1038 results about "Phosphogypsum" patented technology

The invention discloses high-performance fluid-state solidified soil for backfill based on composite ardealite of building residue soil, which is prepared by taking the building residue soil as a core raw material, taking a compound of a polycarboxylic acid water reducer and hydroxypropyl methyl cellulose as a fluidization regulator, and mixing the fluidization regulator and the building residue soil to prepare the high-performance fluid-state solidified soil for backfill. Superfine slag powder, fly ash, nano silicon dioxide, metakaolin and ardealite are used as curing agents, so that the fluid-state solidified soil with strong performance is obtained. Through the synergistic effect of all the components and innovative processes such as liquid nitrogen low-temperature grinding, nano material compounding and a segmented vacuum stirring process, the effect that the ultrahigh strength of the construction waste soil reaches 7.5 MPa within 14 days is achieved for the first time and is improved by 40% or above compared with that of conventional solidified soil, and the industrial problem that traditional waste soil is insufficient in solidification strength is solved; and collaborative optimization of strength and fluidity is realized. Meanwhile, efficient resource utilization of the construction waste is achieved, land occupation and environmental pollution caused by muck landfill are greatly reduced, and the requirement for green and sustainable development is met.

The invention relates to the technical field of building materials, and particularly discloses a slag and ardealite synergetic activated gypsum batten and a preparation method thereof.The slag and ardealite synergetic activated gypsum batten comprises pretreated ardealite, superfine slag powder, a composite exciting agent, reinforced fibers, self-repairing microcapsules, a foaming agent and water, and the composite exciting agent is formed by compounding nano SiO2, CaO and metakaolin; the preparation method comprises the following steps: mixing nano silica sol and a lignin solution, performing spray drying, and performing heat treatment to obtain the self-repairing microcapsule; the preparation method comprises the following steps: carrying out dry mixing on pretreated phosphogypsum, superfine slag powder and a composite exciting agent, adding water, adding reinforced fibers, self-repairing microcapsules and a foaming agent, stirring to form slurry, carrying out injection molding on the slurry, and carrying out stepped maintenance of pre-maintenance, main maintenance and carbonization treatment to prepare the modified red mud-pretreated phosphogypsum-based self-repairing self-repairing composite phosphogypsum-based self-repairing self-repairing composite phosphogypsum-based self-repairing composite phosphogypsum-based self-repairing composite phosphogypsum-based self-repairing composite phosphogypsum. The composite excitant synergistically activates the activity of the slag, and is matched with the reinforced fibers, the self-repairing microcapsules and stepped curing, so that solid waste resource utilization is realized, the compression resistance, bending resistance and impact resistance of the batten are improved, and the environment-friendly and high-performance effects are achieved.

The invention discloses a preparation process of a waste concrete recycled aggregate gypsum-based wall material, which comprises the following steps: (1) mixing a water repellent agent with an anhydrous solvent to obtain a pretreating agent, and then adding concrete recycled aggregate for standing; and separating out the recycled aggregate and drying the recycled aggregate to obtain the pretreated recycled aggregate. (2) calcining the magnesium oxide whisker, and then adding the obtained calcined whisker into an ethanol solution of polyethylene glycol to form a suspension; and spraying the suspension on the continuously stirred pretreated recycled aggregate, and then carrying out heating and stirring treatment to obtain the modified recycled aggregate. And (3) uniformly stirring ardealite powder, silica fume, potassium hydroxide powder and fine aggregate, then adding water, a retarder and a water reducing agent, uniformly stirring, then adding the modified recycled aggregate, and uniformly stirring, thereby obtaining the product. The process provided by the invention not only reduces the adverse effect of the recycled aggregate on the gypsum-based material, but also improves the water resistance of the gypsum-based material and enhances the mechanical strength.

