177results about How to "Strong frost resistance" patented technology

The invention relates to gold tail mine concrete block and its productive technique, which belongs to wall material for building and productive technical field. Its characteristics is that the main raw material for making concrete block includes slag, cement, burnt lime, aluminum powder and water, and their mess ratio is: slag 60~70%, cement-6~10%, burnt lime-20~30% aluminum powder -0.01~0.05% and the water content can be changed according to the requirement of gold tail slime density. The invention can reach the purposes of environmental protection, energy saving, using the waste, increasing the building's quality and assuring people's health, it can use waste slag completely, with good resistance to coldness and without radioactive harm, can be compound with mortar so that solve the problem of wall surface falling down.

The present invention relates to food, and is especially glutinous rice cake and its making process. The glutinous rice cake consists of glutinous rice layer(s) in 60-70 weight portions, sugar floss layer(s) in 10-20 weight portions, and stuffing layer(s) in 10-30 weight portions. The glutinous rice cake has most modified starch to replace glutinous rice powder, maltose oligomer to replace granulated sugar and stuffing, and is sweet, fine, elastic, moderately soft and good in chewing performance. It may be produced into different kinds of different tastes.

The invention discloses a preparation method of a water permeable brick. The preparation method comprises the steps: (1) crushing aggregates; (2) sieving the crushed aggregates by using sieves with different pore diameters to obtain particles with different particle sizes; (3) proportioning the sieved aggregate particles according to a bottom material formula, adding a bonding agent, and carryingout uniform stirring to obtain a bottom material mixture; proportioning the sieved aggregate particles according to a surface material formula, and adding a bonding agent and pigment to obtain a surface material mixture, wherein the bonding agent comprises a bonding base material and liquid glue; (4) respectively mixing and stirring the bottom material mixture and the surface material mixture; (5)distributing the stirred surface material mixture and bottom material mixture twice, and carrying out compression molding to obtain a green body; and (6) firing the green body in a kiln to obtain a finished product. The water permeable brick prepared by using the preparation method is high in strength, strong in freezing resistance and excellent in water permeability; and the preparation method is few and simple in process and capable of reducing the cost.

The invention relates to a preparation method of a control agent for coal dust pollution. The preparation method adopts the components with the following weight portions: 1 to 3 portions of polyvinyl alcohol (PVA), 2 to 3 portions of industrial starch, 1 to 1.5 portions of glutinous rice flour, 85 to 95 portions of water, 1 to 2 portions of polyoxyethylene nonylphenol ether and 1 to 2 portions of sodium humate. The control agent is prepared by mixing and evenly stirring the materials. The sodium humate contains 40 percent to 60 percent of humic acid and 10 percent to 20 percent of natrium. The control agent is characterized by low cost, wide material source, stable performance, wide application, innocuity and harmlessness, low corrosion rate, no odor and the like, as well as high inhibition rate, remarkable dust suppression effect, good frost resistance performance and the like. The technique that blending the control agent and spraying the control agent on the surface are combined is adopted in large-sized coal mines, ports and coal storage in China, thus realizing dust control and flame retardancy during production, storing and transporting processes of coals.

The invention discloses an antistatic agent for a polyester elasticizing oiling agent. The antistatic agent comprises the following components in part by weight: 30 to 40 parts of fatty alcohol, 10 to 12 parts of ethylene oxide, 40 to 50 parts of phosphorus pentoxide, 1 to 3 parts of potassium hydroxide and 2 to 5 parts of deionized water. The manufacturing method comprises the follow steps of: firstly, synthesizing the fatty alcohol and the ethylene oxide to obtain fatty alcohol-polyoxyethylene ether; secondly, synthesizing the fatty alcohol-polyoxyethylene ether and the phosphorus pentoxide to obtain fatty alcohol-polyoxyethylene ether organic phosphate; thirdly, synthesizing the fatty alcohol-polyoxyethylene ether organic phosphate and the ethylene oxide to obtain fatty alcohol-polyoxyethylene ether organic phosphate alcohol-polyoxyethylene ester; and fourthly; and fourthly, synthesizing the fatty alcohol-polyoxyethylene ether organic phosphate alcohol-polyoxyethylene ester and the potassium hydroxide to obtain fatty alcohol-polyoxyethylene ether organic phosphate alcohol-polyoxyethylene ester sylvite. The antistatic agent produced by the method has the advantages of high efficiency, low cost, strong frost resistance, easiness in emulsification and capability of meeting series of requirements of post-processing such as elasticizing.

