102results about How to "To achieve the repair effect" patented technology

The invention relates to a thiol-aldehyde group cross-linked hydrogel material, a preparation method and applications thereof. The preparation method comprises: dissolving a component A thiol-containing polymer derivative in a biocompatible medium to obtain a solution A; dissolving a component B aldehyde group-containing polymer derivative in a biocompatible medium to obtain a solution B; and mixing with the solution A and the solution B to obtain the hydrogel, wherein the hydrogel has plasticity at the initial stage of cross-linking, can form a removable hydrogel system at the later stage ofcross-linking, and can form an interpenetrating network hydrogel system with enhanced mechanical property, a component C and / or a component D can be added to the hydrogel precursor solution, the component C is a double bond-containing substance or an amino-containing substance or a substance containing a double bond and amino, and the component D is a tissue repairing beneficial ingredient. The invention further provides a kit for preparing the hydrogel, applications of the hydrogel in tissue engineering and regenerative medicine, 3D cell culture, 3D printing, and applications of the hydrogelas cell carriers, protein carriers or drug carriers.

The present invention relates to superfine magnetic carrier particle with compound function and its preparation process. It is a kind of complex with three-layered core-shell structure including the first layer of ferric oxide, the second layer of polymer carrier material and the third layer of bioactive functional preparation. It has the compound functions of magnetic positioning, biological targeting positioning and controlled medicine release. The preparation process includes the following steps: preparing of super-paramagnetic superfine particle, covering the superfine carrier particle with bioactive functional preparation via physical coagulation and chemical linkage. The preparation process can prepare superfine magnetic carrier particle with compound function in 40-80 nm size and with narrow size distribution, good targeting property, controlled medicine release and thus important application foreground in local medicinal treatment and diagnosis carrier preparation.

The invention provides a display panel and a patching method thereof, which are suitable for the field of display panels. The display panel comprises a plurality of signal wires, at least one first patching wire and at least one second patching wire, wherein the first patching wire and the second patching wire are respectively arranged both relative sides of the signal wires and respectively partly overlapped with the signal wires. The patching method of the display panel comprises the following steps: electrically connecting the rupturing signal wires and the first patching wire; electrically connecting the rupturing signal wires and the second patching wire; and utilizing a flexible conductive component to electrically connect the first patching wire and the second patching wire. The display panel and the patching method thereof can be used for patching the signal wires to prevent the display panel from being directly damaged and lead to the low transmission impedance of signals after the signal wires are patched, thereby ensuring the signal transmission quality and the patching success ratio of the signal wires.

The invention relates to a method for repairing arsenic-polluted soil by inducing active iron and manganese oxides through bacteria under aerobiotic / microaerobic conditions. The method comprises the steps of selecting a Pseudomonas putida strain (MnB1, ATCC 23483), culturing the strain in a culture medium containing manganese carbonate for 3-10 days until a brownish black flocculent product is generated by bacterial induction, then adding a metabolite in arsenic-polluted soil, and culturing for 3-21 days under the aerobiotic / microaerobic conditions. Under the effect of bacterial metabolites, arsenic which is in an exchangeable form in the soil can be transformed into arsenic which is in a residue form, migration and bioavailability of arsenic in the soil are reduced, and the arsenic in thesoil is fixed effectively. The process is simple to operate, low in treatment cost, wide in application range and free of secondary pollution.

The invention relates to a preparation method of a leakage blocking auxiliary agent in the field of oil field well drilling. The method comprises the following steps of (1) firstly weighing a certainamount of acrylamide, 2-acrylamide-2-methallyl sulfonate, N,N-methylene bisacrylamide and initiators; putting the materials into a reactor; adding the corresponding amount of distilled water and ice water bath; performing stirring to complete dissolution; (2) slowly adding enhancing agents and hydrophobic monomers; performing low-temperature stirring; introducing N2 for protection; (3) lowering the temperature to 0 to 10 DEG C; dripping an initiator solution; (4) after the dripping completion, continuously performing stirring for 15min; raising the temperature to 50 DEG C; performing still state reaction for 2 to 5h to obtain an elastic gel body; (5) taking out the elastic gel body; performing vacuum drying at 60 to 90 DEG C and shearing to obtain a delay water absorption expansion leakageblocking agent product. The method has the advantages that the obvious delay expansion features are realized; the expansion in a shaft is slow; after reaching the leakage zone, the expansion can be continuously performed, so that the leakage zone can be effectively improved; the restoration effect is achieved.

