3215 results about "Gypsum" patented technology

The invention provides a self-leveling rapid repair mortar based on a steel slag solid waste cementing material and a preparation method thereof, the self-leveling rapid repair mortar comprises the following components in parts by mass: 100 parts of a self-leveling rapid repair mortar cementing material: 20-32 parts of steel slag powder, 20-30 parts of slag powder, 10-23 parts of raw ash, 10-15 parts of desulfurized gypsum, 5-8 parts of silica fume, and 8-25 parts of rapid hardening sulphoaluminate cement; the fine aggregate comprises 50 parts of quartz sand and 50 parts of steel slag aggregate; 0.3 to 0.7 part of a polyether defoaming agent, 0.05 to 0.25 part of lithium carbonate and 6 to 12 parts of a polycarboxylic acid water reducing agent; and 25-28 parts of water. According to the self-leveling rapid repair mortar based on the steel slag solid waste cementing material, on the basis of an alkali excitation synergistic sulfate excitation mechanism, the solid waste materials such as the steel slag powder, the slag powder, the raw ash and the desulfurized gypsum are utilized, and through proportioning optimization, the self-leveling rapid repair mortar which can open traffic within 2 hours and has the compressive strength gt within 28 days is prepared; the bonding strength is gt; the self-leveling mortar for rapidly repairing the cement concrete pavement has the advantages of self-leveling, no shrinkage of later strength and excellent durability.

Disclosed are a filling curing agent for preparing mine superfine tailing slag from solid waste residues, which belongs to the field of preparation of solid waste residues. The filling curing agent comprises a cementing material component obtained by means of a wet milling process while grinding, and an exciting agent component obtained by means of a mixing and stirring process; the cementing material component comprises, in parts by mass, 45-50 parts of blast furnace slag powder, 35-40 parts of steel slag powder, 15-20 parts of coal ash and 53.8 parts of water, and the exciting agent component comprises 100 parts of desulfurized gypsum powder and 59.5-60.6 parts of an activating agent; and the weight of the exciting agent component accounts for 10-15% of the weight of the filling curing agent. The filling curing agent disclosed in the present invention has low filling cost, high filling body strength and good durability, which reduces the occupation of land resources, reduces the impact on the ecological environment and residents' lives, realizes a virtuous cycle of mining and filling, and has good industrial prospects and social benefits.

The invention provides a concrete super-early-strength quick-hardening material, and relates to the field of building materials. The high-strength concrete comprises the following components in percentage by mass: 40%-50% of calcium aluminate, 30%-40% of gypsum, 8%-15% of high aluminum, 1%-3% of an additive, 3%-12% of an exciting agent and 1%-5% of an auxiliary material. According to the super-early-strength quick-hardening material provided by the invention, hour-level strength can be quickly and stably improved, and the strength increasing curve of each age is smooth and stable, so that the requirements of scenes such as road repair and tunnel construction on early strength can be met; it can be guaranteed that the 28-day compressive strength of the material breaks through 70 MPa, the later strength is kept stable, and the long-term safety of an engineering structure is guaranteed; the anti-seepage, anti-freezing and anti-erosion capabilities are realized in a complex environment, the service life of a project can be effectively prolonged, and the maintenance cost is reduced. In addition, the invention further provides a preparation method of the concrete super-early-strength and quick-hardening material, and the preparation method is used for preparing the super-early-strength and quick-hardening material provided by the invention.

The invention discloses a grinding device and method for fluorgypsum raw material processing, and relates to the technical field of gypsum raw material processing, the grinding device comprises a treatment box, and further comprises a pretreatment box fixedly connected to the top end in the treatment box, and the pretreatment box is internally provided with a crushing assembly for raw material pretreatment; the connecting disc is fixedly connected to the bottom of the pretreatment box, two through grooves used for communicating with the pretreatment box are formed in the connecting disc, the outer side of the connecting disc fixedly communicates with a circulating pipe, the two grinding mechanisms rotate to the position above the air blowing mechanism, and dust in the grinding mechanisms returns to the crushing frame again through the connecting disc and the circulating pipe to be treated; and the other two sets continue to grind the crushed raw materials, so that it is guaranteed that dust in the grinding mechanism is cleaned, it is avoided that powder between a grinding roller and a grinding cylinder continuously affects subsequent grinding, and efficient dust grinding is guaranteed.

