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Geopolymers are inorganic, typically ceramic, materials that form long-range, covalently bonded, non-crystalline (amorphous) networks. Obsidian (volcanic glass) fragments are a component of some geopolymer blends. Commercially produced geopolymers may be used for fire- and heat-resistant coatings and adhesives, medicinal applications, high-temperature ceramics, new binders for fire-resistant fiber composites, toxic and radioactive waste encapsulation and new cements for concrete. The properties and uses of geopolymers are being explored in many scientific and industrial disciplines: modern inorganic chemistry, physical chemistry, colloid chemistry, mineralogy, geology, and in other types of engineering process technologies. Geopolymers are part of polymer science, chemistry and technology that forms one of the major areas of materials science. Polymers are either organic material, i.e. carbon-based, or inorganic polymer, for example silicon-based. The organic polymers comprise the classes of natural polymers (rubber, cellulose), synthetic organic polymers (textile fibers, plastics, films, elastomers, etc.) and natural biopolymers (biology, medicine, pharmacy). Raw materials used in the synthesis of silicon-based polymers are mainly rock-forming minerals of geological origin, hence the name: geopolymer. Joseph Davidovits coined the term in 1978 and created the non profit French scientific institution (Association Loi 1901) Institut Géopolymère (Geopolymer Institute).
Layered pore structure geopolymer based on combination of multi-stage low-temperature in-situ polymerization and ice template method and preparation method thereof
The invention discloses a layered pore structure geopolymer based on combination of multi-stage low-temperature in-situ polymerization and an ice template method and a preparation method of the layered pore structure geopolymer. The preparation method comprises the following steps: preparing geopolymer slurry; performing one-way freezing on the slurry to form a frozen green body containing a directionally arranged ice crystal template; before the frozen green body is subjected to freeze drying to remove an ice crystal template, specific multi-stage low-temperature in-situ polymerization treatment is carried out, and the treatment comprises at least two different low-temperature heat preservation stages which are sequentially carried out within the temperature range of-10 DEG C to + 5 DEG C, and the temperature of the low-temperature heat preservation stages is gradually increased; and then the treated green body is subjected to freeze drying and maintenance. According to the method, the multi-stage low-temperature in-situ polymerization step aiming at the reaction characteristics of the geopolymer is introduced before the ice crystal template is removed, so that the problems of low mechanical property and unstable pore structure of the geopolymer prepared by a traditional ice template method are solved, and the mechanical strength and structural integrity of the product are remarkably improved; meanwhile, a good layered pore structure and pore channel connectivity are kept.
Owner:SOUTH CHINA UNIV OF TECH
Garbage incineration fly ash geopolymer composite material and preparation method thereof
The invention relates to the technical field of solid waste treatment and recycling, and discloses a waste incineration fly ash geopolymer composite material and a preparation method thereof, and the composite material is prepared from waste incineration fly ash, apatite minerals, zero-valent iron powder, persulfate and an alkali activator. The preparation method comprises the following steps: mixing the waste incineration fly ash, apatite minerals, zero-valent iron powder and persulfate to obtain composite powder; performing frequency conversion mechanochemical synergistic activation on the composite powder, wherein the activation process comprises a low-temperature activation stage and a high-energy pulse activation stage; and finally, mixing the activated powder with an alkali activator, pouring, molding and curing. According to the method, the reduction reaction and the oxidation reaction are driven step by step in the same system by regulating and controlling the mechanical energy input time sequence, the compatibility problem of a reducing agent and an oxidizing agent is solved, different types of persistent organic pollutants are synergistically degraded, meanwhile, heavy metal is stabilized, and the treatment effect is good. And the fly ash is recycled to prepare a geopolymer material with mechanical properties.
