Ultra-high performance concrete and preparation method and application thereof

Abstract

The application provides an ultra-high performance concrete and a preparation method and application thereof, relates to the technical field of the ultra-high performance concrete, and raw materials of the application include Portland cement, silica fume, metakaolin, quartz sand, limestone powder, a water reducing agent and basalt fiber.The application successfully develops the UHPC material with the ultra-high mechanical performance and the environmental protection self-cleaning function through a unique formula design and process control, and helps to improve the durability and the aesthetic appearance of the outer wall of a building, reduces the maintenance cost, and has remarkable social and economic benefits.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultra-high performance concrete, in particular to an ultra-high performance concrete, a preparation method and application thereof. BACKGROUND

[0002] Ultra-high performance concrete (UHPC) is widely used in bridge construction, wind turbine tower, marine structures, prefabricated components, military facility construction, and tunnel engineering. In addition, it is also used to make architectural decorative exterior wall panels, combining aesthetic value and structural integrity. The unique performance of ultra-high performance concrete enables it to achieve complex and innovative architectural design, making it an ideal choice for building unique and beautiful buildings.

[0003] Over time, the challenge faced by ultra-high performance concrete is that the diffusion and deposition of pollutants on its surface can severely affect its appearance and may lead to an increase in economic and material resources required for maintenance. Ultra-high performance concrete is prone to accumulate pollutants, which can cause a decrease in glossiness, an increase in stains, affect the visual effect, and increase the cost of later maintenance. On the other hand, most existing ultra-high performance concrete uses steel fibers for reinforcement and toughening, which is prone to steel fiber corrosion.

[0004] In addition, traditional curtain walls need to rely on external light sources for lighting at night, resulting in high energy consumption. Although there have been studies on self-cleaning coating technology for ordinary concrete, there are relatively few related studies on decorative ultra-high performance concrete. SUMMARY

[0005] In view of the above prior art, the present application provides an ultra-high performance concrete, a preparation method and application thereof.

[0006] The ultra-high performance concrete provided by the present application comprises the following raw materials: Portland cement, silica fume, metakaolin, quartz sand, limestone powder, water reducing agent, and basalt fiber.

[0007] Preferably, the Portland cement is 52.5R white Portland cement, with a specific gravity of 3100 kg / m 3 ; the silica fume has a specific gravity of 2200 kg / m 3 ; the metakaolin has a bulk density of 890 kg / m 3 and a specific gravity of 2100 kg / m 3 ; the maximum particle size of the quartz sand is less than 0.5 mm; and the limestone powder has a specific gravity of 2600 kg / m 3 .

[0008] Preferably, the water reducing agent is a polycarboxylic acid superplasticizer with a water-reducing rate of 40%.

[0009] Preferably, the basalt fiber has a length of 12 mm and a diameter of 0.6 mm, so that the chopped basalt fiber is used to replace the traditional copper-plated steel fiber as a reinforcing material.

[0010] The application also provides a preparation method of the super high performance concrete.

[0011] Step 1: prepare raw materials in parts by weight according to the following proportions: Portland cement 690-760 parts, silica fume 60-120 parts, metakaolin 60-120 parts, quartz sand in an appropriate amount, limestone powder 150-210 parts, water 162-198 parts, and water reducing agent 21-30 parts; the volume content of basalt fiber is 0.5-2%;

[0012] Step 2: after the Portland cement, silica fume, metakaolin, quartz sand, and limestone powder are weighed according to the above proportions, they are placed in a stirring pot and stirred at a speed of 90-120 r / min for 25-35 s to uniformly stir the dry powder and obtain a primary mixture; 1 / 2-2 / 3 of the water is added to the primary mixture, and the stirring is continued at a speed of 90-120 r / min for 25-35 s, while the remaining water and water reducing agent are added, the stirring speed is increased to 180-240 r / min, and the stirring is performed for 1-3 min to form a slurry, and the basalt fiber is added and stirred for 0.5-2 min to uniformly disperse the basalt fiber in the slurry, thereby preparing a super high performance concrete slurry.