The invention relates to a dry fractionation method for palm oil, and the manufacture process flow comprises the following steps: 1: homogenizing; 2. breaking crystal; 3. freezing for crystallizing; 4. nourishing crystal; and 5. filtering. The dry fractionation method for palm oil divides palm oil into super liquid oil of which the slide melting point is lower than 6 degrees with a freezing method by using melting point difference of various glycerol trimester of palm grease and different solubility. The method of the invention adds no additives in the fractionation process; the obtained product is natural and pure and can be directly used as edible grease; because the liquid oil obtained by fractionation has low melting point, the liquid oil has strong freezing resistance, can be in liquid state in winter in South China, can be used as blend oil and can change the situation that palm oil stops selling in winter, thus enriching the grease market.

The invention provides a stress resistance ERF transcription factor gene derived from Brassica napus, a preparation method and usage thereof. The Brassica napus stress resistance ERF transcription factor gene is BnaERFB1-2-Hy15, the base sequence thereof is shown as SEQ ID No1. In the invention, the gene sequence of Brassica napus stress resistance ERF transcription factor is cloned from Brassica napus seedling by polymerase amplification technology, the obtained ERF transcription factor gene can be used in plant transformation to improve stress resistance of plants.

The invention discloses a method of preparing a ganged brick by using aluminum scruff ash, which comprises the following steps: (100) choosing the following components composed according to mass percent as materials: 60 to 65 percent of aluminum scruff ash, 15 to 20 percent of shale, 5 to 10 percent of quartz and 10 to 20 percent of additive; (200) uniformly mixing the materials composed according to the mass percent, performing ball milling on the materials by a ball mill after performing vibrational grinding on the materials to obtain powder; (300) carrying out pulp production on the powder, adding gelatin to pellet, then performing compression moulding by using a semi-dry pressing process to obtain a moulded blank; (400) drying the moulded blank in a drying tower; (500) putting the dried moulded blank in a sintering furnace to sinter to form the ganged brick. By adopting the method, the deformation of the ganged brick during the sintering process can be restrained; the strength of the ganged brick is improved; the ganged brick has the advantages of breathability and air permeability, good sound insulation function, good heat preservation function and frost resistance, moreover, the ganged brick is not easy to crack and layer.

The invention discloses a geopolymer-based artificial flood control stone prepared from all wastes and a preparation method of the geopolymer-based artificial flood control stone. The geopolymer-basedartificial flood control stone comprises the following raw materials in parts by weight: 288-412 parts of a waste silicon-aluminum material; 85-150 parts of alkali-containing waste; 29-75 parts of waste sulfate mineral; 1501-1860 parts of recycled aggregate; 216-241 parts of reclaimed water; 0-2 parts of waste fiber; and 0-5 parts of crop waste. The process is simple, the prepared artificial flood control stone has no appearance defect; the stone has the advantages of large volume density, high strength (more than 34 MPa), good weathering resistance, freezing resistance and abrasion resistance and the like, is convenient to throw, good in integrity, strong in stability, freeze-thaw resistance, weathering resistance and high-speed sand-containing water flow abrasion resistance in the usingprocess, is not easy to lose under high-speed water flow, and is an ideal substitute product for natural stone standby stone prevention.