The invention discloses a high belite iron aluminate cement clinker, which is prepared from the following raw materials in parts by weight: 39 to 73 parts of carbide slag, 8 to 37 parts of low-grade bauxite, 10 to 16 parts of ardealite, 1 to 31 parts of fly ash and 3 to 9 parts of steel slag. According to the cement clinker, the resource utilization rate of industrial solid waste in cement preparation can be remarkably increased, and dependence on natural raw materials and high-grade raw materials is reduced; impurities in various solid wastes can be used as in-situ mineralizing agents and activating agents, and on the basis of realizing high-added-value resource utilization of various industrial solid wastes and low-grade bauxite, efficient synthesis of target minerals at a relatively low temperature is promoted; and gradient temperature control calcination and gradient cooling processes are further combined, so that sufficient crystallization and development of a target mineral phase can be effectively promoted, a clinker microstructure is optimized, excellent early strength and continuously increased later strength of the cement are ensured, and the common problems of strength shrinkage and the like of the traditional solid waste-based cement can be effectively avoided.

The invention relates to the technical field of floor slab concrete, and discloses aerated concrete applied to sound insulation and heat preservation of a floor slab and a preparation method of the aerated concrete aiming at the problems that an existing sound insulation floor slab containing the aerated concrete is poor in structural stability, namely the sound insulation effect and the long-term effect of mechanical properties are poor and the like. Comprising 30-40 parts of fly ash, 25-35 parts of sand, 15-20 parts of ardealite, 10-15 parts of quick lime, 5-8 parts of silicon-aluminum porous microspheres, 3-5 parts of slaked lime, 1-2 parts of Fe3O4-polypropylene fiber and 0.2-0.5 part of aluminum powder. The preparation method of the silicon-aluminum porous microspheres comprises the following steps: mixing a silicon source, an aluminum source and a surfactant, and uniformly stirring to obtain silicon-aluminum homogenate; and adding nano titanium dioxide, carrying out ultrasonic dispersion and freeze drying, transferring into a heating furnace, and heating and calcining to obtain the silicon-aluminum porous microspheres. The supporting and strengthening effects on pores are realized through gas production reaction and the like in the material, so that the structural strength and durability of the aerated concrete are improved.

The invention relates to the technical field of building materials, in particular to light water-resistant phosphogypsum-based cement concrete mortar and a preparation process thereof. The phosphogypsum-based cement concrete mortar comprises the following components: activated phosphogypsum, sulphoaluminate cement, magnesium phosphate cement, modified zeolite powder, lightweight aggregate, modified nano silicon dioxide, a core-shell toughening agent, a polycarboxylate superplasticizer and water, and the preparation method comprises the following steps: respectively preparing the activated phosphogypsum, the modified zeolite powder, the modified nano silicon dioxide and the core-shell toughening agent; the water resistance of the ardealite is improved through activating treatment, the interface bonding force and the structural compactness are enhanced through multi-component synergism by means of selective adsorption of the modified zeolite powder, the mechanical property of the lightweight aggregate is optimized, the toughness is improved through the core-shell toughening agent, and lightweight, high water resistance, stable performance and durability improvement of the mortar are achieved; the requirements of complex building scenes are met, and environment-friendly and practical values are achieved.

The invention discloses a soil conditioner for saline-alkali soil and a preparation method and application thereof, and belongs to the technical field of solid waste resource utilization and soil improvement, the soil conditioner for saline-alkali soil comprises the following raw materials: coal gangue, ardealite and an auxiliary agent, and the mass ratio of the coal gangue to the ardealite to the auxiliary agent is (20-60): (20-60): (10-30). The preparation method comprises the following steps: drying and crushing the raw materials, uniformly mixing, mechanically activating or thermally activating the mixture, and screening to obtain the soil conditioner. According to the invention, the raw materials are subjected to synergistic activation treatment, so that the obtained soil conditioner achieves good effects in the aspects of increasing the content of effective silicon and adsorbing heavy metals, the problem that single performance is prominent and the other performance is obviously insufficient is avoided, and the improvement target of double-effect collaboration is achieved. And the soil conditioner not only can effectively supplement nutrient elements such as silicon in the saline-alkali soil, but also can remarkably adsorb and passivate heavy metals (such as cadmium, nickel, copper, lead and chromium), so that the soil fertility and the environmental safety are improved at the same time. Besides, solid wastes such as the coal gangue and the ardealite are used as main raw materials, so that the method has the advantages of low cost, high resource utilization rate, environmental friendliness and the like, and conforms to the green and sustainable development concept.

