853 results about "Foam concrete" patented technology

The invention discloses a fiber foamed concrete and a preparation method thereof. The fiber foamed concrete comprises the following raw materials in parts by weight: 5290 parts of cement, 4965 parts of water, 1.361 part of foaming solution, 1.2964 part of fly ash and 10 parts of fiber. The preparation method comprises the following steps: proportionally weighing the components; sequentially adding the cement and fly ash into a stirrer, proportionally weighing the water, uniformly stirring the mixture by the stirrer, and adding the fiber; preparing and adding the foaming solution; gradually adding the foam into the mixture, and continuously stirring until all the components are uniformly mixed; pouring the mixture into a mold on which lubricating oil is brushed, and curing in a curing chamber; after 24 hours, removing the mold; and respectively curing for 3 days, 7 days and 28 days for experimental detection. The fiber foamed concrete has the advantages of favorable thermal insulation property, favorable compression resistance and favorable bending resistance, and is applicable to a railway bed strengthening layer.

The invention discloses a foam concrete image processing method based on sub-pixel edge reconstruction, and particularly relates to the field of foam concrete image processing.The method comprises the steps that an image of foam concrete is obtained, and a boundary response feature set containing edge direction information, edge gradient change information and local intensity comparison information is extracted; performing edge structure classification on the image region based on boundary response feature set combined threshold judgment; and aiming at the image region which is judged to be the local direction convergence mutation region, identifying a cross mutation point set by fitting a direction tensor convergence trend, and executing directionally-guided corrosion and expansion image processing. By constructing a structure judgment variable based on image boundary response characteristics and guiding a corrosion expansion path and a vein backtracking path to execute sub-pixel-level aperture boundary separation, image structure processing and contour reconstruction of a porous adhesion area are realized.

The invention discloses efficient sound-absorbing lightweight aggregate foam concrete as well as a preparation method and application thereof, and belongs to the field of inorganic non-metallic materials. The high-efficiency sound-absorbing lightweight aggregate foam concrete is prepared from the following components in parts by weight: 85 to 95 parts of a sulfur-aluminum-iron series low-carbon cementing material, 5 to 15 parts of an auxiliary cementing material, 0.6 to 1.5 parts of a functional additive, 20 to 60 parts of unfired lightweight aggregate, 0.35 to 0.45 part of water and 0.5 to 1.5 L of prefabricated foam, the baking-free lightweight aggregate comprises the following components in parts by weight: 40-50 parts of a sulfur-aluminum-iron series low-carbon cementing material, 50-60 parts of byproduct gypsum, 0.7-1.5 parts of a chemical foaming agent, 15-22 parts of water and 5-8 parts of expanded perlite. According to the invention, a multi-stage-multi-scale pore structure body with expanded perlite pores, hydrogen peroxide foaming pores and physical foaming pores is constructed, so that the balanced broadband sound absorption performance of the material is realized, the sound absorption frequency range is adjustable, the sound absorption and noise reduction coefficient (NRC) of the material is greater than or equal to 0.80, the volume weight is less than or equal to 500 kg / m < 3 >, and the breaking strength is greater than or equal to 1.5 MPa.

The invention discloses a multi-source data fusion foam concrete construction process monitoring method and system, and relates to the technical field of concrete construction, the method comprises the following steps: obtaining a standard response data set of foam concrete, including raw material ratio parameters and performance index parameters which are stored in an associated manner; constructing and training a hybrid hierarchical performance prediction model, wherein the model comprises a shared prediction layer based on integrated learning and a plurality of independent output layers connected with the shared prediction layer; in combination with a multi-objective optimization algorithm, by taking compressive strength and cost optimization as an objective, constructing an evaluation function for global optimization, and obtaining a target mix proportion scheme; acquiring real-time process data associated with the target mix proportion scheme, and inputting the real-time process data into the mixing layering performance prediction model to obtain a prediction result; and comparing with a preset design target, and generating an adjustment instruction for adjusting the matching parameters of the subsequent stirring batches. The problem that in the prior art, the performance fluctuation of foam concrete of different batches is large due to the fact that the construction condition cannot be dynamically adjusted in real time is solved.

