229 results about "Pozzolan" patented technology

The purpose of this invention is to provide a method for preparing cemented backfill materials based on response surface methodology using composite activating coal gasification slag. This method belongs to the field of mining engineering technology. Based on sorting and removing impurities from the coal gasification slag and drying it, the invention obtains ultrafine powder of the coal gasification slag for preparing the backfill material through ball milling. Then, coal gangue is crushed and screened using a crusher to obtain coarse, medium, and fine aggregates for the backfill material. Finally, cement, ultrafine coal gasification slag powder, coal gangue aggregate, activator, and water are mixed evenly to prepare the cemented backfill material. This invention not only solves the problem of low activity of coal gasification slag volcanic ash but also effectively controls the shortage of cemented backfill materials and high backfilling costs during cemented backfill mining, ensuring sustainable development. Furthermore, it effectively utilizes the widely accumulated coal gasification slag, reducing pollution and large-scale land occupation of the surrounding environment.

The invention belongs to the technical field of mine goaf filling materials, and particularly discloses flow-state solidified loess for coal mine filling and a preparation method and application of the flow-state solidified loess. According to the method, rich loess resources in the loess plateau area are used for preparing the flow-state solidified loess for coal mine filling, the coal mine recovery rate can be increased, the filling material cost is reduced, the problem that stones in the loess plateau area are insufficient is solved, the toughness and dry shrinkage resistance of the solidified flow-state solidified loess can be improved, and the problem that the loess is soft and swelled when meeting water is effectively solved. The curing agent for the fluid-state cured loess is developed according to the characteristics of loess of loess plateau and the characteristics of early strength, fluidity, pumpability, crack resistance and the like required by filling of the fluid-state cured loess, the alkali excitation mechanism, the pozzolanic effect, the secondary hydration reaction and other mechanisms are utilized, and proper functional components such as early strength, water retention and crack resistance are compounded, so that the curing agent for the fluid-state cured loess is prepared. The curing agent can effectively solve the common problems of air shrinkage, easy cracking, low strength and the like when a commercially available curing agent is used for preparing flow-state cured loess.

Pumpable slurry compositions including at least one aluminosilicate additive and optional pozzolanic cement additives and methods including the pumpable slurry compositions improve development of compressive strengths in the pumpable cement slurry compositions. The methods utilize one or more pumpable cement slurry compositions including at least one cement component, water, at least one first aluminosilicate additive, at least one optional second aluminosilicate additive, and one or more optional pozzolanic additives, where the at least one first aluminosilicate additive has an amorphous phase of greater than about 50% and a weight ratio of silica oxide to aluminum oxide of about 1.0 to about 2.5, and the at least one optional second aluminosilicate additive has a weight ratio of silica oxide to aluminum oxide of about 1.7 to about 3.3.

The invention relates to the technical field of grouting materials, in particular to a dynamic water environment anti-dispersion micro-expansion grouting material and a preparation method thereof. A component A of the grouting material mainly comprises the following raw materials in parts by weight: 120-160 parts of a gel material with volcanic ash characteristics, 3-5 parts of a retarder, 10-15 parts of magnesium oxide, 0.5-2 parts of citric acid, 5-8 parts of aluminum sulfate, 1-2 parts of sodium fluoride, 0.5-1 part of gelatin and 70-100 parts of water; the component B mainly comprises the following raw materials in parts by weight: 4-8 parts of polyacrylamide, 5-10 parts of polyacrylic acid derivative salt, 1-2 parts of alcohol polysaccharide, 40-100 parts of water glass and 30-50 parts of water; magnesium oxide, aluminum sulfate, gelatin and sodium fluoride in the component A are prepared into core-shell anti-dispersion particles in advance; the problems that a traditional cement grouting material is poor in anti-scouring capacity and anti-dispersing capacity, low in retention rate, poor in stone durability and the like can be solved.

The invention discloses a high-impermeability concrete material and a preparation method thereof, and belongs to the technical field of concrete materials, and the high-impermeability concrete material specifically comprises the following components in parts by weight: 80-100 parts of stones, 40-60 parts of quartz sand, 25-35 parts of cement, 8-12 parts of an impermeability reinforcing material, 3-5 parts of sodium carboxymethyl cellulose, 1.5-1.8 parts of an additive and 25-30 parts of water. The Portland pozzolana cement concrete is reinforced through mutual cooperation of sodium carboxymethyl cellulose and an anti-permeability reinforcing material, so that the compressive strength and the water permeability resistance of the cement concrete are effectively improved, the corrosion resistance of chloride ions and sulfate is improved, and the service life of the cement concrete in a high-ion environment is prolonged.

