140 results about "Natural sand" patented technology

A bioenergy generator to increase the life force of a biological system is provided. The bioenergy generator includes fine pieces of natural stone, fine pieces of natural sand, fine pieces of metal, water and a supporting material operable to hold the natural sand, the natural stone, the metal, and the water together. Uses of the bioenergy generator are also provided, in particular, to enhance stem cell production.

A bioenergy generator to increase the life force of a biological system is provided. The bioenergy generator includes fine pieces of natural stone, fine pieces of natural sand, fine pieces of metal, water and a supporting material operable to hold the natural sand, the natural stone, the metal, and the water together. Uses of the bioenergy generator are also provided, in particular, to treat long-COVID and influenza.

A shoe or other footwear has a non-removable multi-layer foot-support member (FSM) embedded within the sole. The uppermost layer is a breathable, stretchable textile configured for direct contact with the foot, offering softness and elasticity. Directly beneath it is a containment layer made of elastic fabric partially infused or impregnated with silicone, which stabilizes and restrains the granular contents below. The central layer includes one or two or three sealed chambers filled with a cured mixture of silicone and polymeric granules, forming a deformable medium that yields under pressure and mimics natural granular terrain or sand. Beneath this is a synthetic textile layer that restricts lateral expansion of the granular mixture, and preserves chamber geometry during use. The bottom component is a semi-rigid base that structurally supports and anchors all overlying layers.

The application discloses a mechanism sand concrete design method for reducing flowability loss over time, which comprises providing a first base material of concrete, compensation water and super absorbent polymer; based on the 5min spread of the mortar mixture prepared based on the first base material and the empirical water absorption of the super absorbent polymer, the estimated water absorption of the super absorbent polymer is determined through a first test; based on the estimated water absorption and the 1h spread of the second base material which is equal to the mechanism sand and replaced by natural sand, the amount of the compensation water is determined through a second test; based on the amount of the compensation water and the estimated water absorption of the super absorbent polymer, the addition amount of the super absorbent polymer in the first base material is determined; based on the addition amount of the super absorbent polymer and the amount of the compensation water, the preset mass ratio is adjusted to obtain the design ratio of the mechanism sand concrete. The application solves the problem that the water absorption of the mechanism sand in the concrete leads to high flowability loss over time of the concrete.

The invention provides carbon sequestration concrete and a preparation method thereof, and relates to the technical field of building materials. The carbon sequestration concrete provided by the invention is prepared from the following preparation raw materials in parts by mass: 280 to 320 parts of cement, 40 to 50 parts of mineral powder, 50 to 60 parts of fly ash, 650 to 700 parts of machine-made sand, 200 to 240 parts of natural sand, 750 to 850 parts of large stone, 150 to 170 parts of small stone, 3.8 to 4.5 parts of a water reducing agent, 0.15 to 0.85 part of a retarder, 4 to 20 parts of sodium carboxylate and 180 to 200 parts of water. Sodium carboxylate is introduced as a carbon sequestration aid, carboxylate radical groups of sodium carboxylate can efficiently complex calcium ions released by cement hydration to form a soluble calcium carboxylate complex, so that the chemical reaction that carbon dioxide is mineralized into calcium carbonate is accelerated, the carbon dioxide absorption capacity of concrete is remarkably improved, and the carbon sequestration efficiency is improved. The carbon sequestration concrete provided by the invention has high carbon sequestration performance and excellent mechanical properties.

The invention discloses mass concrete for a water-saving ship lock and a preparation method of the mass concrete. The mass concrete for the water-saving ship lock is prepared from the following raw materials: 252 to 282 parts of moderate-heat anti-cracking cement, 100 to 118 parts of anti-cracking admixture, 235 to 255 parts of phase change sand, 180 to 200 parts of natural sand, 980 to 1020 parts of coarse aggregate, 155 to 170 parts of water and 5 to 7 parts of water reducing agent. The moderate-heat anti-cracking cement is used for replacing ordinary Portland cement, the anti-cracking admixture is used for replacing conventional admixtures such as coal ash mineral powder, and the phase change sand is used for replacing part of natural sand as fine aggregate, so that hydration temperature rise and temperature drop stress of the mass concrete are effectively inhibited; the straw fiber is modified by the modifier, the capability of cellulose and lignin in the straw fiber in participating in cement hydration reaction is excited, the binding power of the fiber and a concrete matrix interface transition area is improved, and waste associated with agricultural products such as straw and chaff can be utilized with high value while the anti-cracking capability of the concrete is improved.

