507 results about "Pervious concrete" patented technology

The invention relates to the technical field of concrete, in particular to luminous pervious concrete and a preparation method thereof. The luminous permeable concrete is prepared from the following raw materials in parts by mass: 280-300 parts of cement, 870-900 parts of interval grading coarse aggregate, 70-80 parts of modified luminous powder, 30-40 parts of fly ash, 4-6 parts of a water reducing agent, 20-30 parts of a water repellent agent, 30-40 parts of epoxy resin, 3-5 parts of a silane coupling agent and 90-100 parts of water, and the interval grading coarse aggregate is prepared by mixing coarse aggregate with a small particle size of 4.95-9mm and coarse aggregate with a large particle size of 12.5-10mm according to a mass ratio of 1: 2; the surface of the modified luminescent powder is coated with silicon dioxide sol, and sodium borate is added for heat-resistant treatment. The light-emitting water-permeable concrete has compressive strength and water permeability, the light-emitting property is stable, and the hydrophobic and oleophobic corrosion resistance in the concrete is good.

The invention discloses high-strength corrosion-resistant pervious concrete and a preparation method thereof, and belongs to the technical field of concrete. The concrete is prepared from the following raw materials in parts by weight: 200-300 parts of cement, 1000-1300 parts of coarse aggregate, 20-30 parts of a composite admixture, 10-20 parts of a reinforcing agent, 1-1.5 parts of a water reducing agent, 3-5 parts of an additive and 100-130 parts of water, the reinforcing agent is prepared from modified basalt fiber and styrene-acrylic emulsion according to the mass ratio of (8 to 10): 1; the additive is a SiO2 (at) PDA (at) zeolite composite material; the composite admixture is composed of fly ash and modified steel slag powder according to a mass ratio of 2: 1. According to the invention, by optimizing the proportion of a plurality of composite materials, the interface bonding property with a gel material matrix is improved, the mechanical property and durability are remarkably improved while the water permeability is maintained, and the corrosion resistance of the concrete matrix is enhanced.

The invention discloses a water-permeable concrete brick loaded with a metal-organic framework material and a preparation method of the water-permeable concrete brick. The method comprises the following steps: mixing a silicon-aluminum material and an alkali activator to prepare geopolymer slurry, adding an organic amine reagent, mixing, and uniformly stirring to obtain modified geopolymer slurry; aggregate is added into the modified geopolymer slurry, the mixture is uniformly stirred and then loaded into a test mold, the test mold is demolded after standing for 1-2 days, a geopolymer water-permeable concrete brick is obtained, a metal salt solution is uniformly sprayed to the geopolymer water-permeable concrete brick, and the geopolymer water-permeable concrete brick is taken out after being subjected to steam curing for 3-5 h; and uniformly spraying the organic ligand solution on the cured geopolymer water-permeable concrete brick, performing steam curing for 18-22 hours, taking out the geopolymer water-permeable concrete brick after curing, and drying the geopolymer water-permeable concrete brick in a drying oven at 80-120 DEG C for 20-30 hours to obtain the water-permeable concrete brick loaded with the metal-organic framework material. The pervious concrete brick prepared by the invention has better adsorption efficiency, and can play an excellent water purification function in practical application.

The invention discloses a permeable concrete pavement permeability testing device, which relates to the technical field of concrete testing, and comprises a sample upper fixing seat, a sample lower fixing seat, a sealing cover, a water collecting cover, a water storage pipe and a flow meter. A water supplementing pipe is arranged above the water storage pipe, a floating ball is arranged at the bottom end of the water supplementing pipe, a movable pipe is arranged at the top end of the floating ball through a connecting rod, and a fixed pipe is arranged on the outer side of the movable pipe; a flow guide groove and a connecting groove are formed between the movable pipe and the fixed pipe, when the floating ball moves downwards due to the fact that the liquid level in the water storage pipe is lowered, the flow guide groove is communicated with the connecting groove, water in the water supplementing pipe can enter the water storage pipe and the water collecting cover, then the porosity of a sample can be measured, and the water permeability performance of the sample under different stable water pressures can be tested. And support is provided for large-area construction of the pervious concrete, so that a better construction effect is achieved.