Owner:SICHUAN ENERGY SAVING & ENV PROTECTION INVEST CO LTD +1
Nano composite filling material based on in-situ acid-base mutual modification enhancement and application thereof
The invention belongs to the technical field of industrial solid waste resource recycling, and discloses a nano composite filling material based on in-situ acid-base mutual modification enhancement and application thereof. According to the nano composite filling material, the alkalinity of the red mud and the acidity of the desulfurized gypsum are used for neutralization, the alkalinity of a system is reduced, a synergistic reaction is excited, a large number of ettringite crystals playing a key enhancing role are generated under the regulation and control of a nano material, and the ettringite crystals and a geopolymer form an interpenetrating network structure. The obtained slurry is low-viscosity and high-fluidity Newtonian fluid (diffusivity gt and 250 mm), the 7-day strength is larger than 2.0 MPa, the pH value is 7-9, and the fluorine ion concentration is lt; and the leaching of heavy metal ions is qualified, and the method is environment-friendly and safe. Efficient resource utilization of the red mud and the desulfurized gypsum is achieved, and the method is simple in process, low in cost and especially suitable for mine filling and engineering backfilling.
Owner:HUBEI KECHUANGQI NANOTECHNOLOGY CO LTD
Modified silicon carbide fiber as well as preparation method and application thereof
The invention relates to a modified silicon carbide fiber and a preparation method and application thereof, the modified silicon carbide fiber endows magnetic loss, and combines high strength and corrosion resistance of a geopolymer matrix to realize double improvement of mechanical properties and wave absorbing efficiency of concrete. Carbon fibers in conventional wave-absorbing concrete are replaced by modified silicon carbide fibers, so that on one hand, the wave-absorbing concrete has good oxidation resistance at high temperature, carbon emission is greatly reduced, and the wave-absorbing concrete has the advantages of energy conservation and environmental protection; and on the other hand, the defect that the performance is reduced at high temperature is overcome, and the modified silicon carbide fiber enables the magnetic loss of metal and the dielectric loss of a matrix to form a synergistic effect, so that the wave absorbing performance is greatly improved. The invention is suitable for green communication infrastructures, and has the characteristics of environmental protection, high durability and broadband wave absorption.
Owner:HUNAN INSTITUTE OF ENGINEERING
Sulfate-erosion-resistant metakaolin-slag-based geopolymer concrete and preparation method thereof
The invention discloses sulfate-erosion-resistant metakaolin-slag-based geopolymer concrete, belongs to the technical field of concrete, and aims to solve the problems that the corrosion resistance of traditional silicate concrete is ineffective and the adaptability of conventional alkali-activated concrete is insufficient in a special environment. The concrete comprises the following components in parts by weight: 60-90 parts of a cementing material, 120-170 parts of aggregate, 15-30 parts of a composite activator, 2-8 parts of a function regulator and the like, the cementing material is prepared from nano TiO2 / KH-550 composite modified metakaolin, slag and silica fume-coal gangue powder-HAP composite powder; the aggregate comprises modified limestone macadam (soaked and dried by a sodium dihydrogen phosphate solution) and river sand; the composite exciting agent comprises water glass, sodium hydroxide, sodium pyrophosphate, propylene glycol and the like; the function regulator comprises superfine fly ash, a naphthalene water reducer, HPMC (Hydroxy Propyl Methyl Cellulose) and boric acid. Through the synergistic effect of the components, the sulfate corrosion resistance, the mechanical property and the environmental adaptation performance of the concrete are improved, and the concrete is suitable for engineering construction under the service environment of high-concentration sulfate and the like.
Owner:绵竹市铸诚混凝土有限公司
Geopolymer alkali activator based on red mud raw material and preparation method thereof
The invention provides a geopolymer alkali activator based on a red mud raw material and a preparation method of the geopolymer alkali activator, and belongs to the technical field of geopolymer materials. The method comprises the following steps that under the stirring and heating conditions, red mud and plant ash are gradually added into a sodium chloride solution to form a mixed solution, the mass ratio of the red mud to the plant ash is (3-6): 1, and the solid-liquid mass ratio of the red mud to the sodium chloride solution is 1: (3-6); the pH value of the system and the Na2O release amount are continuously detected, when the pH value of the system is larger than or equal to 12.0 and the change amount within 30 min is smaller than 0.1, steel slag micro powder is added, the adding amount is 1-5% of the total mass of the mixed solution, and stirring continues to be conducted for 20-60 min; and when the pH value of the system is stable and no longer increased within 2 hours or the release amount of Na2O is balanced, carrying out solid-liquid separation to obtain filtrate, namely the geopolymer alkali activator. According to the method, the dependence on traditional high-alkalinity chemical substances can be reduced, and a new way is provided for resource utilization of the red mud.