The invention discloses a high-performance lithium ion battery composite diaphragm based on natural desert sand grains and a preparation method of the high-performance lithium ion battery composite diaphragm. Aiming at the technical defects of the traditional polyolefin-based diaphragm, natural desert sand grains are creatively used as a functional coating material, and the composite diaphragm with excellent comprehensive performance is successfully prepared by regulating the particle size of the sand grains to be 75-105 microns, regulating the thickness of the coating to be greater than 210 microns, regulating the coating mode to be single-sided coating and regulating the mass ratio of the sand grains to a binder to be 5: 3. The composite diaphragm fully utilizes the unique natural porous structure and surface characteristics of desert sand grains, and shows excellent thermal stability and electrochemical performance. The first-circle coulombic efficiency of the lithium ion battery applying the diaphragm is improved to gt; meanwhile, the safety and the energy density of the battery are enhanced. According to the invention, the technical concept of treating electricity with sand is realized, an efficient and low-cost new scheme is provided for improving the safety and comprehensive performance of the lithium ion battery, and meanwhile, a new way is opened up for sustainable and high utilization of desert resources.

The invention belongs to the technical field of green building materials, and provides fly ash-based geopolymer concrete and a preparation method thereof. The method provided by the invention comprises the following steps: mixing fly ash, natural sand, a composite activator and water, and sequentially carrying out vibration molding and sealed maintenance on the mixture to obtain the fly ash-based geopolymer concrete. The mixing proportion and the curing process are optimized through orthogonal design, and the compressive strength and the breaking strength of the geopolymer concrete are remarkably improved; the composite activator (6mol / L NaOH solution + 0.4 mol / L Na2SiO3 solution) can effectively promote the depolymerization of aluminosilicate to form compact N-A-S-H gel, so that the strength and durability of the concrete are enhanced; the process is simple, the cost is low, the fly ash can be treated on a large scale, the use amount of cement is reduced, carbon emission is further reduced, and the method conforms to the development trend of green building materials.

The invention belongs to the technical field of building materials, and particularly relates to fan blade regenerated fiber-based high-solid-waste low-carbon concrete and a preparation method thereof, and the fan blade regenerated fiber-based high-solid-waste low-carbon concrete comprises the following raw materials by weight: 0.9-1.1 parts of an alkali-activated active precursor; 0.4 to 0.8 part of iron tailing sand; 0 to 1.1 parts of natural sand; 1.9 to 2.4 parts of recycled aggregate; 0.15 to 0.20 part of a composite alkali activator; 0.015 to 0.020 part of fan blade regenerated glass fiber; 0.001 to 0.003 part of a retarder; 0.35 to 0.45 part of water; wherein the alkali-activated active precursor is granulated blast furnace slag powder. The obtained concrete mixture is good in workability, the 28-day compressive strength reaches 40 MPa or above, the drying shrinkage rate is reduced by 30%-50% compared with that of traditional alkali-activated concrete, additional curing measures are not needed, the concrete mixture is particularly suitable for prefabricated parts such as curbs, sleepers and manhole covers, and a feasible technical path is provided for high-valued and large-scale utilization of bulk industrial solid waste.

The invention discloses an aramid fiber reinforced concrete material for a light sound barrier plate and a preparation method of the aramid fiber reinforced concrete material, and relates to the field of light building materials, and the aramid fiber reinforced concrete material is prepared from cement, fly ash, silica fume, quartz sand, light ceramsite, rubber fine sand, a water reducer, a fiber plasticizer, water and modified aramid fiber. The waste tire rubber powder is heated by using the aqueous alkali to prepare the fine rubber sand, so that exploitation of natural sand can be reduced, and energy conservation and emission reduction are realized. The interface bonding force between the modified aramid fiber and cement and other raw materials is enhanced, the acid and alkali resistance is high, the tensile strength of the concrete material can be improved, and the durability of the concrete performance under complex conditions is guaranteed.

