16results about How to "Reduce water permeability" patented technology

The invention belongs to the field of roof waterproof protection layers, and particularly discloses a roof waterproof protection layer construction method based on microbial concrete, which comprises the following specific steps: S1, microbial culture; s2, protective carrier wrapping; s3, preparing concrete; s4, concrete pouring; s5, concrete curing; according to the invention, expanded perlite particles are used as a carrier medium to respectively immobilize individual bacillus and aerobic mixed bacteria, so that the expanded perlite particles are activated and induced to form a composite mineralized structure when cracks are formed, the crack repairing effect is enhanced, and the high strength of aragonite and the good filling property of calcite are combined, so that the crack repairing effect is improved. According to the present invention, the expanded perlite particles are adopted as the carrier medium, and are combined with the hydrogel wrapping the surface of the bacteria-containing expanded perlite, such that the microorganism can be protected, the water storage agent can be used as the water storage agent, and the living environment of the microorganism can be enhanced.

The invention provides a preparation method and application of a novel UHPC tunnel jacking pipe, belonging to the technical field of ultra-high performance concrete. The preparation method comprises the following steps: S1, by weight, 63 parts of cement, 7-10 parts of silica fume, 7-10 parts of slag powder, 12-15 parts of fly ash, 2.8-3 parts of oxidized steel fiber, 1.8-2.2 parts of Fe3O4@SiO2 core-shell hydrophobic agent and 18-22 parts of quartz sand are mixed to obtain a mixed dry material; S2, by weight, 19-21 parts of water are firstly added. Add to the mixed dry material, then add 0.9-1.4 parts of high-efficiency water reducer and 0.4-0.6 parts of dispersant, mix well, and obtain UHPC material; S3, pour the UHPC material into a mold with a steel skeleton, vibration-assisted molding, curing, demoulding, and obtain a new UHPC tunnel jacking pipe; oxidized steel fiber is prepared by soaking steel fiber in sodium hypochlorite solution; Fe3O4@SiO2 core-shell hydrophobic agent is prepared by coating Fe3O4 magnetic nanoparticles with SiO2 shell layer, and then introducing a silane layer with amino group on the surface. The present invention ensures that UHPC has excellent mechanical properties (compressive strength, tensile strength) and water penetration resistance at the same time.

The invention discloses a lignin-based liquid mulching film as well as a preparation method and application thereof, the liquid mulching film is prepared by taking lignosulfonate as a main raw material, compounding the lignosulfonate with chitosan and polyvinyl alcohol to form a basic solution, then carrying out crosslinking modification by epoxy chloropropane and complexing treatment by tetrakis hydroxymethyl phosphonium chloride, and finally adding nano kaolin and uniformly stirring. When in use, the fertilizer is diluted with water and then sprayed on the surface of soil to form a uniform covering film. According to the invention, a phenylpropane structure of lignosulfonate is fully utilized as a rigid framework of a polymer, and the obtained mulching film has good film-forming property, hydrophobicity and heat preservation and moisture conservation performance through a tackifying effect of chitosan, a toughening effect of polyvinyl alcohol and synergistic modification of the cross-linking agent and the complexing agent. The addition of the nano kaolin further enhances the infrared barrier ability of the mulching film and reduces heat loss at night.

This utility model discloses a low-shrinkage joint structure suitable for bridge widening and reconstruction projects, belonging to the field of bridge reconstruction technology. Its key technical features include an old bridge main body, a new bridge main body, a buffer component, and a support component. A joint is pre-installed between the old and new bridge main bodies. The buffer component is located within the joint and includes a top plate, a bottom plate, and a buffer plate. The buffer plate abuts against the inner wall of the joint. A connecting column is fixedly connected between the top and bottom plates. Two symmetrically distributed sliding sleeves are fitted onto the connecting column, and a spring abuts between the two sliding sleeves. A connecting rod is hinged between the sliding sleeves and the buffer plate. The technical effect is that by setting up the buffer component and support component, cracks caused by rigid tension are avoided when the new bridge main body settles or shifts laterally. This flexible buffer mechanism can control the relative displacement at the joint within a safe range, effectively eliminating stepped misalignments on the bridge deck and ensuring driving safety and smoothness.

The present invention relates to a hollow fiber membrane in which the thickness L of a spherical structure layer is 60-500 µm (inclusive), the spherical structure layer has a first surface and a second surface, the average diameter Dai of the spherical structure in a region Sa1 10 µm or less from the first surface and the average diameter Db2 of the spherical structure in a region Sb2 10-20 µm from the second surface satisfy the relational expression Da1 > Dbz, and the spherical structure satisfies certain parameters.