Owner:HUNAN UNIV +1
Coal-based solid waste selection-metallurgy-material resource comprehensive utilization process method and application thereof
The application provides a coal-based solid waste flotation-metallurgy-material resource comprehensive utilization process method and application, and belongs to the technical field of coal-based solid waste comprehensive utilization.The coal-based solid waste is first separated by flotation to obtain residual carbon and tail ash; then the tail ash is dried and alkali melted to become active material; then the active material is leached and filtered to obtain leaching liquid and leaching residue, and Li and Ga in the leaching liquid are adsorbed and enriched; the adsorbed leaching liquid is adjusted in silicon-aluminum ratio, hydrothermally crystallized, filtered and high-temperature calcined to obtain mesoporous molecular sieve; the filtered silicon-containing alkali liquor is carbonized and calcined to obtain white carbon black; the tail ash and the leaching residue are mixed, and through moisture adjustment and curing process, a geopolymer product is obtained.The method in the application does not produce waste residue and waste water in the implementation process, finally obtains four products of Li and Ga enrichment product, geopolymer product, mesoporous molecular sieve and white carbon black, realizes full and comprehensive utilization of the coal-based solid waste, and has good environmental benefits and great significance.
Owner:CHINA UNIV OF MINING & TECH
Cementing material based on large-dosage shield muck as well as preparation method and application of cementing material
The invention relates to the technical field of gelling materials, in particular to a gelling material based on high-doping-amount shield muck and a preparation method and application thereof.The preparation method comprises the following steps that after original shield muck is sequentially subjected to mechanical crushing, forced homogenization and drying to constant weight, gradient heating calcination is conducted, then rapid cooling is conducted immediately, and the high-doping-amount shield muck is obtained; carrying out two-stage ball milling and sieving to obtain active shield muck powder; preparing a solid dry blend; preparing a composite alkali activator solution; and mixing the composite alkali activator solution with the solid dry blend, primarily stirring and infiltrating, adding the residual mixing water, stirring to obtain uniform geopolymer slurry, and compacting and molding to obtain the cementing material. The problems that in the prior art, a high-performance geopolymer cementing material based on shield muck is low in activity, insufficient in strength, small in shield muck mixing amount, single in performance and poor in volume stability are solved.
Owner:UNIV OF SCI & TECH BEIJING
Polyurethane repairing material for underground engineering concrete
The invention discloses a polyurethane repairing material for underground engineering concrete, and relates to the technical field of engineering leakage treatment. A component A is a polyether polyol system containing a silane coupling agent and active inorganic powder, a component B is an emulsion of a modified MDI prepolymer-aliphatic isocyanurate tripolymer and an alkaline activator, the two components are instantaneously converged in a three-cavity grouting gun and a constant-temperature air three-runner according to the mass ratio of 0.8-1.2: 1, gel is formed in the environment of-10 DEG C to 50 DEG C for 90 s, and water is stopped in 10 min. The micro-foaming expansion rate is 2-4 times, geopolymers are synchronously generated, organic-inorganic dual-curing interlocking is achieved, the closed porosity is larger than or equal to 95%, and the compression strength is gt; the permeability coefficient is less than or equal to 10-m / s. Silane chemical bridging enables the bonding strength to be higher than the splitting strength of the base material.