[0013] The application also provides an application of the prepared super high performance concrete slurry in a super-hydrophobic self-cleaning self-luminous surface layer.

[0014] Step 1: polydimethylsiloxane is used to sample a biological surface (such as a lotus leaf or a butterfly wing) having a super-hydrophobic property, the micro-nano structure of the biological surface is copied onto a polydimethylsiloxane soft film by a pressing method, the polydimethylsiloxane soft film is attached to a mold, the super high performance concrete slurry prepared in claim 5 is poured into the mold, and the polydimethylsiloxane soft film is removed after curing, and the super high performance concrete is taken out after being dried for 26-30 days in a standard curing room and is ready for use;

[0015] Step 2: Disperse 0.6-1.8g of SiO2 nanoparticles, 0.6-1.8g of TiO2 nanoparticles, and 0.6-1.2g of strontium aluminate submicron particles in 100ml of ethanol for 18-22min, ultrasonic treatment for 8-12min, and homogenate treatment at 8000-12000r / min for 8-12min to form a SiO2-TiO2 nanoparticle suspension; slowly drop 20-30ml of polymethylhydrogen siloxane into the SiO2-TiO2 nanoparticle suspension, and magnetically stir for 30min or more to form a super-hydrophobic self-cleaning nanoparticle suspension;

[0016] Step 3: Spray the super-hydrophobic self-cleaning nanoparticle suspension from left to right at a speed of 4-6cm / s to the dried ultra-high performance concrete surface, keep the nozzle at a distance of at least 10cm from the ultra-high performance concrete surface, and solidify at room temperature for 2-4 days after the spraying process is completed.

[0017] Thus, a dual fractal structure composed of sub-millimeter structures and nanoscale roughness is formed on the surface of the solidified ultra-high performance concrete, ensuring hydrophobicity and self-luminosity. In addition, nanosilica and nanotitanium dioxide can promote cross-linking or covalent bonding between the ultra-high performance concrete substrate and the coating, thereby enhancing durability and protecting the concrete. The biomimetic super-hydrophobic surface micro-nano structure and the application of nanosilica and nanotitanium dioxide modified polymethylhydrogen siloxane hydrophobic substances in the superficial pores of the ultra-high performance concrete ensure the super-hydrophobicity and self-cleaning of the ultra-high performance concrete. The luminescent powder in the coating will perform long-lasting luminescence at night after absorbing solar radiation during the day, providing a potential energy-saving solution for nighttime lighting and a lasting visual appearance.

[0018] Preferably, the specific gravity of the polymethylhydrogen siloxane is 1100kg / m 3 .

[0019] Preferably, the purity of the SiO2 nanoparticles is 99.5%, the particle size range is 10-20nm, and the specific surface area is 220-280m 2 / g; the particle size of the TiO2 nanoparticles is 5-15nm, and the specific surface area is 100-120m 2 / g. Using nanosilica and titanium dioxide powders as admixtures to modify polymethylhydrogen siloxane as a super-hydrophobic agent can improve its ultraviolet light stability and enhance its photocatalytic degradation performance.

[0020] Preferably, the specific gravity of the strontium aluminate submicron particles is 3500-3800kg / m 3 , the 10min afterglow brightness is 200-720mcd / m 2 , and the 60min afterglow brightness is 50-105mcd / m2 The continuous light-emitting time is greater than 12 hours.

[0021] Compared with the prior art, the application has the following advantages:

[0022] 1. The application provides a brand-new ultra-high performance concrete formula, which adds supplementary cementitious materials such as Portland cement, microsilica and kaolin in a suitable proportion, optimizes the water-binder ratio to obtain a dense microstructure and high strength, and further adds a proper amount of basalt fiber to improve the toughness of the ultra-high performance concrete. On this basis, a biomimetic super-hydrophobic surface is created through surface treatment technology, so that the ultra-high performance concrete has excellent self-cleaning performance, prevents pollutants from adhering, maintains the surface gloss, and also can promote the catalytic decomposition of organic pollutants. At the same time, the application integrates self-luminous materials into the ultra-high performance concrete, so that the manufactured curtain wall panel can emit visible light at night after absorbing sunlight or ultraviolet light during the day, achieving the effect of self-illumination and reducing the energy consumption of night lighting.