A drywall anchor and a method for installing the drywall anchor. The drywall anchor includes a drilling element at the front end of a base body for the introduction into a gypsum plaster board in a self-drilling manner and a non-circular region having a cross-section including at least three corners at the outer contour thereof. In particular, the non-circular region forms a prism.

The invention belongs to the field of industrial waste gas treatment, and particularly relates to an industrial waste gas treatment device for preventing atmospheric pollution and an operation method thereof.The industrial waste gas treatment device comprises a shell, the top of the shell is fixedly connected with an air pump, the output end of the air pump is connected with an air exhaust pipeline, and one end of the air exhaust pipeline extends into the shell; according to the industrial waste gas treatment device for preventing atmospheric pollution and the operation method of the industrial waste gas treatment device, a closed loop is formed through the four nozzles to spray limestone slurry to gas flowing upwards, the gas enters the shell along the gas inlet groove and then flows downwards along the arc-shaped surface at the bottom of the guide ring, and the gas impacts on the limestone slurry in the first liquid accumulation cavity; sulfur dioxide in gas reacts with limestone slurry, gypsum and the limestone slurry are separated by controlling rotation of a containing plate, the containing plate drives a plurality of first spoilers to rotate while rotating, part of the gas is pushed to impact downwards, and the gas makes contact with the limestone slurry circulating along a flow blocking ring; therefore, the reaction time of the gas and the limestone slurry is prolonged.

The invention discloses a high-impermeability curing agent for sandy soil and a preparation method, the high-impermeability curing agent comprises the following components by mass: 30-50 parts of a solid waste-based sulfur aluminum iron series cementing material; 10 to 30 parts of slag powder; 5-30 parts of ordinary Portland cement; 5-20 parts of desulfurized gypsum; and 1-10 parts of silica fume. A curing agent system further strengthens the hydration effect and the cementing performance of the cementing material, and a formed crystal-colloid composite hydration product system contributes to the stable and compact microstructure of the cured sandy soil, so that the impermeability and the mechanical property of the sandy soil can be greatly improved; the comprehensive application of solid waste raw materials such as desulfurized gypsum and mineral powder is realized, and the stacking cost of solid wastes and the influence on the environment are reduced.

The invention discloses a coal gasification slag-based backfill material for replacing flow-state solidified soil, a preparation method and an application, utilizes a synergistic gelling effect among three raw materials, breaks through a material strength forming mechanism of traditional flow-state solidified soil, solves the problems of multiple components and high cost of a flow-state solidified soil material in the prior art, and has the advantages of low raw material cost, low raw material cost, low raw material cost, low raw material cost and the like. And the product popularization is facilitated. The specific scheme is as follows: the coal gasification slag-based backfill material for replacing the fluidized stabilized soil comprises coal gasification slag, carbide slag and titanium gypsum, the ratio of the coal gasification slag to the carbide slag to the titanium gypsum is 6-8: 1.5-3.5: 0.5-1.5, and an alkaline activator is also added; the coal gasification slag is a slag block with a set particle size formed after slag at the bottom of a gasification furnace is cooled, the carbide slag is waste slag which takes calcium oxide as a main component after acetylene gas is obtained by hydrolyzing calcium carbide, and under the action of an exciting agent, the coal gasification slag and the carbide slag are fully activated to release polyhedrons; part of the polyhedrons form a gelling product so as to improve the early strength of the coal gasification slag-based backfill material.

