228results about How to "Guaranteed water permeability" patented technology

A composite water permeable brick comprises water permeable surface and base closely combined together with aggregate and adhesive coating the aggregate, with the adhesive of the said water permeable surface including at least hydrophilicity adhesive. It can keep fine water permeability, with the brick surface fine and close and reduced in cost.

The invention discloses a water permeable brick and a preparation method thereof. The water permeable brick comprises two parts, namely a surface layer and a base layer, wherein the material of the surface layer is prepared from the following components in percentage by mass: 60-70% of ceramic sand, 15-20% of sand and 15-20% of cement, and in addition to the solid components with the sum of 100% in percentage by mass, water accounting for 50-60% by mass of cement is further added; and the material of the base layer is prepared from the following components in percentage by mass: 45-65% of building silt unburned ceramsite, 10-15% of cement, 5-10% of fly ash, 10-15% of melon seed-shaped drug slices and 10-15% of sand, and in addition to the solid components with the sum of 100% in percentage by mass, the water accounting for 30-40% and a water reducer accounting for 1-1.5% relative to total mass of the cement and the fly ash are further added. The water permeable brick disclosed by the invention is prepared by using the building silt unburned ceramsite to replace natural aggregate or calcined ceramsite, on one hand, the using ways of the building silt unburned ceramsite can be expanded, the utilization rate of solid wastes is improved, and negative effects on an environment are reduced, and on the other hand, the obtained water permeable brick has excellent performance.

The invention discloses permeable recycled aggregate and ceramsite concrete doped with industrial and agricultural solid waste and preparation. The permeable recycled aggregate and ceramsite concrete doped with industrial and agricultural solid waste is characterized in that recycled coarse aggregates and ceramsites are taken as coarse aggregates of concrete, an appropriate amount of pretreated industrial and agricultural solid waste such as industrial waste, agricultural waste, household garbage and the like is taken as an admixture, a cementing agent is prepared from cement, water, a superplasticizer and a reinforcement material, and the materials are mixed with a preset stirring process and preparation method, so that ecological concrete with good mechanical property, permeable property and durability is produced. According to the concrete, the waste utilization rate is up to about 80%, the concrete is environment-friendly, locally available materials can be used, the economic benefit is remarkable, ceramist pore is smaller, and sewage can be continuously and stably treated, so that the concrete is commonly used in water environment comprehensive improvement engineering; and besides, the concrete has light weight, high strength and good water permeability and can be also used in permeable pavement engineering such as a sidewalk, a parking lot and the like as well as plant engineering such as ecological riverway slope protection, roof landscape planting and the like.

The invention discloses a double-layer baking-free permeable brick and a manufacturing method thereof. The permeable brick consists of a face layer and a base layer, wherein the face layer mainly comprises 3 to 5 weight parts of mountain flour and 2.2 to 4.4 weight parts of adhesive; the base layer mainly comprises 2 to 4 weight parts of sand stone and 1.2 to 2.4 weight parts of adhesive; the sand stone are small stones made of natural sand and crushed scraps from stone processing; and the thickness ratio of the face layer to the base layer is 1:10-20. The manufacturing method comprises that: the face layer is prepared by mixing and stirring the mountain flour, cement, polymerizer, water and paint in a ratio, filling the mixture in a forming mold, and compacting by vibration; the base layer is prepared by mixing and stirring the sand stone, cement, polymerizer and water in a ratio, uniformly filling the prepared base layer material in the mold after the face layer material is solidified initially and compacting by vibration; and removing the mold after the face layer and the base layer are solidified, maintaining at normal temperature for 10 to 20 days, and obtaining the double-layer baking-free permeable brick.