[0023] 2. The application can 1) improve architectural aesthetics: the self-luminous ultra-high performance concrete can provide persistent, soft and energy-free night lighting effect, enrich the performance form of building facade, and enhance the artistic expression of buildings and the value of urban landscape. 2) Energy saving and environmental protection: reduce the frequency of manual cleaning and water resources through self-cleaning function, reduce power consumption through self-luminous characteristics, help to promote the sustainable development of the building industry, and meet the global trend of low-carbon environmental protection. 3) Enhance durability: the super-hydrophobic surface can effectively prevent pollutants from penetrating into the interior of the concrete, reduce chemical corrosion and freeze-thaw damage, prolong the service life of the ultra-high performance concrete curtain wall, and reduce maintenance costs.

[0024] 3. The application has excellent mechanical properties (more than 120 MPa), super-hydrophobic photocatalytic properties, wear resistance, water scouring resistance, acid and alkali resistance, ultraviolet light stability and self-luminous characteristics, can effectively prevent stains from penetrating and accelerate the decomposition of surface pollutants, and provide a potential night lighting energy saving solution and persistent visual appearance.

[0025] 4. The application successfully develops UHPC materials with ultra-high mechanical properties and environmental self-cleaning functions through unique formula design and process control, which helps to improve the durability and aesthetics of building exterior walls, reduce maintenance costs, and has significant social and economic benefits.

[0026] 5、The application has excellent mechanical properties, long-lasting self-cleaning ability and self-luminous characteristics, can effectively prevent stain penetration and accelerate the decomposition of surface contaminants, and provides potential night lighting energy-saving solutions and long-lasting visual appearance, and can be applied to the decoration and functional skin construction of high-end building curtain walls, bridges, tunnels and other engineering structures, which not only meets the structural safety requirements, but also realizes the goals of beauty, energy saving and environmental protection. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, purposes and effects realized by the application easy to understand, the application is further described below in combination with specific embodiments.

[0028] Embodiment 1: An ultra-high performance concrete, raw materials of which include: Portland cement, silica fume, metakaolin, quartz sand, limestone powder, water reducing agent, basalt fiber.

[0029] The Portland cement is 52.5R white Portland cement, the specific gravity of which is 3100kg / m 3 ; the specific gravity of the silica fume is 2200kg / m 3 ; the bulk density of the metakaolin is 890kg / m 3 , and the specific gravity is 2100kg / m 3 ; the maximum particle size of the quartz sand is less than 0.5mm; the specific gravity of the limestone powder is 2600kg / m 3 . The water reducing agent is polycarboxylic acid superplasticizer, and the water reducing rate is 40%. The length of the basalt fiber is 12mm, and the diameter is 0.6mm.

[0030] The preparation method of the ultra-high performance concrete comprises the following steps:

[0031] Step 1: Prepare raw materials in the following proportions by weight: 720 parts of Portland cement, 90 parts of silica fume, 90 parts of metakaolin, an appropriate amount of quartz sand, 180 parts of limestone powder, 162-198 parts of water, and 26 parts of water reducing agent; the volume content of basalt fiber is 1%;

[0032] Step 2: After the Portland cement, silica fume, metakaolin, quartz sand and limestone powder are weighed according to the above proportions and put into a stirring pot, they are stirred at a speed of 100r / min for 30s to uniformly stir the dry powder and obtain a preliminary mixture; 1 / 2 of the water is added to the preliminary mixture, and the stirring speed is continued at 100r / min for 30s, while the remaining water and water reducing agent are added, the stirring speed is increased to 210r / min, and the stirring is continued for 2min to form a slurry, and the basalt fiber is added and stirred for 1min to uniformly disperse the basalt fiber in the slurry, thereby preparing an ultra-high performance concrete slurry.