The invention provides a superfine light-weight high-strength filler and a preparation method thereof, and belongs to the technical field of fillers. The filler is prepared from the following components in parts by weight: 30 to 100 parts of quartz sand, 1 to 10 parts of cullet, 1 to 15 parts of Al2O3, 7 to 15 parts of Li2O, 2 to 8 parts of P2O5, 1 to 12 parts of ZrO2, 3 to 6 parts of composite nucleating agent, 5 to 10 parts of carbonate, 10 to 20 parts of feldspar and 2 to 5 parts of sulfate. The preparation method comprises the following steps: mixing the quartz sand, the cullet, the Al2O3, the Li2O, the P2O5, the ZrO2 and the composite nucleating agent, melting at a high temperature to obtain a base material, nucleating and crystallizing at different temperatures, grinding, adding the carbonate, the feldspar and the sulfate, adding the binder, granulating, and sintering to obtain the product. The lightweight high-strength filler has the characteristics of sound absorption, noise reduction, fire prevention, flame retardance, light mass density, high compressive strength, low water absorption, ecological environmental protection and the like, and is suitable for lime, gypsum and cement-based products; particularly, the high-temperature-resistant and high-strength dry-mixed mortar has a good application prospect in dry-mixed mortar products, such as ceramic tile adhesives, light plastering and self-leveling, as well as acoustic boards, sound insulation barriers, heat insulation boards and fireproof board products.

The invention relates to a bag-type dust collector of a gypsum powder production line, and relates to the technical field of gypsum powder production lines, the bag-type dust collector comprises a box body, an air inlet pipe, an air outlet pipe, a partition plate and a plurality of dust collecting bags, and further comprises a cleaning mechanism and a collecting mechanism, the cleaning mechanism comprises a moving block arranged on a first cavity in a sliding manner; the cleaning ring is used for brushing and cleaning the dust collecting cloth bag; the moving assembly is used for driving the moving block to move; the pulse blowing assembly is used for being started at intervals to blow and clean dust of the dust collecting bag; and the positioning assembly is arranged on the moving block and the cleaning ring and enables the cleaning ring to be connected with the partition plate and / or the moving block. According to the device, the dust collecting cloth bag is covered with the collecting mechanism and then cleaned, so that dust can be moved to the collecting position to be collected according to a designed path, the risk that the dust escapes everywhere is greatly reduced, the time spent on cleaning the dust collecting cloth bag is saved, and the flue gas purification efficiency is improved.

The invention provides a gel material, an industrial solid waste solidified immature soil material containing the gel material and a preparation method of the industrial solid waste solidified immature soil material, and belongs to the technical field of building materials.The industrial solid wastes such as desulfurized gypsum, carbide slag, slag powder and red mud are used for forming a full-solid-waste gel system, and the full-solid-waste gel system is mixed with immature soil, a water reducing agent and water; the high-flow-state and high-performance industrial solid waste solidified raw soil material suitable for pouring construction can be prepared on the premise of not additionally introducing an additive through a two-step method of ageing coating and stirring. The industrial solid waste solidified immature soil material has the advantages of being good in workability, high in mechanical property, good in durability, environmentally friendly, low in cost and simple in preparation process, use of the industrial solid waste solidified immature soil material in areas with relatively short resources and relatively backward economy is promoted, and the industrial solid waste solidified immature soil material can be used for treating engineering slurry and is applied to filling projects such as pipe galleries, temporary ground hardening and roads.

The invention relates to the technical field of desulfurization slurry treatment, and discloses a vacuum dehydration device and a dehydration treatment system and method for desulfurization gypsum. The device comprises a belt conveyor, filter cloth is arranged on the belt conveyor, a filter assisting component is arranged above the filter cloth, and the filter assisting component can extend into a filter cake layer on the filter cloth and damage a surface air blocking layer on the top of the filter cake layer. According to the technical scheme provided by the invention, the surface air barrier layer at the top of the filter cake layer is destroyed by the filter aid part, and the air pressure difference formed on the two sides of the filter cake layer due to suction filtration is recovered, so that free moisture in gypsum slurry is separated from the gypsum slurry under the dual effects of pushing force generated by the air pressure difference and self gravity; the desulfurized gypsum with relatively low water content is obtained.