The invention discloses a water permeating and anti-skidding floor tile. The water permeating and anti-skidding floor tile comprises a bottom layer, middle layers and a surface layer all of which are combined together. The bottom layer is a dense ceramic layer, and a water removing hole penetrating through the upper surface and the lower surface of the bottom layer is formed in the bottom layer. The middle layers are porous ceramic layers which are provided with a plurality of through holes, and the effective aperture of each through hole is not larger than that of the water removing hole. The surface layer is a decoration glaze layer, and a plurality of micropores are formed in the decoration glaze layer, and the effective aperture of each micropore is not larger than that of the through holes. Preferably, the middle layers comprise at least two layers, and the effective apertures of the through holes in each layer are reduced gradually from bottom to top. Compared with the prior art, the water permeating and anti-skidding floor tile has the advantages of being good in water permeating performance, anti-skidding effect, mold proofing effect, anti-pollution effect and decorative effect. The invention further provides a manufacturing method of the water permeating and anti-skidding floor tile.

The invention discloses a pervious concrete special-purpose additive and a use thereof. The pervious concrete special-purpose additive comprises, by mass, 10-20% of a polycarboxylic acid water reducer, 5-25% of a polycarboxylic acid slump retaining agent, 0.5-3% of a water-retaining agent, 0.5-5% of a thickening agent, 1-5% of a delayed coagulant and 52-75% of water. A mass ratio of the additive to the gelling material in the pervious concrete is 1-2%. Ingredients of the pervious concrete special-purpose additive produce good synergism. The pervious concrete special-purpose additive guarantees water permeability, well keeps pervious concrete workability for 2h or more, improves strength after aging and realizes pervious concrete premixing production.

The invention discloses a pervious concrete brick with high strength. The brick comprises the following raw materials: ordinary portland cement, broken stones, phosphogypsum, lithium slag powder, steel slag, coal ash, silica fume, iron tailing sand, metakaolin, mixed fibre, straw powder, a water reducer, poly(styrene-co-butadiene), a silicone acrylic emulsion, redispersible latex powder, macroporous resin, an epoxy resin adhesive, ethylene diamine tetra (methylene phosphonic acid) sodium, diisopropanolamine, sodium hyposulfite, calcium lignin sulphonate, and water. The pervious concrete brick with high strength has the advantages of high compressive strength, excellent water permeability, and good frost resistance.

The invention discloses an ecological comprehensive treatment system of a northern mountain river channel. The system comprises three sub ecological systems of an ecological permeable dike built on the upstream of a main stream and a branch stream of a mountain river, a reservoir pond arranged at the middle and downstream area of the mountain river and a wet land communicated with the reservoir pond, and adopts an ecological treatment mode of closure-storage-preservation. The construction method comprises the steps of: a) building of the ecological permeable dike; b) setting of a triangular pyramidal wood pile stone cage; c) building of the reservoir pond; d) planting of plants of the reservoir pond; e) building of a wet land system; and f) recovery of a river bank band. The system and the construction method can effectively intercept the mountain debris flow and the river non-point source pollution, adjust the river runoff, improve the hydrologic conditions of the mountain river in non-flood season, decrease the dry season of the mountain river, and facilitate to recover the ecological system of the mountain river. Meanwhile, traditional depressions and empty ponds in the mountain river can be used in construction, so that the engineering building cost is reduced, and the self-cleaning capacity of river water is improved.

The invention discloses a special compound additive for pebble-type permeable concrete, which comprises the following materials in parts by mass: 80-90 parts of ultrafine microbead, 10-15 parts of silicon ash, 20-30 parts of lithium slag powder and 0.0005-0.001 part of polyoxyethylene. The raw materials are measured according to the formula, and added into a mixer to be evenly mixed, thereby obtaining the product disclosed by the invention. The compound additive can obviously enhance the viscosity and water retention property of the cement mortar, and improve the coating property of the cement mortar on the pebble surface and the binding property with the pebble surface, so that the pebble-type permeable concrete mixture has favorable cohesiveness, water retention property and uniformity, solves the problem of poor surface mortar coating property of the pebble-type pervious concrete coarse aggregate, ensures the permeability and mechanical properties of the concrete as well as the engineering construction quality, and has favorable comprehensive benefits.