The invention relates to high-performance super sulfate cement-based pervious concrete and a preparation method thereof, and belongs to the technical field of solid waste building materials, the high-performance super sulfate cement-based pervious concrete comprises the following raw materials by weight: 75-105 parts of high temperature activated powder, 180-240 parts of slag, 15-30 parts of cement, 800-1100 parts of coarse aggregate, 100-120 parts of water, and 6-12 parts of a water reducer; the high-temperature activated powder comprises the following raw materials in parts by weight: 45-60 parts of sludge ash and 30-45 parts of gypsum. According to the high-performance super-sulfate cement-based pervious concrete and the preparation method, solid wastes such as slag and sludge are effectively treated, so that solid waste resources are recycled, land resource shortage caused by solid waste accumulation is reduced, the use of cement clinker is greatly reduced, and the performance of the high-performance super-sulfate cement-based pervious concrete is also provided.

The invention discloses a pervious concrete microstructure and water permeability prediction method based on artificial intelligence, and belongs to the technical field of pervious concrete performance prediction.The pervious concrete microstructure and water permeability prediction method comprises the steps that S1, a characteristic coarse aggregate particle three-dimensional geometric model data set library is established; s2, establishing an aggregate three-dimensional close packing model in the pervious concrete structure; s3, re-importing the aggregate three-dimensional close packing model into the image modeling software MIMICS, and reversely generating a two-dimensional cross-sectional image which is a coarse aggregate image; s4, constructing a pervious concrete microstructure prediction model by adopting an artificial intelligence method; s5, inputting the coarse aggregate image into the pervious concrete microstructure prediction model built in the step S4 to obtain a pervious concrete prediction image and porosity information; s6, establishing a connected pore model required by permeation to realize the prediction of the water permeability performance; according to the artificial intelligence-based pervious concrete microstructure and water permeability prediction method provided by the invention, refined prediction of the water permeability coefficient of the pervious concrete is realized.

The invention provides pervious concrete prepared from modified recycled aggregate and a nano-reinforced material, and relates to the technical field of building materials, the pervious concrete comprises recycled aggregate, a nano-reinforced material, a cement matrix, a water reducing agent, a surfactant and water, the recycled aggregate comprises waste concrete, tile waste, ceramic fragments and glass waste, and the nano-reinforced material comprises a water reducing agent, a surfactant and water. The modified recycled aggregate and the nanometer reinforcing material are adopted, particularly, after the surface of the recycled aggregate is subjected to acid etching and plasma treatment, the surface of the recycled aggregate is subjected to acid etching and plasma treatment, and the surface of the nanometer reinforcing material is subjected to acid etching and plasma treatment, so that the surface of the recycled aggregate is subjected to acid etching and plasma treatment, and the surface of the recycled aggregate is subjected to acid etching and plasma treatment; the bonding performance with a cement matrix is enhanced, and the mechanical property of the pervious concrete is remarkably improved. The modification treatment ensures that the pervious concrete can meet higher performance requirements in high-strength application scenes (such as heavy traffic roads).

The invention discloses recycled aggregate negative carbon pervious concrete and a preparation method thereof, and relates to the field of pervious concrete. The recycled aggregate negative carbon pervious concrete is prepared from the following components in parts by mass: 1186 to 1423 parts of recycled coarse aggregate, 54 to 68 parts of fine aggregate, 221 to 263 parts of cement, 147 to 175 parts of coal ash, 111 to 132 parts of water, 3.37 to 4.01 parts of a water reducing agent, 263 to 285 parts of special gel and 3.68 to 4.38 parts of bacterial powder. According to the recycled aggregate negative carbon pervious concrete, the surface of the recycled aggregate is wrapped with the specially-made gel, the bacterial powder with the biological enzyme catalysis function is introduced, the hardness of the recycled aggregate is improved, microcracks and pores are sealed, the mechanical property of the pervious concrete is effectively improved, the pervious concrete is endowed with the carbon absorption and fixation performance, and low-carbon environment-friendly production is achieved; the current environmental protection and dual-carbon concepts are met.