A pretreatment mixing and stirring device includes a cylindrical housing having a top plate, a bottom plate arranged to oppose to the top plate, a side plate arranged between the top plate and the bottom plate, and a mixing and stirring region where a calcined gypsum and an additive are mixed and stirred in an interior surrounded by the top plate, the bottom plate, and the side plate, a disk-shaped rotating plate arranged inside the housing, a rotating drive shaft, penetrating the top or bottom plate, and coupled to the rotating plate, a calcined gypsum supply port, arranged in the top plate, and supplying the calcined gypsum to the mixing and stirring region, and an additive supply port, arranged in at least one of the top and side plates, and supplying the additive to the mixing and stirring region.

The invention belongs to the technical field of bottom plate mudstone treatment, and particularly relates to a rapid reinforcing material and method for bottom plate mudstone. The rapid reinforcing material for the bottom plate mudstone comprises the following components in parts by mass: a material A: 40-60 parts of sulphoaluminate cement, 15-40 parts of Portland cement and 1-2 parts of a naphthalene water reducer, and further comprises an initiator, a cross-linking agent and a redox agent; and a material B: 80-100 parts of gypsum, 10-30 parts of acrylamide and 2-4 parts of an aluminate coupling agent. According to the rapid reinforcing material for the bottom plate mudstone, the on-site argillization bottom plate can be hardened on site, a bottom plate hardening layer meeting the bearing condition is formed, the labor cost and the time cost caused by cleaning of bottom plate argillization substances are reduced, the passing smoothness is guaranteed, the project progress is accelerated, and the project benefits and the economic benefits are improved.

The invention relates to a method for improving early-stage performance of an all-solid-waste cementing material, and aims to improve the early-stage performance of the cementing material. At present, the early strength (1d strength) of an all-solid waste cementing material is generally low, but the characteristic is closely related to construction efficiency and is a key limit for large-scale application of the all-solid waste cementing material. Sintering is not included in the working procedures, and the product does not contain cement clinker. The method comprises the following steps: selecting industrial solid wastes such as steel slag, blast furnace water slag, iron alloy slag, silicomanganese slag, industrial byproduct gypsum, sintering fly ash, fly ash, calcined coal gangue and the like as raw materials; the industrial solid waste is subjected to independent or mixed grinding treatment; by optimizing the raw material ratio and introducing key component minerals, the specific surface area of the cementing material is increased, and active sites of the key minerals are dissociated and exposed. The mass of the introduced key components for optimizing the raw material ratio accounts for less than or equal to 15% of the total mass of the cementing material, the mass fraction of the key and active minerals is increased by less than or equal to 10%, and the early strength of the all-solid waste cementing material is increased by 30%.

The invention relates to the field of ardealite treatment, in particular to a compound preparation for curing fluorine and phosphorus in ardealite and application thereof.The compound preparation is prepared from, by mass, 20-40 parts of modified clay minerals, 10-15 parts of clay minerals, 1-2 parts of coagulant, 0.1-0.6 part of auxiliaries and 180-200 parts of deionized water. The modified clay minerals are hydroxyl iron modified mixed clay minerals, the mixed clay minerals are obtained by mixing maleic anhydride grafted clay minerals and polyacrylic acid-sodium acrylate grafted clay minerals, and the composite preparation provided by the invention can greatly increase the removal rate of fluorine and phosphorus in phosphogypsum; wherein the modified clay mineral and the clay mineral have a synergistic effect, a three-dimensional structure with large porosity, large specific surface area and large surface active group content can be formed in a system, phosphorus and fluorine in phosphogypsum can be adsorbed to the maximum extent, and the modified clay mineral and the clay mineral have a wide application prospect.

The invention belongs to the technical field of building material admixtures, and particularly relates to a difunctional gypsum admixture based on plant polyphenol-nano particles and a preparation method of the difunctional gypsum admixture. The preparation method comprises the following steps: adding plant polyphenol into a metal oxide nanoparticle dispersion liquid, adjusting the pH value, and filtering, washing and drying after reaction to obtain the difunctional gypsum admixture. The gypsum admixture provided by the invention can delay the setting time of gypsum and increase the plasticity time of gypsum slurry, after 10-50% of the admixture is introduced based on the mass of gypsum, the initial setting time of the gypsum is prolonged to 20-80 min, and meanwhile, efficient shielding of the gypsum to X-rays can be realized; meanwhile, the problem that metal oxide nanoparticles cannot be uniformly and stably loaded on gypsum crystals is solved.