The invention relates to a high-strength fiber pervious concrete pavement brick and a preparation method thereof. The high-strength fiber pervious concrete pavement brick is formed by stirring, distributing, extruding materials such as single-sized aggregate (quartz sand, broken stones), P.O42.5 cement, modified polypropylene fiber as a reinforcing material, an air-entraining hardening accelerator, and water. The aggregate gradation has no continuity, a large quantity of connecting pores exist in a structure, so the pervious concrete pavement brick is a porous concrete product with a large quantity of non-closed pores inside. During the rain or when water is accumulated on a road surface, the water can successfully permeate into the underground or is temporarily stored in a pervious subgrade along the perforative 'paths' in the pervious concrete pavement brick and then is further drained.

The invention discloses a stone texture imitating permeable concrete prefabricated brick. The stone texture imitating permeable concrete prefabricated brick consists of two parts of a permeable main body layer and a stone texture imitating permeable surface layer from bottom to top, wherein the permeable main body layer is made from the following raw materials, in mixing proportion by weight of concrete per cubic meter: (a) macadams which are used as aggregates, with the addition amount of 1400kg / m<3>~1550kg / m<3>; (b) 310kg / m<3>~350kg / m<3> of cement; (c) 3.0kg / m<3>~3.5kg / m<3> of water reducing agents; (d) 25kg / m<3>~35kg / m<3> of fly ash. The stone texture imitating permeable concrete prefabricated brick provided by the invention has a permeable function, and at the same time, the surface of the stone texture imitating permeable concrete prefabricated brick has a decoration effect similar to that of natural stones; the stone texture imitating permeable concrete prefabricated brick integrates with environment, and the natural quality of cities is enhanced, so that the relationship between human beings and nature is closer. Moreover, the design of an optimized mixing proportion ensures the water permeability, the wear resistance and the physical mechanics index of the stone texture imitating permeable concrete prefabricated brick.

The invention discloses a construction method for a super vacuum dewatering well and a well tube structure used in the construction method. The method comprises the following processes: measuring a well position, burying a mouth protecting tube, mounting a drilling machine, carrying well construction, drilling holes, cleaning holes for mud fluid displacement, descending a well tube, packing a filter material and cleaning the well. The method adopts the segmented well tube, ensures a permeable effect, isolates air from entering the super vacuum dewatering well, and overcomes the defect that the vacuum degree of a common vacuum deep well is reduced as air enters the well after the water level drops. During dewatering, the method can greatly improve the dewatering effect, reduce the engineering cost, accelerate the construction process, and reduce the labor intensity of workers. The process is easy to operate and master.

The invention discloses ecological and environmental protection type pervious concrete prepared from waste concrete. The pervious concrete is prepared from raw materials in percentage by weight as follows: 65.5%-79.5% of recycled aggregate composition, 1.2%-2.4% of recycled concrete micro-powder, 14-19.5% of cement, 2.4%-4.8% of granulated ferrochrome slag powder, 0.1%-0.3% of a water reducing agent, 0.1%-0.3% of a modifier, 0.1%-0.2% of Welan gum and the balance of water. According to the ecological and environmental protection type pervious concrete, a large quantity of construction garbage and waste residues are consumed, exploitation of natural resources is reduced, the cost is reduced, the added economic value of the construction garbage and the waste residues is increased, development of the construction garbage resource treatment and utilization industry is promoted, and the concrete has the significant economic benefit and social benefit; the modifier and the Welan gum are used, the reactivity of aggregate and an additive in the pervious concrete is improved, and the strength of the concrete is significantly improved on the premise that the permeability performance is guaranteed.