Owner:HUAZHONG UNIV OF SCI & TECH
Geopolymer-based recycled fine aggregate shield synchronous grouting material and preparation method thereof
The invention discloses a geopolymer-based recycled fine aggregate shield synchronous grouting material and a preparation method thereof. The grouting material is composed of a cementing material, an alkali activator, aggregate, a water reducing agent, a retarder and water, and the cementing material is a geopolymer precursor and is composed of fly ash, slag and metakaolin; the aggregate is composed of river sand and recycled fine aggregate. By optimizing the proportion and the preparation process, the material has the characteristics of excellent flowability, controllable setting time, high early strength, good impermeability, good durability and the like, and is suitable for synchronous grouting of shield tunnels in water-rich sand layers, high-water-pressure stratums or corrosion stratums. The invention also provides two optimization methods which are respectively based on a response surface method and a BP neural network combined genetic algorithm to realize multi-objective optimization of slurry performance. According to the material, dependence on traditional cement and gravel resources is remarkably reduced, energy consumption and carbon emission are reduced, high-added-value resource utilization of industrial solid waste and construction waste is achieved, and the material conforms to the development direction of green low-carbon building materials.
Owner:GUANGXI UNIV +2
Geopolymer foam adsorbent material with vein-like multi-stage network pore structure and preparation method thereof
ActiveCN116618014BOther chemical processesSpecific water treatment objectivesMicroorganismPtru catalyst
The application belongs to the technical field of new materials, and relates to a geopolymer foam material with a vein-shaped multistage network pore structure and a preparation method thereof. The application comprises the following steps: pretreating luffa, cow horn fiber and coconut fiber respectively, and loading catalysts; uniformly mixing fly ash floating beads, metakaolin, slag, an anionic surfactant, the cow horn fiber loaded with catalysts and the coconut fiber loaded with catalysts to obtain mixed powder; mixing the mixed powder with an alkali activator to prepare a slurry, adding a chemical foaming agent into the slurry, and then pouring the slurry into the luffa loaded with catalysts, and then sequentially performing foaming and curing treatment; and performing freeze-drying and calcination on the cured material, and the geopolymer foam material is obtained; the geopolymer foam material prepared by the application has a vein-shaped multistage pore structure, can have physical and chemical adsorption properties on heavy metal ions and cationic dyes, and can remove pollutants such as macromolecules, microorganisms, perfluoroalkyl compounds and ammonia nitrogen compounds.
Owner:SHANDONG UNIV
Reinforced geopolymer gun barrel
A gun barrel can include a cylindrical layer defining an internal bore; and a geopolymer layer on the cylindrical layer; and a continuous fiber reinforced composite on the geopolymer layer. Advantageously, the geopolymer layer can include a thermally conductive material dispersed in a geopolymer matrix. Such a multilayered gun barrel can improve the heat transfer characteristics of the gun barrel relative to a gun barrel without such a geopolymer layer. The geopolymer layer additionally can include a density-reducing material dispersed through the geopolymer matrix to further improve heat transfer and / or weight of the gun barrel relative to a gun barrel composed entirely of metal.
Owner:AVIENT CORP
Ordered layered pore geopolymer based on heterogeneous mold strong gradient bidirectional freezing and preparation method of ordered layered pore geopolymer
The invention discloses an ordered layered pore geopolymer based on heterogeneous mold strong gradient bidirectional freezing and a preparation method of the ordered layered pore geopolymer. The preparation method comprises the following steps: preparing a geopolymer slurry; the method comprises the following steps: forming an ordered layered ice crystal template by adopting graded heat conduction and strong gradient bidirectional freezing based on a heterogeneous material mold: injecting geopolymer slurry into the heterogeneous material mold, performing bidirectional freezing on the geopolymer slurry, inducing the orderly arranged layered ice crystal template, and obtaining a frozen blank containing the layered ice crystal template; performing freeze drying treatment; and maintaining to obtain the ordered layered pore geopolymer. A stable and uniform lateral temperature gradient is actively constructed in a heterogeneous mold, so that the ice crystal template with a long-range ordered layered structure is prepared, multi-stage low-temperature in-situ polymerization treatment is introduced into a frozen blank in a preferable scheme, a geopolymer matrix is reinforced in situ on the premise that the template is not damaged, and the preparation method is simple and easy to implement. And high-fidelity curing of the fine template structure is realized.