The invention discloses a pervious concrete reinforcing agent which is prepared from modified kaolin, a water-retaining agent, an active filler and a sodium lignin sulfonate aqueous solution according to the substance mass ratio of (4-7): 3: (2-5): 5. According to the pervious concrete reinforcing agent, the modified kaolin is matched with the water-retaining agent, the active filler and the sodium lignin sulfonate aqueous solution, the compressive strength performance and the wear resistance of a product are optimized through blending and coordination of the raw materials, coordinated improvement of water permeability, strength and wear resistance is achieved, and meanwhile the product is remarkable in anti-freezing and weather-resistant stability effect.

The invention relates to an ecological pervious concrete revetment and a construction method thereof. The ecological permeable concrete revetment comprises a plain soil base layer with a layered tamping structure, the plain soil base layer comprises an overwater part and an underwater part, and the part, on the overwater part, of the plain soil base layer has a drainage slope; the water-permeable concrete layer covers the plain soil base layer, and the surface of the water-permeable concrete layer is provided with uniform and fine galling textures; the pervious concrete layer comprises gravel aggregate with the particle size of 5mm-15mm and a cementing material; wherein the cementing material comprises ordinary Portland cement and fly ash in a weight ratio of 17: 3, as well as a water reducing agent and an air entraining agent, and the water-cement ratio of the cementing material is 0.27-0.29; and the protective layer covers the pervious concrete layer. By means of the novel revetment structure and the construction method thereof, the problem that an existing revetment structure cannot give consideration to structural strength and water permeability at the same time is solved, and the novel revetment structure and the construction method thereof can promote water circulation and healthy development of an ecological system.

The invention discloses high-strength durable pervious concrete and a preparation method thereof, and belongs to the technical field of building materials. The concrete is prepared from the following raw materials in parts by weight: 160 to 220 parts of cement, 1200 to 1600 parts of coarse aggregate, 170 to 230 parts of fine sand, 160 to 200 parts of water, 3 to 4.5 parts of polycarboxylate superplasticizer, 5 to 15 parts of silica fume, 1 to 3 parts of polypropylene fiber, 8 to 12 parts of modified nano cellulose and 5 to 7 parts of flexibilizer, wherein the flexibilizer comprises modified graphene oxide, propylene glycol monomethyl ether and polyisoprene rubber. The interface compatibility is enhanced through the modified nanocellulose, microcracks are reduced, the bonding strength of aggregate and cement is improved, and the compressive strength is improved; the toughening agent component endows the concrete with toughness and durability, the toughening agent component and the toughening agent component have a synergistic effect, and the concrete prepared by mixing the various raw materials has excellent mechanical properties and durability on the basis of good water permeability, and has a wide market application prospect.

The invention discloses a sponge city seepage and drainage structure and a sponge city water circulation system, and relates to the technical field of sponge city construction. A capillary air flotation grading pretreatment unit, a rhizosphere electro-catalysis layer and a mineral conversion filler layer are sequentially arranged below the permeable pavement layer in the rainwater permeation direction, and the drainage layer is a piezoelectric drainage layer; according to the method, blockages are subjected to capillary air flotation classification, minerals are converted into purification carriers, solid waste outward transportation is avoided, and heavy metal pollution is prevented; the water circulation end depends on photovoltaics, an external power grid is not needed, and carbon is reduced; sensor linkage adapts to a purification mode of high / low-pollution rainwater, and a straw self-cleaning function at the seepage and drainage end is prevented from being interrupted; the magnetic sensitive medium is prepared by converting blockages, outsourcing is avoided, and the cost is reduced; the ultrafine particles in the by-products assist in purification, the uleucite is used for preparing the pervious concrete, and the zeolite is used for improving the soil, so that environmental protection and resource regeneration are realized.