The invention discloses a multi-element solid waste synergistic excitation road material and a preparation method thereof. The multi-element solid waste synergistic excitation road material comprises the following raw material components: an activated matrix material (consisting of 85-90% of red mud, 7-15% of carbide slag and 3-5% of ardealite), and silica fume, 1-hydroxyethylidene-1, 1-diphosphonic acid, anhydrous sodium sulfate and water which respectively account for 4-6%, 0.2-0.4%, 0.8-1.2% and 30% of the mass of the activated matrix material. Pores are filled with silica fume in the raw materials, and C-S-H gel with low calcium-silicon ratio is generated, so that a water migration channel is blocked; hydroxyethylidene-1, 1-diphosphonic acid is chelated with free metal ions, saltpetering and ion interference are inhibited, and the ettringite structure is stabilized; carbide slag and ardealite cooperate to destroy a red mud silicon-aluminum network, accelerate dissolution of active ions and promote crystal generation; the anhydrous sodium sulfate accelerates formation of an ettringite framework through exogenous SO4 < 2->; the strength and water stability of the road material can be effectively improved. The raw materials are mainly industrial solid wastes, so that the consumption of natural resources is remarkably reduced, and the efficient collaborative consumption of a large amount of solid wastes is realized.

The invention provides an environment-friendly sludge curing stabilizer and a preparation method thereof, and the environment-friendly sludge curing stabilizer comprises the following components in parts by weight: 10-25 parts of modified aggregate; 60-70 parts of a cementing agent; 5-30 parts of a water absorbent; the modified aggregate is formed by mixing silica fume and steel slag particles, the cementing agent is composed of slag, fly ash and bentonite, and the water absorbing material is composed of semi-hydrated phosphogypsum, quick lime and red mud; the curing stabilizer is composed of modified aggregate, a cementing agent and a water absorbing material. The environment-friendly sludge curing stabilizer prepared by the invention is used for treating sludge, the water content in 3d is reduced by 80% or more, and the compressive strength exceeds 3MPa; the water content within 14 days is reduced by 90% or above, the compressive strength can reach 6 MPa or above, the compressive strength exceeds the strength grade requirement of a roadbed material, meanwhile, the leaching concentration of heavy metal in the sludge is reduced by 95% or above, the sludge can be used as a building material for resource utilization, and the method has important significance on resource utilization, land occupation reduction and environmental pollution reduction. Wide popularization and application prospects are realized.

The invention provides a method for quality-divided regeneration of silicon dioxide from ardealite by using a flotation and acid leaching coupling melting purification technology, and relates to the technical field of regeneration of silicon dioxide from ardealite, the method comprises the following steps: S1, adding a nonionic collecting agent into ardealite ore pulp for reverse flotation to obtain rough machining ardealite; s2, carrying out direct flotation on the rough machining ardealite obtained in the step S1 to obtain silicon ardealite tailings; s3, drying and crushing the silicon phosphogypsum tailings, uniformly mixing the silicon phosphogypsum tailings with a washing agent, and acidizing to remove impurities, so as to obtain silicate; and S4, adding the silicate obtained in the step S3 into a dissolving agent, reacting to obtain silicon dioxide colloid, and calcining to obtain silicon dioxide with the purity as high as 99.9%.

The application discloses a method for preparing low-carbon clinker by electrolytic manganese residue and phosphogypsum, and the method comprises the following steps: obtaining phosphogypsum, electrolytic manganese residue and carbonaceous raw materials, drying and crushing, and then mixing and grinding according to the modified C:S, KH value and total CaO:SiO2 mass ratio; the obtained mixture is added with water to form material balls, and then the material balls are dried; the dried material balls are calcined in an oxygen-deficient or oxygen-free environment, and then the low-carbon clinker is obtained after cooling; and the reduction components in the electrolytic manganese residue are used for decomposing the phosphogypsum, so that the industrial solid wastes, i.e., the electrolytic manganese residue and the phosphogypsum, are effectively and cooperatively utilized, and energy is saved; except for the carbonaceous raw materials, the total utilization rate of the electrolytic manganese residue and the phosphogypsum in the batching reaches 100%, the industrial solid wastes, i.e., the electrolytic manganese residue and the phosphogypsum, are effectively and cooperatively utilized, the amount of the carbonaceous raw materials required for decomposing the phosphogypsum is reduced, the cost and carbon emission are reduced, and the low-carbon clinker is synchronously prepared.