Owner:SOUTH CHINA UNIV OF TECH
Organic acid excited solid waste-based cementing material
The invention provides an organic acid excited solid waste-based cementing material, and belongs to the technical field of solid waste utilization. The solid waste-based cementing material excited by the organic acid comprises 90-105 parts by mass of a silicon-aluminum solid waste base material, 7-12 parts by mass of sulfate and 15.3-19.8 parts by mass of a composite organic acid exciting agent, wherein the composite organic acid exciting agent comprises main acid and polyacrylic acid, and the mass of the polyacrylic acid is 10%-40% of the mass of the main acid; the main acid is one or a mixture of citric acid and tartaric acid. According to the organic acid excited solid waste-based cementing material, strong base is prevented from being adopted as an exciting agent, and the defects of a strong base excitation system are avoided.
Owner:XIAN YINDING TECH CO LTD +1
Geopolymer slurries and geopolymer compositions including fluid loss control materials, and related methods
A geopolymer precursor includes an alkaline reactive solid material containing aluminum, silicon, and oxygen, and a fluid loss control material having an ionic stability property that has a first value in water and a second value in a 3M solution of NaOH, wherein a ratio of the second value to the first value is in a range of 0.5 to 2.0. The fluid loss control material may be, or may include a crosslinked polymer, which may include a reaction product of one or more of acrylamide, 2-acrylamido-2-methyl propane sulfonic acid, N,N‑dimethylacrylamide, N,N‑diethylacrylamide, vinyl acetate, or another monomer, and a crosslinker including one or more of methylene bisacrylamide, triallyl amine, pentaerythritol allyl ether, triallyl-triazine-trione, or another material. The geopolymer precursor may include an activator, an alkaline solution having pH of at least about 9, or both.
Owner:SCHLUMBERGER TECH CORP +3
Acid-excited metakaolin-ferrotitanium tailing-based lead ion fixing and sealing geopolymer material and preparation method of acid-excited metakaolin-ferrotitanium tailing-based lead ion fixing and sealing geopolymer material
The invention relates to the technical field of acid-activated cementing materials, and particularly discloses an acid-activated metakaolin-ferrotitanium tailing-based lead ion fixing and sealing geopolymer material and a preparation method thereof in order to solve the problems that an existing acid-activated geopolymer material is poor in stability and reduced in mechanical property. The geopolymer material is prepared from the following components in parts by mass: 20 to 35 parts of ferrotitanium tailings, 30 to 45 parts of metakaolin, 5 to 10 parts of nano silicon dioxide, 15 to 25 parts of phosphoric acid composite exciting agent and 0.5 to 2.5 parts of solid sealing auxiliary agent, the phosphoric acid composite exciting agent comprises phosphoric acid and ammonium dihydrogen phosphate, and the sealing auxiliary agent comprises modified attapulgite and sodium polyacrylate. Through compounding of multiple components, multiple synergistic effects of physical encapsulation, ion exchange, chemical bonding and interface adsorption enhancement are realized, the lead ion encapsulation efficiency and mechanical properties are improved, the maintenance energy consumption is reduced, and the problems of insufficient long-term stability, low low-temperature curing efficiency and the like of the existing acid-activated geopolymer material can be effectively solved.
Owner:SICHUAN AGRI UNIV
Preparation method and application of alkali-activated iron tailing geopolymer adsorbent
The invention relates to a preparation method and application of an alkali-activated iron tailing geopolymer adsorbent. According to the method, an iron tailing geopolymer is prepared through an alkali activation method, that is, an aluminosilicate structure in iron tailings is destroyed in an alkali activation mode, so that silica tetrahedron and alumina tetrahedron structures of the iron tailings are reconstructed, and a geopolymer material with adsorption capacity is prepared; on the basis, a foaming agent hydrogen peroxide solution is introduced to adjust the performance, and parameters such as modulus, water cement ratio and curing temperature of the alkali activator are respectively adjusted to prepare an optimal sample. The iron tailing geopolymer adsorbent material which is high in adsorption rate and good in stability is obtained, and the effect of adsorbing residual ciprofloxacin in wastewater is remarkable.
