly formed into a film and fixed on the surface of the concrete by utilizing an active excitation material and an ultraviolet curing material, so that a formed protective layer structure is connected with the concrete into a whole, the stability of the structure is ensured, and the effect is far higher than that of simple smearing; meanwhile, the polished surface with roughness can also enhance the bonding force between the protective layer structure and the concrete. And after construction, a layer of one-way concrete hydrophobic and extremely stable concrete protection structure is reconstructed on the surface of the concrete.
The invention has the beneficial effects that:
1. when the concrete surface functional recombination material provided by the invention is used for protecting the concrete surface, the hydrophobic property of the concrete surface can be obviously improved, the surface contact angle is increased to 160-175 degrees, the water on the concrete surface is effectively prevented from permeating inwards, and the concrete surface is protected from being eroded by external harmful ions; in addition, for the outer wall structure, rainwater and the like can roll outside to take away dust on the surface, and the self-cleaning function is achieved.
2. Active excitation material and ultraviolet curing material among the recombination material, the concrete powder that the make full use of process of polishing produced forms the membrane at the concrete surface fast, prevents to polish on the one hand and produces the pollution that the dust caused, and on the other hand makes the protective layer structure that forms and concrete be linked into an organic whole, has guaranteed the stability of structure.
3. The concrete surface functional recombination material provided by the invention has the advantages of simple components, high efficiency and easy implementation of construction mode, short construction period, quick use after construction, shortened construction period, environmental friendliness, no secondary pollution and suitability for large-scale popularization and application.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
Example 1
The preparation and use method of the concrete surface functional recombination material comprises the following steps:
1) weighing 100g of hydrophobic silicon dioxide, 1.5g of nonionic polyacrylamide and 5g of deionized water, grinding and dispersing for 1h, and then adding 20g of mesoporous zirconium dioxide, grinding and dispersing for 1h, wherein the hydrophobic silicon dioxide is nano silicon dioxide treated by organosilane, and the specific surface area of the nano silicon dioxide is 150 +/-50 m2The pore diameter of the mesoporous zirconium dioxide is 5-50nm, and the pore diameter is 2000-10000 meshes, so that the functionalized nano material is obtained.
2) Weighing 10g of calcium oxide, calcium chloride and calcium hydroxide respectively, and uniformly mixing to obtain the surface residual substance activity excitation material.
3) According to the mass ratio of 60: 20: 15 the functionalized nanomaterial 60g, the active excitation material 20g, the ethyl (2,4, 6-trimethylbenzoyl) phenylphosphonate and the phosphine oxide (2,4, 6-trimethylbenzoyl) 7.5g each, and water 5g were mixed uniformly, the solid content was measured, and water was added to adjust the solid content to 70%.
4) Performing roughening treatment on the surface of the formed 28d concrete by using a concrete surface roughening machine until the surface is rough and flat, and then performing grinding treatment on the concrete by using a non-dust-absorption type concrete surface grinding machine, wherein the prepared concrete surface functional recombinant material is added as a grinding material, and the addition amount is 800g/m2(ii) a And (4) after the treatment is finished, further curing by using ultraviolet light for 2h, and then curing.
The contact angle of the samples was measured using a contact angle meter (OCA20 machine Data-Physics) and again after 0.5h sanding, the results of which are given in Table 1.
Example 2
Preparing a functional nano material and a surface residual substance active excitation material according to reference example 1, adjusting the mass ratio of water in the functional nano material, the active excitation material and the ultraviolet curing material to 70: 15: 10: 5.
the contact angle of the samples was measured using a contact angle meter (OCA20 machine Data-Physics) and again after 0.5h sanding, the results of which are given in Table 1.
Example 3
Preparing a functional nano material and a surface residual substance active excitation material according to reference example 1, adjusting the mass ratio of water in the functional nano material, the active excitation material and the ultraviolet curing material to 80: 10: 5: 5.
the contact angle of the samples was measured using a contact angle meter (OCA20 machine Data-Physics) and again after 0.5h sanding, the results of which are given in Table 1.
Comparative example 1
The concrete surface was not subjected to any treatment.