The invention relates to the technical field of water-stable layer materials, in particular to a microcapsule self-repairing ardealite water-stable layer material and a preparation method and application thereof.The preparation method comprises the following steps that S1, ardealite, slag powder and a modified coagulant are mixed in a mixer, and a preliminary modified mixture is obtained; s2, adding double microcapsules into the primary modified mixture to obtain a secondary modified mixture; s3, adding deionized water into the modified mixture obtained in the step S2, and stirring and mixing to obtain a modified wet mixture; and S4, injecting the modified wet mixture into a mold, vibrating to remove bubbles, standing at room temperature, and demolding and curing for 25-28 days to obtain the microcapsule self-repairing phosphogypsum water-stable layer material. Through the synergistic effect of the double microcapsules and the modified coagulant, the integrated function of rapid coagulation, self-repairing and toughness enhancement is achieved, it is guaranteed that a strength framework is rapidly formed in a high-humidity environment, meanwhile, immediate repairing can be provided for micro-damage, and the toughness and crack resistance of the material are macroscopically improved.

The invention provides a method for preparing vaterite type nanoscale calcium carbonate with ardealite as a raw material and application of the method, and relates to the technical field of inorganic nano-material preparation.The method comprises the following steps that firstly, efficient dissociation of calcium ions in the ardealite is achieved through a phase transfer method, then digestion treatment is conducted on a leaching solution, and the leaching solution is obtained; a crystal morphology regulating agent is further introduced to construct a mineralized microenvironment, and then through a carbon dioxide carbonization reaction, vaterite type nano-scale calcium carbonate with a specific average particle size (200-400 nm) is prepared. According to the preparation method, natural high polymer materials such as collagen are introduced in the preparation process to serve as green crystal form guiding agents, so that the coordination effect of the natural high polymer materials and calcium ions can be utilized, the crystal morphology can be effectively regulated and controlled, and the biocompatibility of the nano material is improved; and the application possibility of calcium carbonate in the biomedical fields of drug carriers, bone repair materials and the like is expanded.

The invention discloses a phosphogypsum-based calcination-free low-carbon cementing material and a preparation method thereof. The phosphogypsum-based calcination-free low-carbon cementing material comprises the following components in percentage by weight: 10%-35% of phosphogypsum, 10%-35% of desulfurized gypsum, 5%-20% of sewage treatment sludge, 10%-35% of fly ash, 10%-35% of yellow phosphorus slag and 5%-20% of phosphorus tailing slag. The total amount of the ardealite and the desulfurized gypsum is controlled within 45%, and the total amount of the fly ash and the yellow phosphorus slag is controlled within 45%. The technical problems that an existing phosphogypsum-based cementing material is low in early strength, poor in performance stability and high in cost are effectively solved through a multi-solid-waste synergistic compatibility design and a calcination-free process.

The invention discloses an ardealite modified catalyst and application thereof, an ardealite-based low-carbon cementing material and a preparation method of the ardealite-based low-carbon cementing material. The modified catalyst comprises triethanolamine, a calcium-based compound, aluminum salt, glycerin, polyethylene glycol, zeolite powder and P.042.5 cement. The modified ardealite is prepared by mixing ardealite and the modified catalyst; the modified phosphogypsum is mixed with S95-grade mineral powder, I-grade or II-grade fly ash, an ultrafine admixture and limestone powder to prepare the phosphogypsum-based low-carbon cementing material. The preparation method has the beneficial effects that the modified catalyst adopts an organic-inorganic-mineral ternary composite catalytic system for the first time, impurity passivation, crystal reconstruction and in-situ reaction can be synchronously realized, a micro-nano crystal nucleus material is generated, and the modified phosphogypsum-based low-carbon cementing material can completely replace cement for use; according to the present invention, the strength of the cementing material can be adjusted, the carbon emission is reduced by more than 75% compared with the traditional cement, and the maximum consumption of the phosphogypsum in each ton of the cementing material product can be up to 300 kg.

