45results about How to "Stable compressive strength" patented technology

The invention provides an autoclaved aerated concrete brick prepared by utilizing pulverized fuel ash and a preparation method thereof. The brick is prepared from the following materials by weight percent: 65%-68% of pulverized fuel ash, 17%-23% of lime, 6%-10% of cement, 2%-4% of desulfurization gypsum, 1%-1.5% of water-soluble aluminum powder, 0.5% of fatty acid soap and 0.5% of gleditsia sinensis powder. The preparation method comprises steps of: adding water to pulverized fuel ash and desulfurization gypsum which are screened mechanically and grinding together to form slurry, wherein the fineness of the pulverized fuel ash has to reach the condition that the residual of a 0.08mm square hoe sieve is not more than 15%; carrying out stirring, pouring, cutting and thermal, static and suspension curing on the slurry together with the lime, the cement and the aluminum powder suspension liquid which are weighed according to a weight ratio of a formula; utilizing an autoclave with good sealing for heating with 180-200 DEG C saturated steam under proper pressure (1.0-1.2Mpa); and steam curing for 8-10 hours so as to produce the aerated concrete brick. The aerated concrete brick has the characteristics of light weight, high strength, good heat insulation performance, good fire resistance and sound absorption, labor saving and energy saving, waste recycling and the like; and the aerated concrete brick meets constructional engineering requirements and environment protection requirements, and the wastes of enterprises are reasonably used.

The invention relates to an extra-large fiber reinforced plastic (FRP) combined storage tank structure with a floating roof, and a construction method of the storage tank structure. The extra-large FRP combined storage tank structure comprises a tank top, a tank wall and a tank bottom, wherein the tank top has an FRP latticed shell structure; FRP plates are laid on the FRP latticed shell structure; the tank wall is composed of an inner layer FRP plate, an outer layer FRP plate and active powder concrete between the inner layer FRP plate and the outer layer FRP plate; the floating roof is arranged in the tank cover; a connection piece is arranged between the inner layer FRP plate and the outer layer FRP plate; concrete trapezoid grooves are sequentially formed between the inner layer FRP plate and the outer layer FRP plate along a circumferential direction; prestress bars are pulled between every two adjacent concrete trapezoid grooves section by section; and the inner layer FRP plate and the outer layer FRP plate are formed by connecting FRP spliced plates through tenon tongues and tenon grooves. The extra-large FRP combined storage tank structure is high in corrosion resistance and freezing resistance, insensitive to temperature change, low in heat transmission speed, favorable for keeping temperature in a tank body, high in compression strength, high in corrosion resistance and relatively high anti-permeability.

The invention relates to a low-water-absorption foamed concrete and a preparation method thereof. The low-water-absorption foamed concrete is prepared from ordinary Portland cement, sulphoaluminate cement, raw material soil, water, a thickening agent, a water-reducing agent, a foam-stabilizing agent, an accelerator and a foaming agent. Through addition of the sulphoaluminate cement and the accelerator which can accelerate coagulation of the ordinary Portland cement, break of bubbles during an initial setting time is reduced and an opening porosity and water absorption of the foamed concrete are reduced. Through addition of the thickening agent, thickness of the foamed concrete can be adjusted and upward-floating of the bubbles is reduced so that the bubble is distributed uniformly. The foamed concrete is low in water absorption, is uniform in volume weight, is stable in compressive strength and has a better thermal-insulation and temperature-preserving performance, a better mechanical performance and a better freeze-thaw-destroy resistant performance.

The invention relates to smart concrete, in particular to CCCW-mixing graphite smart concrete formed by adding CCCW concrete mixture and graphite into base materials comprising silicate cement and sand, wherein the mass ratio of cement to sand is 1 to 1; and other components in percentage by weight to the total mass of the cement and the sand are as follows: 1 to 2 percent of CCCW concrete mixture and 5 to 25 percent of graphite. By utilizing the tunneling conducting effect between the contact electric conduction of the graphite and the electric conduction phase, the invention forms the graphite electrical conduction concrete with smart property, and has the advantages of favorable electric conduction, high mechanical property, stable electrical conductivity and pressure-sensitivity, simple preparation, lower price, and the like; and the material can be utilized for manufacturing a concrete structure sensor element, can be used for the effective execution of the health supervision of the concrete structure and can also be used as an industrial anti-static material, an electrical engineering material and an electrothermal material.