The invention relates to the technical field of building materials, and discloses a high-pervious concrete admixture and pervious concrete. The pervious concrete admixture is prepared from the following raw materials in parts by weight: 25 to 35 parts of acrylic resin, 5 to 10 parts of modified polypropylene fiber, 15 to 25 parts of water reducing agent, 7 to 10 parts of kaolin and 15 to 25 parts of reinforcing filler, acrylic resin is used as an adhesive structure, and a functional additive is added to improve the compression resistance, the impermeability and the water permeability of the pervious concrete; wherein due to the introduction of the reinforcing filler, the compressive strength and the impermeability of the matrix are improved, and the water permeability, the pressure resistance and the impermeability of the matrix can be improved through the synergistic effect of the modified polypropylene fibers and the reinforcing filler, so that the service life of the pervious concrete is prolonged.

The utility model discloses a vegetation concrete river channel slope protection structure which comprises a vegetation concrete slope protection face, a water conduction system and a purification module. The purification module can intercept rainwater and spray water flowing down from the vegetation concrete slope protection surface, the rainwater and the spray water are further filtered through the geotechnical cloth filter layer and the pervious concrete partition wall after being precipitated through the sewage collection tank, and therefore the purpose of further purification is achieved. The water can flow into the water body through the water guide pipe; and the water can be sprayed on the vegetation concrete slope protection surface through the spraying pipe, so that water necessary for growth can be provided for the vegetation concrete slope protection surface, and the vegetation concrete slope protection surface can be purified by fully utilizing the purification capacity of the vegetation concrete slope protection surface.

The invention relates to the technical field of building materials, in particular to a pervious concrete water permeability testing device which comprises a detection chamber and a measuring cup, the bottom of the detection chamber is fixedly connected with a rotating chamber, and a platform is fixedly connected between the detection chamber and the rotating chamber. A supporting ring for placing a pervious concrete sample is arranged in the detection chamber, a guide device for conveying a measuring cup is arranged in the rotating chamber, a push rod for directionally conveying the measuring cup is arranged in the guide device, and a rotating assembly for intermittently conveying the measuring cup is arranged at the bottom of the guide device. According to the invention, concrete is supported by the support ring, automatic conveying of the measuring cup is completed by using the rotating assembly, and detection of pervious concrete is completed by using the guide device and the push rod.

The invention relates to the technical field of concrete performance testing, in particular to a high-strength pervious concrete strength testing device which comprises a pressure testing machine, a testing table is arranged on the left side of the pressure testing machine, and a fixing unit used for fixing a concrete test piece is arranged at the upper end of the testing table. A testing unit for testing the compressive strength and the breaking strength of the concrete test piece is arranged above the testing table. The fixing unit used by the invention can accurately and stably fix the concrete test piece at the upper end of the test table, accurately align and stably fix the cubic test piece and the cuboid test piece, ensure that the loading force uniformly acts on the surface of the test piece, and avoid stress concentration caused by position deviation or inclination of the test piece; therefore, the authenticity and reliability of the test result are ensured. According to the invention, the structure of the fixing unit can be flexibly adjusted to adapt to the compressive strength test of the cube test piece and the breaking strength test of the cuboid test piece, so that one machine has two purposes.

The invention discloses cold bonding ceramsite and a preparation method and application thereof in pervious concrete.The cold bonding ceramsite is prepared from, by mass, 70-120 parts of solid waste base material, 5-8 parts of activating agent and 5-10 parts of binder, and the solid waste base material is prepared from dredged sludge, fly ash and waste concrete powder. The cold-bonded ceramsite is prepared from the solid waste base material under the conditions of microwave radiation, multi-element activation, granulation and staged maintenance, a high-temperature calcination process is not involved, the solid waste base material is fully utilized, the energy consumption of ceramsite preparation is reduced, solid waste resourceful treatment is realized, the land pressure of landfill is relieved, and the consumption of non-renewable resources is reduced. The prepared cold-bonded ceramsite is applied to the preparation process of the pervious concrete, the obtained pervious concrete has high strength, freeze-thaw resistance and salt corrosion resistance, and the comprehensive performance is remarkably improved.