The invention discloses a ternary solid waste gelling system mine cemented filling material, a preparation method and application, phosphogypsum and water-quenched slag powder are used as main gelling components, carbide slag is used as an exciting agent, and phosphate tailings and phosphorus tail mud are used as filling body aggregate to form the high-content phosphogypsum ternary solid waste gelling system mine cemented filling material. Wherein the ternary solid waste gel system comprises the following components in percentage by weight: 10-18% of carbide slag, 36-54% of ardealite and 36-54% of water-quenched slag powder, and the ratio of ardealite / (ardealite + water-quenched slag powder) is 0.4-0.6. The mine cemented filling material disclosed by the invention is prepared by taking solid wastes of industrial byproducts of a phosphorite mountain and the periphery of the phosphorite mountain as main raw materials, and the mechanical property of the prepared filling slurry after solidification needs to meet an engineering filling strength index, so that efficient resource utilization of a large amount of industrial solid wastes for phosphorite resource development can be realized; good mechanical properties and remarkable economic and environmental benefits are achieved.

The invention discloses artificial soil based on manganese slag, red mud and ardealite. The artificial soil is mainly prepared from a manganese slag-red mud-ardealite mixed matrix and a modifier, the weight ratio of the manganese slag to the red mud to the ardealite in the manganese slag-red mud-ardealite mixed matrix is (0.4-1.6): (0.1-0.5): (0.5-0.9); the modifier comprises calcium oxide, and further comprises rice straw, biochar, zeolite or a combination thereof, and the modifier accounts for 1-15% of the weight of the artificial soil. Accordingly, a corresponding preparation method is also established. According to the method, the three solid wastes are mixed according to the characteristics, so that specific pollutants such as ammonia nitrogen, phosphorus, fluorine and Mn < 2 + > can be fixed, the reduction of heavy metals is realized, the nutrients beneficial to plant growth are reserved, the artificial soil with rich nutrients is synchronously reconstructed, the qualitative change from waste residues to resources is realized, the process is simple, and the effect is good. The obtained artificial soil can be used for greening planting, supplementing manganese ore, aluminum ore and phosphorite surrounding soil deficiency areas, and solving the problems of no soil, ploughability and ecological restoration of mining areas.

The invention provides a phosphogypsum-based composite low-temperature heat storage material based on lattice defects and a preparation method of the phosphogypsum-based composite low-temperature heat storage material. The phosphogypsum-based composite low-temperature heat storage material comprises a hydratable calcium sulfate material, a zinc-containing compound and a heat-conducting framework material, wherein the hydratable calcium sulfate material comprises one or more of anhydrous phosphogypsum and semi-hydrated phosphogypsum; the heat-conducting framework material comprises any one of expanded graphite, graphene, carbon nanotubes, boron nitride or silicon carbide. The material prepared by the invention has low phase change temperature, high heat storage density, high heat conductivity and excellent cycle stability, and overcomes the key technical bottleneck of the traditional hydrated salt and ardealite-based heat storage material at one stroke.

The invention relates to the technical field of ardealite treatment technology, and discloses a method and a system for harmless treatment of ardealite, which are characterized in that fresh ardealite discharged by wet-process phosphoric acid filtration is re-pulped and then sequentially passes through a first-section reaction tank (added with fly ash and cement), a tank A of a second-section reaction tank, a tank B of the second-section reaction tank and a tank C of the second-section reaction tank for continuous reaction; performing solid-liquid separation to obtain harmless phosphogypsum; after the filtrate is settled, supernate is reused for repulping and lime milk preparation, and thick slurry is returned to the reaction tank; the reaction waste gas is washed with phosphoric acid acidic water, and washing liquid is reused for ore grinding; through multi-stage reaction and accurate pH control, the phosphogypsum stably reaches the class I solid waste standard, and the curing time is shortened from traditional several days to several hours; the system is deeply coupled with a front-end phosphoric acid system, and water balance and resource circulation of the system are realized by optimizing and filtering a washing water source and recycling steam condensate water; the process has the advantages of low cost, stable quality and flexible operation.

