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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).
Electromagnetic wave attenuation performance optimization control method and system for iron tailing-based geopolymer
ActiveCN120430093AData processing applicationsCement productionSilicon oxideParticle-size distribution
The invention provides an iron tailing-based geopolymer electromagnetic wave attenuation performance optimization control method and system, and relates to the technical field of electromagnetic wave attenuation, and the method comprises the steps: 1, setting a synthesis condition parameter set of an iron tailing-based geopolymer in a simulation environment, comprising virtual matching of raw materials, particle size distribution, concentration gradient of an alkali activator and curing temperature-time coupling parameters, and a forming process is deduced through an amorphous phase topological configuration and a pore network evolution rule of aluminosilicate gel in a geopolymer microstructure; and step 2, constructing an interface reaction kinetics process based on the synthesis condition parameter set, and generating an enhanced interface digital mapping system with periodically arranged aluminum oxide and silicon oxide regular tetrahedrons through virtual iteration of mineral admixture ratio and forming process parameter boundary conditions. According to the method, a strengthened interface is constructed through simulation synthesis, a loss layer database is established, and microstructure regulation and control and multi-band electromagnetic wave efficient attenuation are achieved.
Owner:FUJIAN CHUANZHENG COMM COLLEGE
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
Preparation method of geopolymer composite material based on modified fibers
The invention relates to a preparation method of a geopolymer composite material based on modified fiber, which comprises the following steps: S1, fiber pretreatment: the fiber is one of basalt fiber and polyformaldehyde fiber; s2, performing surface roughening treatment on the fibers through a polyvinyl alcohol modified impregnating compound to obtain roughened fibers; s3, the roughened fibers are subjected to surface functional modification treatment through a functional modified impregnating compound, and functional modified fibers are prepared; s4, uniformly mixing the powder and an expanding agent according to a mass ratio, and adding an alkali activator solution and the functional modified fibers to prepare a geopolymer gel material; s5, the geopolymer gel material is subjected to stirring, mold filling, steam curing forming, demolding and continuous curing, and the geopolymer composite material based on the modified fiber is obtained.According to the preparation method, the geopolymer composite material with high strength and excellent crack resistance and toughness is obtained through alkali excitation, and the problems that geopolymers are low in toughness and large in brittleness are effectively solved.
Owner:JILIN UNIVERSITY
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
Bulk solid waste-based road cementing material and preparation method thereof
The invention discloses a road cementing material based on bulk solid wastes and a preparation method thereof, and belongs to the field of geopolymer cementing materials. The material is prepared from 35-38 parts of fly ash, 15-18 parts of acid-washed red mud, 22-25 parts of carbide slag, 20-23 parts of phosphogypsum, 5-8 parts of rice hull ash, 6-9 parts of a water reducing agent and water, and the water-binder ratio is (0.4-0.5): 1. Wherein the pickling red mud is treated by 5-6% dilute sulphuric acid (pH is 8-9, and heavy metal is reduced by 30%), and the rice hull ash (SiO2 is greater than or equal to 85%) and the nano silicon dioxide (10-30nm) synergistically optimize the microstructure. The 28-day compressive strength of the material is larger than or equal to 35 MPa, the load cycle strength loss rate is smaller than or equal to 5%, the CO2 emission amount is 62 kg / t, the heavy metal leaching concentration is lower than the national standard by 50%, and the cost is only 31.6% of that of traditional cement. According to the invention, efficient synergistic utilization of four solid wastes of fly ash, red mud, carbide slag and ardealite is realized, and the concrete has the characteristics of high strength, low pollution, salt corrosion resistance and the like, is suitable for heavy-duty road base and severe cold area engineering, and has remarkable environmental protection and economic values.