The invention provides a method for detecting the porosity of pervious concrete. A detection table, a metering barrel and a measuring cup are included, a supporting frame is installed at one end of the detection table, a sliding rail is arranged on one side of the supporting frame, a supporting plate is installed in the sliding rail, a threaded lifting rod is installed on the supporting plate, and the bottom of the threaded lifting rod is connected with a chassis; the other end of the detection table is provided with an embedding groove, and an electronic scale is installed in the embedding groove. Compared with the prior art, the porosity of the pervious concrete is detected through the automatic device, and the detection efficiency and the result accuracy are greatly improved. The complexity of manual operation and personal errors are reduced, and the reliability of a detection result is ensured. The detection repeatability is improved, a consistent result can be obtained in multiple times of detection, and the method is suitable for large-scale industrial application. The device and the method provided by the invention can realize rapid and accurate detection of the porosity of the pervious concrete, are simple and convenient to operate, are suitable for field application, and are beneficial to improving the detection stability of the pervious concrete.

The invention relates to the technical field of building materials, and particularly discloses high-strength premixed pervious concrete for a surface layer and a preparation method of the high-strength premixed pervious concrete. The invention relates to high-strength premixed pervious concrete for a surface layer. The concrete comprises the following components in parts by weight: 220 to 300 parts of cement, 1570 to 1720 parts of double-graded broken stone, 85 to 120 parts of water, 50 to 100 parts of mineral powder, 18 to 35 parts of anhydrite, 4 to 10 parts of soluble sulfate, 0 to 50 parts of silica fume, 0 to 50 parts of fly ash of 1000 meshes, 20 to 35 parts of quartz stone fine sand of 80 to 120 meshes, 1 to 2.5 parts of a composite water reducing agent, 0.4 to 2.4 parts of a viscosity modifier, 6 to 10 parts of wollastonite fiber powder and 0.4 to 1 part of a defoaming agent. The composite water reducing agent comprises an ether polycarboxylic acid water reducing agent and an ester polycarboxylic acid water reducing agent. The composition and proportion of the concrete are designed and adjusted, so that the concrete has a good construction effect under the premixing condition.

The invention relates to the technical field of building roof greening, and discloses a building roof greening and rainwater recycling irrigation system which comprises a microcontroller, a greening module arranged on a building roof, a rainwater recycling module connected with the greening module and an irrigation module. The microcontroller is electrically connected with the greening module, the rainwater recycling module and the irrigation module; the greening module sequentially comprises a water collecting layer, a filtering layer, a protective layer, a pervious concrete layer, a nutrient soil layer and a vegetation layer from bottom to top. The rainwater recycling module comprises a water pumping pipe arranged at the top of the side wall of the water collecting layer and a rainwater recycling box connected with the water pumping pipe; the rainwater recycling box comprises a first filter box, a second filter box, a disinfection box and a clear water box which are sequentially arranged from top to bottom; the irrigation module comprises a first water suction pump connected with the clear water tank, a water outlet pipe connected with the first water suction pump, a water conveying pipe connected with the water outlet pipe, a drip irrigation pipe connected with the water conveying pipe and a water dropper. By means of the system, maximum utilization of rainwater resources and continuous improvement of the ecological environment are achieved.

The utility model discloses a cement pervious concrete pavement paving device which comprises a bottom plate, an installation groove is formed in the front end of the bottom plate, a spiral auger is movably installed in the installation groove, supporting rolling rollers are installed on the two sides of the spiral auger, a second belt pulley is installed on the left side of the spiral auger, and a first belt pulley is installed on the right side of the second belt pulley. And a second motor is installed on the left side of the upper portion of the bottom plate, a first belt wheel is installed at the output end of the second motor, a transmission belt is connected to the lower portion of the first belt wheel, and a connecting bearing is installed in the middle of the interior of the bottom plate. According to the cement pervious concrete pavement paving device, piles of cement pervious concrete are spread towards the two sides by arranging the spiral packing auger, then the spread cement pervious concrete is spread flatly by rotating the spreading plate, then the spread cement pervious concrete is scraped flatly again through the scraping plate, and redundant cement pervious concrete is scraped away; and finally, primary compaction is performed through the flattening roller, so that the laying efficiency of the cement pervious concrete pavement is greatly improved.