The invention relates to the technical field of building materials, in particular to all-solid waste alkali-activated recycled concrete and a preparation method thereof. The concrete is prepared from the following raw materials in parts by weight: 360 to 500 parts of blast furnace slag, 180 to 400 parts of recycled concrete, 90 to 270 parts of recycled red bricks, 40 to 90 parts of silica fume, 30 to 90 parts of phosphogypsum, 240 to 370 parts of iron tailing sand, 350 to 420 parts of recycled concrete coarse aggregate, 200 to 400 parts of alkali activator, 10 to 30 parts of polycarboxylate superplasticizer, 20 to 50 parts of sodium tetraborate decahydrate and 300 to 500 parts of water. According to the invention, through fine proportioning and functional synergy of all the components, a solution of all-solid waste concrete with excellent mechanical properties, durability, construction performance and economical efficiency is provided, and the concrete has a wide application prospect in the fields of green buildings and solid waste recycling.

The invention discloses an ardealite-based flow-state self-compacting roadbed filling material as well as a preparation method and a construction method thereof. The roadbed filling material comprises the following components in percentage by mass: 20-30% of modified ardealite, 15-25% of modified solid waste micro powder, 20-60% of a cement curing agent and 0.5-1.2% of a thickening time control agent, the modified ardealite is obtained by calcining solid waste ardealite at 600-800 DEG C for 2-4 hours; the modified solid waste micro powder is obtained by mixing and grinding slag and steel slag. The solid waste ardealite is modified and combined with the steel slag and the mineral slag to form an ardealite-mineral slag-steel slag ternary synergistic curing system, the rheological property and the early strength of the material are remarkably improved by combining the cement curing agent, and the fluidity and the setting time of the slurry are effectively regulated and controlled through the thickening time control agent; the self-compaction performance and construction efficiency in the construction process are guaranteed, meanwhile, the consumption amount of solid waste ardealite is increased, the cement consumption and carbon emission are reduced, and the self-compaction ardealite concrete can be suitable for construction under complex working conditions such as narrow space or special geological conditions.

The invention relates to the technical field of packaging materials, in particular to a manufacturing method of an industrial byproduct semi-hydrated gypsum hollow plastic plate. The plastic plate is prepared from the following components in parts by weight: 60 to 70 parts of superfine modified semi-hydrated phosphogypsum powder, 28 to 35 parts of polypropylene resin, 0.5 to 1.5 parts of slipping agent, 0.5 to 1.5 parts of dispersing agent, 0.5 to 1.5 parts of antistatic agent, 0.3 to 0.8 part of antioxidant, 5 to 10 parts of calcium oxide and 3 to 6 parts of polyolefin elastomer. The gypsum powder subjected to purification, calcination and quaternary ammonium / stearic acid surface treatment has oleophylic and hydrophobic properties, and 65% high-proportion filling can be realized; the light moisture-proof plate with the density of 0.75-0.95 g / cm < 3 > and the thickness of 3-6 mm is obtained by matching with a double-screw granulation process and a single-screw hollow plate extrusion process, the use amount of resin is reduced, the mechanical property and the heat resistance are obviously superior to those of a single surface modifier, and high-value utilization of ardealite resources is realized.

The invention discloses an efficient consolidation agent for tailings in an underground mine filling mining method and a preparation method thereof, and relates to the technical field of consolidation agents, the consolidation agent is prepared from a gelling base material, a nano reinforcing agent, a chemical exciting agent and an organic fiber reinforcing agent according to a specific mass ratio; aiming at the problems of unstable volume, insufficient strength and the like of a traditional consolidation agent, through high-temperature calcination of the steel slag to eliminate harmful components, dealkalization treatment of the red mud, acid activation of the phosphogypsum and volcanic ash reaction of the fly ash, the volume stability and the gelling activity of a filling body are remarkably improved, and the consolidation agent is suitable for complex underground environment requirements; aiming at the pain points of low early strength, weak interface bonding and the like of the consolidation agent, the cohesion is improved by strong bonding of the surface-modified nano SiO2 and a gelling base material, a chemical exciting agent is added to cooperate with CO2 carbonization to generate nano crystal nucleuses, hydration sites are provided, a pore structure is optimized, bleeding is inhibited, the fluidity and stability of slurry can be effectively improved, and the consolidation effect is good. And the requirements of underground filling homogeneity and pumpability are met.