Provided is an inversion type energy conservation roofing system and a construction method thereof. The system comprises from bottom to top a concrete base layer, a cement mortar screeding layer, a waterproof cushion layer, a heat preservation drainage layer, transverse tile hanging battens and roofing tiles; the heat preservation drainage layer comprises from bottom to top a heat preservation plate layer, a cement mortar protection layer, a longitudinal downstream batten and an aluminum foil coiled material; the longitudinal downstream batten is fixedly connected to the cement mortar protection layer through an anchoring part. According to the inversion type energy conservation roofing system and the construction method thereof, the construction of the system is simple and the construction is convenient; an inversion structure is adopted, a heat preservation layer is laid on a waterproof layer, the cement mortar protection layer is added to cover the heat preservation layer, so that the heat preservation layer and the waterproof layer are protected, destroying of thermal stress, ultraviolet light and other factors is effectively avoided, the heat preservation, thermal insulation and waterproofness effects of the roofing are ensured, and the roofing structure is reinforced; a wooden support is not used, the situation that the anchoring part is knocked in the cement mortar screeding layer and the concrete base layer of a house is avoided, thus the integrity of the screeding layer and a structure layer of the house are guaranteed, the heat preservation effect is better, and the possibility that water seepage occurs in a tack hole place is reduced.

The invention discloses high-water-permeability concrete water-permeable ground tiles. The high-water-permeability concrete water-permeable ground tiles are prepared from the following raw materials in parts by weight: 120-150 parts of a main material, 2-10 parts of glutinous rice flour, 1-6 parts of gypsum, 1-2 parts of magnesium carbonate, 20-40 parts of regenerated rubber powder, 60-100 parts of blast furnace slag, 1-2 parts of aluminum powder, 6-10 parts of fly ash, 3-8 parts of sepiolite powder, 1-6 parts of mica powder, 4-10 parts of basalt fiber, 2-9 parts of heavy calcium carbonate, 1-4 parts of microcrystalline cellulose, 1-2 parts of polydimethylsiloxane, 1-2 parts of tartaric acid, 1-2 parts of a water-reducing agent, and 100-200 parts of water. A carbon nanotube composite is prepared by adopting a technology comprising the following steps of uniformly mixing urea, formaldehyde and water, adjusting the pH value of the system to 8.6-8.9, and carrying out heating with stirring; adding lecithin, carbon nanotubes and N,N-dimethyl-formamide, and carrying out uniform stirring; and then, adding polypropylene, and carrying out stirring so as to obtain the carbon nanotube composite.

The present invention relates to the technical field of building materials, and in particular relates to a lightweight aggregate concrete small hollow block with a large doping amount of fly ash slag. The hollow block comprises the components of: 20-50 parts of fly ash, 35-70 parts of blaster furnace slag, and 8-15 parts of cement. The invention comprehensively utilizes fly ash and blaster furnace slag produced in heat-engine plant, and has large utilization amount of waste; the technology can be used in industrial production to reach high utilization rate and large amount of industrial wastes; the prepared products has stable compressive strength of above 5MPa, density of less than 800kg / m<3>, and excellent properties.

The invention relates to a rapid replacing method and a restoring method for a bridge expansion joint, which relates to the technical field of bridge expansion joints. The replacing method comprises the following steps of 1, cutting off original poured concrete in an expansion joint groove and dismantling the original expansion joint device and a beam body embedded reinforcement; step 2, cutting off and trimming the expansion joint groove, whose original poured concrete and expansion joint device are cut off, until the edge of the expansion joint groove is neat; 3, embedding a new beam body embedded reinforcement and a new expansion joint device in the expansion joint groove; 4, coating a bonding layer in the expansion joint groove; 5, pouring modified MMA composite concrete in the expansion joint groove and tamping the modified MMA composite concrete after the modified MMA composite concrete is poured; and 6, striking off the upper surface of the poured concrete and mounting an expansion joint sealing rubber strip on the poured concrete. According to the invention, as the adopted modified MMA composite concrete has the advantages of high mechanical strength, interface bonding force and high compressive strength, the service life of the replaced bridge expansion joint is obviously prolonged, the bridge expansion joint is simple and convenient in construction, and the curing time of the bridge expansion joint is short.