The invention discloses a mechanical wall-cutting and filling mining method for gypsum ore. Aiming at the problems of difficulty in ventilation, high labor intensity, low production efficiency, poor surrounding rock stability and the like in a traditional wall cutting filling method, the method realizes safe and efficient mining of an extremely thin ore body through mechanical ore breaking, precise separation of a photoelectric ore separator and an in-situ immediate filling process of waste rocks. The method comprises the steps of ore block parameter design, mining preparation cutting, mechanical stoping, photoelectric mineral separation, barren rock in-situ filling and goaf ground pressure management, the stope structure and process can be dynamically adjusted according to the thickness and inclination angle of an ore body, and operation accuracy and safety are guaranteed through laser monitoring and supporting measures. According to the method, the mechanization level and mining and stoping efficiency of a gypsum mine mining process are remarkably improved, manual selection operation is reduced or even canceled, the labor intensity and cost of workers are reduced, the operation environment is improved, the stability of surrounding rock is improved, the method is suitable for mining of extremely thin ore bodies and other similar ore bodies under different conditions, and a foundation is laid for mine intelligent construction.

A fixing device for an article attaching member that makes it possible to fix with sufficient strength by easy work an article attaching member, to which a desired article or articles is / are attachable, to a fragile wall surface made of gypsum board or the like.In a state where a first engaging portion 13, a second engaging portion 14, and a third engaging portion 15 are contacted with a wall surface 50a, nails 20 inserted respectively through guide holes 13a, 14a, and 15a of the first, second, and third engaging portions 13, 14, and 15 are pushed into the wall surface 50a, thereby engaging these engaging portions 13, 14, and 15 with the wall surface 50a. The locations and pushing directions of the nails 20 inserted respectively through the guide holes 13a, 14a, and 15a are different from each other. An engaged portion 41 of an article attachment member 40 is inserted into a space S formed by an engaging wall 11 and a side wall 12, and the engaged portion 41 received in the space S is engaged with the engagement wall 11, thereby fixing the article attachment member 40 on the wall surface 50a at a desired position. The engaged portion 41 and the engagement wall 11 are connected together using a coupling means such as a wood screw 30, a nail or pin, a glue, an adhesive, a magnet, and the like.

The invention relates to the technical field of tunnel engineering safety prevention and control, and provides a gypsum rock tunnel water disaster risk evaluation and prevention and control scheme selection method which comprises the following steps: step 1-3, based on parameters such as rock mass structural integrity, stratum karst development degree, water yield property, groundwater corrosivity, gypsum rock mineral composition, expansibility and corrosion property, establishing a grading evaluation system, dividing corresponding grades and determining influence indexes R1-R8; 4, adopting an AHP method, an entropy weight method and a CRITIC method to perform multi-dimensional weight calculation on the subjectivity, objectivity and conflict influence indexes, correcting abnormal weights in combination with expert experience and verification rules, generating a comprehensive score, dividing risk grades, and matching graded prevention and control measures; and 5, optimizing and adjusting prevention and control measures in real time through a parameter risk level dynamic judgment and construction method matching mechanism. According to the method, multi-source parameter dynamic empowerment can be fused, and a full-life-cycle prevention and control method with accuracy, timeliness and self-adaptability is provided for tunnel engineering.

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.