The invention discloses a preparation method for preparing an autoclaved aerated concrete building block from building waste and alkali waste. The autoclaved aerated concrete comprises the following components in percentage by mass: 43 to 63 percent of building waste, 15 to 25 percent of alkali waste, 5 to 15 percent of lime, 15 to 20 percent of cement, 1 to 3 percent of gypsum and 0.1 percent ofaluminum powder, wherein the ratio of water to materials is 0.55. The autoclaved aerated concrete building block is prepared by stirring the components uniformly, molding by casting and performing autoclave curing. The building waste contains a large amount of silicon aluminum; CSH gel can be formed in the autoclaving process through alkali waste activation; the prepared autoclaved aerated concrete building block has properties of high strength, light weight, heat insulation and freezing resistance; various property indexes meet the A7.5B07 requirement in GB11968-2006 'autoclaved aerated concrete building block standard'; and a new approach is provided for recycling the building waste and the alkali waste.

The invention discloses frost-resistant concrete and a preparation method of the frost-resistant concrete. A frost-resistant compound cement mixture is made of waste rock slag and flue gas desulfurization gypsum of construction waste, gravels, pulverized fuel ash and other materials according to a certain manufacturing method to replace nearly 50% of common potland clinker, and the frost-resistant concrete is prepared with other admixture, additives and water mixed. On one hand, the frost-resistant concrete has high frost resistance and impervious performance. On the other hand, production cost is largely lowered, environmental pollution is reduced, and obvious economic, environmental and social benefits are achieved.

The invention discloses artificial Roman travertine and a preparation method thereof. The artificial Roman travertine is composed of the following components in parts by weight: 20-50 parts of cement,40-70 parts of sand, 2-5 parts of stone flour, 2-10 parts of silica fume, 0.2-1 part of an early strength agent, 0.1-0.5 part of a retarder, 0.2-0.5 part of latex powder, 0.1-1 part of a water reducer, 0.1-0.5 part of a defoaming agent and 0.2-2 parts of fibers and iron oxide pigment. All the components are added into a high-speed dispersing machine to be uniformly stirred, then the stirred mixture is poured into a corresponding mold, vacuum vibration is carried out on the mold, and the mold is placed into a curing box, curing is carried out under a constant-temperature and constant-humiditycondition for 10-48 hours, then demolding can be carried out, natural curing is carried out for 3-10 days after the demolding, and cutting is carried out, so that artificial Roman travertine is obtained. According to the invention, the natural effect of stone is improved, colors and patterns are controllable, and batch production is facilitated.

The invention relates to a method for producing a concrete channel prefabricated part from mineral slag. The method is characterized in that the concrete channel prefabricated part is prepared from the following raw materials in parts by weight: 60-70 parts of fine and coarse aggregate, 10-20 parts of 42.5 sulfoaluminate cement, 5-10 parts of fly ash, 5-10 parts of slag micropowder, 1-3 parts of early-strength admixture, 1-3 parts of high efficiency water reducing agent and 0.1-0.5 part of defoaming agent. The high efficiency water reducing agent is a calcium lignosulphonate water reducing agent. The concrete channel prefabricated part has the advantages of low cost, excellent properties, stable quality, excellent compression strength, excellent compression strength, excellent freeze resistance and excellent water impermeability. The method aims to further enhance the standard construction of irrigation projects, comprehensively enhance the construction level and management and protection level of agricultural hydraulic engineering in China, increase the utilization ratio of irrigation water and implement high-efficiency utilization of water resources.