The invention discloses a plateau area pervious concrete mix proportion design method which comprises the following steps: step 1, testing the compressive strength and the permeability coefficient of existing pervious concrete, and selecting the existing pervious concrete meeting the requirements of a plateau area; 2, parameters of the coarse aggregate particle size, the water-binder ratio and the porosity of existing pervious concrete are obtained, and therefore function relations between the coarse aggregate particle size, the water-binder ratio and the target porosity and the compressive strength and the pervious coefficient are established; and step 3, obtaining the coarse aggregate particle size, the water-binder ratio and the porosity with the optimal compressive strength and the optimal permeable coefficient through the function relationship, and using the permeable concrete mix proportion of the coefficient for pavement paving in the plateau region. The influence of the aggregate particle size, the water-binder ratio, the porosity and the curing mode on the mechanical property and the permeability coefficient of the pervious concrete is considered, the relation between the mechanical property and the permeability coefficient is established, and the optimal mix proportion is obtained through the relation.

The invention relates to the technical field of concrete, in particular to a high-strength and high-permeability concrete mix proportion design method based on aggregate characteristics. The method comprises the following steps: firstly, providing a dynamic multivariate prediction model for comprehensively analyzing a relationship between aggregate characteristics and concrete performance, and realizing selection scheme optimization of the aggregate characteristics through regression analysis of a strength and water permeability objective function; secondly, the invention provides an inertia self-adaptive particle swarm optimization algorithm, and by dynamically adjusting inertia weights and learning factors of particles, efficient solution and optimization of a dynamic multivariate prediction model are realized, optimal aggregate characteristic parameters are accurately searched and determined, and optimal balance of concrete performance is ensured to be realized under various requirements; finally, a cost calculation function is provided for the mix proportion of the high-strength and high-permeability concrete, the cost required by the mix proportion scheme is evaluated through accurate accounting of all raw materials and other costs, and a scientific economic decision basis is provided for design of the mix proportion of the concrete.

The preparation method comprises the following steps: mixing 100-160 parts of recycled aggregate, 30-40 parts of a cementing material, 18-19 parts of water, 0.36-1.08 parts of cellulose ether, 0.36-0.72 part of a defoaming agent, 0.36-3.6 parts of dispersible latex powder and 1.8-2.88 parts of early-strength seed crystal, then curing until demolding, feeding into a carbonization kettle for carbonization, and feeding into water for curing after carbonization is completed, thereby obtaining the early-strength quick-hardening efficient carbon-sequestration regenerated pervious concrete. According to the method, a multi-curing combined mode is adopted, the proper pre-curing time is selected, the permeable concrete subjected to early carbonization curing is placed in water for curing, a proper humidity condition is provided for hydration of cement paste in a permeable concrete carbonization layer, and therefore the later strength can be increased easily.

The utility model relates to the technical field of slope protection, in particular to an artificial lake ecological protection slope based on pervious concrete. The overwater part sequentially comprises a slope greening layer used for planting ecological green plants, a soil-based nutrition layer used for supplying nutrients to the green plants, an ecological water-permeable concrete layer used for enhancing the drainage performance and providing stable support and a first sand gravel cushion layer laid on foundation soil and used for dispersing loads of an upper structure from outside to inside. The underwater part sequentially comprises a second sand gravel cushion layer and an inverted filter ecological concrete layer from inside to outside, wherein the inverted filter ecological concrete layer is used for adsorbing pollutants and filtering a water body. The utility model aims to solve the problems of insufficient slope protection water permeability and insufficient nutrient supply.

The utility model relates to the technical field of building materials, in particular to a pervious concrete performance testing device which comprises a base, a testing barrel and a top housing. An electric inflator pump is mounted on one side of the test barrel through a mounting seat, and a timer is mounted at the lower end of the electric inflator pump through a screw; a pressure gauge is installed at one end of the testing barrel through a screw, a feeding and discharging opening is formed in the top end of the testing barrel, a butt joint disc B is arranged at the top of the feeding and discharging opening, a butt joint disc A is clamped to the top of the butt joint disc B, and a top cover shell is arranged on the inner side of the butt joint disc A; the pervious concrete performance testing device is convenient for increasing the pressure of a water body on a sample, increasing the speed of the water body entering the sample, and automatically giving an alarm after a set time is reached.