Owner:INNER MONGOLIA UNIVERSITY +1
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
Geopolymer-based rare earth tailing curing material and preparation method thereof
The invention relates to the technical field of industrial solid waste resource utilization, and particularly discloses a geopolymer-based rare earth tailing curing material and a preparation method thereof, the geopolymer-based rare earth tailing curing material comprises 8%-15% of mineral powder, 20%-25% of fly ash, 20%-35% of rare earth tailings, 0.5%-3% of fiber, 0.5%-1% of nano oxide, 15%-20% of an alkaline activator and 15%-36% of water. The geopolymer-based rare earth tailing curing material provided by the invention has the advantages of excellent mechanical properties, good fluidity, appropriate curing time, environmental friendliness and the like, and is suitable for ecological restoration of mines, treatment of tailings ponds and preparation of road base materials; according to the invention, industrial wastes (such as fly ash, slag and rare earth tailings) are used, so that resource recycling is realized; the carbon emission is low in the production and use process of the material, and the sustainable development requirement is met.
Owner:华能庆阳煤电有限责任公司 +2
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
Solid waste-based conductive recycled aggregate high-ductility concrete and preparation method thereof
The invention relates to the technical field of geopolymer building materials, in particular to solid-waste-based conductive recycled aggregate high-ductility concrete and a preparation method thereof, and belongs to special low-carbon materials. Recycled fine aggregate is adopted, hybrid fibers are added, and the high-ductility concrete with excellent conductivity is prepared; a large amount of industrial waste is adopted in the preparation process, waste utilization and environmental protection are achieved, and good conductivity and toughness are achieved.
Owner:BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
Method, device and equipment for optimizing mix proportion of dredged sediment geopolymer and medium
PendingCN120409280ADesign optimisation/simulationMulti-objective optimisationGeopolymerGenetics algorithms
The invention discloses a dredged sediment geopolymer mix proportion optimization method, device and equipment and a medium. The method comprises the following steps: acquiring dredging sediment geopolymer mix proportion key parameters and corresponding compressive strength data, and constructing a to-be-processed sample set; constructing and training a compressive strength prediction model based on the to-be-processed sample set, and determining a nonlinear mapping relation function of the dredged sediment geopolymer mix proportion key parameters and compressive strength data; constructing a target fitness function according to the nonlinear mapping relation function, the dredged sediment geopolymer production material cost and the production carbon emission; constructing constraint conditions according to the matching ratio key parameter range of the dredged sediment geopolymer, the use amount range of production materials and the volume of the dredged sediment geopolymer per cubic meter; and based on the target fitness function and the constraint condition, carrying out dredging sediment geopolymer mix proportion key parameter multi-target optimization through a genetic algorithm, and determining a dredging sediment geopolymer target mix proportion. And multi-objective optimization of the mixture ratio of the dredged sediment geopolymer is realized.
Owner:NAT ENG RES CENT OF DREDGING TECH & EQUIP
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)
Composite system geopolymer grouting material and preparation method thereof
The invention discloses a composite system geopolymer grouting material and a preparation method thereof. The composite system geopolymer grouting material comprises the following raw materials in percentage by mass: 50-70% of coal gangue, 10-30% of fly ash and 10-30% of cement. Functional additives: 5%-20% of desulfurized gypsum and 5%-15% of bentonite; the composite exciting agent is formed by compounding carbide slag and sodium silicate according to the mass ratio of 1: 1-1: 2. The geopolymer is excellent in mechanical property, meets engineering requirements, is remarkable in environmental protection benefit, conforms to double-carbon target low-carbon process innovation: a calcination-free process: traditional high-temperature calcination is abandoned (the temperature needs to be 550-900 DEG C), carbon emission is reduced by more than 30% (compared with a contrast, the carbon emission of a traditional process is increased by 35%), and the geopolymer conforms to the green positioning of low energy consumption and low three wastes of geopolymers. The cost advantage is prominent, the economic value is remarkable, the raw material cost is reduced, specifically, the coal gangue (low-cost solid waste) is used for replacing 30%-50% of cement, and the comprehensive raw material cost is reduced by 40% (compared with a traditional cement-based grouting material).