The invention provides a processing material for adsorption and removal of harmful substances in heavy metal ion harmful substance-containing water, and the harmful-substance processing material is prepared by adhesion curing or hydration reaction of one or more than two magnesium compounds selected from magnesium oxide, magnesium hydroxide, magnesium carbonate and hydrotalcite in active porous calcium silicate particles. The harmful-substance processing material can effectively remove arsenic, lead, cadmium, chromium, selenium, cesium, zinc and other heavy metals, and phosphate, fluoride and other elements, is good in stability after adsorption of the heavy metals, the harmful substances may not be redissolved out with as time goes by or due to oxidation, and a lot of subsequent processing is not needed.

The invention discloses a sludge haycite water-permeable brick and a preparation method thereof. The sludge haycite water-permeable brick comprises a surface layer and a base layer, and is characterized in that the surface layer is prepared from, by weight, 1 part of white cement, 0.05 part of ferric oxide, 1-2 parts of haycite sand of 1 mm to 3 mm, 0.2-0.5 part of yellow sand, 0.02-0.04 part of water reducer and 0.3-0.4 part of water; the base layer is prepared from 1 part of 42.5-grade Portland cement, 0-2 parts of haycite sand with the grain size being 3 mm to 5 mm, 0-2 parts of the haycite with the grain size being 1 mm to 3 mm, 0.2-0.5 part of yellow sand, 0.02-0.04 part of water reducer and 0.3-0.4 part of water. The preparation process comprises the steps that the sludge haycite is crushed and screened, the raw materials of the surface layer and the base layer are weighed in proportion, the raw materials are mixed and stirred, and a brick body is formed and maintained. The sludge haycite water-permeable brick has the advantages of being low in cost, high in strength and good in permeability performance, preventing sliding, resisting wear and the like.

The invention discloses a static-pressure high-strength wear-resisting concrete anti-blocking and water-permeable brick and a preparation method thereof, belonging to the technical field of building materials. The preparation method comprises the following steps: adding 900-1000 parts of basalt macadam, 260-390 parts of cement, 31-41 parts of silica fume, 8.5-18.5 parts of superfine slag powder, 7-11 parts of coal ash and 100-130 parts of water into a gravity-free stirring machine, and stirring for 3-5 minutes; then feeding 0.9-1.1 parts of a pore-forming agent and 2.8-3.2 parts of a water reducing agent into the mixed material, stirring for 1-2 minutes, and discharging for later use; standing for 2-3 minutes at normal temperature and pressure, charging the material into a static pressing machine, and pressing to form the concrete anti-blocking and water-permeable brick. By virtue of optimized component design and reasonable component ratio, the problems of poor water permeability, low compressive strength and the like of pavement water-permeable bricks are effectively solved, and furthermore, the production process is simple and is convenient to popularize and apply.

The invention discloses high-strength highly-permeable inorganic concrete and a preparation method thereof. The high-strength highly-permeable inorganic concrete comprises, by weight, 60-120 parts of water, 200-500 parts of cement, rubble, sand, 100-200 parts of mineral powder, fly ash, 1200-1800 parts of steel slag, 100-300 parts of quartz sand, 30-80 parts of a reinforcing agent, 10-30 parts of a water reducing agent and stones. According to the high-strength highly-permeable inorganic concrete, the mineral powder and the reinforcing agent are utilized to equivalently replace cement, the grading proportion of a permeable concrete gelled material can be improved, permeable concrete with good fracture resistance and permeability performance is obtained, cement consumption is lowered, the cost is saved, the problem that the steel slag and mineral waste residues serve as waste to cause secondary pollution to the environment is solved, industrial waste is effectively utilized, and good environmental benefits are achieved.