[0033] The method for preparing the super-hydrophobic self-cleaning self-luminous surface layer based on the super-high performance concrete slurry comprises the following steps:

[0034] Step 1: sampling from a biological surface with super-hydrophobic properties by using polydimethylsiloxane, copying the micro-nano structure of the biological surface to a polydimethylsiloxane soft film by means of imprinting, attaching the polydimethylsiloxane soft film to a mold, pouring the super-high performance concrete slurry prepared in claim 5 into the mold, vibrating and compacting, removing the polydimethylsiloxane soft film after solidification, and taking out the super-high performance concrete after 28 days of curing in a standard curing room for drying and standby;

[0035] Step 2: dispersing 1.2 g of SiO2 nanoparticles, 1.0 g of TiO2 nanoparticles and 0.9 g of strontium aluminate sub-micron particles in 100 ml of ethanol for 20 min, ultrasonic treatment for 10 min, and homogenate treatment at a speed of 10000 r / min for 10 min to form a SiO2-TiO2 nanoparticle suspension; slowly adding 25 ml of polymethylhydrosiloxane drop by drop into the SiO2-TiO2 nanoparticle suspension, and magnetically stirring for 35 min to form a super-hydrophobic self-cleaning nanoparticle suspension;

[0036] Step 3: spraying the super-hydrophobic self-cleaning nanoparticle suspension to the dried super-high performance concrete surface from left to right at a speed of 5 cm / s, keeping the distance between the nozzle and the super-high performance concrete surface at 12 cm, and completing the spraying process, and then curing at room temperature for 3 days to obtain the super-hydrophobic self-cleaning self-luminous surface layer.

[0037] The specific gravity of the polymethylhydrosiloxane is 1100 kg / m 3 . The purity of the SiO2 nanoparticles is 99.5%, the particle size range is 10-20 nm, and the specific surface area is 220-280 m 2 / g; the particle size of the TiO2 nanoparticles is 5-15 nm, and the specific surface area is 100-120 m 2 / g. The specific gravity of the strontium aluminate sub-micron particles is 3600 kg / m 3 , the 10 min afterglow brightness is 600 mcd / m 2 , the 60 min afterglow brightness is 90 mcd / m 2 , and the continuous light-emitting time is 15.

[0038] Example 2: a super-high performance concrete, raw materials of which comprise Portland cement, silica fume, metakaolin, quartz sand, limestone powder, water reducing agent and basalt fiber.

[0039] The specific gravity of the Portland cement is 3100 kg / m 3 ; and the specific gravity of the silica fume is 2200 kg / m3 ; the bulk density of the metakaolin is 890 kg / m 3 , the specific gravity is 2100 kg / m 3 ; the maximum particle size of the quartz sand is less than 0.5 mm; the specific gravity of the limestone powder is 2600 kg / m 3 . The water reducing agent is a polycarboxylic acid superplasticizer, and the water reducing rate is 40%. The basalt fiber has a length of 12 mm and a diameter of 0.6 mm.

[0040] The preparation method of the super high performance concrete comprises the following steps:

[0041] Step 1: prepare raw materials in parts by weight according to the following ratio: portland cement 690 parts, silica fume 120 parts, metakaolin 60 parts, quartz sand in an appropriate amount, limestone powder 210 parts, water 162 parts, and water reducing agent 30 parts; the volume content of basalt fiber is 0.5%;

[0042] Step 2: after the portland cement, silica fume, metakaolin, quartz sand, and limestone powder are weighed according to the above ratio, they are put into a stirring pot and stirred at a speed of 120 r / min for 25 s to uniformly stir the dry powder and obtain a primary mixture; 2 / 3 of the water is added to the primary mixture, and the stirring is continued at a speed of 120 r / min for 25 s, while the remaining water and the water reducing agent are added, the stirring speed is increased to 240 r / min, and the stirring is performed for 1 min to form a slurry, and then the basalt fiber is added and continuously stirred for 2 min to uniformly disperse the basalt fiber in the slurry, thereby preparing a super high performance concrete slurry.