Owner:HEBEI UNIV OF TECH
Wide-proportion ecological nutrient soil based on geopolymer modified iron tailings and preparation method of wide-proportion ecological nutrient soil
The invention discloses wide-proportion ecological nutrient soil based on geopolymer modified iron tailings and a preparation method of the wide-proportion ecological nutrient soil, relates to the technical field of waste resource utilization and ecological restoration, and aims to solve the technical problems of land occupation due to accumulation of the iron tailings, heavy metal pollution, structure hardening and low resource utilization rate. Iron tailings are used as a core raw material and matched with a geopolymer gel system to construct a stable framework and solidify heavy metal, organic nutrient components and a function regulator are compounded to optimize physicochemical properties and nutrient supply, and the ecological nutrient soil is prepared through the processes of raw material pretreatment, synergistic excitation, gradient maintenance and the like. According to the nutrient soil, large-scale flexible absorption (the proportion is 40-80%) of the iron tailings is achieved, meanwhile, the nutrient soil has a pore structure suitable for plant growth, the water and fertilizer retention capacity and the pH value (6.0-7.8) are achieved, the heavy metal leaching amount meets the Soil Environment Quality Agricultural Land Soil Pollution Risk Management and Control Standard, and the method is suitable for large-scale popularization and application. The multi-scene plant growth requirements of farmland improvement, landscaping, mine regreening, side slope ecological protection and the like can be met.
Owner:BEIJING JUJU NEW MATERIALS CO LTD
Systems and methods for producing wellbore fluids
Systems, methods, and apparatus for producing wellbore fluids using drill cuttings, geopolymers, and / or mine tailings, and compositions relating to the same are disclosed. The drill cuttings, geopolymers, and / or mine tailings may be used to create appropriate wellbore fluids to be used in wellbore fluid supply systems, such as spacer fluids, lead barrier fluids, tail barrier fluids. In one embodiment, the wellbore fluids result in one or more substantially impermeable barrier sheaths within the wellbore, which barrier sheaths may be cementitious or non-cementitious.
Owner:EXERO WELL INTEGRITY
An apparatus for converting industrial waste residues into geopolymer
ActiveCN224398205UDrying solid materialsDrying machines with non-progressive movementsSlagGeopolymer
The utility model discloses an equipment for converting industrial waste slag into geopolymer, including drying box, the inner bottom surface of drying box is inclined plane, and a plurality of shovel plates are pasted to the inner bottom surface of drying box, the top surface of vertical board of shovel plate is connected with arc plate, and the top surface of arc plate is fixedly connected with the stirring rod in drying box, and the top surface of the flow guide orifice plate is connected through the connecting rod between the inner top surface of drying box, and the inner concave arc surface of arc plate is arranged and is inclined to set up to the direction of the direction of approaching drying box inlet port, and the inner arc surface of flow guide orifice plate is ladder shape, and the stirring rod on drying box is installed shovel plate and is shovelled up the raw material of drying box inner bottom surface and is transported to flow guide orifice plate through arc plate, and the raw material slowly falls along flow guide orifice plate, and the flow path of raw material is followed, thereby prolonging the time of raw material in drying box and being convenient for the full drying of raw material, and the drying efficiency of raw material is improved.
Owner:INNER MONGOLIA SUYUE TECHNOLOGY CO LTD
Geopolymer recycled concrete production sorting device and working method thereof
The application discloses a sorting device for geopolymer recycled concrete production and a working method thereof. The sorting device comprises a main body, a feeding cavity is formed in the upper end of the inside of the main body, a sorting chamber is formed below the feeding cavity and is communicated with the feeding cavity, a PLC controller is mounted on one side of the front end of the main body, rotating doors are movably mounted on the two sides and the front and back ends of the main body, a rotating shaft is rotatably arranged in the inside of the feeding cavity, spiral conveying blades are welded to the outer wall of the rotating shaft, a threaded transmission rod is rotatably arranged on one side of the upper end of the inside of the sorting chamber, and a moving block is threadedly connected to the outer part of the threaded transmission rod. The sorting device can avoid the influence of metal impurities on subsequent sorting, improve the sorting effect, make the metal impurities enter the inside of a second collecting frame, facilitate a user to collect and take out the metal impurities, and can inhale generated dust to avoid the diffusion of the dust, thus being good in practicability.