The invention discloses a crack repairing structure capable of being easily, conveniently and quickly constructed and a construction method thereof. The problem that due to large viscosity of water glass, cement and the like, the filling repairing effect is poor is solved. According to the technical scheme, the crack repairing structure is characterized in that the crack repairing structure comprises a wall with a crack and a V-shaped long groove which is formed in the wall along the length of the crack and communicates with the crack; the V-shaped long groove is internally filled with a plurality of mutually-wound filling wires; an ultraviolet curing glue layer for sealing an opening is arranged in the position, located at the opening of the V-shaped long groove, of the wall in an attached mode; a flow guiding hole and an air guiding hole formed above the flow guiding hole are formed in the ultraviolet curing glue layer; the V-shaped long groove is internally filled with epoxy resin glue mixed with a curing agent through the flow guiding hole; and after the epoxy resin glue is cured, epoxy curing repairing layers which are arranged in the V-shaped long groove and the crack in a filled mode are formed. All positions of the crack can be filled, and seam sizes not filled with repairing materials are decreased in the repairing process.

The invention relates to a laser repairing method for repairing the cracks of an ultrahigh temperature ceramic coating on a C / C composite material. At first, the cracks on the surface of a SiC-ZrC-Al2O3 coating are preprocessed; and then a laser cladding technology is adopted to effectively fill the cracks by an Al2O3 / ZrO2 dual oxide eutectic ceramic coating so as to repair the cracks. The laser cladding method is used to prepare the Al2O3 / ZrO2 dual oxide eutectic ceramic coating locally, and has the advantages that (1) the cracks in the original coating can be fulfilled effectively, the service life of a sample is prolonged, and the disastrous complete failure is avoided; and (2) the eutectic ceramic coating generated by a laser direction solidification technology has an excellent anti-oxidation performance and excellent high temperature mechanical properties, and well protects a C / C composite material. Compared with other repairing method, the technology has the advantages of simpleoperation, rapid processing, precise control, few required materials, and low cost, and is accord with the green and energy saving trends.

The present invention provides a method and a device for repairing semiconductor chips. The method includes providing an LED module that includes a circuit substrate and a plurality of light-emittingunits disposed on the circuit substrate, at least one of the light-emitting units being a bad light-emitting unit; projecting a laser light source generated by a laser generating module onto the bad light-emitting unit so as to decrease the bonding strength between the bad light-emitting unit and the circuit substrate; removing the bad light-emitting unit from the circuit substrate by a chip pick-and-place module so as to form a vacancy; placing a good light-emitting unit inside the vacancy by the chip pick-and-place module; and then electrically connecting the good light-emitting unit to thecircuit substrate. Therefore, the bad light-emitting unit can be replaced by the good light-emitting unit so as to achieve the repair effect.

The invention discloses a software protection device resetting method and apparatus, relates to the technical field of data encryption, and aims to how to reset a software protection device through a remote server. The method comprises the steps of obtaining a resetting data package from the server by utilizing a computer connected with the software protection device, and importing the resetting data package into the software protection device, wherein the resetting data package contains a resetting command corresponding to the software protection device; analyzing the resetting data package according to a built-in key by the software protection device to obtain the resetting command; calling a built-in interface program by the software protection device, wherein the interface program is used for performing a query on a file stored in the software protection device; and according to the resetting command, resetting the file stored in the software protection device and queried by the interface program through the software protection device. The resetting method and apparatus is suitably applied to the resetting of the software protection device.