The contact angle of the samples was measured using a contact angle meter (OCA20 machine Data-Physics) and again after 0.5h sanding, the results of which are given in Table 1.
Comparative example 2
Spraying 800g/m on the concrete surface2And (3) carrying out natural air drying on the hydrophobic nano silicon dioxide coating sold in the market.
The contact angle of the samples was measured using a contact angle meter (OCA20 machine Data-Physics) and again after 0.5h sanding, the results of which are given in Table 1.
As can be seen from table 1, the contact angles measured for the first time in examples 1 to 3 and comparative example 2 are significantly improved compared to the untreated concrete surface, the contact angles measured for the second time after grinding in examples 1 to 3 are significantly improved compared to comparative example 2, and the performance loss of comparative example 2 after secondary grinding is very significant. As a result, the invention can construct a layer of stable hydrophobic structure on the surface of the lifting concrete, and the structure is integrated with the surface of the concrete and has high durability.
TABLE 1 contact Angle test results for examples 1-3 and comparative examples 1-2
It is apparent that the above embodiments are only examples for clearly illustrating and do not limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are therefore intended to be included within the scope of the invention as claimed.
Claims (10)
1. The concrete surface functional recombination material is characterized by comprising the following components in percentage by mass: 60-80% of functionalized nano material, 10-20% of active excitation material, 5-15% of ultraviolet curing material and the balance of water; wherein the functionalized nano material is a hydrophobic silicon dioxide/mesoporous zirconium dioxide composite nano material.
2. The concrete surface functional recombinant material as claimed in claim 1, wherein the hydrophobic silica/mesoporous zirconia composite nanomaterial is a nano silica treated with organosilane, and the specific surface area of the nano silica is 100-200m2(ii)/g; the mesoporous zirconia has the aperture of 5-50nm and the particle size of 2000-10000 meshes.
3. The concrete surface functionalized restructured material according to claim 1, wherein in the hydrophobic silica/mesoporous zirconia composite nanomaterial, the mass ratio of the hydrophobic silica to the mesoporous zirconia is 5-6: 1.
4. The concrete surface functionalized restructured material of claim 1, wherein the preparation of said hydrophobic silica/mesoporous zirconia composite nanomaterial comprises the steps of:
1) using non-ionic polyacrylamide and water-dispersed hydrophobic nano-silica, grinding and dispersing to obtain a hydrophobic nano-silica dispersion liquid; wherein the mass ratio of the hydrophobic nano silicon dioxide to the nonionic polyacrylamide to the water is 100:1-2: 4-6;
2) adding mesoporous zirconium dioxide into the dispersion liquid obtained in the step 1), and grinding and dispersing to obtain the hydrophobic silicon dioxide/mesoporous zirconium dioxide composite nano material.
5. The concrete surface functional recombinant material as claimed in claim 1, wherein the active excitation material is one or more of calcium oxide, calcium chloride and calcium hydroxide; the ultraviolet light curing material is at least one of (2,4, 6-trimethylbenzoyl) ethyl phosphonate and (2,4, 6-trimethylbenzoyl) phosphine oxide.
6. The concrete surface functional reforming material according to claim 1, wherein the solid content of the concrete surface functional reforming material is adjusted to 50 to 80% by adding water.
7. Use of the concrete surface functional restructuring material of any one of claims 1 to 6 for protecting a concrete surface.
8. The application of claim 7, wherein the application is that the concrete surface functionalized restructured material is used as a polishing material to polish the roughened concrete surface, and then the polishing material is irradiated under ultraviolet light to cure to form a protective film.
9. A method of using the concrete surface-functionalized regrouping material as claimed in any one of claims 1 to 6, comprising the steps of:
1) performing napping treatment on the formed concrete until the surface is rough and flat;
2) grinding the concrete after the napping treatment in the step 1) by using a non-dust-absorption concrete surface grinding machine, wherein the concrete surface functionalized recombined material of any one of claims 1 to 6 is used as a grinding material;
3) and (4) further curing by using ultraviolet irradiation for 2-3h after grinding treatment, and using after curing.
10. The use method of claim 9, wherein the addition amount of the concrete surface functional recombination material is 800-1000g/m2。
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