Owner:FUJIAN UNIV OF TECH
Magnetic geopolymer as well as preparation method and application thereof
The invention discloses a magnetic geopolymer as well as a preparation method and application thereof, and relates to the technical field of solid waste resource utilization and wastewater treatment. The preparation method comprises the following steps: drying nickel slag, crushing and grinding, adding calcium oxide to adjust alkalinity, and heating and melting to obtain a nickel slag melt; the nickel slag melt is subjected to water quenching, and magnetic slag micro powder is obtained through drying, crushing and screening; and mixing the magnetic slag micro powder with an alkaline activator, injecting the mixture into a mold, performing constant-temperature maintenance, demolding, and crushing to obtain the magnetic geopolymer. The magnetic geopolymer prepared by the invention has high adsorption capacity and rapid adsorption kinetics for multiple heavy metal ions in water, and has excellent magnetic separation performance.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY
A geopolymer zinc-rich anticorrosive coating, and a preparation method and use method thereof
The application provides a geopolymer zinc-rich anticorrosive coating and a preparation method and use method thereof. The geopolymer zinc-rich anticorrosive coating comprises slag, metakaolin, water glass, zinc powder, a filler and an additive. The application solves the problem of poor mechanical properties caused by excessive zinc powder content. The problem of poor protection of the coating caused by excessive zinc powder content can be effectively avoided by high-temperature (450-500 DEG C) baking of the geopolymer zinc-rich anticorrosive coating. The molten zinc powder can completely fill the pores between the coating and the zinc powder and form a dense passivation film. Compared with the traditional zinc-rich coating, the high-temperature baked zinc-rich anticorrosive coating has higher hardness, wear resistance, corrosion resistance and heat resistance.
Owner:GUANGXI UNIV
Preparation method and application of sintering-free phosphorus-absorbing particles
The invention provides a preparation method and application of sintering-free phosphorus-absorbing particles, and the preparation method comprises the following steps: (1) a mixing step: uniformly mixing a mixed material containing phosphate tailings, fly ash, slag powder and quick lime with an alkali activator solution under the stirring action to obtain a mixed slurry; (2) curing: injecting the mixed slurry into a mold, and demolding after vibration degassing and sealed curing to obtain a cured sample; (3) curing: curing the cured sample under the conditions of constant temperature and constant humidity to obtain a geopolymer sample; and (4) granulating: segmenting, crushing and screening the geopolymer sample to obtain the sintering-free phosphorus-absorbing particles. According to the method, a preparation process combining geopolymer synthesis and physical crushing is adopted, high-temperature sintering is not needed in the whole process, and the energy consumption and the production cost are remarkably reduced. Moreover, the method is simple in process, low in cost and low in energy consumption, and has a good application prospect.
Owner:YUNNAN PHOSPHATE CHEM GROUP CORP +1
A rapid-setting anti-freezing geopolymer pavement base material and a preparation method thereof
The application provides a quick-setting anti-freezing geopolymer pavement base material and a preparation method thereof, and belongs to the technical field of geopolymer materials. The application takes red mud and titanium white slag as precursor materials, takes carbide slag as an alkali activator, and simultaneously adds anti-freezing reinforcing materials compounded by white mud, ceramic powder and brick powder. The geopolymer pavement base material is formed by compounding multiple components, fully utilizes multiple high-alkaline and silicon-aluminum-rich solid waste resources, has the comprehensive advantages of low carbon, environmental protection, low cost, short construction period, excellent anti-freezing performance and the like, breaks through the technical bottlenecks of slow low-temperature setting and poor durability of the pavement base material in cold regions, and is suitable for highway, municipal road and border road engineering in high-cold regions. The application has important engineering significance and popularization value for green traffic infrastructure construction in cold regions.
