91 results about "Natural sand" patented technology

A bioenergy generator to increase the life force of a biological system is provided. The bioenergy generator includes fine pieces of natural stone, fine pieces of natural sand, fine pieces of metal, water and a supporting material operable to hold the natural sand, the natural stone, the metal, and the water together. Uses of the bioenergy generator are also provided, in particular, to enhance stem cell production.

The invention belongs to the technical field of building materials, and particularly relates to fan blade regenerated fiber-based high-solid-waste low-carbon concrete and a preparation method thereof, and the fan blade regenerated fiber-based high-solid-waste low-carbon concrete comprises the following raw materials by weight: 0.9-1.1 parts of an alkali-activated active precursor; 0.4 to 0.8 part of iron tailing sand; 0 to 1.1 parts of natural sand; 1.9 to 2.4 parts of recycled aggregate; 0.15 to 0.20 part of a composite alkali activator; 0.015 to 0.020 part of fan blade regenerated glass fiber; 0.001 to 0.003 part of a retarder; 0.35 to 0.45 part of water; wherein the alkali-activated active precursor is granulated blast furnace slag powder. The obtained concrete mixture is good in workability, the 28-day compressive strength reaches 40 MPa or above, the drying shrinkage rate is reduced by 30%-50% compared with that of traditional alkali-activated concrete, additional curing measures are not needed, the concrete mixture is particularly suitable for prefabricated parts such as curbs, sleepers and manhole covers, and a feasible technical path is provided for high-valued and large-scale utilization of bulk industrial solid waste.

The invention discloses an aramid fiber reinforced concrete material for a light sound barrier plate and a preparation method of the aramid fiber reinforced concrete material, and relates to the field of light building materials, and the aramid fiber reinforced concrete material is prepared from cement, fly ash, silica fume, quartz sand, light ceramsite, rubber fine sand, a water reducer, a fiber plasticizer, water and modified aramid fiber. The waste tire rubber powder is heated by using the aqueous alkali to prepare the fine rubber sand, so that exploitation of natural sand can be reduced, and energy conservation and emission reduction are realized. The interface bonding force between the modified aramid fiber and cement and other raw materials is enhanced, the acid and alkali resistance is high, the tensile strength of the concrete material can be improved, and the durability of the concrete performance under complex conditions is guaranteed.

The invention belongs to the technical field of concrete, and particularly provides anti-crack concrete and a preparation method thereof. The anti-crack concrete comprises the following components: cement, water, natural sand, broken stone, fly ash, a polycarboxylic acid water reducing agent, polypropylene fibers, montmorillonite and a core-shell anti-ultraviolet agent. The prepared concrete has the advantages of being high in ultraviolet resistance, excellent in crack resistance, high in durability and the like, and is suitable for outdoor scenes such as building outer walls, bridges and roads.

The invention belongs to the technical field of building materials, particularly relates to a preparation method of alkali activator activated fiber reinforced steel slag concrete, and aims to solve the problems that the steel slag concrete is low in early strength, insufficient in toughness and low in industrial solid waste synergistic utilization rate. According to the preparation method disclosed by the invention, a multi-source aggregate system is formed by the hot disintegration treated steel slag, the recycled coarse aggregate, the tailing sand and the natural sand; sodium silicate with the modulus of 1.0-1.5 and sodium carbonate / sodium hydroxide mixed alkali form a composite alkali activator; 1.0%-1.5% of corrugated steel fibers and 0.4%-0.6% of bunchy polypropylene fibers are doped to form a hybrid reinforcing system; the concrete is prepared through aggregate pre-wetting, staged stirring and a standard curing process. According to the method, the early strength and the fracture toughness can be remarkably improved, and efficient resource utilization of various industrial solid wastes is achieved.