The invention provides electrochemical-membrane separation water-treatment plant and a treatment method thereof. The plant comprises a reaction tank, inside which a membrane module is arranged. The membrane in the membrane module is a conductive membrane. A positive plate is arranged parallel to the membrane module at one side of the membrane module. The membrane module, which is used as a negative plate, and the positive plate are connected with an external power source. The main body of the reaction tank is equipped with a water inlet and a water outlet. An outlet of the membrane module is connected with the water outlet on the main body of the reaction tank. By combining electrochemistry and membrane separation process, polluted water is pretreated by electrooxidation or electric flocculation to form a pollutant filter cake layer, and the membrane module having the conductive membrane is used as the cathode to degrade the pollutant. Thus, membrane pollution is alleviated and the membrane cleaning effect is also achieved, the service cycle of the membrane is prolonged, and service life of the membrane is prolonged. Meanwhile, separation efficiency of pollutants in water is enhanced, and the water quality of effluent is improved.

The invention discloses an artificial fish reef with waste mytilus shells as a body. The artificial fish reef comprises a frame structure formed by welding triangle steel, the top end of the frame structure is open, a base formed by a cement board is fixed at the bottom end of the frame structure, and each side face of the frame structure is laid with a slice-shaped component coincident with the side face in shape and size; the slice-shaped components are prepared by extruding meshes and the waste mytilus shells with which the meshes are filled, and young oysters are attached to the surfaces of the slice-shaped components. According to the artificial fish reef with the waste mytilus shells as the body, the artificial fish reef is prepared with a large quantity of waste mytilus shells, a preparing method is simple, convenient and easy to achieve, and compared with a traditional artificial fish reef, the emission reduction effect of the artificial fish reef is good; the artificial fish reef serves as an important facility of a marine ranch, and has the advantages that eco-environmental friendliness is achieved, the structure is stable, and hold time is long.

The invention relates to a leaching mechanical-biological reactor for treating household garbage. The leaching mechanical-biological reactor comprises a charging hole, a waste gas collecting hole and a liquid inlet box body, wherein a stirring mechanism, a filtering and deslagging mechanism, a grating clearing mechanism and a liquid collecting box are arranged in the box body; the filtering and deslagging mechanism comprises a grating set and a deslagging spiral feeder, wherein the grating set is connected with the box body; a connecting rod and more than three cutter bars are arranged on a blade supporting frame of the grating clearing mechanism; a drive shaft of a power driver arranged on the outer part of the box body extends into the box body and is connected with the blade supporting frame; more than three clearing blades on each cutter bar are arranged in a grating gap corresponding to the grating set and are higher than the end surfaces of grid bars; the liquid collecting box is arranged on the lower part of the box body; and the leaching spiral feeder is arranged on the bottom of the liquid collecting box. The leaching mechanical-biological reactor has a reasonable structure, a small volume, is stable in treatment, and can remove most of inorganic substances which are not easy to biodegrade; furthermore, the operation stability of the device can be improved; and moreover, when the organic substance serous fluid enters an anaerobic reactor, the treatment efficiency of the anaerobic reactor can be ensured.

The invention discloses a graphene enhanced water permeable brick which comprises two parts, namely, a bottom layer and a surface layer. The graphene enhanced water permeable brick is characterized in that the bottom layer at least comprises the following components in parts by weight: 16-18 parts of cement, 18-22 parts of fine sand, 50-60 parts of rock ballast and 5-6.5 parts of water; the surface layer at least comprises the following components in parts by weight: 65-80 parts of quartz sand, 15-20 parts of cement and 5-6.5 parts of water; graphene carbon materials are doped in both bottom layer and surface layer; and graphene and graphene oxide are used as the graphene carbon materials. According to the invention, the graphene is treated and then is used as a novel additive to be introduced into a water permeable brick, the graphene can be uniformly dispersed in a binding material system following water, the graphene slices have ultrahigh specific surface area and rigidity, and the Van der Waals force between the slices and the interaction between the slices and the cement grains can excellently stabilize the binding material system, can reduce the phenomena, such as, cracking and falling, and can enhance the binding effect of the binding material system, so that the overall strength of the water permeable brick can be promoted.