The application belongs to the field of building construction, in particular to a deep foundation pit dewatering well sealing device, which comprises a base, a fixing frame is bolted on the top of the base, a winch is fixedly connected to the top of the fixing frame, a steel wire rope is fixedly connected to the winch, a first fixing seat is fixedly connected to the bottom end of the steel wire rope, an extension rod is fixedly connected to the bottom of the first fixing seat, a second fixing seat is fixedly connected to the bottom end of the extension rod, a cavity is formed in the first fixing seat and the second fixing seat, the fixing plate and the sealing plate are combined into an annular pipe by the above-mentioned setting, the annular pipe is attached to the inside of the dewatering well, which can block the groundwater, thereby facilitating subsequent control of the water level and subsequent well sealing steps, and can support the soft soil layer and reduce the occurrence of sand flow.

The utility model relates to the technical field of tunnel bridge engineering, and discloses a tunnel bridge roadbed anti-seepage reinforcing assembly which comprises a water tank, universal wheels are fixedly connected to the four corners of the bottom end of the water tank, a limiting plate is fixedly connected to the top end of the water tank, a reinforcing plate is arranged on one side of the limiting plate, and an L-shaped plate is fixedly connected to the top end of the reinforcing plate. A water drainage plate is fixedly connected to the position, close to the connecting position of one side of the bottom end of the L-shaped plate and the reinforcing plate, of the bottom end of the L-shaped plate, and a water guide pipe is movably connected to the outer wall, close to the front end, of the water drainage plate in a sleeved mode. And a screw rod is driven to move under thread engagement of a supporting seat, then a guide column and a limiting block are driven to move to the position, close to the bottom end, of the front side of a reinforcing plate, the bottom end of the reinforcing plate is extruded, the reinforcing plate is tightly attached to the bottom of the to-be-reinforced base face of the tunnel bridge, and the water seepage situation is reduced.

The invention discloses a modification method of an internal solid waste material of a warmer pad and a modified material, and the modification method comprises the following steps: taking out the internal solid waste material of the warmer pad, carrying out water washing treatment, mixing the internal solid waste material with a salicylic acid solution, and carrying out a reaction to obtain the modified material. According to the modification method, the internal solid waste material of the warmer pad is used as a raw material, the modified material which is large in specific surface area, multiple in active site, high in catalytic activity, stable in performance and environmentally friendly can be prepared through water washing and salicylic acid modification, and the modified material serves as a novel Fenton-like reaction catalyst with excellent performance and is widely used for activating an oxidizing agent; and meanwhile, resource utilization of the warmer pad waste can be achieved, the use value is high, and the application prospect is good. Meanwhile, the modification method disclosed by the invention also has the advantages of wide raw material source, low preparation cost, simplicity and convenience in operation, non-toxic and harmless product, environment friendliness and the like, and is suitable for large-scale production and application.

The invention provides a POE (Polyolefin Elastomer) composite adhesive film and a preparation method and application thereof, the POE composite adhesive film comprises a three-layer structure, an upper layer and a lower layer are bonding antiskid layers, a middle layer is a barrier layer, and the bonding antiskid layers adopt POE particles with high fat solubility; the high-fat-solubility POE particle additive is relatively high in adsorption capacity, so that the conditions of migration and surface of the additive can be greatly reduced, and slipping is reduced; silane and POE are combined in advance through the silane grafting material, so that the precipitation probability of the auxiliary agent is further reduced; ethylene modified resin is added into the barrier layer to improve the polarity and improve the hydrophobicity of the adhesive film, so that the adhesive film has lower water permeability, and the crosslinking density is improved by combining with compound acrylate, so that the water-resisting property of the whole adhesive film is greatly improved, the water vapor permeability in the use process is prevented, and the normal work of a battery piece is kept.

The invention provides a non-pre-crosslinking type white EVA adhesive film and application thereof. The non-pre-crosslinking type white EVA adhesive film is prepared from the following components: EVA particles, polyethylene, titanium dioxide, a crosslinking agent, an anti-hydrolysis agent, silane, an acid acceptor, acrylate, a light stabilizer and an antioxidant. Compared with a pre-crosslinking type white EVA adhesive film, the adhesive film provided by the invention has the advantages that the water permeability is reduced, the adhesive film can still keep relatively high adhesive force with glass after being moistened for 2000 hours, the yellowing value is relatively small after UV and damp-heat aging, the acetic acid content is low, and the use efficiency of an assembly can be ensured for a long time.