The invention discloses a mortar fluidity evaluation model and a mix proportion inverse calculation method thereof, and belongs to the technical field of building materials.The method comprises the steps that aggregate comprehensive characteristic indexes are built by quantifying the stacking density, the specific surface area and grain shape correction parameters of aggregate; based on a cement paste volume balance principle, establishing a paste film thickness quantification model containing aggregate gap filling and surface wrapping; accurate evaluation of the fluidity is realized through a correlation model of the slurry film thickness and the mortar fluidity; and finally, based on the target fluidity, reversely deducing to obtain mortar mixing ratio parameters (water-cement ratio, mortar-sand ratio and the like) meeting the requirements. The method solves the problems that the traditional method cannot quantify the multi-feature coupling influence of the aggregate, the fluidity evaluation error is large, and the mix proportion design depends on experience, realizes the accurate prediction of the mortar fluidity and the efficient back-stepping of the mix proportion, is suitable for various aggregates such as natural sand, machine-made sand, shaping sand and the like, and provides a scientific basis for the mortar engineering application.

The invention relates to the technical field of building materials, and particularly discloses anti-crack bare concrete. The anti-cracking bare concrete is prepared from the following raw materials in parts by weight: 320 to 340 parts of cement, 48 to 52 parts of stone powder, 9 to 11 parts of silicon powder, 43 to 47 parts of an anti-cracking agent, 720 to 740 parts of natural sand, 730 to 750 parts of granite macadam with the particle size of 10 to 20 mm, 290 to 310 parts of granite macadam with the particle size of 5 to 10 mm, 150 to 160 parts of water and 9 to 11 parts of a polycarboxylate superplasticizer. Wherein the anti-cracking agent is prepared from the following raw materials: carbon nanofibers, phase change microcapsules, an ethylene-tetrafluoroethylene copolymer, hyperbranched polyester, a silane coupling agent and a nano silicon dioxide dispersion liquid. The anti-crack fair-faced concrete can be used for engineering scenes with requirements for apparent quality and durability, and has the advantages of long-acting crack resistance, high anti-permeability grade and excellent volume stability.

The utility model relates to the technical field of curbs, and discloses a high-quality sand-permeable horizontal curb which comprises a fabric layer, a base layer, an anti-collision buffer strip, an anti-freezing layer and a connecting rod, the fabric layer is fixed on the outer side of the base layer, the fabric layer is composed of modified epoxy resin and granite particles, an arc-shaped top is arranged at the top of the fabric layer, and the anti-collision buffer strip is arranged at the bottom of the arc-shaped top. An anti-freezing layer is fixed at the bottom of the base layer and is made of foam concrete, a plurality of first water-permeable holes are formed in the base layer, a plurality of second water-permeable holes are formed in the anti-freezing layer, the first water-permeable holes are aligned with the second water-permeable holes, and an anti-collision buffer strip is fixed on each of two side edges of the top of the fabric layer. The two ends of the connecting rod are each fixedly provided with two elastic blocking pieces, the elastic blocking pieces are made of spring steel, and the two ends of the base layer are each provided with a clamping groove used for allowing the connecting rod to be inserted. According to the utility model, mutual connection is stable; water permeability and drainage performance are good; the anti-collision performance and the anti-freezing performance are good.

The invention relates to the technical field of preparation of concrete, in particular to LC3-basalt fiber regenerated block concrete and a preparation method thereof.The preparation method comprises the following preparation steps that S1, LC3 cement, regenerated blocks, natural sand and gravel are poured into a stirrer to be subjected to uniform dry mixing, and a dry mixture is obtained; s2, adding water, a modified water reducer and a performance modifier into the dry mixture, performing wet mixing, uniformly scattering modified basalt fibers during wet mixing, and performing uniform stirring to obtain a wet mixture; and S3, pouring the wet mixture into a test mold, standing at room temperature, demolding, and curing for 26-28 days to obtain the LC3-basalt fiber regenerated block concrete. Through the synergistic effect of the modified basalt fiber, the modified water reducer and the performance modifier, the compressive strength, the strength retention rate after high temperature and the tensile strength of the concrete are remarkably improved, and chemical activation and densification after the regenerated block is added are achieved.