Hydraulic binder composition comprising: a mixture of (i) between 20 and 95 dry wt % of at least one steel making slag, (ii) between 4 and 79 dry wt % of at least a slag different from (i) and / or at least one pozzolanic material and / or at least one inert filler, and (iii) between 1 and 25 dry wt % of at least one co-binder; between 0.01 and 10 dry wt %, relative to the mixture total dry weight, of at least one steel making slag accelerator, between 0.1 and 5 dry wt %, relative to the mixture total dry weight, of at least one alkali activator for reacting (i), (ii), and / or (iii) with water, the alkali activator different from the slag accelerator and chosen among alkali mineral salts and mixtures thereof; and between 0.1 and 2 dry wt %, relative to the mixture total dry weight, of at least one fluidification agent.

The invention belongs to the technical field of negative carbon building materials, and particularly relates to a multi-element solid waste negative carbon cement-based material and a preparation method thereof. The material is prepared from the following components in parts by weight: 10 to 320 parts of carbonized carbide slag, 0 to 240 parts of uncarbonized carbide slag, 25 to 640 parts of calcined coal gangue, 25 to 800 parts of Portland cement, 6 to 320 parts of silica fume and other pozzolanic mineral admixtures and 30 to 800 parts of mixing water. The preparation method comprises the following steps: carbonizing the carbide slag until the content of calcium carbonate is more than or equal to 90%, and calcining and activating the coal gangue at 700-800 DEG C; all the powder raw materials are subjected to dry mixing, water is added for segmented stirring, and standard curing is performed after pouring forming. The carbonized carbide slag is used for replacing limestone to achieve carbon sequestration, the calcined coal gangue is used for replacing calcined clay, natural resources are prevented from being exploited, the cement clinker replacement rate of 70% is achieved through the synergistic effect of multi-element solid waste in a low clinker system, the material has excellent mechanical and durability, and carbon emission and resource consumption are remarkably reduced.

The invention discloses a fly ash-based admixture and a preparation method thereof, and belongs to the technical field of building materials. The fly ash is used as a main body and cooperates with the slag, the steel slag and the volcanic rock powder, so that the utilization rate of industrial solid wastes is remarkably increased, the cement consumption is reduced, the hydration heat of the concrete is reduced, temperature cracks of mass concrete can be effectively inhibited, and meanwhile, the introduction of the volcanic rock powder further supplements active silicon-aluminum components, enhances the volcanic ash effect and improves the later strength; by introducing gypsum, the setting time can be adjusted, a sulfate excitation environment is provided, an early hydration reaction of a fly ash system is promoted, the problem that a traditional admixture is low in early strength is solved, concrete pores are filled through the micro-aggregate effect of the fly ash-based admixture, the structure is denser, and anti-permeability and mechanical properties are improved.

A method of preparation of a foamed concrete, comprising the steps of; providing a cementitious slurry, comprising in wt% relative to the wt of the slurry, 60-70% of a cementitious material, 0.5-5% in

Disclosed herein is a bio-concrete composition comprising a bio-cement; where the bio-cement comprises a bio-mineralized algae, a silica source, pozzolan, biochar and / or bioash; and an aggregate; where the aggregate comprises a secondary binder, sand and / or rock. Disclosed herein too is a method of manufacturing a transportable dry composition comprising blending together a microorganism package; a nutrient; and a first liquid media; activating the microorganism package; subjecting the microorganism package to desiccation to form a bio-mineralized algae; mixing the bio-mineralized algae with a silica source, pozzolan, biochar and / or bioash to form a bio-cement; and mixing the bio-cement with an aggregate to form a bio-concrete.