Owner:JIANGSU INST OF GEOLOGY & MINERAL RESOURCES DESIGN
Preparation process of high-toughness anti-cracking alkali-activated geopolymer cementing material
The invention discloses a preparation process of a high-toughness anti-cracking alkali-activated geopolymer cementing material, which comprises the following steps: (1) mixing steel slag powder and a phosphoric acid solution, heating, preserving heat, reacting, drying to remove moisture, and grinding to obtain pretreated steel slag powder; and (2) uniformly mixing brucite powder, potassium silicate and water to form slurry, then adding basalt fibers into the heated slurry, standing, separating out the fibers after standing, uniformly mixing the fibers with the pretreated steel slag powder, and drying to obtain pretreated fibers. And (3) placing the pretreated fiber in a closed container containing carbon dioxide and water vapor, and carrying out heat preservation and maintenance to obtain the modified fiber. And (4) weighing the following raw materials according to the following proportion: aluminum-silicon solid waste micro powder, coarse aggregate, fine aggregate, the modified fiber, an alkali activator and a water reducing agent. The preparation method comprises the following steps: uniformly mixing the raw materials, adding water and uniformly stirring. The fiber subjected to surface treatment effectively improves the crack resistance of the geopolymer cementing material.
Owner:SICHUAN ZHANTAIJIN TECHNOLOGY CO LTD +1
High-performance self-compacting high-crack-resistance fiber-reinforced cement-based composite material and preparation method thereof
The invention relates to the field of cement-based composite materials, and particularly discloses a high-performance self-compacting high-crack-resistance fiber-reinforced cement-based composite material and a preparation method thereof.The cement-based composite material is prepared from cement, fly ash microspheres, silica fume, a modified geopolymer, sand, fine stone, polypropylene fibers, an expanding agent, an additive and water; wherein the additive at least comprises welan gum; the preparation method comprises the following steps: mixing and stirring the cement, the fly ash beads, the silica fume, the sand, the fine stone and the modified geopolymer, and adding the expanding agent to prepare a primary mixture; and mixing the admixture with water, adding the primary mixture, then adding the polypropylene fiber, stirring and mixing, then adding the rest admixture, and stirring to obtain the product. The cement-based composite material has the characteristics that the prepared cement-based composite material has better fluidity and better segregation resistance and crack resistance, and the cement-based composite material can be applied to the fields of non-dismantling bottom die floor support plate bottom plates, foundation support grouting reinforcement, section increasing method reinforcement, quick pavement repair and the like.
Owner:HOMOGEN NEW QUALITY (XIAN) NEW MATERIALS CO LTD
Lightweight thermal insulation concrete and preparation method thereof
The invention discloses lightweight thermal insulation concrete and a preparation method thereof, and belongs to the technical field of lightweight concrete. The lightweight thermal insulation concrete is prepared from the following raw materials in parts by weight: 20 to 25 parts of fly ash geopolymer slurry, 60 to 70 parts of cement, 20 to 24 parts of glass beads, 100 to 110 parts of modified ceramsite, 15 to 17 parts of polypropylene fiber, 5 to 7 parts of potassium silicate, 16 to 20 parts of pure acrylic emulsion, 1.5 to 2 parts of gamma-aminopropyltriethoxysilane, 0.8 to 1.0 part of polycarboxylic acid water reducer and 0.3 to 0.5 part of cellulose ether. 3-5 parts of a foaming agent, 1-2 parts of a synergist and 50-60 parts of water. The lightweight concrete prepared by adding the modified ceramsite, the synergist dipropylene glycol monomethyl ether, the compound foaming agent and other specific material components is good in thermal insulation effect and excellent in crack resistance and frost resistance, and the comprehensive performance is synchronously improved.