The invention relates to the technical field of building materials, and particularly discloses an anti-freezing concrete prefabricated part and a preparation method thereof, the anti-freezing concrete prefabricated part comprises the following raw materials by weight: 300-360 parts of cement, 40-60 parts of fly ash, 90-110 parts of mineral powder, 642-662 parts of natural sand, 1000-1100 parts of gravel, 7-9 parts of an additive, 150-170 parts of water, 0.5-1.5 parts of polypropylene glycol fiber, and 3-8 parts of phase change self-repairing microcapsules. The prepared anti-freezing concrete prefabricated part has the advantage of being good in anti-freezing performance.

The invention relates to the technical field of building materials, in particular to halloysite sea sand geopolymer mortar as well as a preparation method and application thereof. The halloysite sea sand geopolymer mortar is prepared from the following raw materials in parts by weight: 500 parts of a cementing material, 140 to 280 parts of natural sand, 420 to 560 parts of sea sand, 203 parts of an alkali activator, 1 part of halloysite nanotubes and 46 to 48 parts of water. The preparation method comprises the following steps: ultrasonically dispersing halloysite nanotubes in half of mixing water; mixing and stirring the alkali activator and the cementing material to prepare slurry; adding natural sand and sea sand, and stirring; and finally, adding the halloysite dispersion liquid and the residual water and stirring. And molding, vibrating and curing the obtained mixture to obtain a finished product. Through the synergistic effect of the halloysite nanotubes and the geopolymer system, on the premise that the sea sand is not desalted, high-proportion resource utilization of the sea sand is achieved, and the prepared mortar has excellent mechanical properties and chloride ion penetration resistance and is especially suitable for coastal and island engineering construction.

The application discloses a preparation method of mixed recycled aggregate concrete and the mixed recycled aggregate concrete. The preparation method comprises the following steps: preparing the mixed recycled aggregate concrete by using cement, mixed recycled aggregate, mixed sand, fly ash and an additive; the mixed recycled aggregate is prepared by mixing recycled aggregate and virgin aggregate; the mixed sand is prepared by mixing recycled fine particles and natural sand; and the mortar is prepared by using the mixed sand. The mass proportion of the recycled aggregate in the mixed recycled aggregate, the non-uniform coefficient of the mixed recycled aggregate, the grading coefficient and the void ratio of the mixed recycled aggregate are limited, so that the reasonable range of the non-uniform coefficient and the grading coefficient of the mixed recycled aggregate with large bulk density and small void ratio is determined, and the mixed sand is filled correspondingly, so that the mixed recycled aggregate concrete with high strength is prepared, the mixed recycled aggregate concrete replaces the pouring material of the high-performance concrete structure, and the application range of the recycled aggregate concrete is greatly widened.

To aim to effectively utilize components with phosphorus adsorption functions to efficiently, that is, with good yield, control the size of the resulting adsorption composite particles, ensure that there are no adsorption materials that do not contribute to internal adsorption, achieve cost-effectiveness, and obtain phosphorus adsorption composite particles with sufficient strength.SOLUTION: A coating layer made of a binder is applied to the surface of granular carriers, and an adsorbent is arranged on this coating layer to form adsorbent composite particles. As the granular carrier, natural sand or artificial sand can be used. As the binder, cement selected from Portland cement, blended cement, or special cement can be used. As the adsorbent, a material capable of adsorbing phosphorus components can be used.SELECTED DRAWING: None