The invention provides a hydraulic power self-stabilization type underwater construction cofferdam. The cofferdam is formed by splicing a plurality of water stop modules. Each water stop module comprises a baffle and a rubber bottom plate, wherein a steel pressing plate is arranged on the periphery of the upper portion of the rubber bottom plate, the rubber bottom plate is internally provided witha plurality of ventilation holes, a steel plate combined structure is adopted in the baffle, the baffle is internally provided with a plurality of transverse steel beams and a plurality of vertical air guiding pipes, and the top of the baffle is provided with air guiding holes. The upper ends of the air guiding pipes are connected to the air guiding holes, and the lower ends of the air guiding pipes communicate with the ventilation holes. A plurality of steel plates are combined and fixed through the transverse steel beams, the bottoms of the baffles are fixed to the rubber bottom plates, andhydraulic telescopic rods are arranged between the steel pressing plates and the upper ends of the baffles. The hydraulic power self-stabilization type underwater construction cofferdam has the beneficial effects that by means of the device, on the premise that normal running of a water delivery channel is not influenced, the temporary construction cofferdam is constructed at the local damage position in a riverway, local repairing and pouring of concrete are finished, the beneficial effects of mobility and convenient mounting and dismounting are achieved, enough structure stability and anti-skid stability are achieved, the repeated utilization performance of the equipment is good, the manufacturing cost is low, and good development space is achieved in future.

The invention relates to the technical field of building materials, in particular to self-repairing steel slag and slag concrete and a preparation method thereof. The self-repairing steel slag and slag concrete is prepared from, by mass, 4-6 parts of porous hydroxyapatite capsules, 20-40 parts of steel slag, 0.1-0.2 part of water reducing agent, 60-80 parts of slag, 5-7 parts of sodium carbonate,3-5 parts of carbide slag dry powder and a proper amount of water. The steel slag and the slag are used as cementing materials to replace cement, so that the cost is reduced, the environmental pollution is reduced, and the strength grade of ordinary Portland cement 42.5 is reached; compared with strong base, carbide slag, sodium carbonate and other weak bases are added, cost reduction is facilitated, and environment pollution is avoided; meanwhile, the carbide slag can react with silicon dioxide and aluminum oxide in steel slag and mineral slag to generate hydrated calcium silicate and hydrated calcium aluminate; and due to the slow release effect of the porous hydroxyapatite capsule, material waste can be avoided, and the porous hydroxyapatite capsule is an intelligent repair material capable of being used for a long time.

The invention discloses a method for manufacturing carbon and carbon fertilizers by the aid of straw. By the aid of the method, the carbon and the carbon-based active organic fertilizers which are beneficial to crop growth can be manufactured for ratios of soil structures according to characteristics of local soil. The method has the advantages of energy conservation, environmental protection, simplicity in operation, easiness in learning and high biomass comprehensive utilization rate.

The invention discloses a concrete repairing material. The concrete repairing material is prepared from the following components in percentage by mass: 40 to 50 percent of ultrafine cement, 2 to 4 percent of micro-silicon powder, 40 to 45 percent of redispersible latex powder, 4 to 6 percent of Huaqiansu (special master batch for a grouting material), 0.05 to 0.1 percent of polyvinyl alcohol 2488,0.2 to 0.4 percent of hydroxypropyl methylcellulose, 0.05 to 0.2 percent of polyacrylamide, 0.1 to 0.5 percent of ammonium ferrous sulfate, 2 to 4 percent of tung oil and 0.2 to 0.5 percent of methylphenylcyclotrisiloxane. According to the concrete repairing material disclosed by the invention, the ammonium ferrous sulfate, the tung oil, the methylphenylcyclotrisiloxane, the ultrafine cement, theredispersible latex powder and other raw materials are mixed, so that the problems of an existing concrete repairing material that the quality cannot be ensured, the bonding strength with a previousconcrete bonding surface is poor, a whole block is easy to peel off and the like can be solved.