The invention discloses a sample preparation method and a compaction device for immature soil base materials. The method comprises the steps that the interior of a mold is coated with a lubricating oil layer, the immature soil base materials are put into the mold layer by layer, the immature soil base material layers in the mold are compacted through a jack every time one layer of immature soil base material is laid, and therefore a sample to be detected is obtained; the compaction speed of the jack is 0.5 mm / s, the compaction pressure of the jack is 18-19 K / N, and the compaction time of the jack is 3-5 min; the compaction device comprises a test bed, the test bed is sequentially provided with a first platform and a second platform in parallel in the horizontal direction from top to bottom, the second platform is coaxially provided with the jack, a gasket, the mold and a pressing column in sequence from bottom to top in the vertical direction, and the top end of the pressing column abuts against the first platform. Compared with a traditional hammer test, a press compaction test and a jack compaction test, the compressive strength of a test piece compacted by the jack is more stable than the compressive strength of a test piece compacted by the other two test methods, test piece overall deformation is good, and the test piece has good ductility when compacted.

The invention relates to a partition wall ribbon plate, in particular to a partition wall ribbon plate prepared from pulverized fuel ash and desulfurized gypsum and a preparing method of the partitionwall ribbon plate. The partition wall ribbon plate is prepared from, by weight, 40-80% of the pulverized fuel ash, 5-20% of the desulfurized gypsum, 5-30% of aggregate and 5-20% of admixture, and theadmixture is prepared from, by weight, 30-35 parts of silicate, 3-5 parts of borate, 1-2 parts of sulfate, 3-5 parts of phosphate, 3-5 parts of hydroxide, 1-2 parts of haloid and 1-5 parts of lignosulfonate. Under the synergistic effect of all components of the admixture, all oxides in the pulverized fuel ash are subjected to a bonding reaction, a hardened framework like a mullite crystal structure and an ettringite crystal structure is generated, and the pulverized fuel ash treated by the admixture shows stable physical and chemical properties. The pulverized fuel ash difficult to treat is treated to obtain the partition wall ribbon plate, and the partition wall ribbon plate has the functions of being light, preserving heat and being high in strength and resistant to fire and water and the like.

The invention relates to an activator, in particular to a compound pulverized fuel ash activator and application. The compound pulverized fuel ash activator is used for activating pulverized fuel ash,and is prepared from, by weight, 30-35 parts of silicate, 3-5 parts of borate, 1-2 parts of sulfate, 3-5 parts of phosphate, 3-5 parts of hydroxide, 1-2 parts of haloid and 1-5 parts of lignosulfonate. Sulfate is prepared from dicalcium silicate, tricalcium silicate and a C component, and the C component is prepared from at least one of sodium silicate, sodium metasilicate or potassium metasilicate. By means of the compound pulverized fuel ash activator and the application, the pulverized fuel ash is directly or indirectly subjected to chemical modification of the surface of the pulverized fuel ash and modification of substances among particles of the pulverized fuel ash, generation of gel substances and the generation of all structure crystals are promoted, and treated pulverized fuel ash shows stable physical and chemical performance. The invention further provides the application of the compound pulverized fuel ash activator in preparing partition slats, the prepared partition slats have stable quality, have the fireproof level of A1, and have the advantages of having low weight, heat insulation, high strength, fire resistance, water resistance and the like.

The invention provides concrete and a preparation method thereof. The concrete comprises, by weight, 250 to 350 parts of cement, 300 to 500 parts of a building waste aggregate, 100 to 150 parts of a foaming material, 5 to 10 parts of a foaming agent, 15 to 30 parts of an anti-cracking additive and 100 to 150 parts of water. The preparation method solves the environmental pollution problems caused by construction wastes and reasonably reduces the cost of the concrete. The prepared concrete has good compression resistance, shearing resistance and water resistance, greatly enhances the crack resistance and impermeability of the concrete and greatly prolongs the waterproofing period of buildings.

The invention discloses a resin plugging agent and a preparation method thereof. The resin plugging agent comprises 40-80 parts of a main agent, 10-30 parts of a curing agent, 4-6 parts of a density regulator, 0.1-5 parts of an accelerant, 1-8 parts of a hard inorganic material and 0.5-3 parts of a coupling agent. The main agent is one or a combination of more of phenolic resin, alkyd resin, amino resin, polyester resin, epoxy resin, polyurethane resin and acrylic resin; the curing agent is one or a combination of more of modified amine, aliphatic polyamine, alicyclic polyamine, low-molecular polyamide and tertiary amine; the density regulator is hollow glass beads; the accelerant is one of sodium carbonate and barium carbonate; the hard inorganic material is aluminum oxide powder; and the coupling agent is a silane coupling agent KH570. The plugging agent has the characteristics of good plugging effect, high adhesion strength, high compressive strength and high temperature resistance, meanwhile, the preparation method is simple, and the raw materials are easy to degrade and free of pollution.