This utility model relates to the field of paving brick technology and discloses a high-quality permeable paving brick made of natural sand, including a permeable skeleton layer, a bottom layer of high-quality natural sand permeable paving bricks at the bottom of the permeable skeleton layer, and a top layer of high-quality natural sand permeable paving bricks at the top of the permeable skeleton layer. In use, the corresponding conical drainage channels and through holes are coaxial and connected, achieving dual-effect permeability through siphoning and flushing. When water flows through the surface layer of the high-quality natural sand permeable paving bricks, the conical drainage channels increase the flow velocity and generate negative pressure suction. When the water flow is large, a high-speed jet forms in the channels to flush away sediment. The bricks are arranged in a honeycomb pattern during laying, and the corresponding arc-shaped male tenons and arc-shaped female tenons form an interlocking structure. The curved joints can automatically level the angle, and the interlocking structure increases the effective permeable joint width, thus improving permeability. The drainage channels in the interlocking area can form a dual drainage channel with the vertical infiltration holes.

The invention relates to the technical field of mortar and concrete preparation, in particular to a coal-fired furnace slag modification method and application thereof. According to the invention, the slag is subjected to crushing and screening, moisture content control, pore pre-filling of the fly ash-cement mixture, water addition and pre-mixing and coating, and modification treatment, such that the porosity of the slag is reduced, the fluidity of the slag is improved, and the mechanical property of the slag is significantly improved. Besides, the slag subjected to modification treatment is applied to production of mortar and concrete, 100% replacement of natural sand by the slag can be realized, the compressive strength of the mortar and the concrete can be greatly improved, and remarkable environmental protection and economic benefits are achieved.

This application belongs to the field of concrete technology, specifically providing a crack-resistant concrete and its preparation method. The crack-resistant concrete comprises the following components: cement, water, natural sand, crushed stone, fly ash, polycarboxylate superplasticizer, polypropylene fiber, montmorillonite, and a core-shell UV stabilizer. The concrete prepared by this application has advantages such as strong UV resistance, excellent crack resistance, and high durability, making it suitable for outdoor applications such as building exterior walls, bridges, and roads.

The application provides a preparation method of prefabricated new UHPC decorative hanging plate and application thereof, and belongs to the technical field of super high performance concrete products, and the preparation method comprises the following steps: S1, uniformly mixing cement 60-65 parts, modified perlite composite powder 4-6 parts, gravel 4-6 parts, natural sand 25-30 parts, water reducing agent 1.4-1.8 parts, defoaming agent 0.08-0.1 parts and water 17-22 parts according to weight parts, to obtain initial mixture; S2, putting steel wire short fibers 2-3 parts and styrene liquid core glass fibers 3-4 parts into the initial mixture obtained in S1 according to weight parts, uniformly mixing, to obtain UHPC material; S3, vibrating and pouring the UHPC material, vibrating for 26-30s at the same position, standard curing molding, after curing, demolding, and the prefabricated new UHPC decorative hanging plate is obtained. The application improves the frost resistance of the concrete while ensuring excellent crack resistance, and ensures that the prefabricated new UHPC decorative hanging plate can maintain excellent decorative effect for a longer time.

The invention is applicable to the technical field of solid waste resource utilization and novel building material preparation, and provides solid waste based lightweight fine-grained ceramsite as well as a preparation method and application thereof, and the ceramsite is prepared from titanium gypsum, iron tailing powder, a solid waste based cementing material, a chelating agent, a nanocrystalline nucleus early strength agent and mixing water according to a specific proportion. The preparation method comprises the following steps: dry mixing of raw materials, preparation of an additive solution, wet mixing, rolling granulation, normal-temperature curing, 60-95 DEG C low-temperature steam curing and drying. According to the invention, the titanium gypsum, the iron tailing powder and other low-value solid wastes are used as main raw materials, and the lightweight fine-grained ceramsite with small particle size, stable structure, low water absorption and low dry density is successfully prepared through an optimized ratio and a unique low-temperature steam curing process. The product can be used as a fine aggregate to be applied to plastering mortar, completely or partially replaces natural gravel, and the mechanical property and construction stability of the mortar are improved while the mortar capacity is reduced.

