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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).
Sulfuric acid erosion resistant self-repairing geopolymer system and self-repairing method thereof
The invention discloses a sulfuric acid erosion resistant self-repairing geopolymer system and a self-repairing method thereof, and relates to the technical field of composite materials and artificial intelligence. At least one self-repairing unit optimized for sulfuric acid erosion embedded within the geopolymer matrix; the in-situ multipoint pH sensing network is integrated in the geopolymer matrix and is used for monitoring spatio-temporal evolution data of a pH field in a sulfuric acid erosion process in real time; the edge calculation module is used for identifying a preliminary erosion indication according to the received spatio-temporal evolution data of the pH field; and the central AI decision module is used for evaluating an erosion state and predicting a development trend by utilizing an AI model optimized aiming at sulfuric acid erosion according to the identified preliminary erosion indication and the pH field spatio-temporal evolution data, and generating an optimal repair strategy to control the self-repair unit to perform self-repair. According to the invention, intelligent, active and refined protection and life management of the geopolymer in the sulfuric acid erosion process can be realized.
Owner:QINGDAO UNIV OF TECH
Geopolymer preparation and optimization method and system based on machine learning
The invention provides a geopolymer preparation and optimization method and system based on machine learning. The method is applied to the technical field of material science and machine learning. The method comprises the following steps: acquiring geopolymer preparation experimental data and preprocessing the data; performing nonlinear regression modeling on the geopolymer performance based on four machine learning regression algorithms, and constructing a geopolymer performance prediction model; calculating and distributing weights according to the mean square error of each machine learning model on the verification set, and performing weighted fusion to obtain a performance prediction result; receiving target performance parameters input by a user and an initial raw material ratio range, performing performance prediction by using the trained geopolymer performance prediction model, and reversely searching an optimal ratio combination meeting target performance constraints through an optimization algorithm; and preparing a geopolymer according to the optimal ratio combination to prepare the coal gangue-slag-fly ash geopolymer grouting material. According to the method, the prediction precision and the model generalization ability are effectively improved, and intelligent recommendation and accurate performance prediction of the raw material ratio are realized.
Owner:GUIZHOU INST OF COAL SCI
Hybrid fiber reinforced ultrahigh-performance geopolymer concrete as well as preparation method and application thereof
The invention relates to hybrid fiber reinforced ultrahigh-performance geopolymer concrete as well as a preparation method and application thereof. Slag, metakaolin and silica fume are used as precursor materials of geopolymer concrete, a sodium hydroxide-water glass solution is adopted to compound an alkali activator, and steel fibers, polyvinyl alcohol fibers and modified glass chopped fibers of different sizes are mixed and doped, so that the brittleness of the geopolymer concrete is remarkably improved, and the service life of the geopolymer concrete is prolonged. The early strength and the high temperature resistance are improved. The hybrid fiber reinforced ultrahigh-performance geopolymer concrete has the characteristics of low carbon emission, ultrahigh strength, high temperature resistance, high durability and the like, and can meet the use of the geopolymer concrete in actual engineering. According to the ultrahigh-performance geopolymer concrete, solid waste resources are utilized at the same time, carbon emission in the concrete production process is reduced, and the ultrahigh-performance geopolymer concrete is environmentally friendly, low in carbon, ultrahigh in strength, easy to prepare and capable of being suitable for complex environmental engineering structures such as tunnels, bridges and high-rise buildings.
Owner:TONGJI UNIV
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
Energy storage battery box based on light high-performance concrete and preparation method of energy storage battery box
The invention discloses an energy storage battery box based on light high-performance concrete and a preparation method of the energy storage battery box, and belongs to the technical field of energy storage equipment. The energy storage battery box provided by the invention comprises a light high-performance concrete base body and a metal net embedded in the light high-performance concrete base body, according to the lightweight high-performance concrete matrix, a multi-component gel system composed of ordinary Portland cement, a shrinkage reducing agent, a solid waste-based geopolymer and steel slag micro powder is adopted, and solid waste-based artificial sand, fibers and a solid waste-based filling material in a specific proportion are compounded, so that a lightweight high-strength intrinsically fireproof concrete material is successfully prepared; meanwhile, a large amount of industrial solid wastes such as the desulfurized gypsum, the red mud, the steel slag tailings and the fly ash are utilized, efficient resource utilization is achieved, the raw material cost and full-life-cycle carbon emission are remarkably reduced, and the production efficiency is high.