The invention discloses glass and benzene composite thermal insulation mortar, which is prepared by the following steps of: weighing cement and mineral powder according to weight part, putting into a mixer, weighing polypropylene fibers, redispersible latex and cellulose ether, putting into the mixer, and uniformly stirring to form a premix; respectively weighing the premix, vitrified micro bubbles and polystyrene granules, adding into a spiral ribbon mixer, stirring the three materials uniformly, and completely opening a bin gate at the bottom of the mixer to obtain the uniformly stirred glass and benzene composite thermal insulation mortar; and packaging the glass and benzene composite thermal insulation mortar by using a packaging machine. The glass and benzene composite thermal insulation mortar has the advantages of low water absorption, small conductivity factor, high strength, and good thermal insulation performance, the flammability can be greatly reduced, the construction efficiency is improved and the manpower is saved.

The invention discloses a high-strength CFB boiler high-aluminum refractory plastic material, and belongs to the technical field of high-strength wear resistant plastic materials. The refractory plastic material of the invention can reach high strength in a range below 900 DEG C. After calcination at 900 DEG C for 3 hours, tests show that the compressive strength is stable to 190-210 MPa and the flexural strength is stable to 33-38 MPa. Compared with a conventional CFB refractory plastic material, the refractory plastic material of the invention is greatly improved in strength. The refractoryplastic material of the invention is convenient in construction and suitable for industrial applications.

The invention discloses a resin adhesive with high waterproofness and high durability. The resin adhesive is prepared from the following raw materials in parts by weight: 40 to 90 parts of unsaturated resin 189, 5 to 15 parts of modified asphalt, 1 to 8 parts of natural gas-based slot black, 2 to 4 parts of cotton flocks, 5 to 15 parts of glass fibers, 5 to 15 parts of mica powder, 1 to 8 parts of hollow microspheres, 5 to 12 parts of titanium dioxide powder, 2 to 6 parts of calcined clay, 5 to 15 parts of organic bentonite, 2 to 7 parts of wollastonite powder, 2 to 10 parts of 1,1-di(tert-butylperoxy)cyclohexane, 5 to 15 parts of microcrystalline wax, 1 to 6 parts of hydroxyethyl methylcellulose, 2 to 8 parts of fumed silica and 50 to 120 parts of water. The resin adhesive provided by the invention is extremely high in waterproofness and high in corrosion resistance and durability.

The invention discloses an environmentally-friendly hollow brick used for buildings. The environmentally-friendly hollow brick is prepared from the following raw materials in parts by weight: 15-25 parts of cement, 25-35 parts of ore tailings, 15-20 parts of purified filler, 3-5 parts of plant powder, 2-4 parts of sulphur powder, 0.5-1.5 parts of nano-zinc oxide, 2-4 parts of glass fiber, 1-2 parts of carbon fiber, 30-40 parts of coal ash, 10-16 parts of emulsion powder and 6-8 parts of industrial mildew preventive. The environmentally-friendly hollow brick used for building decoration has the characteristics of abrasion resistance, high compressive strength, high water absorption, fire prevention and temperature preservation. In addition, the environmentally-friendly hollow brick also has functions of emitting aromatic odor and purifying air, a great quantity of industrial wastes are used as raw materials so as to perform effects on saving energy, reducing emission, preventing environment pollution and being ecological and environmentally friendly. Meanwhile, the preparation method for the hollow brick has the advantages of lower material cost, abundant raw material, simple and clear technology, easiness in operation, easiness in realizing industrial production, higher practical value and good application prospect.

The invention relates to a preparation method of an anticorrosive agent suitable for a CO2 corrosion resistant cement paste system, wherein the method comprises the steps: putting formaldehyde into areaction device, raising the reaction temperature to 40-45 DEG C, adding a first part of reaction monomer, and regulating the pH value of the reaction system to alkalescence by using alkali; raising the temperature to 65-70 DEG C for reaction, adjusting the pH value of the reaction system to be acidic by using acid, and continuing the reaction; adjusting the pH value of the reaction to 5.4-6 by using an alkaline solution, adding a second part of reaction monomer, and reacting at a constant temperature; adjusting the pH value of the reaction to 6-6.5 by using an alkaline solution, adding a third part of reaction monomer, and continuing the constant-temperature reaction for 15-20 min; and adjusting the pH value of the reaction to 8-9 by using an alkaline solution, cooling and discharging. The synthesized anticorrosive agent is milk white liquid, is stable in performance and good in water solubility, and has good compatibility and corrosion resistance with cement paste.