The invention relates to the technical field of concrete, and particularly discloses ultralow-density foam concrete and a preparation method thereof. The ultralow-density foam concrete is prepared from the following raw materials in parts by weight: 35 to 60 parts of cement, 15 to 25 parts of steel slag, 8 to 15 parts of lightweight aggregate, 1 to 3 parts of reinforced fiber, 0.5 to 1 part of a foaming agent, 0.1 to 0.3 part of a stabilizer, 0.3 to 0.5 part of a foaming aid and 30 to 70 parts of water, the foaming aid is at least one of aluminum powder, silica fume, calcium stearate and triethanolamine, and the foaming agent is one of an animal protein foaming agent and a rosin foaming agent; the foaming agent and the foaming aid are combined, a stable foam structure is formed in a concrete system, meanwhile, the phenomena of foam merging and foam breaking are reduced, formation of communicating holes is reduced while the foam hole structure is refined, the stability of foam concrete bubbles is improved, and foam collapse is reduced.

The invention belongs to the field of green low-zero-carbon building materials, and provides a CO2 foam concrete material based on a solid waste-based multi-component gel system and a preparation method thereof, the CO2 foam concrete material comprises the following components by mass: 20%-42% of solid waste-based sulphoaluminate cement, 15%-60% of semi-hydrated gypsum, 6%-15% of Portland cement, 0-20% of mineral powder, and 2%-4% of sodium bicarbonate, the concrete admixture comprises the following raw materials in percentage by weight: 3%-6% of aluminum potassium sulfate, 0.2%-0.4% of a retarder, 0.02%-0.2% of a water reducing agent and 0.02%-0.06% of calcium stearate, and the sum of the percentages of all the raw materials is 100%. On the basis of ensuring that the foam concrete meets the strength requirement, the apparent density is obviously reduced; the compound system formed by the solid waste-based sulphoaluminate cement, the Portland cement and the semi-hydrated gypsum obviously improves the mechanical property of the carbon dioxide foam concrete and greatly improves the mechanical property of the carbon dioxide foam concrete.

The invention discloses a coal gangue-based lightweight concrete material as well as a preparation method and application thereof, and belongs to the technical field of building materials. The coal gangue-based lightweight concrete material is prepared by the following method: mixing cement, coal gangue, fly ash, silica fume, an anti-crack water reducer, a reinforcing component and water to prepare cement slurry; adding water to dilute the composite foaming agent, and preparing foam with a uniform structure through a compressed air foaming machine; and adding foam into the cement slurry, uniformly stirring and mixing, pouring into a mold, and curing to obtain the coal gangue-based lightweight concrete material. The stability of foam concrete bubbles in slurry is improved, the cement-coal gangue-bubble interface bonding force is improved, and the pressure intensity, pore distribution, contractibility, water absorption and other performance of the coal gangue foam concrete are improved.

The invention discloses thermal insulation concrete and a preparation method thereof, and relates to the technical field of lightweight concrete. The preparation method comprises the following steps: firstly, depositing a carbon nano tube through a plasma enhanced chemical vapor deposition method, and optimizing the adhesive force of the carbon nano tube on the surface of basalt fiber; meanwhile, spraying citric acid is introduced and then reacts with urea to generate carbon quantum dots in high-temperature microwaves to form an uneven interface, particles are tightly combined and are not prone to falling off, the heat transfer efficiency is improved, and the heat preservation performance and the mechanical performance are improved; secondly, by utilizing the hydrophobicity of the modified nano silicon dioxide, the foam size is refined, and pores and nodes in a foam concrete net structure are filled; then, the modified basalt fibers, phenolic resin and a foam concrete system are compounded to form a three-dimensional structure, pores are filled, communicating pores before and after hardening are reduced, and the thermal insulation performance and the mechanical performance of foam concrete are both considered. The foam concrete prepared by the invention has the effects of heat preservation, heat insulation and high mechanical property.