Owner:HUNAN UNIV +1
Geopolymer concrete material based on tailings and preparation method
The invention relates to the technical field of geopolymer concrete preparation, in particular to a geopolymer concrete material based on tailings and a preparation method. The geopolymer concrete material based on tailings is prepared from 40 to 60 parts of modified tailings, 20 to 30 parts of modified slag, 10 to 20 parts of activated metakaolin, 5 to 12 parts of quartz sand and a composite exciting agent solution, wherein the liquid-solid ratio of the composite exciting agent solution is 0.3 to 0.4; the preparation method of the composite exciting agent comprises the following steps that sodium fluosilicate, aluminum ammonium sulfate and sodium sesquicarbonate are dissolved in water according to the mass ratio of 3: 2: 1, a mixed solution is obtained and left to stand for 30 min, the composite exciting agent is obtained, and the mass ratio of water to sodium fluosilicate is (20-40): 1. According to the geopolymer concrete material based on the tailings and the preparation method, the problems that in the prior art, the energy consumption of a tailings treatment process is high, and a traditional high-alkali activator easily causes alkali-aggregate reaction are solved.
Owner:XIAN JIBU YINUO TECH CO LTD
Use of nanosealant in geopolymer systems
Sealants are deployed to a set geopolymer material and are reacted to seal defects. The sealant is brought into contact with the set geopolymer and allowed or caused to react to seal defects of the set geopolymer. Such methods can be used to repair defects of set geopolymers deployed in subterranean wells.
Owner:SCHLUMBERGER TECH CORP +3
Modified geopolymer and modified geopolymer composite and process for producing the same
The invention relates to a modified geopolymer and a modified geopolymer composite comprising an additive. The additive is preferably a radiopaque additive. The modification is carried out using one or more water-soluble compounds, which are preferably selected from phosphorous compounds, nitrogen compounds, copper compounds, silver compounds, zinc compounds, tin compounds, and magnesium compounds. In addition, the invention relates to compositions containing the modified geopolymer or the modified geopolymer composite. These compositions preferably comprise a vinyl aromatic polymer and are in the form of a foam.
Owner:SYNTHOS SA
Joule heat curing multi-element solid waste geopolymer concrete and preparation method thereof
This invention relates to Joule-cured multi-component solid waste polymer concrete and its preparation method. It utilizes Joule heat generated by electricity to cure the polymer, significantly improving curing efficiency and the mechanical properties of the polymer concrete. If the water-cement ratio in the concrete raw materials is not higher than 0.3, nano-carbon fibers need to be added to the raw materials; if the water-cement ratio is higher than 0.3, nano-carbon fibers are not initially added. Carbon fibers, or a mixture of carbon fibers and nano-carbon fibers, are uniformly dispersed in water before being added to a uniformly mixed precursor powder. Finally, steel fibers are added and mixed uniformly to form a slurry with a multi-level conductive network. The raw materials include: precursor powder, alkali activator, steel fibers, carbon fibers, and water. The steel fibers account for 0.5~2.5 vol% of the precursor powder, the carbon fibers for 0.4~1.0 vol%, the nano-carbon fibers for 0~0.10 vol%, and the water for 0.2~0.43 wt% of the precursor powder.
Owner:HEBEI UNIV OF TECH
Roadbed slope protection composition based on solid waste-geopolymer and construction method thereof
The invention relates to the technical field of roadbed slope protection, discloses a roadbed slope protection composition based on solid waste-geopolymer and a construction method of the roadbed slope protection composition, and aims to solve the problems of high carbon emission, low solid waste utilization rate, strong ecological destructiveness and weak disaster resistance of a traditional roadbed slope protection material. According to the invention, fly ash, desulfurized gypsum, mineral powder and pretreated red mud are taken as core raw materials, and are matched with a geopolymer activator and a heavy metal stabilizer to form a cement-free flow state system with a high solid waste mixing ratio; during construction, a casing pipe is not needed, through the drilling-layered pouring technology, the solidification body is naturally attached to soil through the fluidity, a multi-deformation solidification structure without rigid cutting is formed, the anti-scouring and anti-collapse capacity of a roadbed slope can be enhanced through the structure, damage of natural disasters such as flood to a roadbed can be effectively resisted, and the construction period is shortened. Meanwhile, the ecological compatibility of the mechanical property and the plant root system penetration rate is considered.
Owner:BEIJING JUJU NEW MATERIALS CO LTD