In general, in one aspect, embodiments relate to a method of producing a sustainable pipeline of pozzolanic materials that includes gathering unstructured and / or structured data publicly available on a network, identifying analytical data of a pozzolanic material using one or more machine learning models, where the analytical data is present within at least the structured data, extracting the analytical data from the structured data, predicting, using one or more predictive models, one or more performance characteristics of the pozzolanic material based at least in part on the analytical data, to form one or more predicted performance characteristics, comparing the predicted one or more performance characteristics to one or more minimum acceptable performance characteristics, storing the extracted analytical data and the one or more predicted performance characteristics in a database if the one or more performance characteristics meets or exceeds the minimum acceptable performance characteristic, and preparing a cement composition that includes the pozzolanic material if the predicted one or more performance characteristics meets or exceeds the one or more minimum acceptable performance characteristics.

The invention relates to the technical field of building engineering materials, in particular to an inorganic grouting material with adjustable curing time and a use method thereof. The inorganic grouting material provided by the invention comprises a main material and an adjusting material, the main material comprises the following components in parts by mass: 50-70 parts of sulphoaluminate cement clinker, 10-20 parts of quartz powder, 10-20 parts of gypsum, 3-5 parts of nano volcanic ash, 0.5-1 part of a water reducing agent and 0.1-1.5 parts of a retarder; the adjusting material comprises a composite coagulant and hydroxypropyl methyl cellulose. Through innovation of a material formula and innovation of a construction process, the problem that the grouting effect is poor due to the fact that a traditional grouting material cannot change the solidification time according to variable underground grouting scenes and requirements is solved; accurate grouting can be achieved under the conditions of different grouting depths, different crushing degrees, different diffusion radiuses, different mixing water temperatures, different coal and rock mass temperatures, different water inflow and the like.

Disclosed herein is a biomineral supplemental blend for the replacement of hydraulic cement to create sustainable controlled low strength material (CLSM) with composition comprising a biomineralized algae, a silica source, pozzolan, biochar and / or bio-fly ash; and an aggregate; where the aggregate comprises a secondary binder, sand and / or rock, hydraulic cement, and filler material(s). Also disclosed herein is a method of manufacturing a transportable dry biomineral supplemental blend CLSM dry paste composition comprising blending together a microorganism package, a biomineralized algae, biochar and / or bio-fly ash, and pozzolan; mixing the biomineral supplemental blend, with hydraulic cement, cementitious materials, and liquid media to form a sustainable CLSM paste; and mixing the sustainable CLSM paste with an aggregate to form a sustainable CLSM mix design.

A coastal karst cement-based expanding grouting material and a preparation method therefor. The material comprises components A and B; the component A comprises a cementing material with volcanic ash characteristics, water and an expanding agent of 0.01-6.0%; and the component B comprises the following in weight percentages: 0.2-1.3% of a water-soluble vegetable gum, 0.5-2.0% of polyacrylamide, 0.01-2.0% of a polyacrylic acid derivative salt, 0.02-1.5% of a complexing agent, 0.05-1.5% of polyhydroxy polysaccharides, 2-70% of water glass and 42.3-90.3% of water. The coastal karst cement-based expanding grouting material has good stability in flowing water, and can fill and reinforce unfavorable geological structures in coastal karst areas, specifically filling fissures and karst caves, plugging water passing channels and the like. Besides, the expansion of the cement-based expanding material is adjustable and can be adjusted and controlled according to the actual filling working condition of the karst caves.

The present disclosure relates to shaped cementitious compositions that comprise a substrate for aquatic flora and / or fauna attachment; methods for providing a substrate for aquatic flora and / or fauna attachment comprising depositing a shaped cementitious composition into a body of water; and methods for making a shaped cementitious composition. The shaped cementitious composition is formed from a pourable cementitious mixture comprising: (a) a pozzolan comprising a natural pozzolan and / or a manmade pozzolan; (b) MgO and / or Mg(OH)2; (c) an aqueous solution comprising one or more accelerants; and (d) at least one aggregate. In some cases, the MgO and / or Mg(OH)2 of (b) is included in the aqueous solution of (c). And, in various cases, the manmade pozzolan comprises a slag.