[0043] The method for preparing a super-hydrophobic self-cleaning self-luminous surface layer based on the super high performance concrete slurry comprises the following steps:

[0044] Step 1: polydimethylsiloxane is used to sample a biological surface with super-hydrophobic properties, the micro-nano structure of the biological surface is copied onto a polydimethylsiloxane soft film by means of imprinting, the polydimethylsiloxane soft film is attached to a mold, the super high performance concrete slurry prepared in claim 5 is poured into the mold, and the super high performance concrete is removed after curing, and then the super high performance concrete is taken out and dried after being cured in a standard curing room for 30 days.

[0045] Step 2: 0.6 g of SiO2 nanoparticles, 1.8 g of TiO2 nanoparticles, and 0.6 g of strontium aluminate submicron particles are dispersed in 100 ml of ethanol for 22 min, ultrasonic treatment is performed for 8 min, and then homogenate treatment is performed at a speed of 12000 r / min for 8 min to form a SiO2-TiO2 nanoparticle suspension; 30 ml of polymethylhydrogen siloxane is slowly added dropwise to the SiO2-TiO2 nanoparticle suspension, and magnetic stirring is performed for 35 min to form a super-hydrophobic self-cleaning nanoparticle suspension.

[0046] Step 3: The super-hydrophobic self-cleaning nanoparticle suspension is sprayed from left to right at a speed of 4 cm / s to the air-dried ultra-high performance concrete surface, keeping the nozzle at a distance of 12 cm from the ultra-high performance concrete surface. After the spraying process is completed, it is cured at room temperature for 4 days.

[0047] The specific gravity of the polymethylhydrogen siloxane is 1100 kg / m 3 . The SiO2 nanoparticles have a purity of 99.5%, a particle size range of 10-20 nm, and a specific surface area of 220-280 m 2 / g. The TiO2 nanoparticles have a particle size of 5-15 nm and a specific surface area of 100-120 m 2 / g. The strontium aluminate sub-micron particles have a specific gravity of 3800 kg / m 3 , a 10 min afterglow brightness of 200 mcd / m 2 , a 60 min afterglow brightness of 50 mcd / m 2 , and a persistent luminescence time of 16 h.

[0048] Example 3: An ultra-high performance concrete, the raw materials of which include Portland cement, silica fume, metakaolin, quartz sand, limestone powder, water reducing agent, and basalt fiber.

[0049] The Portland cement is 52.5R white Portland cement with a specific gravity of 3100 kg / m 3 . The silica fume has a specific gravity of 2200 kg / m 3 . The metakaolin has a bulk density of 890 kg / m 3 and a specific gravity of 2100 kg / m 3 . The maximum particle size of the quartz sand is less than 0.5 mm. The limestone powder has a specific gravity of 2600 kg / m 3 . The water reducing agent is a polycarboxylic acid superplasticizer with a water-reducing rate of 40%. The basalt fiber has a length of 12 mm and a diameter of 0.6 mm.

[0050] The preparation method of the ultra-high performance concrete comprises the following steps:

[0051] Step 1: Prepare the raw materials in the following proportions by weight: 760 parts of Portland cement, 60 parts of silica fume, 120 parts of metakaolin, an appropriate amount of quartz sand, 150 parts of limestone powder, 198 parts of water, and 21 parts of water reducing agent. The volume content of basalt fiber is 2%.