The invention provides application of a carbonate-mineralization microbe in decreasing the content of effective-state cadmium in soil and a method, and relates to the technical fields of resources andenvironment. According to the carbonate-mineralization microbe, it is found that the content of the effective-state cadmium in the soil can be effectively decreased through experiments, and meanwhilethe carbonate-mineralization microbe is high in endurance capacity and can adapt to a bad living environment. According to the method for decreasing the content of the effective-state cadmium in thesoil through the carbonate-mineralization microbe, carbonate-mineralization microbe liquid, the soil to be remedied and nutrient substances are mixed in proportion and then cultivated, a remedying effect can be achieved, operation is easy, and the cost is low. Heavy metal contamination is remedied by adopting the microbe, no secondary contamination is generated, and the carbonate-mineralization microbe has a wide application prospect in the aspect of heavy metal contamination remediation of the soil.

The invention relates to the field of soil remediation, in particular to a mining area soil remediation agent and a preparation method and application thereof. The mining area soil remediation agent is prepared through the following steps: carrying out the aeration fermentation heating and thermophilic microbial agent fermentation on sludge to obtain decomposed sludge, enriching bacteria from plant root soil naturally growing in a lead-zinc mining area, and carrying out the selective culture on the enriched bacteria through a selective culture medium containing rhizosphere soil leaching liquorto obtain aninoculant with the resistance to the heavy metal, and carrying out the propagation to obtain a phosphate solubilizing bacteria agent; and mixing the decomposed sludge and the phosphate-solubilizing microbial inoculum in proportion to obtain the mining area soil remediation agent. According to the invention, on the one hand, soil can be improved, a remediation layer conforming to preparation and growth is constructed; on the other hand, all the components have a synergistic effect, so the seed germination rate in the remediation process is increased, vegetation growth is promoted,and the plant disease and insect pest resistance is improved.

The invention discloses a method for reducing nitrate content of vegetables under protected cultivation conditions. A strain of soil nitrate conversion bacteria is separated from greenhouse soil for protected planning for many years, and is called as Bacillus pumilus through classification, the number of the bacterial strain is SrN7, and the preservation number is CGMCC No. 9685. The microorganism strain is mixed with bran to prepare a microorganism bacterium agent after activation, enlarging cultivation and fermentation treatment, and the obtained microorganism bacterium agent is applied to soil at the roots of target vegetables. The obtained bacterium agent is a pure biological agent and is harmless for the body and the environmental health, the concentration of nitrate in protected soil can be reduced, so that the content of the nitrate in vegetable bodies is reduced, the plant growth can be promoted, and the basic physicochemical property of the soil is improved; compared with other methods for reducing the nitrate of the protected soil, under the precondition of not influencing normal production, the content of the nitrate in the soil can be reduced while production, and the effect of repairing while production is achieved.

The invention relates to the technical field of computer technology development, and discloses a case flatness detection device for computer technology development, which comprises a movable box, the top of the movable box is fixedly connected with an inflation box, and inflation pipes are fixedly connected to the upper portion of the right side and the lower portion of the left side of the inflation box correspondingly. The opposite sides of the two inflation pipes are fixedly connected with air bags. A first connecting rod is inserted into the bottom of the movable box; the bottom of the first connecting rod is rotationally connected with a roller; the top of the first connecting rod is fixedly connected with a movable block; the top of the movable block is fixedly connected with a second connecting rod; and the top of the second connecting rod is fixedly connected with a piston. When the rollers walk on the surface of the case, the rollers can drive the pistons to move up and down along with the concave-convex surface of the case under the action of extruding the springs so as to inflate and expand the air bag; when the concave-convex fluctuation of the surface of the case is large, more air is inflated into the air bag, and therefore the concave-convex degree of the surface of the case can be visually displayed according to the size of the air bag.