The invention discloses a sintered water-permeable brick which is not blocked easily. The brick comprises a surface material and a bottom material, wherein the bottom material comprises the main raw materials of: in parts by mass, 80-100 parts of aggregate, 3-12 parts of a bonding base material, 3-12 parts of liquid glue and 0.1-5 parts of glaze, and the surface material comprises the following main raw materials of: in parts by mass, 0-30 parts of the aggregate, 0-4 parts of the bonding base material, 0-4 parts of the liquid glue, 0-2 parts of the glaze and 0-4 parts of color materials; the bonding base material is one or more of bentonite and clay, and the liquid glue is one or more of a silica sol solution, a polyacrylamide solution and a guar gum solution. Correspondingly, the invention discloses a preparation method of the sintered water-permeable brick. The water-permeable brick has high strength, strong frost resistance and excellent water permeability, particles or fiber substances in rainwater and other sewage are not hung on walls easily, and hole gaps of the water-permeable brick are not easily blocked.

The invention discloses a natural-draught brine cooling tower. The natural-draught brine cooling tower comprises a drift eliminator, a water distribution device, a stuffing area, a lambada-shaped support, a water collecting tank, a tower casing and a brine temperature-concentration control device. The brine is heated by a waste heat source, and the hot brine is sent to the water distribution device in the tower casing through an intake and riser pipe. The hot brine is uniformly sprayed on the stuffing by the water distribution device and exchanges heat with the intake air from the lambada-shaped support at the lower part of the tower casing, and the temperature and the concentration of the brine are adjusted to enable the saturated evaporation pressure to be matched with the vapor partial pressure in the air so as to restrain the evaporation and the loss of the water, thereby achieving the purpose of saving water. After cooled, the brine enters the water collecting tank, and returns to the waster heat source via a circulation brine pump for further circulation. The hot air enters the upper part of the tower casing with drifts eliminated by the drift eliminator, and then is exhausted to the upper air. The flow of the air is promoted by the chimney effect generated by the tower casing. By using the brine as the cooling medium, in addition to the function of saving water, the invention can also cool the brine to almost the environmental temperature in winter, thereby achieving the frost prevention effect. The invention can be widely used in the power field, the chemical industry field and the metallurgy field in the water-deficient area.

The invention relates to the field of concrete, and particularly discloses environment-friendly anti-freezing concrete and a preparation method thereof. The concrete comprises the following raw materials in parts by weight: 240 to 280 parts of cement, 600 to 680 parts of fine aggregate, 25 to 65 parts of water, 2.5 to 2.9 parts of a water reducing agent, 1000 to 1400 parts of recycled aggregate, 4 to 8 parts of waste textile fiber, 25 to 30 parts of silica fume, 5 to 15 parts of metakaolin, 3 to 3.5 parts of nano-SiO2, 1.3 to 3.9 parts of calcium sulfate whiskers, 0.48 to 0.56 part of an air entraining agent, 0.072 to 0.084 part of basalt fibers and 1.44 to 1.68 parts of hydroxypropyl methyl cellulose. According to the concrete, waste resources are recycled, resources are saved, the environment is protected, the integrity and the compactness degree of the concrete are high, expansive force generated in the concrete under the freezing and thawing action is small, freezing resistance is high, and compressive strength after freezing and thawing circulation is high.

The invention discloses a solar-air source combined heat pump water-free heating system with a heat storage function. The solar-air source combined heat pump water-free heating system with the heat storage function comprises a solar heat collector with the heat storage function and a heat supply system. The solar heat collector comprises a plurality of solar heat collecting pipes, an air inlet, an air outlet, a heat storage layer and a heat preservation layer, wherein the solar heat collecting pipes are distributed between the air inlet and the air outlet and connected through connectors, and an air channel is formed inside the solar heat collector. According to the heating system, after solar energy is converted into heat energy, one part of heat energy directly heats outdoor air, and the other part of heat energy is stored in a phase-change material of the heat storage layer. The heat supply system comprises an evaporator and a heat supply structure, and the evaporator and the heat supply structure communicate with each other. The air outlet of the solar heat collector communicates with the evaporator through a pipeline. Air heated by the solar heat collector and a heating medium in the evaporator are subjected to heat exchange, the heating medium evaporates when being heated, gas is converted into a heating medium of a high temperature after entering a compressor to be compressed, and heat is supplied externally through the heat supply structure.