The invention relates to the field of building materials, and particularly discloses green low-carbon concrete and a preparation method thereof, and the green low-carbon concrete comprises the following raw materials: cement, modified recycled aggregate, a composite admixture, a water reducing agent, a strength-promoting shrinkage-reducing agent, reinforced fibers and water; wherein the composite admixture is a mixture of fly ash and steel slag powder and / or volcanic ash; the modified recycled aggregate is prepared by sequentially crushing, cleaning, modifying and grading building waste; the preparation method comprises the following steps: dry-mixing the cement and the composite admixture, and then mixing with the modified recycled aggregate and the reinforced fiber to prepare a dry mixture; mixing the strength-promoting shrinkage-reducing agent, the water reducing agent and water to obtain a mixture, mixing the mixture with the dry mixture, and stirring to obtain the green low-carbon concrete. The method has the characteristics that the cement consumption is reduced, the industrial solid waste utilization rate is increased, and meanwhile, the concrete strength and the impermeability are improved.

The invention discloses a low-carbon composite cementitious material, a mortar preparation method and application, and the low-carbon composite cementitious material comprises the following raw materials by weight: 50%-85% of cement, 15%-50% of Yellow River mud sand micro powder, 0%-0.75% of a sodium hydroxide activator, and 0%-7.5% of a calcium hydroxide activator. The method has the beneficial effects that the specific surface area of the Yellow River mud sand is influenced through mechanical grinding, more nucleation sites are generated on the surface of the Yellow River mud sand, the subsequent hydration reaction of the Yellow River mud sand and cement is promoted, and the Yellow River mud sand is easy to form micro-group aggregation through grinding, so that internal pores are filled, the porosity is reduced, and the strength is improved; and through the composite excitation effect of the two alkali activators, the generation of C-S-H and C-A-S-H gels is promoted, the pore size distribution is refined, the microstructure is improved, and the potential volcanic ash or activity of sediments is excited to the maximum extent.

Disclosed herein is a biomineral supplemental blend for the replacement of hydraulic cement to create sustainable cement and concrete with composition comprising a biomincralizcd algae, a silica source, pozzolan, biochar and / or bio- fly ash; and an aggregate; where the aggregate comprises a primary binder, a secondary binder, sand and / or rock, hydraulic cement, filler material(s), and admixtures. Also disclosed herein is a method of manufacturing a transportable dry biomineral supplemental blend composition comprising blending together a microorganism package, a biomineralized algae, biochar and / or bio-fly ash, and pozzolan; mixing the biomincral supplemental blend with hydraulic cement, cementitious materials, and liquid media to form a sustainable cement; and mixing the sustainable cement with an aggregate to form a sustainable concrete.

The invention relates to the technical field of building materials, and discloses a preparation method of a functional additive of antibacterial and mildew-proof dry-mixed putty mortar, which comprises the following steps: dispersing an inorganic porous carrier in water, and adding a plant polyphenol solution for adsorption loading; then adding soluble silicate, adjusting the pH value of the system to be acidic or weakly acidic, and carrying out in-situ gelation reaction to form a silica gel blocking layer on the surface of the carrier; and adding a metal salt solution to carry out heating coordination reaction, and carrying out solid-liquid separation, washing, drying and crushing to obtain a finished product. Intelligent slow release and oxygen isolation protection of active components are achieved by constructing a pH response type silica gel layer and a metal-polyphenol coordination network, the additive effectively solves the problems of serious delayed coagulation and oxidation discoloration caused by plant polyphenol in an alkaline putty system, an active silicon source generated by dissolution of the silica gel layer can be subjected to a pozzolanic reaction, and the pH response type silica gel layer and the metal-polyphenol coordination network can be used for preparing the alkaline putty. The bonding strength of the putty layer is obviously improved.

The present disclosure includes methods and systems of producing pozzolanic supplementary cementitious materials and / or aluminum compounds / additives and cementitious compositions with the pozzolanic supplementary cementitious materials and / or aluminum compounds / additives. These methods can include leaching a feedstock material with acid to produce a leachate and a residual solid, wherein the feedstock material comprises aluminum, silicon, and at least one of iron, calcium, and magnesium; separating the leachate comprising dissolved metal cations and the corresponding anions from the residual solid comprising the silicate and / or aluminosilicate; drying the residual solid to create pozzolanic supplementary cementitious material comprising the residual solid; adding a precipitating agent to the leachate solution to form an aqueous solution and a solid precipitate comprising an aluminum compound / additive; and separating the aluminum compound / additive precipitate from the aqueous solution.