The invention provides a test method for simulating restoration of a deformation sleeve under stratum confining pressure. The test method is characterized in that a universal hydraulic tester with a YS32-500 tetragonal column is used to generate external force by moving back and forth up and down, an impact reshaping tool fixed at the top center of the hydraulic tester is allowed to be fixed on the deformation sleeve right at the center of the bottom of the hydraulic tester by impact at certain speed, and reshaping force required in restoring the deformation sleeve and tension required by a lifting tool after reshaping of the impact reshaping tool can be tested by a strain plate and a static strain gauge in reshaping process. The deformation sleeve is provided with a clamping tool at a deformation section, and test of restoration of the deformation sleeve under specific confining pressure can be simulated by adjusting magnitude of torque of a bolt on the deformation sleeve. Restoration of the downhole deformation sleeve can be simulated truly, test result is accurate, and accurate construction parameters can be provided for restoration of the sleeve by a pear-shaped tube expander. The test method is suitable for the technical field of oil, natural gas downhole sleeve restoration.

The invention relates to a high-temperature-resistant slow-expansion water-absorbing expansion resin plugging aid used in the field of oilfield drilling. The preparation method comprises: putting water into a reaction tank, adding bentonite, completely dispersing, sequentially adding acrylamide, acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid, completely dissolving, introducing nitrogenat a low temperature, sequentially adding a cross-linking agent and an initiator, heating to 30-70 DEG C, reacting for 2-5 h, drying, granulating, and screening; and adding a wrapping agent and a solvent into the reactor, slowly heating, adding a water-swelling resin after the wrapping agent is completely dissolved, and removing the solvent after the reaction is finished so as to obtain the high-temperature-resistant slow-expansion water-absorbing expansion resin. According to the invention, the obtained product can slowly expand in the early stage of water absorption, can rapidly achieve water absorption expansion within a short time in the later stage, has a delay time of longer than 1 h, has temperature resistance of 140 DEG C, can effectively plug at a high temperature, and can achieve good repairing effect.

The invention discloses a preparation method and application of a hyperbranched polyester based polyurethane medical adhesive. The preparation method comprises the following steps: 1) taking hydroxyl-terminated hyperbranched polyester and acryloyl chloride to react, and obtaining a series of double-bond modified precursors 1 through a regulation and control ratio, wherein the mol ratio of -OH in the hydroxyl-terminated hyperbranched polyester to the acryloyl chloride is 1 to (2 to 4); 2) feeding diisocyanate and polyethylene glycol according to the mol ratio of 2 to 1 and reacting to obtain aprecursor 2; 3) taking the precursor 1 and the precursor 2 to react according to the ratio of a -OH functional group number of the precursor 1 to a -NCO functional group number of the precursor 2 of 1to (1.1 to 2.0), so as to obtain a double-bond-containing hyperbranched polyester based polyurethane medical adhesive; 4) uniformly mixing the hyperbranched polyester based polyurethane medical adhesive with 0.1 to 0.5 weight percent of photoinitiator i2595 and preserving in a dark place for later use. The medical adhesive prepared by the preparation method has no toxicity and harms, good biocompatibility and a strong chemical adhesive force on human tissues.

The invention, which relates to the technical field of pavement compactness detection, discloses pavement base compactness detection equipment capable of filling a detected part. The equipment comprises a shell; a hollow channel is fixedly connected to the interior of the shell; and an extrusion mechanism is movably connected to the inside of the hollow channel. A sample groove is fixedly connected to the left side of the hollow channel. A rotating plate is movably connected to the right side of the hollow channel; and a supply box is fixedly connected to the surface of the rotating plate. A drill bit is movably connected to the lower end of the hollow channel. When the drill bit finishes drilling and moves upwards, a reset spring resets and pulls a guide wheel downward; gas in an air bagcan be released; and repairing liquid in a layering box is extruded out, so that a sample is taken out and is repaired. When the repairing liquid in the layering box is completely released, a base material entering a discharging opening pushes the rotating plate to move upwards and extrudes the repairing liquid in the supply box, so that the supplying for the layering box is realized.