The present application relates to the technical field of building materials, and provides a rapid repair mortar based on desert sand interface functionalization and a preparation method thereof.The rapid repair mortar provided by the present application comprises cementitious materials, fine aggregate, water and additives, wherein the fine aggregate comprises mixed sand and ordinary sand, the mixed sand is obtained by compounding desert sand after grading with natural sand; and the additives comprise polymers, reinforcing fibers, admixtures, desert sand micro-fine powder interface functional material (S-AC) and salt environment controllable water release water-absorbing resin microgel (S-SAP). Through the synergistic effect of mixed sand grading reconstruction, S-AC interface functionalization and S-SAP controllable water release internal curing, the present application can simultaneously improve the workability, early strength, volume stability and salt freeze environment durability of the desert sand rapid repair mortar, thereby effectively solving the problems of salt influence, weak interface and early cracking when the desert sand is used for rapid repair materials, and having a wide application prospect.

The invention provides a resin emulsion building material, relates to the technical field of building materials, aims to solve the problem of poor comprehensive performance of existing building materials, and adopts the technical scheme that the resin emulsion building material comprises a resin emulsion and a primer, the resin emulsion is prepared from emulsion, a silicon solution, wollastonite, alcohol ester dodecyl carbonate, ethylene glycol, a thickening agent, purified water, a mildew preventive, a defoaming agent, a suspending agent and water; the primer is prepared from alkali-resistant emulsion, a silicon solution, wollastonite, alcohol ester dodecyl carbonate, ethylene glycol, a thickening agent, purified water, a mildew preventive, a defoaming agent, natural sand excavation, a sterilizing agent and a dispersing agent. After the polymeric material is dispersed, the paint has the comprehensive properties of tear resistance, alkali resistance, water resistance, high temperature resistance, temperature change resistance and the like, the situations of cracking, shelling and the like cannot occur even after long-time acid rain, solar ultraviolet irradiation or alkaline substance corrosion, a wall body is protected, and meanwhile, the service life of a coated building surface is prolonged.

The invention belongs to the technical field of building materials, and particularly relates to solid-waste-based self-stress concrete-filled steel tube and a preparation method thereof. The solid waste-based self-stress concrete filled steel tube is prepared from the following raw materials in percentage by mass: 60% of mineral powder, 30% of steel slag powder, 10% of fly ash, 6%-12% of an expanding agent, 4% of an alkali activator, 15% of steel slag fine aggregate, 20% of steel slag coarse aggregate, 15% of sand, 20% of gravel and the balance of water, totaling 100%. The steel slag is used for replacing natural sand and gravel and is supplemented with the expanding agent to form a self-stress concrete-filled steel tube material system, and the material system has the advantages of being environmentally friendly, high in self-stress, high in bearing capacity and the like. The material system also solves the problems that pores are generated between the concrete and the steel pipe due to self-shrinkage of the concrete, voids are formed, and the overall working performance is influenced.

The invention relates to the technical field of construction waste recycling, in particular to a stone-like PC brick prepared based on recycled concrete and a preparation method of the stone-like PC brick. The bottom layer is prepared from the following raw materials: recycled coarse aggregate, ordinary Portland cement, natural sand, composite modified recycled aggregate, fly ash, a polycarboxylate superplasticizer and water; the surface layer is prepared from the following raw materials: white Portland cement, colored sand, ferric oxide inorganic pigment, composite modified recycled aggregate, silica fume, acrylic emulsion and water; according to the technical scheme, an ultrasonic-microwave synergistic activation modification process is adopted, microwave can generate thermal stress by utilizing the electromagnetic performance difference between aggregate and attached mortar, more than 45% of old mortar is stripped, and meanwhile, ultrasonic waves form a micro-flow field in aggregate pores through a cavitation effect, so that the penetration depth of modification liquid is increased.