The invention relates to the water-oxygen isolation sealing of an organic light emitting display, in particular to a multilayer thin film sealing technology of the organic light emitting display. The technology is characterized in that two layers of metal oxide films and one layer of high molecular organic film are adopted for sealing the organic light emitting display. The metal oxide film can isolate water and oxygen impurities that are greatly harmful to the organic light emitting display and simultaneously prevent the oxidation of metal layer, thereby improving the corrosion resistance, obviously reducing the degeneration rate of the device, and improving the service life of the organic light emitting display.

The invention discloses freeze-dried powder of fruit and vegetable extracts. Fruits and vegetables are taken as raw materials, a low-temperature extraction technology is adopted in the whole process, and obtained extracts keep natural color, flavor and taste of the fruits and the vegetables to the greatest extent; an anti-freeze agent which is prepared from natural plant raw materials and has a remarkable cryoprotective effect replaces traditional and existing cryoprotective agents in the vacuum freeze drying process of extracts, the freeze loss caused by a freeze-drying process is further greatly reduced, biological activity and nutritional value of the freeze-dried powder of the extracts are effectively improved, the freeze-dried powder of the extracts is scientifically compounded with functional dietary fiber powder, prebiotic factors and lactobacillus plantarum powder, the medicine and food nutrition balance property as well as functionality, solubility and the probiotic property of the freeze-dried powder of the extracts is remarkably improved, the guarantee period of a product is prolonged, and finally, the freeze-dried powder of fruit and vegetable extracts is prepared, contains more nutritional substances and bioactive substances and is high in function, good in anti-freezing effect and solubility and low in cost.

The invention provides a sintering-free flyash brick formula and a preparation method thereof, relating to the field of building material. The technology which adopts flyash to serve as a clay substituent to prepare bricks at present is widely applied, but industrial chemicals, such as cement and the like are added into ingredients in the prior art, so that the prior art has high cost of brick making material, high water absorption rate, poor freezing resistance performance and low strength, and dried finished product bricks are easy to chap and even break. The invention adopts flyash and carbide slag as raw materials; after being mixed and stirred, flyash and carbide slag are sent into a high-speed fine pulverizing double-roll grinder to be smashed and performed with edge milling; smashed edge milling mixture is mixed and stirred with slag, citric acid slag, yellow sand, sodium nitrite, sodium sulfate, sodium silicate, triethanolamine, rare earth powder, water, water glass and table salt; and the finished product is obtained by blank making, convalescing and hot-gas curing. Compared with the existing flyash brick, the quality of the sintering-free flyash brick of the invention isobviously improved, compression strength is improved, an air shrinkage value in each age is reduced, freezing resistance performance is strong, and appearance is tidy and has no chap. The invention also has the advantages of simple preparation technology, low production cost, small pollution to environment and the like.

The invention discloses a fire retardant coating, which is characterized by comprising the following materials in percentage by mass: 10-20% of cellulose ether, 10% of FEVE fluorocarbon resin, 15% of glass beads, 15-30% of pigment, 5-10% of ammonium polyphosphate, 3-8% of a curing agent, 10-30% of phenol propane epoxy resin, 4-8% of pentaerythritol, 4-8% of expanded graphite and the balance being a solvent. The product disclosed by the invention is flame-retardant or non-inflammable, so that a protected substrate is kept from direct contact with air, thus delaying firing and combustion speed of an object; and besides the performance of being flame-retardant or non-inflammable, the fire retardant coating additionally has a relatively low heat conductivity coefficient, and can delay transmission of flame temperature to the protected substrate.