Owner:TIANYUAN CONSTR GROUP +1
Rigid-flexible combined pile for thick collapsible loess stratum and construction method of rigid-flexible combined pile
The invention belongs to the technical field of civil engineering, and discloses a rigid-flexible combined pile for a thick collapsible loess stratum, which comprises a flexible short pile, a semi-rigid medium-long pile, a rigid long pile, an alkali-activated geopolymer solidified loess cushion layer and a fiber grid, the semi-rigid medium-long piles are used for reinforcing a medium-thickness loess foundation, and the rigid long piles are used for reinforcing a deep-thickness loess foundation; the flexible short piles and the semi-rigid medium-long piles are arranged in a rectangular array mode, each semi-rigid medium-long pile is located at the centroid of the four adjacent flexible short piles, the rigid long piles are arranged in a plum blossom-shaped array mode, each rigid long pile is located at the centroid of the four adjacent semi-rigid medium-long piles, and the alkali-activated geopolymer solidified loess cushion layer and the fiber grating are arranged on the pile top. Compared with a traditional method, the rigid-flexible combined pile and the construction method thereof have the advantages that cost is saved, and the problem of reinforcement of deep and thick collapsible loess composite foundations under the condition of small loads of high-speed railways, highways, buildings, municipal roads and the like is solved.
Owner:CHINA RAILWAY 21TH BUREAU GROUP +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
Carbon-Sequestering Concrete Composition with Enhanced CO2 Absorbtion and Method of Manufacturing Thereof
A carbon-sequestering concrete composition and method of production are disclosed. The composition comprises geopolymer binder components, aggregates, and alginate beads formed from brown algae powder through ionic gelation. The alginate beads significantly increase CO2 absorption surface area compared to algae powder, creating a matrix across the concrete surface that enhances long-term sequestration and improves durability. The beads interact synergistically with other concrete components, including geopolymers, fly ash, and ground granulated blast furnace slag, to enhance pozzolanic reactions and create additional sites for carbon dioxide capture. The alginate beads also facilitate the dissolution of minerals like olivine, further enhancing carbon capture. The composition demonstrates superior carbon sequestration capabilities, enabling sustained CO2 absorption throughout its service life. The method includes forming alginate beads, incorporating them into the concrete mixture, and allowing for initial hardening and drying processes that promote carbon dioxide absorption directly from the air.
Owner:LAFAVE MICHAEL
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
Multi-component composite modified geopolymer material and preparation method thereof
The invention relates to a multi-component composite modified geopolymer material and a preparation method thereof, and aims to solve the problems of high brittleness, easiness in cracking and poor durability of a traditional geopolymer. According to the material, industrial solid wastes (carbonized steel slag, volcanic ash and the like) are used as main matrixes, a macroscopic anti-cracking framework is constructed through red copper fibers, micropores are nanofilled with CVD silicon oxide substrate graphene, and polyamide resin flexibly buffers stress, so that a cross-scale reinforcing system is formed. The preparation method adopts a solid phase premixing-liquid phase excitation-gradient compounding process, and functional components are doped in sections, so that the dispersity and constructability are guaranteed. The technical effects are obvious: the breaking strength is reached, the splitting tensile strength is obviously improved, the mass loss rate is obviously reduced after freezing and thawing for 100 times, and the shrinkage crack self-limit is within 50 [mu] m. The carbon emission of the material is greatly reduced, the high-durability standard is met, and the material is suitable for severe environmental engineering.
Owner:NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
Method for enhancing and modifying geopolymer curing performance of high-bentonite-content slurry
The invention relates to the technical field of waste slurry treatment, in particular to a geopolymer curing performance enhancing and modifying method for high-bentonite-content slurry. Comprising a method for adding a curing and enhancing modification auxiliary agent, and the method for adding the curing and enhancing modification auxiliary agent comprises the following steps: doping the curing and enhancing modification auxiliary agent into high-bentonite-content slurry, uniformly stirring, and standing for curing; wherein the curing enhanced modification additive comprises the following raw material components in percentage by mass: 70-80% of calcium chloride, 10-20% of sodium chloride, 10-15% of nano silicon dioxide, 5-10% of a dispersing agent and 0.5-3% of an EDTA (Ethylene Diamine Tetraacetic Acid)-polymer derivative. The additive is added, so that the negative influence of bentonite in the waste slurry on the reaction of the geopolymer is effectively eliminated, the reaction conditions of the geopolymer in a complex slurry environment are optimized, and the utilization rate and the success rate of the slurry are improved.