The invention belongs to the technical field of the environmental protection, and particularly relates to an environment-friendly fertilizer containing a chlorella functional component and a preparation technology thereof. The preparation technology for the environment-friendly fertilizer containing the chlorella functional component comprises the following steps: S1 taking a chlorella raw material, adding saccharose and yeast powder, fermenting, to obtain the chlorella raw material with high content; S2 enabling the chlorella raw material with the high content to be mixed with a solvent, to obtain chlorella diluent, adding an activating agent, performing rehydration, to obtain rehydration chlorella diluent; S3 adding a protective agent to the rehydration chlorella diluent, homogenizing, to obtain wall-breaking chlorella solution; S4 successively adding cellulase, pectinase, alkaline protease and fucosidase to the wall-breaking chlorella solution, performing the classification enzymolysis, to obtain original chlorella solution; and S5 vacuum-concentrating the original chlorella solution, to obtain the fertilizer. The environment-friendly fertilizer containing the chlorella functional component is abundant in nutrition, and capable of effectively extracting and keeping bioactive substances in the chlorella, low in production cost, easy to control in production process, and beneficial to large-scale industrialized production.

The invention discloses a preparation method of a chiral supramolecular hydrogel skin ointment for bacteriostatic repair, which belongs to the technical field of a medicinal preparation. The preparation method comprises the following steps: respectively dissolving the chiral supramolecular hydrogel, a worm extract and borneol in pure water, respectively obtaining the chiral supramolecular hydrogelaqueous solution, a worm extract aqueous solution and a borneol aqueous solution, after beeswax and liquid paraffin are heated and melted, mixing the chiral supramolecular hydrogel solution, the wormextract aqueous solution and the borneol aqueous solution, and stirring a mixture to a shaping state to obtain the chiral supramolecular hydrogel skin ointment for bacteriostatic repair. The productdoes not contain hormones and has no toxic or side effects, can be applied to a wide range of uses, and can effectively inhibit the erosion of bacteria on the skin and further achieve the repair effect. The product components are mild, smooth and moist, and can maintain the antibacterial repair effect while lubricating and moisturizing.

The invention belongs to the technical field of remediation of heavy metal contaminated soil, and particularly relates to a soil smoldering technology for treatment and remediation of heavy metal co-contaminated soil. The soil smoldering remediation method mainly comprises the following steps: plant straws are covered with soil to form a covered body; the outer layer is a soil layer, and the straws or a mixture of straws and soil are arranged inside; the inside is kept in an anaerobic condition, and the soil smoldering treatment is then carried out. Through solidification, absorption, chelation, complexation and other various reactions, the heavy metal co-contaminated soil treated by applying the technology provided by the invention achieves a reduced proportion of chemical forms which can easily migrate and diffuse to the environment, and an increased proportion of chemical forms which are difficult to release to the environment. Therefore, environmental and ecological risks from heave metals are reduced. The technology provided by the invention can simultaneously fix multiple heave metals, reduce the heave metal absorption and accumulation by plants, effectively kill various pathogenic bacteria in soil and increase the biomass of crops, and is a simple, high-efficient, easy-to-operate and low-cost in-situ remediation technology for heavy metal co-contaminated soil.

The invention provides a menstrual blood-derived endometrial stem cell preparation, which comprises platelet-rich plasma and menstrual blood-derived endometrial stem cells. A preparation method of themenstrual blood-derived endometrial stem cell preparation comprises (1) preparing platelet-rich plasma; (2) preparing menstrual blood-derived endometrial stem cells; and (3) preparing the menstrual blood-derived endometrial stem cell preparation. The menstrual blood-derived endometrial mesenchymal stem cells are prepared and are matched with the platelet-rich plasma, so that mutual promotion canbe effectively achieved; the menstrual blood-derived endometrial stem cell preparation is suitable for preparing skin injury treatment medicaments, allows a wound to heal faster and better, can repairinjured skin better, can ease the pain of patients, and has excellent effects.

The invention relates to the technical field of skin care products, in particular to facial cream with a function of brightening skin color. The facial cream comprises an A-phase component, a B-phase component, a C-phase component, a D-phase component and an E-phase component. The facial cream with the function of brightening skin color is prepared by a compound formula which selects alpha-arbutin, nicotinamide, phenylethyl resorcinol and centella asiatica extract as main functional additives and multiple natural extracts; in the using process, the facial cream is mild and non-irritant, has the effects of brightening skin color to achieve the functions of whitening skin and regulating skin, can improve the barrier function of the skin, achieves the repairing effect, is mild and non-irritant in the using process, can be used for deeply moistening and nourishing skin, enables the skin to be smooth and glossy, and improves the state of poor skin color caused by solarization, aging, environmental pollution and the like.