Owner:SHANDONG UNIV +1
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
Ecological solidified soil integrating scouring protection and seaweed restoration and preparation method of ecological solidified soil
The invention discloses scouring protection and seaweed restoration integrated ecological solidified soil and a preparation method thereof, and belongs to the technical field of ocean engineering and ecological restoration. The material is prepared from the following components in parts by weight: 800 to 1000 parts of sea mud, 200 to 400 parts of calcined coral sand, 50 to 150 parts of a modified chitosan gelling agent, 100 to 200 parts of a silicate geopolymer, 100 to 250 parts of slow-release nutritional ceramsite, 50 to 120 parts of seaweed seeds, 80 to 160 parts of a seawater activating agent and 20 to 50 parts of a microbial carrier loaded with saline-alkaline tolerant bacteria. The material has the characteristics of underwater dispersion resistance and self-leveling, can resist scouring at the flow speed of 2.5 m / s, and realizes that the 30-day accumulative germination rate of sea grass is greater than or equal to 80%. The method breaks through the bottleneck of function splitting of traditional material engineering protection and ecological restoration, synchronously completes scouring protection and seaweed community reconstruction, and is suitable for ocean engineering scouring protection and seaweed ecological restoration engineering.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
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
Geopolymer cementing material prepared from diabase tailings and preparation method of geopolymer cementing material
The invention discloses a diabase tailing geopolymer cementing material and a preparation method thereof, and belongs to the technical field of building materials. The diabase tailing geopolymer cementing material provided by the invention is prepared from the following components in parts by mass: 80 to 120 parts of diabase tailings, 10 to 20 parts of sodium hydroxide, 80 to 120 parts of water glass, 10 to 20 parts of aluminum hydroxide, 1 to 3 parts of a water reducing agent and 2 to 11 parts of a stabilizing material, the geopolymer cementing material is prepared from the solid waste diabase tailings, harmful solvents, heavy metals and radioactive substances are not added, waste can be turned into wealth, the preparation process is simple, the cost is low, the energy consumption is small, and an effective way is provided for comprehensive utilization of the diabase tailings.
Owner:SOUTHWEAT UNIV OF SCI & TECH +4
Polymer synthetic stones with the ability to store electrical energy, and their manufacturing
PendingUS20250308810A1Hybrid capacitor electrolytesHybrid capacitor electrodesCelluloseCarboxylic acid
This synthetic stone can be used as electrical energy storage which acts like a supercapacitor and invention also discloses a preparation method thereof. According to this invention, geopolymer (11) and cement (12) are being taken as materials for an electrolyte. A supercapacitor of the present invention comprises a geopolymer (11) and cement matrix (1) and a positive and negative steel electrode (2, 3), whereby the steel electrodes (2, 3) are arranged in the matrix (1), and the matrix (1) is prepared from conductive mortar. The conductive mortar (1) comprises fly ash, cement (12), gravel and sand, alkali activator (KOH and SiO2) (13), and some additives (14) of synthetic stone compounds such as poly carboxylate ether, retarder, lignosulfonate, ethylene-vinyl acetate, hydroxypropyl methyl cellulose, pigment and carbon black. This supercapacitor synthetic stone is simple in structure and is based on a particular formulation.
Owner:KAYHAN SWISS GMBH
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 concrete dry blend as well as preparation method and application thereof
The invention discloses a geopolymer concrete dry blend as well as a preparation method and application thereof, and belongs to the technical field of building materials. The geopolymer concrete dry blend comprises the following components in parts by weight: 20-85 parts of mineral powder; 10 to 35 parts of fly ash; 5 to 30 parts of silica fume; and 5-20 parts of a solid alkali activator A. In addition, the invention also provides a preparation method of the geopolymer concrete dry blend, which comprises the following steps: mixing mineral powder, fly ash and silica fume to obtain a powder mixture N1; mixing a solid alkali activator and a water reducing agent to obtain a powder mixture N2; and mixing the powder mixture N1, the powder mixture N2 and quartz sand to obtain the geopolymer concrete dry blend. In addition, the invention also provides an application of the geopolymer concrete dry blend in preparation of concrete members. A concrete member prepared from the geopolymer concrete dry blend provided by the invention is long in initial setting time and high in strength.
Owner:史才军
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
Regenerated glass fiber geopolymer concrete material and preparation method thereof
The invention discloses a regenerated glass fiber geopolymer concrete material and a preparation method thereof. The material comprises regenerated glass fibers with the volume mixing amount of 0.1%-0.5%, and the fibers are obtained by crushing waste fan blades. Core components of the waste fan blade are organic polymer matrixes such as a glass fiber reinforced material (mainly containing SiO) and epoxy resin. According to the invention, the recycled regenerated glass fiber is doped into the geopolymer concrete taking the industrial waste residues (blast furnace slag and fly ash) as the cementing material, so that on one hand, two types of solid wastes, namely the industrial waste residues and the waste fan blades, are synergistically consumed, and on the other hand, the material performance is remarkably optimized. Specifically, the dispersed regenerated glass fibers form a three-dimensional network structure in a matrix to effectively transfer stress and bridge cracks, so that the mechanical property of the geopolymer concrete is enhanced, and the cracking of the material is effectively delayed.