The application aims at the problem of long process connection time, and provides a highland tunnel waterproof and drainage integrated construction device, relating to the technical field of tunnel waterproof and drainage, comprising: a mobile trolley arranged along the longitudinal direction of the tunnel and provided with a walking mechanism at the bottom; a waterproof operation unit arranged at the front of the mobile trolley and comprising a waterproof plate winch mechanism, a hot melt welding mechanical arm and a grouting assembly, the waterproof plate winch mechanism is used for unwinding the waterproof plate, the hot melt welding mechanical arm is used for fixing the waterproof plate on the surface of the initial support of the tunnel, and the grouting assembly is used for injecting filling slurry between the waterproof plate and the initial support; the application realizes waterproof and drainage integrated construction, so that the waterproof layer and the drainage groove are constructed synchronously and seamlessly overlapped, and the leakage hidden danger of the joint caused by the separation of traditional processes is completely eliminated.

The invention relates to the technical field of coal yard construction, in particular to a coal yard terrace and a construction method thereof.The coal yard terrace comprises a foundation layer, a first sandy cohesive soil supporting layer, a first geotechnical cloth layer, a waterproof film layer, a second geotechnical cloth layer, a second sandy cohesive soil supporting layer and a gravel soil layer which are sequentially arranged from bottom to top; the foundation layer, the first sandy cohesive soil supporting layer, the second sandy cohesive soil supporting layer and the gravel soil layer are all compacted through road rolling equipment, the rolling pressure of the foundation layer, the rolling pressure of the first sandy cohesive soil supporting layer, the rolling pressure of the second sandy cohesive soil supporting layer and the rolling pressure of the gravel soil layer are gradually reduced, and the supporting strength of the foundation layer and the supporting strength of the first sandy cohesive soil supporting layer are high; the second sandy cohesive soil supporting layer and the gravel soil layer have water permeability, coal water is isolated by the waterproof membrane layer, pollution of the coal water to soil below the terrace is avoided, the first geotechnical cloth layer and the second geotechnical cloth layer can prevent the waterproof membrane layer from being punctured, the construction cost is low, and the soil below the coal yard can be prevented from being polluted.

An anion exchange membrane having an anion exchange resin layer (3) reinforced by a base sheet (5), characterized in that the anion exchange resin layer (3) contains an anion exchange resin having a pyridinium group obtained by protonating a pyridyl group as an anion exchange group and a vinyl chloride resin as a thickening agent, and the base sheet (5) is a polyethylene woven fabric.

The invention provides a POE packaging adhesive film and a preparation method and application thereof.The POE packaging adhesive film comprises a POE composite adhesive film and micro-crosslinking layers formed on the upper surface and the lower surface of the POE composite adhesive film through crosslinking, the micro-crosslinking layers are formed on the upper surface and the lower surface of the POE composite adhesive film, and micro-network structures are formed on the surfaces of the micro-crosslinking layers, so that precipitation of auxiliaries can be inhibited, and the service life of the POE packaging adhesive film is prolonged. The surface friction coefficient is increased; and the problem of POE slipping is solved while the reliability of the adhesive film is not reduced.

The application provides a photovoltaic module connecting and mounting structure, which comprises at least two adjacent photovoltaic modules, each of which comprises photovoltaic module glass, a corrugated back plate and a frame, the photovoltaic module glass and the corrugated back plate are bonded by structural adhesive to form a bearing unit, a prefabricated silicone strip is clamped into the bearing unit in the direction of the long side of two sides, a preset hole is arranged on the frame, a rivet is installed through the preset hole and an angle code, a structural weld is formed by laser welding a stainless steel welding wire at the joint of the frame and the corrugated back plate, a sealant is filled in the gap between the folded edge of the corrugated back plate and the photovoltaic module glass, a penetrating self-drilling screw hook fixing piece is arranged between the frame bending grooves of two adjacent photovoltaic modules, and the penetrating self-drilling screw hook fixing piece is clamped and limited to a lower support piece through a self-tapping screw.

This invention discloses an adhesive for repairing photovoltaic (PV) modules, a preparation method thereof, and a method for repairing PV modules. The adhesive includes: a first adhesive, or a first adhesive and a second adhesive; when both are present, the second adhesive and the first adhesive are stored independently. The first adhesive includes: a glue prepolymer formed by the reaction of multiple raw materials; the multiple raw materials include at least 100 parts of epoxy acrylate resin, 3-5 parts of an organometallic catalyst, and 8-15 parts of a compound containing diisocyanate groups. The second adhesive includes liquid silica gel and fumed silica dispersed in the liquid silica gel; the liquid silica gel includes α,ω-dihydroxypolydimethylsiloxane, methyl silicone oil, a crosslinking agent, a coupling agent, a diluent, and a catalyst. Through the synergistic effect of the components in the first adhesive, this adhesive possesses toughness, high strength, and low water permeability, ensuring the reliability of the adhesive in repairing PV modules.