The invention discloses an experimental device and method for organic contaminated soil remediation by coupling resistance heating with microorganisms. The experimental device comprises an electrode assembly, a quartz glass tube, a gas sampling assembly, a front sealing end piece, a rear sealing end piece, a thermocouple, a power supply, a water inlet pipe, a water outlet pipe, an automatic temperature feedback controller and a microbial remediation liquid preparation assembly. The method comprises the following steps: filling two thirds of the quartz glass tube from a front end opening to a rear end opening with organic contaminated soil, and filling the rest one third of the quartz glass tube with clean fine sand to serve as a descending gradient area; removing organic pollutants in theorganic contaminated soil by combination of heating the organic polluted soil by the electrode assembly, and injecting a microbial remediation solution into the organic contaminated soil in the quartzglass tube by the microbial remediation solution preparation assembly, and the organic contaminated soil is remediated. According to the device, organic pollutants in the organic contaminated soil are effectively removed in a manner of coupling electric heating and microbial remediation, and then the mechanism that the organic pollutants are jointly treated through electric heating and microbialremediation is conveniently studied.

The invention relates to the field of concrete protection, and particularly discloses aconcrete freeze-thaw-resistant composite protective agent and a preparation method of the freeze-thaw-resistant composite protective agent. The concrete freeze-thaw-resistant composite protective agent is prepared from the following raw materials: silica sol, alkyl siloxane, a silane coupling agent, n-octylamine, a nonionic emulsifier and a microbial self-repairing agent. The preparation method comprises the following steps: preparing raw materials in proportion, and uniformly mixing the silica sol, the alkyl siloxane and the nonionic emulsifier to obtain a primary mixed solution; adding the silane coupling agent into the primary mixed solution, uniformly stirring, dropwise adding the catalyst n-octylamine, and continuously stirring until transparent and stable sol is obtained; adding water into the sol in a stirring state, and stirring to obtain an emulsion mixed solution; and mixing the mixed solution with the microbial self-repairing agent, and uniformly stirring to obtain the freeze-thaw-resistant composite protective agent. The composition can be used for freeze-thaw resistance protection ofconcrete, and has the advantages of improving the freeze-thaw resistance of the concrete and repairing the column fraction of the concrete.

The invention relates to the field of soil remediation methods, and particularly discloses a remediation method for heavy metal contaminated soil, according to the remediation method, high heavy metals in the soil are enriched and converted through a bioremediation agent, the toxicity of the heavy metals in the soil is reduced, then the heavy metals in the soil are passivated through a passivating agent, and the toxicity of the heavy metals is generally reduced, and finally, restoring of the soil fertility by using an organic fertilizer is carried out, and further treating of the heavy metals remaining in the soil is carried out by using the organic fertilizer. According to the method, the heavy metal contaminated soil is remedied through progressive step-by-step treatment, the content of toxic heavy metal in the soil is effectively reduced, especially, an efficient conversion effect on mercury in the soil is achieved, and finally remediation of the soil is achieved.

The invention discloses a soil remediation agent capable of passivating heavy metals in soil and a preparation method for the soil remediation agent. According to the soil remediation agent and the preparation method therefor, the soil remediation agent with an efficient remediation action on the heavy metals in the soil is obtained through blending biochar, bentonite and magnesium oxide accordingto a specific dosage ratio, the three ingredients have a synergistic passivating effect on the heavy metals in the soil through being combined together at the specific ratio, particularly, the effective-state content of heavy-metal cadmium in the soil can be efficiently lowered, and the content of effective-state cadmium can be lowered by 55% to 60% in one month. Through remedying heavy-metal contaminated soil by employing the soil remediation agent disclosed by the invention, the soil remediation agent has the advantages that the remediation cost is low, the operation is simple, the maintenance is convenient, and the like.