Owner:SHENZHEN UNIV +1
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
Geopolymer concrete and preparation method thereof
InactiveCN120441250AConjugated synthetic polymer artificial filamentsArtifical filament manufactureAggregate (composite)Polyvinyl alcohol
The invention relates to the technical field of concrete, and particularly discloses geopolymer concrete and a preparation method thereof. The geopolymer concrete is prepared from the following raw materials in parts by weight: 60 to 80 parts of mineral powder, 30 to 40 parts of fly ash, 20 to 25 parts of silica fume, 45 to 55 parts of alkali activator, 150 to 180 parts of aggregate, 1.95 to 2.25 parts of toughening fiber and 40 to 50 parts of water, the toughening fiber is composite toughening agent modified polyvinyl alcohol / polyacrylonitrile composite fiber, and the length of the toughening fiber is 6 to 10 mm; in addition, the preparation method disclosed by the invention has the advantage of improving the brittleness of the geopolymer concrete.
Owner:SHANDONG GAOSU LOAD & BRIDGE MAINTENANCE CO LTD
In-situ shell-glue type geopolymer porous concrete and preparation method thereof
The invention discloses in-situ shell-glue type geopolymer porous concrete and a preparation method thereof.The preparation method comprises the following steps that S1, fly ash, quartz sand, cement, lime, gypsum, borax, a water reducing agent and a foam stabilizer are mixed, and a first mixture is obtained; mixing sodium hydroxide with part of the mixing water to obtain alkali liquor, and adding floating beads into the alkali liquor to obtain a second mixture; mixing the aluminum powder, the nano aluminum hydroxide and the rest of the mixing water to obtain a third mixture; s2, mixing the first mixture and the second mixture, then adding a third mixture, and uniformly stirring to obtain slurry; s3, the slurry is injected into a mold and then coated with a film, then pre-curing treatment is carried out, demolding is carried out after pre-curing is finished, and a pre-product is obtained through cutting; and S4, performing autoclaved curing on the pre-product to obtain the in-situ shell-glue type geopolymer porous concrete. The in-situ shell-glue type geopolymer porous concrete with low heat-conducting property and high compressive property can be obtained.
Owner:SOUTHWEAT UNIV OF SCI & TECH
Multi-source solid waste-based low-carbon geopolymer cementing material as well as preparation method and application thereof
The invention relates to a multi-source solid waste-based low-carbon geopolymer cementing material as well as a preparation method and application thereof, and belongs to the technical field of geopolymer materials. The multi-source solid waste-based low-carbon geopolymer cementing material is prepared from the following components in parts by weight: 80 to 95 parts of curing base material, 5 to 20 parts of excitation component, 2 to 5 parts of regulation component and 0.5 to 2 parts of nano reinforcing agent. The invention also provides a preparation method and application of the multi-source solid waste-based low-carbon geopolymer cementing material. The multi-source solid waste-based low-carbon geopolymer cementing material prepared by the invention has the advantages of high-value utilization of solid waste resources, excellent mechanical and durability, low-carbon and efficient process and wide application scene, and provides an innovative solution for green building materials and circular economy.
Owner:菏泽城建工程发展集团有限公司
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
Geopolymer composition and geopolymer cured body
To provide a geopolymer composition capable of improving strength of a cured product.SOLUTION: A geopolymer composition contains an active filler (A), an alkali activator (B), and an aggregate (C). The aggregate (C) contains a first reactive aggregate (C1) having a SiO2 content of 40 mass% or more and a CaO content of 25 mass% or more. The aggregate (C) contains a second reactive aggregate (C2) having a Si ion elution amount of 15 ppm or more and a Ca ion elution amount of 5 ppm or more.SELECTED DRAWING: Figure 1
Owner:KMEW CO LTD