[0052] Step 2: The silicate cement, silica fume, metakaolin, quartz sand, limestone powder are weighed according to the above ratio and put into a stirring pot, and stirred at a speed of 90 r / min for 35 s to uniformly stir the dry powder to obtain a preliminary mixture; 1 / 2 of the water is added to the preliminary mixture, and the stirring speed is continued at 90 r / min for 35 s, while the remaining water and water reducing agent are added, and the stirring speed is increased to 180 r / min for 3 min to form a slurry, and basalt fibers are added and continue to stir for 0.5 min to uniformly disperse the basalt fibers in the slurry, and an ultra-high performance concrete slurry is prepared.

[0053] The method for preparing the super-hydrophobic self-cleaning self-luminous surface layer based on the ultra-high performance concrete slurry comprises the following steps:

[0054] Step 1: The polydimethylsiloxane is used to sample the biological surface with super-hydrophobic properties, the micro-nano structure of the biological surface is copied onto the polydimethylsiloxane soft film by means of imprinting, the polydimethylsiloxane soft film is attached to a mold, the ultra-high performance concrete slurry prepared in claim 5 is poured into the mold, and the mold is vibrated and compacted, and after curing, the polydimethylsiloxane soft film is removed, the ultra-high performance concrete is moved to a standard curing chamber for curing for 26 days, and then taken out and dried for standby use.

[0055] Step 2: 1.8 g of SiO2 nanoparticles, 0.6 g of TiO2 nanoparticles, and 1.2 g of strontium aluminate submicron particles are dispersed in 100 ml of ethanol for 18 min, ultrasonic treated for 12 min, and then homogenized at a speed of 8000 r / min for 12 min to form a SiO2-TiO2 nanoparticle suspension; 20 ml of polymethylhydrogen siloxane is slowly added dropwise to the SiO2-TiO2 nanoparticle suspension, and magnetically stirred for 36 min to form a super-hydrophobic self-cleaning nanoparticle suspension;

[0056] Step 3: The super-hydrophobic self-cleaning nanoparticle suspension is sprayed from left to right at a speed of 6 cm / s to the dried ultra-high performance concrete surface, the distance between the nozzle and the ultra-high performance concrete surface is kept at 15 cm, and after the spraying process is completed, it is cured at room temperature for 2 days.

[0057] The specific gravity of the polymethylhydrogen siloxane is 1100 kg / m 3 The purity of the SiO2 nanoparticles is 99.5%, the particle size range is 10-20 nm, and the specific surface area is 220-280 m 2 / g; the particle size of the TiO2 nanoparticles is 5-15 nm, and the specific surface area is 100-120 m 2 / g. The specific gravity of the strontium aluminate submicron particles is 3500 kg / m 3 , and the 10 min afterglow brightness is 720 mcd / m 2, 60 min afterglow brightness is 105 mcd / m 2 , the continuous light emission time is 13 h.

[0058] The above is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure, direct or indirect application in other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A method for preparing a superhydrophobic self-cleaning self-luminous surface layer, characterized in that, It comprises the following steps: Step 1: sample the biological surface with super-hydrophobic properties by using polydimethylsiloxane, copy the micro-nano structure of the biological surface to the polydimethylsiloxane soft film by means of imprinting, attach the polydimethylsiloxane soft film to the mold, pour the ultra-high performance concrete slurry into the mold, compact it by vibrating, remove the polydimethylsiloxane soft film after solidification, and then move the ultra-high performance concrete to a standard curing room for curing for 26-30 days before taking it out for air drying and standby; Step 2: disperse 0.6-1.8g of SiO2 nanoparticles, 0.6-1.8g of TiO2 nanoparticles, and 0.6-1.2g of strontium aluminate submicron particles in 100ml of ethanol for 18-22min, ultrasonic treatment for 8-12min, and then homogenate treatment at a speed of 8000-12000r / min for 8-12min to form a SiO2-TiO2 nanoparticle suspension; slowly drop 20-30ml of polymethylhydrogen siloxane into the SiO2-TiO2 nanoparticle suspension, and magnetically stir for more than 30min to form a super-hydrophobic self-cleaning nanoparticle suspension; Step 3: spray the super-hydrophobic self-cleaning nanoparticle suspension to the surface of the air-dried ultra-high performance concrete at a speed of 4-6cm / s from left to right, keep the distance between the nozzle and the surface of the ultra-high performance concrete at least 10cm, and then solidify at room temperature for 2-4 days to obtain the super-hydrophobic self-cleaning ultra-high performance concrete. The raw materials of the ultra-high performance concrete include Portland cement, silica fume, metakaolin, quartz sand, limestone powder, water reducing agent, and basalt fiber, wherein the Portland cement accounts for 690-760 parts by weight, the silica fume accounts for 60-120 parts by weight, the metakaolin accounts for 60-120 parts by weight, the quartz sand is appropriate amount, the limestone powder accounts for 150-210 parts by weight, the water reducing agent accounts for 21-30 parts by weight, and the volume content of the basalt fiber is 0.5-2%.