The building block is prepared from the following raw materials in parts by weight: 30 to 60 parts of ardealite, 0.5 to 2 parts of lime, 10 to 30 parts of slag, 0 to 2.5 parts of silica fume, 0 to 2.5 parts of fly ash, 1 to 5 parts of cement, a water reducing agent with the mass ratio of 0.5 to 1.5 percent of ardealite, 8 to 12 parts of water, 10 to 20 parts of an acrylic acid metal salt mixed solution, 0.5 to 2.5 parts of a water repellent agent and 15 to 50 parts of aggregate, the acrylic acid metal salt mixed solution contains calcium ions or / and magnesium ions; through the in-situ polymerization synergistic effect among the cement, the lime, the inorganic active material and the acrylic acid metal salt solution, the inorganic-organic hybrid gel efficiently and stably solidifies the phosphogypsum, harmful ions are converted into insoluble and thermodynamically stable forms, and efficient and stable phosphorus, fluorine and heavy metal immobilization is achieved. The mixing amount of the phosphogypsum is as high as 30-60%, the building block has good mechanical properties, the 28-day compressive strength of the building block is greater than or equal to 30 MPa, and the breaking strength is greater than or equal to 3.5 MPa; and through surface modification treatment of the hydrophobic agent, a hydrophobic film is formed on the surface of the ardealite, the hydrophobic performance of the surface of the ardealite is enhanced, the water resistance of the ardealite is improved, and the water absorption rate of the building block is less than or equal to 5.0%. And the preparation process has the advantages of low cost, simplicity and convenience in operation, environment friendliness and the like.

The invention belongs to the technical field of carbon emission accounting, and particularly relates to a life cycle carbon footprint determination method for ardealite utilization and disposal, which is characterized in that the whole life cycle of ardealite treatment and disposal is divided into a raw and auxiliary material production stage, a raw and auxiliary material transportation stage, an ardealite harmless stage, an ardealite comprehensive utilization stage and an ardealite stockpiling stage; respectively quantifying to obtain the carbon emission of each stage, namely C production, C transportation, C harmlessness, C utilization and C stockpiling; and calculating to obtain the total carbon emission C in the whole life cycle of phosphogypsum treatment. The method can promote the resource utilization of the phosphogypsum, reduce the influence of the phosphogypsum on the environment, promote the green transformation of related industries, and meet the national sustainable development goal. And the method can also be widely applied to carbon footprint accounting of other industrial byproducts, and a new solution is provided for realizing low-carbon economy. Through effective management and utilization of ardealite, the method provides a feasible technical support for ecological environment protection and resource saving.

The invention discloses an industrial solid waste-based phosphogypsum-based curing agent as well as a preparation method and application thereof. According to the curing agent, industrial solid wastes such as slag powder, fly ash and steel slag powder are used as main inorganic gelling components, and are matched with a sodium carboxymethyl cellulose-waterborne epoxy resin organic modification system, a nano-modified silicon dioxide-graphene oxide reinforcing component and a silane coupling agent interface modifier; the curing agent is prepared through a low-temperature grinding activation and ultrasonic dispersion process, and through the cooperation of a quaternary system of multi-element industrial solid waste cooperative activation-organic / inorganic interface enhancement-nanomaterial functionalization-toxicity reduction synergistic effect, the problems that an ardealite base layer is low in strength, poor in water resistance and high in environmental protection risk are solved; the method is suitable for heavy traffic base engineering such as expressways, and efficient recycling and low-carbon preparation of industrial solid waste are achieved.