The invention comprises a method of making lime, dolomitic lime, hydraulic cement such as portland cement clinker and co-products such as pozzolan, acids, alumina, silica and the like while producing reduced amounts of carbon dioxide. The method comprises combining hyaloclastite with a first acid to form a first salt, combining the first salt with a second acid to form a second salt and heating the second salt to form an oxide.

An inorganic quick-setting filling material and its preparation method, including material A and material B. Material A is made from the following components by weight: 25-35 parts of sulfoaluminate cement, 30-40 parts of blast furnace slag, 10-20 parts of waste gypsum, 1-3 parts of recycled alumina fiber, 5-10 parts of volcanic ash, 0.8-1.2 parts of (3,6-diaminoacridin-9-yl)boronic acid; Material B is made from the following raw materials by weight: 4-6 parts of functional water-soluble resin, 1-2 parts of 3-(N-morpholino)-2-hydroxypropanesulfonate sodium, 0.5-0.8 parts of sucralose, 0.1-1 part of sodium lignosulfonate, 0.8-1.2 parts of 1,3,5-triglycidyl-S-triazine trione, 0.1-0.5 parts of N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid sodium salt. This material has good quick-setting effect, high compressive strength, excellent flame retardant and antistatic properties, and long service life.

The invention provides a high-strength lightweight water permeable brick as well as a preparation method and application thereof, and relates to the technical field of building materials. According to the method, the iron tailings are ground and calcined and activated in the presence of the limestone, silica, aluminate and other mineral substances in the iron tailings are combined with calcium to generate phase change and are converted into a mineral phase with high pozzolanic activity, and therefore the hydration reaction activity of the iron tailings is enhanced. The aluminum ash is ground and subjected to calcination denitrification modification in the presence of the quick lime, the aluminum ash and the quick lime react to generate calcium aluminate, dicalcium aluminate and an amorphous silicon-aluminum phase, high hydration reaction activity is achieved, and the early strength of the material can be improved; the modified aluminum ash is uniformly and stably foamed, so that the micro-pore structure of the prepared water permeable brick is relatively high in homogeneity; meanwhile, the Portland cement, the sulphoaluminate cement and the auxiliary additive are adopted, so that the water permeable brick has early strength, long-term strength and durability, and the comprehensive performance of mechanical property and water permeability is excellent.

This invention provides a highly protective cement safe resistant to drilling impact, comprising an outer shell, an inner liner within the outer shell, a filling cavity formed between the outer shell and the inner liner, a concrete protective layer within the filling cavity, and a sealing cap on the top of the outer shell. The concrete protective layer, used in the safe, comprises the following components: 4200-4800 parts of hydraulic cementitious material, 1600-2200 parts of pozzolanic mineral admixture, 450-650 parts of active mineral admixture, 450-650 parts of fine inert filler, 4200-5200 parts of graded high-hardness fine aggregate, 850-900 parts of water, 70-85 parts of high-efficiency water-reducing agent, 12-20 parts of defoamer, and 1100-1300 parts of end-hooked steel fiber. The components of this invention work synergistically to effectively improve the bonding performance between concrete and the steel plate matrix, inhibit shrinkage and cracking during curing, and enhance product lifespan and structural stability.

The application discloses a concrete production method, comprising the following steps: step 1, determining the quantity of materials needed to be added to ordinary concrete according to the required compressive strength of the roller compacted concrete; step 2, sequentially adding the required materials into the ordinary concrete and performing roller compacting mixing in the concrete; step 3, adding an admixture into the concrete obtained in step 2 through a low-temperature high-pressure spraying mixing mode; and step 4, adding asphalt into the concrete obtained in step 3 and uniformly mixing to obtain the roller compacted concrete. Further, the materials comprise stone powder, fly ash and pozzolanic admixture. The application increases the hardness and compressive strength of the ordinary concrete through material adding and process treatment, so that the roller compacted concrete can be produced on site when the demand is small, and factory ordering is not needed, thereby saving the construction cost.