The invention discloses a batch scraping type sand-containing art coating with a crack effect and a preparation and construction method thereof, and belongs to the technical field of crack coatings. The coating is composed of a sand-containing primer and a scraping type crack finish, wherein silica sol and a coalescing agent are added into the sand-containing primer, so that the scraping type crack finish used based on the primer can obtain a crack effect with uniform size at the temperature of 10-35 DEG C. Natural sand with different particle sizes is selected and mixed with other raw materials in the batch scraping type crack finish paint, so that the uniformity after batch scraping and the uniformity degree of cracking are ensured.

The invention discloses a super-hydrophobic material based on retired wind power blade powder, a preparation method of the super-hydrophobic material and hydrophobic concrete containing the super-hydrophobic material. The super-hydrophobic material is obtained by adding retired wind power blade powder into absolute ethyl alcohol for ultrasonic dispersion and then sequentially adding water, a coupling agent, an alkanol mixture, a catalyst, a siloxane modifier and nano titanium dioxide for composite reaction, and the alkanol mixture is obtained by mixing n-hexane and isopropanol according to the volume ratio of 1: 1. The retired wind power blade powder is obtained by performing front-stage pretreatment, crushing, grinding, resin removal, grinding and grading on a retired wind power blade; the hydrophobic concrete is obtained by mixing the super-hydrophobic material with cement, natural coarse aggregate, natural sand, a water reducing agent and water. The super-hydrophobic material is obtained by modifying the retired wind power blade powder, and then is added into a concrete mixture, so that the impermeability of concrete can be effectively improved, and the durability of a concrete structure is greatly improved.

The invention relates to the technical field of geotechnical engineering and mining engineering, in particular to a rock-soil side slope multi-field coupling damage simulation test device which comprises a box body, a side slope is installed in the box body, the side slope is filled with natural sand, and a water level control unit is installed in the natural sand and used for constructing a directional seepage field from the natural sand to the side slope. Therefore, the formation and lifting height of underground water in the slope are controlled; a loading unit is arranged between the top end of the side slope and the inner top wall of the box body and is used for applying a real-time controllable axial load; an earthquake simulation unit is mounted at the side end of the box body and is used for applying a horizontal reciprocating earthquake load with an adjustable phase; a sliding unit is installed at the bottom of the box body and used for achieving low-resistance displacement of the box body under horizontal excitation. The water level control unit, the loading unit, the earthquake simulation unit and the sliding unit are used for simulating slope instability damage under the multi-factor coupling action of earthquake, water level change and overload, and the monitoring unit is used for monitoring and recording data in real time.

The invention discloses a UHPC decorative plate based on sand mold forming and a preparation method thereof, and belongs to the technical field of building materials and decorative products. According to the method, a sand mold with a specific formula is adopted to replace a traditional mold, and the sand mold is composed of sand, polyacrylamide, cellulose ether, bentonite, starch ether, sodium silicate, a dispersing wetting agent, a silane coupling agent and the like and has the advantages of being good in plasticity, high in stability and capable of being repeatedly used. The surface layer with natural sand texture and lasting color is formed by combining and molding the surface layer with an embossing template through scraping of a scraping plate and pouring or spraying a UHPC (Ultra High Performance Concrete) material on the surface of the surface layer. The method solves the problems that a traditional mold is high in cost, complex textures are difficult to realize, a decorative layer is easy to fade, the mold cannot be reused and the like, and realizes the production of a decorative cement product with the same service life of a decorative effect and a structure, green, low-carbon, high-efficiency and low-cost.