The present invention discloses an autoclaved lime sand brick and a production method thereof, and solves the problems that in the prior art lime sand brick production cycle is long, the intensity is not high, the discrete degree is great and the like; the autoclaved lime sand brick is characterized in that: on the traditional basis of green sand and quick lime, a right amount stone chip is added, the quick lime is crushed, then the quick lime, the green sand and the stone chip are firstly mixed with water in an ash mixing machine, after 2.5 ~ 3 hours of hopper type digestion, secondary stirring is performed to make caking in the mixture broken and loose, the mixture is sent by a conveying system into a turntable type molding machine for pressing into green bricks, the pressed green bricks are sent by a traction machine into an autoclave for high temperature and high pressure autoclaving to produce the autoclaved lime sand brick with the strength more than 2 times of that of national standard of ordinary standard bricks.

The invention discloses foamed concrete and a preparation method thereof. The foamed concrete comprises the following raw materials in parts by weight: 160-200 parts of cement, 60-140 parts of ore powder, 60-130 parts of fly ash, 120-210 parts of water, 80-140 parts of a foam material, 12-25 parts of a binder, 10-20 parts of a foaming agent, 10-20 parts of a dispersant and 60-90 parts of coated wollastonite powder, wherein the coated wollastonite powder is prepared by the following steps: firstly, performing ball mill dispersion treatment on a raw material, namely wollastonite powder, with alcohol for 4-6 hours, drying obtained slurry, and sintering the dried slurry for 2-3 hours at 420-480 DEG C. As gaps in the surface of the foamed concrete is bonded by using a waterproof adhesive, heatconduction of the foamed concrete is prevented, then the heat conductivity of the foamed concrete is improved, the flame retardancy and compressive strength can be greatly improved, the shock resistance, the sound insulation and the weather resistance of a finished product, namely a foamed concrete product, can be improved to a certain extent, and the reliability and the practicability of the product can be improved.

The invention discloses a tunnel auxiliary heat type heat preservation integrated drainage system. The system is provided with a nano-vacuum insulation board between a self-adhesive waterproof board and an annular blind pipe and between the initial support of the tunnel inverted arch and a secondary lining, the side ditch of the system comprises a side ditch body and a cover plate, wherein electric tracing bands are laid at the bottom of the side ditch body, a buffer layer wraps the surface of the electric tracing bands, the buffer layer just fills the bottom of the side ditch body completely,a waterproof layer is laid on the upper surface of the buffer layer, and the two sides of the waterproof layer extend to be in sealed connection with the side wall of the side ditch body. The systemhas the advantages that a side ditch structure has a heat-laying function, and the phenomena such as side ditch icing, frost heaving and ice plug can be effectively avoided; the electric tracing bandsare wrapped by the buffer layer, so that the safety and the anti-extrusion performance are improved; the waterproof layer is arranged above the buffer layer and can effectively block the flowing water to soak the electric tracing bands, the working stability and the service life of the electric tracing bands are improved, and hot air generated under the waterproof layer penetrates through the waterproof layer to be discharged, so that expansion and damage are avoided.

The invention discloses a phosphogypsum-based imitated granite structure building material and a preparation method thereof. The phosphogypsum-based imitated granite structure building material comprises the following raw materials in parts by weight: 400-800 parts of phosphogypsum, 300-500 parts of electrolyzed yellow phosphorus slag and 20-40 parts of quick lime. The preparation method comprises the steps of material preparing, ageing, forming, autoclave curing, phosphogypsum base material preparing, drying, spraying and finished product forming. The phosphogypsum-based imitated granite structure building material has the characteristics of simple construction process, light weight, good waterproofness and fire resistance, high compressive strength, high bending strength and good weatherability; furthermore, the phosphogypsum-based imitated granite structure building material as an indoor decorative building material has the excellent decoration effect; besides, a large amount of phosphogypsum is consumed, the exploitation of natural stones is reduced, and very important significance is provided for environmental protection and achievement of sustainable development.