The invention discloses a CO2 inflation foaming preparation method of a ternary solid waste foam cement thermal insulation material, which comprises the following steps: step 1, weighing desulfurized gypsum, fly ash, mineral powder and an additive, and uniformly stirring for later use; step 2, weighing water with required weight, and uniformly stirring the uniformly mixed dry material and water to form uniform slurry; step 3, stirring the uniform slurry at a high speed, and filling CO2 gas while stirring, so as to prepare inflatable foaming slurry; step 4, pouring the inflatable foaming slurry into a mold, weighing a sample, loading the sample into a self-sealing bag, sealing, and curing in a natural environment; and step 5, after curing to the age, taking out the sample, and drying to constant weight to prepare the ternary solid waste foam cement thermal insulation material. The ternary solid waste foamed cement thermal insulation material which takes CO2 as foaming gas, the desulfurized gypsum as a main cementing material and the fly ash and the mineral powder as auxiliary cementing materials is prepared, and meets the A08 grade requirement specified by the standard of foam concrete.

The invention discloses a foam concrete nano foaming agent and application thereof, and belongs to the technical field of concrete materials. The foam concrete nano foaming agent is composed of the following components in percentage by mass: 10-50% of cellulose; 10%-50% of a water-soluble polymer material; 5%-30% of a surfactant; and 5%-30% of nanoparticles. The foam concrete nano foaming agent provided by the invention has the advantages of low cost and good foaming effect. Nano foam generated by foaming of the foaming agent is high in stability, and when the foaming agent is applied to preparation of a foam concrete material, the foam concrete is wide in dry density range and low in collapse rate, has good mechanical properties, flowing properties, dry shrinkage properties, stability and heat insulation properties, and is wide in application prospect. The method is suitable for the fields of building materials, housing construction, road and bridge engineering, cast-in-place backfill engineering, pit goaf backfill, garbage burying and the like.

The invention provides a high and steep slope reinforcing system with a slope crest adjacent to a post-built municipal pipe gallery and a construction method of the high and steep slope reinforcing system. The reinforcing system comprises an original side slope lattice anchor supporting structure, a pipe gallery structure, a foam concrete backfill structure located on the side, close to the original side slope surface, of the pipe gallery structure, a row of newly-added anchor rods / cables constructed below the first row of original anchor rods / cables below the slope top, and a row of miniature steel pipe piles constructed below the outer side, close to the side slope surface, of the pipe gallery structure. A first row of anchor rods (cables) of an original removed side slope support are replaced by newly added anchor rods or anchor cables, and the whole steel pipe piles are located in the foam concrete to form a miniature pile retaining wall structure. The overall stability of the high and steep slope with the slope crest adjacent to the pipe gallery is greatly improved, and displacement of the slope crest adjacent to the pipe gallery is effectively controlled; the settlement of the slope crest adjacent to the pipe gallery is effectively controlled in a design and standard range; meanwhile, the foam concrete structure is used for filling the pipe ditch (groove), so that filling pressure can be reduced, and compactness and strength are guaranteed.

The invention relates to solid waste-based self-excitation foam concrete which is characterized by comprising the following raw materials in parts by mass: 1-2 parts of a composite foaming agent, 40-60 parts of a composite precursor, 40-60 parts of an alkaline excitation material, 0.1-0.2 part of polypropylene fiber and water, and the mass ratio of water to glue is 0.45-0.55. The mineral activity of the waste incineration bottom slag, the fly ash and the granulated blast furnace slag powder is excited through the solid waste-based alkaline exciting agent, the compressive strength of the material is remarkably improved by adding the polypropylene fiber, the dry density and the heat conductivity coefficient meet expected requirements, the cost is saved, energy is saved, the environment is protected, and a new direction is provided for recycling application of industrial solid waste.