The invention provides a preparation method of solid waste-based artificial fish reef concrete based on steel slag and slag aggregate. The method comprises the following steps: obtaining steel slag fine aggregate; obtaining blast furnace heavy slag coarse aggregate; a cementing material is prepared; uniformly mixing the fine aggregate, the coarse aggregate and the cementing material according to a preset proportion, then adding the water and the additive, and then uniformly mixing again to prepare a uniform concrete mixture; the prepared concrete mixture is subjected to compact forming and curing hardening treatment, and the artificial fish reef concrete is prepared. The solid waste ratio of the artificial fish reef prepared in the invention exceeds 90%, and the test block shows excellent long-term mechanical properties, marine environment safety and biocompatibility. According to the method, large-scale consumption of bulk solid wastes such as the blast furnace slag and the steel slag can be achieved, mining of natural gravel in the artificial fish reef preparation process can be reduced, and the method has important significance on marine ecological environment restoration and natural resource protection.

The application relates to the technical field of concrete building material preparation, in particular to a fiber reinforced concrete based on building solid waste recycled aggregate and a preparation method thereof, which comprises the following preparation steps: S1. Recycled coarse aggregate, silica fume, rice husk ash and metakaolin are mixed and stirred according to proportions to obtain cement mixture; S2. The cement mixture obtained in the step S1 is calcined for 2-3 hours to obtain cement clinker; S3. The cement clinker obtained in the step S2, polypropylene-vinyl aramid mixed fiber, polycarboxylic acid water reducing agent, modified pouring agent and tetrasodium iminodisuccinate are mixed according to proportions, then poured into a stirrer and stirred for 5-8 minutes; and S4. Water is added into the stirrer according to a proportion, and the mixture is continuously stirred for 6-12 minutes and then taken out to obtain the fiber reinforced concrete based on the building solid waste recycled aggregate. The application utilizes the building solid waste recycled aggregate, reduces natural resource consumption, reduces the building waste landfill amount (1.5-2 tons of natural sand and stone mining can be reduced per ton of recycled aggregate), and meets the sustainable development concept.

The invention discloses a PIV (particle image velocimetry) flow field measurement method and device under the sediment starting critical condition of an accumulation body, the device is used for screening and dyeing natural sand, specular reflection of the natural sand under laser irradiation is remarkably reduced, and the recognition signal-to-noise ratio of tracer particles in a PIV image is greatly improved. The image recognition precision is improved, and a foundation is laid for subsequent high-precision flow field measurement. Based on a two-dimensional instantaneous velocity field obtained by PIV, a distribution nephogram and an on-way change curve of the shear strain rate and the vertical vorticity are further deduced; the parameters can intuitively reflect the shear strength and vortex structure of water flow near the slope surface of the accumulation body, and reveal the internal relation between sediment starting and the scouring pit form. The method is specially designed for a permeable accumulation body model, a permeable bank slope is built by adopting a dyed sand pile, and the permeation and streaming coupling effect of water flow in an accumulation body is truly simulated. A key section of a slope is vertically illuminated by laser sheet light, and a high-speed camera is combined for synchronous acquisition, so that refined capture of a complex flow field structure is realized.

The invention discloses a sand grain high-temperature heat storage and energy storage system and a heat storage and energy storage method, and relates to the technical field of electric heat storage. Natural sand grains are adopted as a main heat accumulator and are filled in a container after being pretreated; heat energy input is conducted on sand grains through electric heating assemblies and a steam heating coil, the electric heating assemblies are arranged in a sand grain heat storage body in a layered mode, and the steam heating coil is arranged upwards from the bottom in a circuitous mode. The water supply pipeline is connected with an external heat supply pipeline to form a heat release coil pipe, and cold water is heated into hot water or steam to be output in the heat release stage. The electric heating assemblies are arranged between the adjacent heating or heat release coil pipes in a penetrating mode to form a space cooperative heat transfer structure, and the overall heat exchange uniformity and the energy utilization rate are improved. According to the sand grain high-temperature heat storage and energy storage system, steam heat energy is stored in the sand grain heat storage body, the heat energy is stored in combination with electric heating, and dynamic storage of heat can be achieved. The sand heat storage device has the advantages of being low in heat storage cost, stable in physical performance and easy to install and pour on site.