The invention relates to a preparation method of recycled aggregate pervious concrete, which comprises the following steps: sequentially crushing and screening waste concrete to obtain waste stone powder with the particle size of less than 0.075 mm and coarse aggregate with the particle size of 5-30 mm; the method comprises the following steps: washing and drying waste stone powder, adding glass powder and sodium hydroxide, and reacting to obtain a sodium silicate alkali activator; the preparation method comprises the following steps: firstly, adding coarse aggregate into a magnesium alginate aqueous solution, soaking until the coarse aggregate absorbs water to be saturated, sequentially adding sodium polyacrylate, mango butter and hydrogenated polyisobutene during soaking, stirring and mixing, then introducing carbon dioxide gas for carbonization, and carrying out post-treatment after carbonization is finished, so as to obtain recycled aggregate; and mixing the cement, the slag powder, the alkali activator, the machine-made sand, the recycled aggregate, the polycarboxylate superplasticizer and water to obtain the pervious concrete. The invention provides a preparation method for completely replacing natural coarse aggregate of the pervious concrete with the recycled aggregate, and the slag powder is used for replacing cement in a large proportion to serve as a cementing material, so that the high-strength and high-permeability all-waste aggregate green pervious concrete material can be prepared.

The invention discloses a leveling device for paving a pervious concrete pavement and a leveling method thereof, and relates to the technical field of pavement paving, the leveling device comprises a vehicle body, a box body is fixedly mounted at the top of the vehicle body, a charging box is fixedly mounted at the upper end of an inner cavity of the box body, and the bottom of the charging box is connected with a leveling assembly through a pipeline; and the leveling assembly is used for paving pervious concrete on the earth road. According to the leveling device for paving the pervious concrete pavement and the leveling method of the leveling device, the size of the discharging groove in the collecting hopper can be automatically adjusted through the arranged adjusting part according to the actual condition of the pavement, so that the discharging amount of concrete is accurately controlled, and the discharging groove is enlarged at the sunken part of the pavement so as to increase the discharging amount of the concrete and fill the sunken part; at the raised part of the road surface, the discharge chute is reduced to reduce the discharge amount of concrete and avoid excessive accumulation, and the intelligent adjustment ensures the flatness of concrete laying and improves the construction quality.

The invention relates to the technical field of road engineering material design and calculation, and discloses a calculation method for pervious concrete double-layer grating arrangement parameters. According to the method, a geogrid working performance coefficient, a grid interlayer spacing optimization factor, an effective permeability rate correction coefficient, an interlayer synergistic effect coefficient, a layered stress diffusion factor and a permeability comprehensive index are introduced for the first time, a quantitative evaluation model is constructed, and a multi-dimensional performance index and a structure response function are constructed. The structural mechanical behavior and permeability of the pervious concrete are comprehensively considered, and the double-layer arrangement position and interlayer spacing of the geogrid are determined. The blindness of traditional empirical layout is overcome, and the method is suitable for road structure design under medium and heavy traffic loads. According to the method, a scientific and computable double-layer arrangement parameter determination method is established, and collaborative optimization of the grid enhancement effect and the water permeability performance is achieved.

The application relates to the technical field of slope engineering prevention, in particular to an expansive soil ecological supporting structure based on recycled water permeable concrete and a construction method, which comprises a waterproof film coating layer, a recycled water permeable concrete layer, a backfill soil layer, a retaining board and a bottom EPS foam board, the waterproof film coating layer is formed by uniformly spraying waterproof film coating on a slope surface, the recycled water permeable concrete is sawtooth-shaped and is poured on the waterproof film coating layer, the backfill soil is covered on the recycled water permeable concrete layer, the retaining board is arranged at the bottom of the expansive soil slope, and the bottom EPS foam board is arranged between the retaining board and the expansive soil slope. Based on the concept of a sponge city, the application forms a slope water storage structure by using the recycled water permeable concrete and the waterproof film coating layer, achieves the effect of 'flood drainage and drought replenishment', reuses engineering slag soil and waste degradable materials, achieves the purpose of low carbon, simultaneously utilizes the anchoring effect of the vegetation root system, and realizes long-term green and low-carbon protection of the expansive soil slope.