The invention discloses a water-permeable reclaimed asphalt mixture paving brick and a preparation method thereof. The invention is characterized in that the paving brick is prepared from the following components in parts by weight: 80-100 parts of reclaimed asphalt mixture, 0-20 parts of new aggregate, 2-5 parts of water, 1-6 parts of cement, 2-6 parts of emulsified asphalt, 0-3 parts of ore powder and 1-5 parts of polyvinyl acetate emulsion, wherein the reclaimed asphalt mixture and the new aggregate are of a single size grade of 2.5-10 mm, and the sum of the weight parts of the reclaimed asphalt mixture and the weight parts of the new aggregate is 100. According to the invention, the resource utilization rate can be increased, the environmental pollution can be reduced, and the expense can be saved by several hundred million Yuan.

The invention discloses a blueberry root domain space covering cultivation method which comprises the steps as follows: adopting a planting furrow covering method or a planting hole covering method, covering the interior of the planting furrow with crop straws, sawdust or pine needles, laying microporous permeable non-woven fabrics on all walls and the bottom of the planting furrow, and using plastic films to partition the non-woven fabrics on all walls of the planting furrow, planting blueberry seedlings, wherein the root system of the blueberry seedlings cannot penetrate through the non-woven fabrics, filling the nutrient soil to the planting furrow and performing fix planting of the blueberry seedlings, and covering overground parts of the blueberry seedlings after fixing planting with the crop straws, sawdust or pine needles with certain height, wherein the pH value of soil is stabilized within the range of 4.5-5.7. Therefore, the blueberry root domain space covering cultivation method is simple to operate, the purpose of improving blueberry planting soil can be achieved only with lower cost, the influence on growth of blueberries due to inappropriate soil conditions is avoided, the soil has favorable permeability, the blueberries grow well, the fruit quality is improved, and the blueberry root domain space covering cultivation method is very conducive to production of organic fruit products and expansion of planting range of the blueberries.

The invention belongs to the technical field of road paving materials, and discloses high-strength pervious concrete and a preparation method of the pervious concrete. The pervious concrete comprises the following raw materials in parts by weight: 100-150 parts of cement, 300-450 parts of macadam, 30-50 parts of medium sand, 40-60 parts of water, 3-10 parts of polycarboxylic acid, 2-8 parts of slaked lime, 1-3 parts of water absorbent gel, 0.5-2 parts of soluble starch, 0.2-0.8 part of nano calcium oxide, and 0.05-0.1 part of an expanding agent. The pervious concrete is good in construction performance, high in porosity and good in wear resistance; the compressive strength reaches 30 MPa; the flexural strength reaches 3 MPa; a pervious coefficient reaches above 5 mm / s; various project demands with a pervious requirement for concrete can be met; ecological balance can be maintained; sustainable development can be realized.

The invention discloses a road construction pretreatment device. The road construction pretreatment device comprises two rows of roadbed support bodies, an even number of support layers and a plurality of connecting plugs, wherein the two rows of roadbed support bodies are arranged inside a roadbed in the extending direction of the roadbed; the roadbed support bodies of any row of roadbed supportbodies are uniformly partitioned from one another, and any roadbed support body comprises a plurality of support pieces arranged in a tandem array manner; the even number of support layers extend in the length direction of the roadbed and are arranged inside the roadbed; the connecting plugs are embedded at the joint of two sections of the roadbed. According to the road construction pretreatment device provided by the invention, the strength, stability and drainage performance of the roadbed can be improved effectively, the traffic load capacity of the road is improved integrally, and the service life is prolonged. A correct and reliable construction method is further provided for the road construction pretreatment device.