Owner:LANZHOU JIAOTONG UNIV
Preparation method and use method of potassium-based porous geopolymer soil acidity modifier
The invention discloses a preparation method and a use method of a potassium-based porous geopolymer soil acidity improver, and belongs to the technical field of soil improvement. The preparation method comprises the following steps: uniformly stirring and dispersing an exciting agent, powder with exciting activity, solid waste and water to form slurry; adding a foaming agent into the slurry, uniformly mixing, pouring into a mold, and curing in a drying oven; and after the slurry is solidified, taking out, demolding, grinding and screening to obtain the potassium-based porous geopolymer soil acidity modifier. According to the invention, an innovative mode of treating wastes with wastes is realized by using geopolymers, and a synergistic solution is provided for acid soil improvement and solid waste recycling.
Owner:GUANGXI UNIV
Geopolymer composition and production method of geopolymer composition
To provide a geopolymer composition improved in flowability and compression strength, and to provide a simple production method of the same with a low environmental load.SOLUTION: A geopolymer composition contains modified fly ash as undersize obtained by classifying fly ash with a sieve, and an alkali source. A production method of the geopolymer composition includes classifying fly ash with a sieve so as to obtain undersize as modified fly ash, and mixing the modified fly ash thus obtained with an alkali source. The modified fly ash is preferably undersize of a sieve of an opening 120 μm or less.SELECTED DRAWING: None
Owner:TOKUYAMA CORP
Slag geopolymer heavy metal adsorption material and preparation method thereof
The invention relates to the technical field of engineering materials, and discloses a slag geopolymer heavy metal adsorption material and a preparation method thereof. A geopolymer is innovatively modified by introducing a magnetic-sensitive nano material, and the heavy metal adsorption performance of the geopolymer is remarkably improved through an in-situ hydrothermal conversion process. The high-calcium slag geopolymer heavy metal adsorption material disclosed by the invention shows remarkable heavy metal adsorption performance and can realize the purpose of rapid solid-liquid separation of the adsorption material under the action of an external magnetic field, so that an innovative solution is provided for efficient and convenient heavy metal pollution treatment; the problems that a conventional low-calcium geopolymer is low in heavy metal adsorption amount, large in residue amount and difficult to dehydrate are solved, the method has wide application prospects, a new method for treating waste with waste is provided for synergistically solving heavy metal waste liquid treatment and solid waste disposal, and important environment-friendly, social and economic benefits are achieved.
Owner:CHINA UNIV OF MINING & 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
Method for preparing geopolymer cementing material based on alkaline solution modified dolomite
The invention belongs to the technical field of geopolymer materials, and particularly provides a method for preparing a geopolymer cementing material based on alkaline solution modified dolomite. The method specifically comprises the following steps: mixing an alkali-activated solution with dolomite to prepare a modified alkali-activated solution; the dolomite is mixed with a geopolymer precursor, the geopolymer cementing material is obtained, and the dolomite accounts for 5%-10% of the mass of the polymer precursor. According to the invention, precipitation of Ca < 2 + > and Mg < 2 + > or generation of Ca (OH) 2 in dolomite is promoted in an alkaline environment, the reaction activity is improved, the material strength is improved while the coagulation time is shortened, and the problems of delayed coagulation and mechanical property reduction caused by traditional direct addition of dolomite are solved.
Owner:HUAZHONG UNIV OF SCI & TECH
Fly ash-based geopolymer concrete and preparation method thereof
The invention discloses fly ash-based geopolymer concrete and a preparation method thereof, and the fly ash-based geopolymer concrete is prepared from the following raw materials in parts by mass: a solid waste cementing material including 60-70 parts of fly ash and 15-30 parts of slag; 2-8 parts of a solid alkali activator; 3-6 parts of carbide slag; the aggregate is prepared from 100 to 120 parts of river sand and 240 to 260 parts of gravel; and 30-45 parts of water. According to the fly ash-based geopolymer concrete disclosed by the embodiment of the invention, carbon dioxide generated in the process of preparing a cementing material can be reduced or avoided, the production cost and the environmental load of the concrete are reduced, the potential activity of the coal-based solid waste can be fully exerted, and meanwhile, the efficient utilization of the fly ash is realized; by introducing the carbide slag and the solid alkali activator, the activity of the fly ash and the slag can be activated, an alkaline environment can be provided, active SiO2 and Al2O3 in the fly ash are subjected to a hydration reaction, hydration products such as C-S-H gel are continuously generated, and the long-term performance of the concrete is more stable.
Owner:GUODIAN SCI & TECH RES INST