The invention provides a plate spliced pervious roadbed made by utilizing waste plastics. The waste plastics comprise propylene, polyethylene, polypropylene, polyvinyl chloride and the like. Accordingto the current market conditions, the polyethylene plastics account for 50% of the waste plastics and belong to thermoplastic resin polymers. Therefore, the thermoplastic waste plastic products can be selected to produce and make the plate spliced pervious roadbed. Bulges and grooves of multiple shapes are formed in the left and right sides of the pervious roadbed plate, so that two adjacent pervious roadbed plates are inserted together. Drill holes through which steel strands penetrate are formed in the upper and lower sides, and the pavement can be tight and stable when the steel strands are connected together. A plurality of bulges are arranged on one side, which is close to the pavement, of the roadbed plates and can be matched with the plate spliced pavement, so that the bulges on the roadbed blocks are inserted into the grooves in the pavement panel so as to achieve an excellent stabilizing effect.

The invention relates to a straight-way solar energy heat exchange heat collector using solar energy as a heat source and belongs to the technical field of medium and high temperature solar energy utilization. The straight-way solar energy heat exchange heat collector comprises a straight-way transparent tube, a multi-curved face metal heat exchange tube, heat exchange tube end enclosures, a metal expansion joint, adsorbent storage rings, concave spacing sealing rings, metal snap rings, a working medium channel pipe, metal cover plates, sealing fixed plates, card type shield covers and vacuum connectors, wherein the two ends of the multi-curved face metal heat exchange tube are welded and fixed with the heat exchange tube end enclosures; the working medium channel pipe is connected with the heat exchange tube end enclosures; the multi-curved face metal heat exchange tube is provided with the metal expansion joint; the working medium channel pipe passes through the center of the metal cover plate to form an multi-curved face metal heat exchange tube component which is integrally sleeved in the straight-way transparent tube and the two ends of which are sequentially provided with the adsorbent storage rings, the concave spacing sealing rings and the metal snap rings; the sealing fixed plates seal and fix the metal snap rings and the metal cover plates; the two ends of the straight-way transparent tube are provided with the card type shield covers; and the vacuum connectors are fixed on the card type shield covers.

The invention refers to the field of building materials, and provides a rapidly-dry super-strong freezing-resisting white emulsion. The rapidly-dry super-strong freezing-resisting white emulsion is composed of the following components in part by mass: 1000-1400 parts of water, 20-40 parts of PVA 2099, 50-70 parts of PVA 1788, 0.5-1.5 parts of defoaming agent, 5-10 parts of alkylphenol polyoxyethylene ether, 500-800 parts of vinyl acetate, 1-2.5 parts of ammonium persulfate, 5-10 parts of NaHCO3, and 30-50 parts of dibutyl phthalate. The rapidly-dry super-strong freezing-resisting white emulsion takes PVA and VAC as the main raw materials, and free from poison, extraneous odour and harm to human body. It makes the user's domestic environment keep harmony and health. The white emulsion is quick in drying, strong in adhering force, high in viscosity, super strong in freezing resistance, good in water resistance, and is environmental-friendly type bonding. Meanwhile, the white emulsion has multiple using methods of direct bonding, thinning by water, natural drying, heating and drying. The white emulsion is applicable to furniture manufacturing industry and decorative industry, and has very strong bonding force to fiber board, decorative board, woodware and others; besides, the white emulsion has multiple purposes in paper product, printing textile, printing and dyeing, building, and the like.

This invention relates to a wall mould drilling architecture structure process method, which is characterized by the following: first making architecture module from surface wall plate to form concrete drilling chamber; putting steel skeleton into the chamber and then drilling concrete to form integration structure. This invention adopts the above structure and uses the wall plate as drilling module without disassembling.

The invention belongs to the technical field of petroleum additive products, and particularly relates to a novel diesel compound additive. The novel diesel compound additive is prepared from antioxidant, cetane number improver, and low-temperature flow improver. The diesel compound additive can obviously improve storage stability of fuel oil, has an obvious effect of improving combustibility, makes fuel oil completely combusted, and has excellent frost resisting capacity at a low temperature, is suitable for common diesel, and even has the very ideal effect of optimizing secondary processing diesel with harsh requirement, so that the utilization field and range of the diesel is widened.