The invention discloses a UHPC-foam concrete composite material with a sandwich structure and a preparation method of the UHPC-foam concrete composite material. The composite material comprises two ultra-high performance concrete (UHPC) panel layers, a foam concrete sandwich layer of a negative Poisson's ratio three-dimensional framework prepared through a photocuring three-dimensional printing technology is arranged between the two ultra-high performance concrete (UHPC) panel layers, and the three-dimensional framework is of an inward-concave honeycomb topological structure and has the characteristic of transverse expansion after being pressed; impact stress can be effectively dispersed, and a dual energy dissipation path is formed through a synergistic effect with a porous energy absorption mechanism of the foam concrete. The panel layer and the sandwich layer are combined through a layered pouring process, and an interface is subjected to scabbling treatment so as to enhance the bonding strength. The composite material is superior to a traditional material in the aspects of compressive strength and energy absorption performance, is suitable for the fields of anti-explosion buildings, military protection engineering, frontier defense facilities and the like, and has a wide application prospect.

The invention relates to a foam concrete light-weight embankment capable of alternately maintaining traffic by lifting a longitudinal slope during reconstruction and expansion of a road, which adopts foam concrete to construct and expand the embankment and to lift the embankment by the longitudinal slope, so that the dead weight of the embankment is reduced, the settlement amount of a new roadbed is reduced, the differential settlement between the new roadbed and the old roadbed is reduced, and the later maintenance cost is reduced; during foam concrete construction, a plurality of reinforcing mesh anchoring measures are set layer by layer, so that the stability of the reinforcing meshes in the foam concrete pouring process is improved, and the construction quality of the light embankment is further improved; the new roadbed and the old roadbed are anchored through the reinforcing mesh hanging type supports, the Z-shaped supports and the claw-shaped supports, and the integrity between the original roadbed and the widened longitudinal slope lifting embankment is improved.

The invention discloses a profiled steel sheet light steel skeleton foam concrete composite floor slab and a mounting method thereof. The composite floor slab comprises a light steel skeleton, and alkali-resisting gridding cloth is arranged on the bottom face of the light steel skeleton; a steel wire mesh is arranged on the bottom surface of the alkali-resistant gridding cloth, and a profiled steel sheet is arranged on the top surface of the light steel framework; the steel wire mesh is welded with the light steel framework, and the profiled steel sheet is fixedly connected with the light steel framework; foam concrete is filled between the steel wire mesh and the profiled steel sheet. According to the profiled steel sheet light steel framework foam concrete composite floor slab and the mounting method thereof, the problems that in the prior art, a foam concrete floor slab is prone to cracking, poor in waterproof effect, difficult in wiring and the like are solved, and the purposes that the cracking risk of the foam concrete floor slab is reduced, meanwhile, the waterproof performance is improved, and various pipelines can be arranged conveniently are achieved.

A phase-change heat-storage foamed concrete, and a preparation method and use thereof are provided. The phase-change heat-storage foamed concrete provided by the present disclosure is prepared from raw materials including, in percentages by mass: 50-70% of a cement, 2-20% of a supported phase-change material, 15-35% of water, 0.1-0.5% of a water-reducing agent, 0.5-1.5% of a foam stabilizing agent, 0.5-2% of an aqueous hydrogen peroxide solution, and 0.1-0.4% of a hydrogen peroxide decomposition catalyst. The supported phase-change material includes an acid-modified fly ash and a paraffin supported on a surface and in a pore structure of the acid-modified fly ash, and the aqueous hydrogen peroxide solution has a mass percentage concentration of 25-30%.

The invention provides a fire coal bottom ash-based low-shrinkage foam concrete material based on fluidity control as well as a preparation method and application of the fire coal bottom ash-based low-shrinkage foam concrete material. According to the invention, the proportioning water consumption under different coal-fired bottom ash mixing amounts is accurately calculated through a water consumption calculation formula, and the foam concrete material is prepared by combining aggregate grain composition regulation and control. The foam concrete material provided by the invention not only has the characteristics of low drying shrinkage, sound absorption, heat insulation, light weight, high strength, low cost, wide application range and the like, but also fully utilizes bulk solid wastes such as coal-fired bottom ash and the like, and adopts the coal-fired bottom ash to replace sand aggregate, so that the use amount of sand is greatly reduced, the exploitation of natural resources is reduced, the construction cost is reduced, and the environmental pollution is reduced. And the economic value is improved.