The invention discloses a waste pipeline filling material, a preparation method and an application method, the waste pipeline filling material comprises a composite waste curing agent and mucky soft soil; the composite waste curing agent is formed by compounding dry powder and water; the dry powder comprises slag powder, carbide slag and desulfurized gypsum. The waste pipeline filling material disclosed by the invention is prepared by completely adopting the solid wastes, namely the slag powder, the carbide slag and the desulfurized gypsum as the curing agent to cure the sludge soft soil, has the advantages of wide raw material source, simplicity in preparation, high strength, low cost and the like, can fully recycle the solid wastes, and is low in energy consumption, low in emission and suitable for industrial production. And urban waste pipelines can be effectively filled, surface collapse accidents caused by structural damage of the urban waste pipelines are avoided, and positive significance is achieved for the ecological environment and urban development.

The invention discloses a mineral powder-red mud-desulfurized gypsum-based multi-source solid waste road grouting material as well as a preparation method and application thereof, and belongs to the technical field of solid waste utilization and road grouting reinforcement. The mineral powder-red mud-desulfurized gypsum-based multi-source solid waste road grouting material comprises a multi-source solid waste aggregate and 0.01-0.015 wt% of a water reducing agent mixed in the multi-source solid waste aggregate, wherein the multi-source solid waste aggregate is prepared from the following raw materials in percentage by weight: 40.5-43.5 wt% of red mud, 40.5-43.5 wt% of quick-hardening sulphoaluminate cement, 9-10 wt% of mineral powder and 3-10 wt% of desulfurized gypsum; the mass ratio of the red mud to the quick-hardening sulphoaluminate cement is 1: 1. The mineral powder-red mud-desulfurized gypsum-based multi-source solid waste road grouting material can be hydrated to generate spar with a supporting effect, so that the grouting material has high stone strength in an early stage and high stone strength stability in a later stage, and generated spar particles can interact with a water reducing agent; and meanwhile, the problem of stockpiling of contained solid wastes is effectively solved, and the preparation cost is greatly reduced.

The present invention relates to the technical field of comprehensive utilization of industrial solid waste, specifically a graphite tailings-saw mud road subbase material and its preparation method and application, including the following components in parts by weight: 40-55 parts of graphite tailings, 45-60 parts of saw mud, 0.5-2 parts of phase change microcapsules, 5-10 parts of slaked lime, 10-20 parts of fly ash, 0.5-1.5 parts of titanium gypsum, 0.5-2 parts of steel slag powder, 5-15 parts of water and 0.05-0.2 parts of dispersant; the 7d unconfined compressive strength range of the graphite tailings-saw mud road subbase material is 2.64-3.87MPa, and the compressive strength loss rate (BDR) range is 82.1%-86.2%. By using titanium gypsum and steel slag powder, a gelling material with micro-expansion properties, to solidify the graphite tailings-saw mud, the shrinkage and temperature shrinkage properties of the subbase material are optimized, and the antifreeze ability of the subbase material is improved by adding phase change microcapsules.

The invention relates to the technical field of filling materials, and discloses a barium-slag-based all-solid-waste filling material and a preparation method thereof.The preparation method comprises the steps that barium slag is dried, smashed and then screened; drying the mushroom dregs at low temperature, and crushing until the particle size is less than 200 mu m; soaking the desulfurized gypsum in a 2% surfactant solution for 30 minutes, draining, and calcining at 150 DEG C for 2 hours; the method comprises the following steps: crushing waste glass until the particle size is 10-30 microns, magnetically separating to remove iron impurities, pickling to remove organic matters, and drying; heating the steel slag to 800 DEG C after water quenching, keeping the temperature for 2 hours, and crushing; mixing the barium slag, the mushroom dregs, the desulfurized gypsum, the ceramic waste powder, the glass powder and the steel slag according to a mass ratio; adding water and a toughening agent to obtain mixed slurry; and adding bacillus subtilis, stirring, adjusting the pH value to 8-9, and standing for 6-12 hours to finally obtain the barium slag-based all-solid waste filling material. Solid waste resources are utilized, the problem of solid waste treatment is solved, and meanwhile the filling material has good mechanical strength.

A drywall anchor to be introduced into a gypsum plaster board in a self-drilling manner, and to a method for installing the drywall anchor. The drywall anchor comprises a base body and a drilling element. The drilling element comprises a drilling tip and a cutting element including a cutting bit as well as a hollow, crucible-shaped core bit, which is open toward the front and within which the cutting element is disposed, the cutting element protruding to the front beyond the bit.