The invention relates to a gene descended from insect antifreeze peptide and a preparation method and application thereof. The nucleotide sequence of the gene is shown in SEQ ID NO 1, the amino acid sequence of the protein encoded by the gene is shown in SEQ ID NO 2; and the gene is the CFAFP3I gene which is prepared by modifying the CFAFP3I gene of insect antifreeze peptide according to the preferred codons of plant through the gene synthesis method. When the gene is used to transform Arabidopsis thaliana, the anti-freezing capability of the transgenic Arabidopsis thaliana can be increased. The gene of the invention plays an extremely important role in the cultivation of the anti-freezing plant variety and has important theoretical significance and practical significance.

The invention discloses an airtight concrete material, wherein the preparation method comprises: stirring continuous graded limestone coarse aggregate, clean medium river sand, grinded mineral powder,II-grade fly ash, ordinary Portland cement, an efficient water reducing agent, a special air entraining agent and water, carrying out compact molding, and carrying out standard curing, and the airtight concrete material is the main concrete material of tunnel secondary lining structures in environments with overflowing of coal gas and other toxic and harmful gases. According to the invention, theairtight concrete material has the main characteristic of compactness, wherein the elastic gas bubbles exist in the capillary pores in the substructure, so that the gas permeation resistance, the impermeability, the alkali-aggregate reaction resistance, the crack resistance, the frost resistance and the like are excellent; and the raw materials excluding the special air entraining agent are widein the sources, and the preparation process is simple.

The invention discloses an iron tailings baking-free brick and a preparation method thereof. The iron tailings baking-free brick is prepared from the following main raw materials in percentage by mass: 50 to 70 percent of iron tailings, 5 to 8 percent of iron ore waste stone nitrate, 5 to 8 percent of steel slag, 15 to 20 percent of cement, 2 to 5 percent of gypsum, 1 to 3 percent of adhesive, 3to 5 percent of straw and 10 to 15 percent of water. The preparation method comprises the following steps: carrying out primary machining on the raw materials, burdening in proportions after meeting abrick-making requirement, then uniformly mixing and stirring, carrying out compression molding under the molding pressure of 20 to 25 MPa, and naturally curing for 21 days at normal temperature, thuspreparing the iron tailings baking-free brick. According to the iron tailings baking-free brick disclosed by the invention, the problems that an iron tailings baking-free brick prepared in an original mode is easy to crack, easy to shrink and low in strength can be favorably improved, the strength can be up to MU20 grade or above, and the iron tailings baking-free brick has the characteristics ofhigh rate of qualified products, high strength, no need of autoclaved curing, low brick-making cost and the like, is a novel building material for partially replacing sintered clay bricks, is beneficial for increasing the resource utilization rate, reducing land occupation of tailings and improving the environment, and has good economic benefit and good social benefit.

The invention relates to a method for producing a prefabricated member of a concrete ditch by using coal gangue. The method is characterized in that the prefabricated member of the concrete ditch is prepared from the following raw materials in parts by weight: 50-60 parts of coarse and fine aggregates, 5-10 parts of coal gangue powder, 10-15 parts of 42.5 sulfoaluminate cement, 2-5 parts of early strength agent, 2-5 parts of thickening and reinforcing agent, 1-3 parts of efficient water reducing agent and 0.1-0.5 part of antifoamer, wherein the efficient water reducing agent is a calcium lignosulfonate water reducing agent. According to the method, the prefabricated member of the concrete ditch is low in cost, excellent in performance and stable in quality and has excellent compressive strength and antifreeze and impervious performance; and the standardized construction of farmland water conservancy is further strengthened, the construction level and management level of farmland water conservancy projects in China are comprehensively increased, the utilization ratio of irrigation water is increased, and the efficient utilization of water resources is achieved.