The invention provides a split portable multipurpose firewood stove. The existing firewood stove is heavy in weight and large in size, the fuel is not easy to carry, the combustion controllability ispoor, the fuel needs to be frequently added, and the operation is complex. The detachable furnace body comprises two forming sheets, and a cylindrical furnace body is defined between the two forming sheets, an upper furnace tray and an lower furnace tray are detachably connected to the top end and the bottom end of the detachable furnace body respectively, an upper grate and an lower grate are detachably connected to the interior of the detachable furnace body, the interior of the detachable furnace body is sequentially isolated from top to bottom through the upper grate and the lower grate toform an upper hearth, a lower hearth and an ash falling chamber, the outer wall of the detachable furnace body is detachably connected with a steering cylinder, the exhaust chimney is communicated with the upper hearth of the detachable furnace body through the steering cylinder, an opening communicated with the upper hearth is machined in the outer wall of the detachable furnace body, a furnacedoor is hinged to the opening, and the outer wall of the detachable furnace body is provided with an ash outlet communicated with the ash falling chamber. The split portable multipurpose firewood stove is used outdoors.

A cement base environmental protecting motar powder, the components in mass portion are: common portland cement or cement semi-finished product 10-50, industrial waste residue 30-80, plaster 2-8, motar thickening agent 1-3. The prodn. method is to mix said materials weighted according to grade matching composition of design, then to levigate them to obtain product, the fineness is controlled in 0.08mm, the sieved margin of square hole screen is less than 10 percent.

The invention discloses a phosphogypsum-based stone-like structure building material and a preparation method thereof. The phosphogypsum-based stone-like structure building material is prepared from the following raw materials in parts by weight: 30-80 parts of phosphogypsum, 15-60 parts of electrolytic yellow phosphorus slag and 2-10 parts of quicklime. The preparation method comprises the following steps: burdening, ageing, molding, carrying out autoclaved curing, drying phosphorus gypsum base material, spraying and forming a finished product. The phosphogypsum-based stone-like structure building material has the characteristics of simple construction process, light weight, good waterproof and fireproof properties, high compressive strength, high breaking strength and high weather resistance, and has a good decoration effect as an indoor decoration building material; meanwhile, a lot of phosphogypsum is consumed; exploitation of natural stones is reduced; and the phosphogypsum-based stone-like structure building material has important significance on environment protection and realization of sustainable development.

The invention discloses a phosphogypsum-based stone-like structure building material and a preparation method thereof. The phosphogypsum-based stone-like structure building material is prepared from the following raw materials in parts by weight: 160-240 parts of phosphogypsum, 140-180 parts of electrolytic yellow phosphorus slag and 10-15 parts of quicklime. The preparation method comprises the following steps: burdening, ageing, molding, carrying out autoclaved curing, drying a phosphorus gypsum base material, spraying and forming a finished product. The phosphogypsum-based stone-like structure building material has the characteristics of simple construction process, light weight, good waterproof and fireproof properties, high compressive strength, high breaking strength and high weather resistance, and has a good decoration effect as an indoor decoration building material; meanwhile, a lot of phosphogypsum is consumed; exploitation of natural stones is reduced; and the phosphogypsum-based stone-like structure building material has important significance on environment protection and realization of sustainable development.

The invention discloses a phosphogypsum-based marble-imitated structure building material and a preparation method thereof. The phosphogypsum-based marble-imitated structure building material is prepared from the following raw materials in parts by weight: 300-800 parts of phosphogypsum, 150-600 parts of electrolytic yellow phosphorus furnace slag and 10-100 parts of quick lime. A preparation method for the phosphogypsum-based marble-imitated structure building material comprises the following steps: burdening, ageing, forming, performing autoclaved curing, processing a phosphogypsum substrate, drying, spraying and obtaining a finished product. The phosphogypsum-based marble-imitated structure building material has the characteristics of being simple in construction process, light, good in waterproof and fireproof performance, high in compressive strength, high in breaking strength and strong in weather resistance and has a good decorative effect while being used as an indoor decorative building material, a great deal of phosphogypsum is consumed, exploitation of natural stones is reduced, and very import important significance is achieved for protecting the environment and realizing sustainable development.

A disclosed modified waterproof agent is prepared from the following raw materials in parts by weight: 8-16 parts of hydroxy silicon oil emulsion, 2-7 parts of calcium chloride, 10-20 parts of silicon powder, 3-6 parts of stearic acid, 9-16 parts of styrene-butadiene rubber emulsion, 4-8 parts of paraffin, 4-8 parts of ferric oxide, 6-12 parts of alumina, 2-5 parts of sodium silicate, 9-17 parts of glutaraldehyde, 5-11 parts of potassium dichromate, 4-7 parts of nitrocellulose, 3-6 parts of tributyl phosphate, 8-16 parts of acrylamide, 1-4 parts of sodium dodecyl benzene sulfonate and 20-50 parts of water. The provided modified waterproof agent is good in waterproof performance and high in anti-permeation strength.