The invention relates to the technical field of solid waste resource utilization, in particular to a high-strength light solid waste-based multi-shell concrete functional aggregate and a preparation method thereof. The concrete functional aggregate has a three-layer spherical structure, and an internal core layer is a porous layer, provides partial strength and keeps low density; the middle layer is a strength layer and is responsible for cooperating with the core layer to provide higher strength; and the outer shell layer is a functional layer and mainly realizes slow release, temperature regulation and other properties of the aggregate. According to the invention, a traditional sintering process is abandoned, comprehensive utilization of solid wastes such as fly ash, gypsum, slag and the like is realized, and the technical problems of high density, low strength, high water absorption rate and poor interface adhesion performance with other materials of the existing sintering-free artificial aggregate can be effectively solved.

The invention relates to the technical field of building materials, in particular to a cementing material for a fabricated wall prepared from multi-element solid waste and a preparation method of the cementing material. The preparation method comprises the following steps: 25-55 parts of fly ash, 25-65 parts of blast furnace slag, 8-10 parts of lime, 1-5 parts of desulfurized gypsum, 3-6 parts of a first mixture, 2-5 parts of a second mixture and 5-8 parts of an alkali activator; the mass ratio of the metakaolin to the bentonite to the superfine calcium carbonate in the first mixture is 3: 2: 1; the mass ratio of the vermiculite to the expanded perlite to the glass beads in the second mixture is 2: 2: 1. Through the synergistic excitation effect of Ca < 2 + > and Na < + > and the addition of the first mixture and the second mixture, the cementing material forms a more stable microstructure. A hydration product SEM figure shows that C-S-H and C (N)-A-S-H gel are symbiotic to form a three-dimensional network, pores are filled with needle-like ettringite crystals, and in combination with the brucite phase anchoring effect, the mechanical properties, such as strength and durability, of the material are remarkably improved.

The invention discloses an all-solid waste cementing material and a preparation method thereof, and belongs to the technical field of building materials. The all-solid waste cementing material comprises the following components in parts by mass: 30-45 parts of steel slag, 20-30 parts of mineral slag, 10-20 parts of red mud, 20-25 parts of carbide slag, 10-20 parts of fly ash, 5-10 parts of an interface regulator and 5-20 parts of gypsum. According to the invention, various industrial solid wastes such as the steel slag, the red mud, the carbide slag, the fly ash, the mineral slag and the gypsum are fully utilized as raw materials, so that cyclic utilization of resources is realized, the solid wastes can generate hydration products, form a firm network structure and provide strength, harmless treatment and resource utilization of the solid wastes are realized, and the cement can be used as a substitute material of cement. The method has good economic and environmental benefits, achieves the purpose of carbon reduction in the field of cementing materials, and meets the current industrial development requirements of energy conservation, environmental protection and circular economy.

The utility model discloses a gypsum board cutter structure which comprises a shaft rod, a cutter blade is movably installed on the outer wall of the shaft rod, a dust collection cover is movably installed on the outer wall of the shaft rod, the dust collection cover forms a semi-surrounding structure around the shaft rod and the outer wall of the cutter blade, and the dust collection cover is provided with a collection port with the cutter blade as the center. And the lower surface of the dust collection cover movably abuts against the board surface of the gypsum board to enclose the collection port to form a closed structure. A semi-enclosed dust collection structure is formed in a movable connection mode, duckbilled collection structures are formed on the two sides of the cutter, and the dust collection cover is always attached to the board face along with the cutting depth, so that the dust collection cover abuts against the board face to form a closed structure when the cutter cuts the gypsum board, splashing of chippings can be reduced, and the cutting efficiency is improved. Chippings can be conveniently controlled and collected in the dust collecting cover, the chippings can be conveniently and intensively cleaned, and the problem that the quality of the board surface is affected by tiny residues caused by the chippings remaining on the board surface of the gypsum board is solved.