Lime-based cement extender or cement replacement compositions and formulations, and associated systems and methods are disclosed herein. In some embodiments, a lime-based cement extender or cement replacement composition includes at least 5% by weight lime particles and at least 50% by weight pozzolan particles. In some embodiments, the pozzolan particles include silicon dioxide and aluminum oxide. In some embodiments, composition can be combined with admixtures and / or aggregates to produce a formulation. The formation can have at least 5.000 ppm soluble sulfate and an alumina: silica ratio of at least 0.2: 1. Methods of accelerating formation of calcium aluminum sulfates to avoid sulfate attacks during critical periods include producing a formulation with high aluminum oxide content, admixtures configured to accelerate certain chemical reactions, and omitting limestone. Methods of delaying formation of calcium aluminum sulfates to avoid sulfate attacks during critical periods include producing a formulation with admixtures configured to delay certain chemical reactions.

The invention relates to the technical field of concrete, in particular to an inorganic multi-component gelling agent suitable for early-strength and high-strength sprayed concrete, which comprises the following components in parts by weight: 180-260 parts of composite activator system; 150 to 220 parts of a bio-based toughening network material; 5-8 parts of an intelligent slow-release water retention component; 60-80 parts of an interface reinforcing material; 120 to 150 parts of a volcanic ash activity regulating agent; 15 to 18 parts of a polycarboxylic acid water reducer; and 50-80 parts of calcium carbonate whiskers. The gelling agent aims to improve the early strength, compressive strength and flexural strength of sprayed concrete while maintaining good workability and volume stability. Through innovative material design and accurate component regulation and control, the comprehensive performance breakthrough of early strength, high toughness, durability and easy construction of the sprayed concrete material is realized, and the sprayed concrete material has remarkable technical advancement and engineering application value.

Pumpable slurry compositions comprising at least one aluminosilicate additive and optional pozzolanic cement additives and methods for improving development of compressive strengths in the pumpable cement slurry compositions are disclosed herein. The methods utilize one or more pumpable cement slurry compositions comprising at least one cement component, water, at least one first aluminosilicate additive, at least one optional second aluminosilicate additive, and one or more optional pozzolanic additives, wherein the at least one first aluminosilicate additive has an amorphous phase of greater than about 50% and a weight ratio of silica oxide to aluminum oxide of about 1.0 to about 2.5, and the at least one optional second aluminosilicate additive has a weight ratio of silica oxide to aluminum oxide of about 1.7 to about 3.3.

The invention relates to the technical field of building materials, and discloses a burning-free steam-curing-free all-solid waste type iron tailing artificial fine aggregate and a preparation method thereof.The preparation method comprises the following steps that iron tailings are dried and screened, and iron tailing powder with the particle size smaller than 0.3 mm is obtained; mixing the pozzolanic material, the exciting agent, the expanding agent and the reinforcing agent, and uniformly stirring to obtain an all-solid waste cementing material; the iron tailing powder and part of the all-solid waste cementing material are mixed, ground and stirred evenly, and a mixture is obtained; carrying out rolling and watering treatment on the mixture to obtain iron tailing microspheres with the diameter of 1-4mm; adding the residual all-solid waste cementing material into the iron tailing microspheres for rolling treatment, so that the surfaces of the iron tailing microspheres are wrapped with the all-solid waste cementing material, and composite particles with core-shell structures are obtained; the composite particles of the core-shell structure are subjected to curing treatment, and the iron tailing artificial fine aggregate is obtained. Energy consumption, carbon emission and production cost can be reduced, high-value utilization of multi-element solid waste is realized, and shortage of natural gravel aggregate is relieved.

The invention relates to the technical field of building materials, and particularly discloses a green and environment-friendly thermal insulation building material and a preparation method thereof. The invention relates to a green environment-friendly thermal insulation building material, which comprises the following raw materials by weight: 20-30 parts of modified epoxy resin; 10 to 15 parts of polyurethane; 5 to 10 parts of flame-retardant vermiculite; 5 to 10 parts of kaolin; 6-10 parts of perlite powder; 8-12 parts of volcanic ash; 5-8 parts of asbestos; 5-8 parts of fly ash; 1-5 parts of a flame retardant; 5-10 parts of calcium carbonate; 3-6 parts of a heat stabilizer; 2-4 parts of a curing agent; and 100 to 150 parts of water. According to the heat-preservation and heat-insulation building material, the phosphorus-containing flame-retardant groups are grafted on the epoxy resin, and a phosphide film formed by heating phosphorus elements can effectively isolate oxygen and inhibit a combustion reaction, so that the flame-retardant property of the building material is effectively enhanced.