The invention discloses sound insulation mortar, a preparation method, a sound insulation mortar system and a construction technology, and belongs to the field of building materials. The phosphogypsum-based low-carbon thermal insulation and sound insulation mortar is prepared from the following raw materials in parts by weight: 50 to 60 parts of phosphogypsum, 20 to 30 parts of filler, 10 to 15 parts of inorganic admixture, 10 to 15 parts of glass beads, 5 to 10 parts of aerogel, 0.1 to 0.5 part of water-retaining agent, 1 to 4 parts of polymer rubber powder, 0.02 to 0.05 part of retarder and 0.2 to 0.5 part of water reducing agent. The ardealite-based low-carbon thermal insulation and sound insulation mortar is compact in structure and good in crack resistance, and has an excellent sound insulation effect on the premise of ensuring that the mechanical property reaches the standard. The thermal-insulation and sound-insulation material is good in fire resistance and outstanding in aging resistance and durability in the long-term use process, has convenient construction performance and can fully meet the comprehensive use requirements of constructional engineering for thermal-insulation and sound-insulation materials.

The invention relates to the technical field of mixed gels, in particular to a preparation method and application of a composite solid waste-based cementing material, and the preparation method comprises the following steps: grinding dried granulated blast-furnace slag, steel slag, fly ash, iron tailings, phosphogypsum and Portland cement, mixing to obtain a pretreated powder raw material, adding a modified activator into the pretreated powder raw material, and uniformly mixing to obtain the composite solid waste-based cementing material. And stirring to obtain the composite solid waste-based cementing material. The synergistic effect of the alkaline activator and the sulfate activator is matched with the nucleation induction effect of the mineral modified admixture, so that hydration process synchronization of multiple solid waste components is realized, sulfate, Ca < 2 + > and an aluminum phase quickly generate ettringite, the mineral admixture is used as a crystal nucleus for growth of a hydration product, the hydration induction period is greatly shortened, and the hydration efficiency is improved. The early strength development rate of the material is increased, the later strength is continuously increased without shrinkage, and the engineering pain point of insufficient early strength or later strength stagnation of a traditional solid waste-based material is solved.

The invention relates to a novel phosphorus-fluorine curing agent for phosphogypsum and a preparation method thereof, and belongs to the technical field of industrial solid waste treatment and resource utilization. The curing agent comprises superfine slag powder, anhydrous sodium sulfate, water glass, water, sodium hydroxide and a Fe3O4 (at) SiO2 (at) Zr-Al bimetallic oxide stabilizer. The Fe3O4 (at) SiO2 (at) Zr-Al bimetallic oxide stabilizer is of a core-shell structure, magnetic ferroferric oxide particles serve as a core, and the surfaces of the magnetic ferroferric oxide particles are sequentially coated with an amorphous silicon dioxide protection layer and an active layer. And the active layer is an amorphous and porous zirconium-aluminum bimetallic oxide with a network structure. The preparation method of the curing agent is simple, mild in condition and easy for industrial production, the main raw material is the industrial solid waste slag, the effect of treating waste with waste is achieved, the agent addition amount is small, and the comprehensive treatment cost is low.

The application provides an anti-water freezing type gelling stable phosphogypsum asphalt concrete and a preparation method thereof, and comprises the following steps: 1, obtaining phosphogypsum powder by treating recycled waste phosphogypsum; 2, preparing PU / cement composite modified asphalt; 3, quantitatively taking PU / cement composite modified asphalt, natural aggregate and the phosphogypsum powder obtained in the step 1) (instead of mineral powder); 4, according to the designed mixing ratio, mixing the PU / cement composite modified asphalt, aggregate and phosphogypsum filler to prepare the anti-water / anti-freezing type phosphogypsum asphalt concrete. The composite modification of PU and cement can enhance the adhesion of asphalt to the natural aggregate and the phosphogypsum, significantly improve the water resistance and freezing resistance of the anti-water / anti-freezing type phosphogypsum asphalt concrete, greatly solve the problem that the potential practical engineering application of the phosphogypsum filler is limited due to the poor water stability, relieve the environmental pollution problem, and the production process is simple and easy to operate.