The light steel framework foam concrete composite floor slab comprises a light steel framework, at least two layers of alkali-resisting gridding cloth are arranged on the bottom face of the light steel framework, and grids of every two adjacent layers of alkali-resisting gridding cloth are arranged in a staggered mode; a first steel wire mesh is arranged on the bottom surface of the alkali-resistant gridding cloth on the lowermost layer, and a second steel wire mesh is arranged on the top surface of the light steel framework; the first steel wire mesh and the second steel wire mesh are welded with the light steel framework; foam concrete is filled between the first steel wire mesh and the second steel wire mesh. The light steel framework foam concrete composite floor slab provided by the invention solves the problem that a foam concrete floor slab in the prior art is easy to crack, and achieves the purposes of reducing the cracking risk of the foam concrete floor slab, improving the use stability and reducing the later maintenance difficulty.

The invention provides a foam concrete slope crest reconstruction and extension structure in a landslide field area and a construction method thereof. The slope crest reconstruction and extension structure comprises a slope surface protection structure constructed after grading sloping of a slope surface of an original slope, a row of anti-slide piles constructed on a grading sloping slope surface platform of the original slope, a row of beam top stand columns fixed above pile top connecting beams of the anti-slide piles, and a row of anchoring piles constructed in the original slope and close to a building. An inter-stand-column breast board is arranged between every two adjacent beam top stand columns, foam concrete structures are filled between the inter-stand-column breast boards and the graded sloping net hanging concrete spraying structures, and a plurality of sets of horizontal opposite-pulling anchor cables are connected between the beam top stand columns and the anchor pile top connecting beams. The overall stability of the reconstruction and extension site landslide is greatly improved, and slope crest displacement is effectively controlled; the surface subsidence of the slope top behind the anchoring pile is effectively controlled within a design and standard range; meanwhile, the foam concrete structure is used for filling the roadbed, so that filling pressure can be relieved, and compactness and strength are guaranteed.

The invention discloses low-carbon red-mud-based alkali-activated foam concrete and a preparation method thereof, and belongs to the field of low-carbon foam concrete. Specifically, the mix proportion and the preparation method of the low-carbon red-mud-based alkali-activated foam concrete are as follows: P.O42.5 ordinary Portland cement provided by building materials in Qingdao Weidong macro, the I-grade fly ash is S95-grade granulated blast-furnace slag produced by Henan Province Platinon Casting Material Co., Ltd., and Jinshu New Material Co., Ltd., the I-grade fly ash is S95-grade granulated blast-furnace slag produced by Henan Province Platinon Casting Material Co., Ltd. The Bayer process red mud powder is produced by Hebei Province Shihozhuangfei Mine Product Co., Ltd. The exciting agent is selected from an industrial liquid sodium silicate solution produced by Henan Jinmoistening New Material Co., Ltd. And solid sodium hydroxide particles with AR analytical purity of 96%; the admixture is selected from a TR-26C type polycarboxylate superplasticizer produced by Henan Fuhua Information Science and Technology Co., Ltd. And the foaming agent is a TR-E type animal protein foaming agent produced by Henan Zhuichun Information Science and Technology Co., Ltd. Compared with existing foam concrete, the low-carbon alkali-activated foam concrete provided by the invention uses a large amount of industrial solid waste, reduces the use cost, reduces the use amount of cement under the condition of ensuring the compressive strength, and is simple and convenient to operate, reasonable in process, low-carbon, environment-friendly, rapid in cement setting and hardening, and suitable for large-scale use.