2. The method for preparing the superhydrophobic, self-cleaning, and self-luminous surface layer as described in claim 1, characterized in that, The Portland cement is 52.5R white Portland cement, the specific gravity is 3100kg / m 3 ; the specific gravity of the silica ash is 2200kg / m 3 ; the bulk density of the metakaolin is 890kg / m 3 , the specific gravity is 2100kg / m 3 ; the maximum particle size of the quartz sand is less than 0.5mm; the specific gravity of the limestone powder is 2600kg / m 3 .

3. The method for preparing the superhydrophobic, self-cleaning, and self-luminous surface layer as described in claim 1, characterized in that, The water reducing agent is polycarboxylic acid superplasticizer, and the water reducing rate is 40%.

4. The method for preparing the superhydrophobic, self-cleaning, and self-luminous surface layer as described in claim 1, characterized in that, The length of the basalt fiber is 12mm, and the diameter is 0.6mm.

5. The method for preparing the superhydrophobic, self-cleaning, and self-luminous surface layer as described in claim 1, characterized in that, The preparation method of the ultra-high performance concrete slurry comprises the following steps: Step 1: prepare the raw materials according to the following proportions by weight: Portland cement 690-760 parts, silica fume 60-120 parts, metakaolin 60-120 parts, quartz sand appropriate amount, limestone powder 150-210 parts, water 162-198 parts, and water reducing agent 21-30 parts; the volume content of the basalt fiber is 0.5-2%; Step 2: weigh the Portland cement, silica fume, metakaolin, quartz sand, and limestone powder according to the above proportions and put them into a stirring pot, stir at a speed of 90-120r / min for 25-35s to uniformly stir the dry powder and obtain a preliminary mixture; add 1 / 2-2 / 3 of the water to the preliminary mixture, continue to stir at a speed of 90-120r / min for 25-35s, add the remaining water and water reducing agent, increase the stirring speed to 180-240r / min, and stir for 1-3min to form a slurry; add the basalt fiber and continue to stir for 0.5-2min to uniformly disperse the basalt fiber in the slurry, and then prepare the ultra-high performance concrete slurry.

6. The method for preparing the superhydrophobic, self-cleaning, and self-luminous surface layer as described in claim 1, characterized in that, The specific gravity of the polymethylhydrogen siloxane is 1100 kg / m 3 .

7. The method for preparing the superhydrophobic, self-cleaning, self-luminous surface layer as described in claim 1 or 6, characterized in that, The SiO2 nanoparticles have a purity of 99.5%, a particle size range of 10-20 nm, a specific surface area of 220-280 m 2 / g; the TiO2 nanoparticles have a particle size of 5-15 nm, a specific surface area of 100-120 m 2 / g.

8. The method for preparing the superhydrophobic, self-cleaning, self-luminous surface layer as described in claim 1 or 6, characterized in that, The specific gravity of the strontium aluminate submicron particles is 3500-3800 kg / m 3 The 10 min afterglow brightness is 200-720 mcd / m 2 The 60 min afterglow brightness is 50-105 mcd / m 2 The persistent luminescence time is greater than 12 h.