The invention discloses a premixed pervious concrete, a preparation method and an application thereof and belongs to the technical field of building material concrete. The premixed pervious concrete disclosed by the invention contains cement, coarse aggregate, silica fume, polymer emulsion, special plastic retaining agent, polycarboxylate superplasticizer and water, wherein the special plastic retaining agent is formed by taking macro-monomer ethylene glycol monovinyl polyethylene glycol ether, ethyl acrylate, sodium allysulfonate and hydroxyalkyl acrylate as unsaturated monomers, benzoyl peroxide as an initiator and 3-thiohydracrylic acid as a chain transfer agent and then compounding. According to the technical scheme of the invention, the premixed pervious concrete is capable of meetingthe demand of large-scale application in pervious concrete market, and meanwhile, the use performance of the premixed pervious concrete can be effectively guaranteed so as to guarantee the stabilityof engineering construction quality.

The invention relates to a temporary planting method for maidenhair trees. The method comprises the following steps: step 1, transplanting the main roots of a to-be-temporarily-planted seedling of maidenhair tree into a non-woven nutrition bag; step 2, enabling the depth of a pit for the to-be-temporarily-planted seedling to be 1.5 times of the thickness of nutrient soil; step 3, placing the non-woven nutrition bag into the pit and lifting the seedling after the seedling has vigorously grown; step 4, bundling the seedling together with the non-woven nutrition bag into a soil ball during lifting of the seedling, transporting the seedling and spraying a nutrient solution on the crown of the seedling; and step 5, cutting off the non-woven nutrition bag with a pair of scissors before field planting. According to the temporary planting method provided by the invention, all the main roots are placed in the non-woven nutrition bag to avoid excessive extending of the root system; thus, the root system of the lifted seedling is ensured to be undamaged and a survival rate is guaranteed to be more than 98%.

The invention provides a pervious concrete pavement paving construction special leveling roller, which comprises a roller and two pull bars connected on two ends of the roller; in which, the roller is a hollow cylinder with a water inlet for filling into counterweight water formed on the side connected with the inner space, the roller has supports on the two ends; a bearing is disposed on each support; a hinged support is fixed on each bearing; the hinged support is hinged with the pull bar through a movable hinge; and the other end of each pull bar is connected with a handle. The invention can not only roll and level the laid concrete by manpower push-and-pull, but also can adjust the roller counterweight according to working property of the concrete mixture to ensure both the strength of the pervious concrete pavement and the porosity of the pavement and water penetration; and is especially suitable for pavement construction of thin pervious pavement.

The invention belongs to the anti false technical area including following procedures. The precoat film is made by pre coating the anticorrosive hot-melt adhesive on the anticorrosion plastic film. The plastic film exposed by the heavy ion becomes the irradiation film. The composite film is prepared by heating the precoat film and the irradiation film together. Then, the chemical etching makes the aperture of the heavy ion micropore in 3-5 mu m. After etching, with the precoat film being removed from the irradiation film covered, through the rinsing and baking processes, the anti-false film of the heavy oil is obtained. It is milk-white in the pattern area of the anti-false film and it keeps the original transparency in non-pattern area. The invention possesses the features of double-faced protection, the clear pattern, low cost and easy of preparing the precoat film in large scale.

The invention provides an environment-friendly water permeable brick as well as a compression forming mould and a preparation method for preparing the environment-friendly water permeable brick. The water permeable brick is formed by a water permeable brick surface layer and a water permeable brick base layer, wherein materials of the surface layer mainly comprise sand with the particle size being 10 to 20 mesh and cement; materials of the base layer mainly comprise large gravel with the particle size being 3 to 8mm and cement. The method specifically the steps of adding the materials into two stirring machines respectively, adding other materials of corresponding formulas for evenly stirring, then compressing by a brick compression forming machine, distributing the base layer materials twice and the surface layer materials once in a lower mould hollow part of the compression forming mould, performing shaking compression for 2 to 3s after each time of material distribution, thus preparing a formed green brick, and then performing curing to form the water permeable brick. A dry-press forming process is adopted to prepare the water permeable brick, so that the production cost and the energy consumption are reduced; the prepared water permeable brick has good water permeability, abrasion performance, skid resistance and crushing resistance.