The invention discloses coal gasification slag-based self-foaming lightweight concrete and a preparation method thereof, and relates to the field of comprehensive utilization of lightweight foam concrete and solid wastes. The coal gasification slag-based self-foaming lightweight concrete is prepared from the following components in parts by weight: 50 to 60 parts of coal gasification fine slag, 20 to 30 parts of waste incineration bottom ash, 10 to 30 parts of composite admixture, 5 to 20 parts of composite exciting agent, 20 to 40 parts of fine aggregate, 40 to 60 parts of water, 0.3 to 0.5 part of sodium lactate, 0.3 to 0.5 part of water reducing agent, 0.3 to 0.7 part of cellulose ether and 0.3 to 0.5 part of redispersible latex powder. The invention has the advantages of low manufacturing cost, small environmental pollution, simple process flow, multiple curing modes and excellent performance in various aspects, can replace the traditional foam concrete, can effectively reduce the use of cement-based cementing materials, and promotes the recycling and large-scale utilization of solid waste materials.

The invention belongs to the technical field of fluid curing. The liquid-state light-weight anti-seepage solidified soil is characterized by comprising flow-state solidified soil slurry and light-weight foamed concrete, the volume ratio of the flow-state solidified soil slurry to the light foamed concrete is 1: 1; the flow-state solidified soil slurry comprises a soil material, a curing agent and water, and the weight ratio of the soil material to the curing agent to the water is 1150: 80: 228; the light foamed concrete comprises water, cement and a foaming agent; the weight ratio of the water to the cement to the foaming agent is 150: 250: 2.24. The technical problem that backfill soil around an existing building foundation collapses is solved. The invention further discloses a preparation method of the liquid light anti-permeability solidified soil. The invention further discloses a construction method of the liquid light anti-permeability solidified soil.

The invention discloses thermal insulation foamed concrete block processing equipment based on metallurgical solid waste recovery and utilization and a processing technology thereof, and relates to the technical field of foamed concrete production, the thermal insulation foamed concrete block processing equipment comprises a rack, a stirring tank is arranged at the top of the rack, and a stirring shaft is mounted at the axis of the stirring tank. According to the thermal insulation foamed concrete block processing equipment based on metallurgical solid waste recovery and utilization and the processing technology thereof, the stirring rod, the semicircular tank, the first rod and the recovery opening are arranged, the stirring rod mixes ingredients in the horizontal direction, and the semicircular tank drives the ingredients at the bottom to move, so that the ingredients at different layers in the vertical direction are mutually mixed; the mixing uniformity of ingredients and the uniform distribution of air holes are facilitated; the first rod moves left and right along the top surface of the shaping container, so that the foamed concrete in the middle is pushed to the two sides, the foamed concrete is also compacted and flattened, and the number of capillary channels and the probability of cracks are reduced; and redundant foamed concrete is pushed to the collecting tank and slides to the recycling opening, so that the production cost of the foamed concrete is reduced.

The invention provides a foam concrete mechanical property prediction model optimization method considering economy, which comprises the following steps of: establishing a three-dimensional mesoscopic finite element model of foam concrete, then selecting material parameters and external loading condition parameters to carry out regularity analysis, and taking the parameters with relatively high influence factors as deep learning input variables; and then, a combined neural network combining a convolutional neural network (CNN) and a bidirectional gating cycle unit (BiGRU) is adopted as a prediction model, a data sample is obtained through reliable numerical model analysis, and accurate prediction of the mechanical properties of the foam concrete is realized based on the CNN-BiGRU. And finally, according to the deep learning model, setting an objective function of the compressive strength and the energy absorption capacity of the foam concrete, solving the optimal design characteristics of the foam concrete in the aspects of the compressive strength and the energy absorption capacity, and obtaining an optimal performance design scheme of the foam concrete.

The invention relates to the technical field of building materials, in particular to alkali-activated bentonite slurry and steel slag foam concrete and a preparation method thereof. The alkali-activated bentonite slurry steel slag foam concrete is prepared from the following raw materials in parts by mass: 400 to 440 parts of cement, 25 to 60 parts of expansive soil slurry, 55 to 60 parts of mineral powder, 25 to 30 parts of steel slag powder, 0.8 to 1 part of alkali, 25 to 30 parts of manganese tailings, 260 to 265 parts of water and 30 to 32 parts of foam. The manganese tailings, the steel slag powder and the mineral powder belong to bulk industrial solid wastes, and the bulk industrial solid wastes of the prepared foam concrete account for 25-30%, so that the cement consumption is saved, and the cost is further saved.

The invention discloses a fly ash lightweight concrete material and a preparation method thereof, and belongs to the technical field of lightweight concrete materials. The concrete is prepared from the following raw materials in parts by weight: 75 to 90 parts of activated fly ash system, 15 to 20 parts of gel material, 13 to 20 parts of lightweight aggregate, 0.85 to 2.4 parts of foaming system and 0.75 to 1.6 parts of functional additive. The fly ash is effectively activated, so that the overall performance of the foam concrete is integrally improved, more importantly, the fly ash is used as industrial waste in the light foam concrete, resource recycling is achieved, dependence on natural resources is reduced, the cost of raw materials is reduced, and the utilization rate of the fly ash in the light foam concrete is increased. Carbon dioxide emission in the cement production process can be reduced, so that energy conservation and emission reduction are realized.

The utility model discloses a premixed slurry super high-rise foam concrete production device, which relates to the technical field of foam concrete production, and comprises a stirrer, a screw pump, a foam pump, foaming equipment, a foam concrete pump and a mixer, the screw pump is connected with the stirrer to convey slurry, the foaming equipment is connected with the foam pump to pump foam, the mixer is connected with the screw pump and the foam pump to mix the foam and the slurry to prepare foam concrete, and the foam concrete pump is connected with the mixer to convey the foam concrete to a high-rise area to be poured; according to the utility model, the measurement and control equipment is arranged on the hose, so that various performance indexes of slurry, foam and foam concrete can be monitored; a dilution multiple display is arranged, so that the foam stability is improved; and the slurry and the foam are uniformly dispersed and fully mixed by adopting a mixer. The problem that the quality is unstable when foam concrete is pumped to a super high-rise building for construction is solved.

The utility model provides a tunnel inverted arch structure which comprises a corrugated steel plate layer, a secondary lining layer, a frame column layer and a pavement layer which are sequentially arranged from bottom to top, and the corrugated steel plate layer is provided with a grouting hole and an anchor rod hole for a system anchor rod to penetrate through. Foam concrete is injected into an interlayer space between the corrugated steel plate layer and the surrounding rock through the grouting holes to form a foam concrete layer, the system anchor rod comprises an anchoring end and a locking end which are oppositely arranged in the extending direction of the system anchor rod, the anchoring end penetrates through the anchor rod hole to be anchored into the surrounding rock, and the locking end is connected with the corrugated steel plate layer. The secondary lining layer is arranged on the inner wall of the corrugated steel plate layer, the bottom of the frame column layer is pre-buried in the secondary lining layer, and the pavement layer is laid on the top of the frame column layer. According to the novel inverted arch structure, particularly, a traditional inverted arch backfilling layer is arranged to be of a frame layer structure, the use amount of concrete can be greatly reduced, the safety and stability of a tunnel are guaranteed, meanwhile, the material cost and the construction cost are reduced, and economic benefits are improved.

A preparation method of multi-component mixed gas foam concrete belongs to the technical field of concrete.The preparation method comprises the following steps: preparing a nanoparticle modified foaming liquid: adding a surfactant into water, uniformly stirring to obtain a surfactant solution, adding nanoparticles into the surfactant solution, and stirring with a magnetic stirrer to obtain the nanoparticle modified foaming liquid; then adding a foam stabilizer and uniformly stirring to obtain a modified foaming solution; starting a foaming machine, and introducing foaming liquid to generate stable mixed gas foam of carbon dioxide and nitrogen; stirring the cement and the water to obtain uniform cement paste; adding the prepared mixed gas foam into cement slurry, continuously stirring, filling the mixed gas foam concrete slurry into a mold, waiting for solidification, demolding, and performing standard curing to obtain the mixed gas foam concrete. The prepared carbon dioxide mixed gas foam is more stable, the strength of the foam concrete is higher, and a new scheme is provided for carbon sequestration and emission reduction while the strength of the foam concrete is 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