The invention belongs to the technical field of concrete, and particularly provides anti-crack concrete and a preparation method thereof. The anti-crack concrete comprises the following components: cement, water, natural sand, broken stone, fly ash, a polycarboxylic acid water reducing agent, polypropylene fibers, montmorillonite and a core-shell anti-ultraviolet agent. The prepared concrete has the advantages of being high in ultraviolet resistance, excellent in crack resistance, high in durability and the like, and is suitable for outdoor scenes such as building outer walls, bridges and roads.

The present invention provides a multi-solid waste-based artificial stone and a preparation method thereof, comprising the following steps: Step 1 is to uniformly mix iron tailings powder, fly ash, steel slag powder, and water, and then crush and roll to obtain spherical particles; Step 2 is to uniformly mix the spherical particles, steel slag powder, fly ash, cement, an activator, and a reinforcing agent with water to obtain a wet material; Step 3 is to press and shape the wet material, and cure it to obtain the multi-solid waste-based artificial stone. The multi-solid waste-based artificial stone of the present invention utilizes iron tailings, steel slag, and fly ash to prepare the artificial stone, which not only consumes a large amount of various solid wastes, reduces the amount of natural sand mined, reduces the amount of pollutant gas emissions generated by the sintering of cementitious materials, and improves the ecological environment; at the same time, after the action of the activator and reinforcing agent, the artificial stone can quickly undergo a hydration reaction in a short period of time to generate gel products such as silicic acid and aluminic acid, reduce the internal pore structure, and improve the density.

The invention belongs to the technical field of building materials, particularly relates to a preparation method of alkali activator activated fiber reinforced steel slag concrete, and aims to solve the problems that the steel slag concrete is low in early strength, insufficient in toughness and low in industrial solid waste synergistic utilization rate. According to the preparation method disclosed by the invention, a multi-source aggregate system is formed by the hot disintegration treated steel slag, the recycled coarse aggregate, the tailing sand and the natural sand; sodium silicate with the modulus of 1.0-1.5 and sodium carbonate / sodium hydroxide mixed alkali form a composite alkali activator; 1.0%-1.5% of corrugated steel fibers and 0.4%-0.6% of bunchy polypropylene fibers are doped to form a hybrid reinforcing system; the concrete is prepared through aggregate pre-wetting, staged stirring and a standard curing process. According to the method, the early strength and the fracture toughness can be remarkably improved, and efficient resource utilization of various industrial solid wastes is achieved.

The invention discloses a mortar fluidity evaluation model and a mix proportion inverse calculation method thereof, and belongs to the technical field of building materials.The method comprises the steps that aggregate comprehensive characteristic indexes are built by quantifying the stacking density, the specific surface area and grain shape correction parameters of aggregate; based on a cement paste volume balance principle, establishing a paste film thickness quantification model containing aggregate gap filling and surface wrapping; accurate evaluation of the fluidity is realized through a correlation model of the slurry film thickness and the mortar fluidity; and finally, based on the target fluidity, reversely deducing to obtain mortar mixing ratio parameters (water-cement ratio, mortar-sand ratio and the like) meeting the requirements. The method solves the problems that the traditional method cannot quantify the multi-feature coupling influence of the aggregate, the fluidity evaluation error is large, and the mix proportion design depends on experience, realizes the accurate prediction of the mortar fluidity and the efficient back-stepping of the mix proportion, is suitable for various aggregates such as natural sand, machine-made sand, shaping sand and the like, and provides a scientific basis for the mortar engineering application.

The invention relates to the technical field of building materials, and particularly discloses anti-crack bare concrete. The anti-cracking bare concrete is prepared from the following raw materials in parts by weight: 320 to 340 parts of cement, 48 to 52 parts of stone powder, 9 to 11 parts of silicon powder, 43 to 47 parts of an anti-cracking agent, 720 to 740 parts of natural sand, 730 to 750 parts of granite macadam with the particle size of 10 to 20 mm, 290 to 310 parts of granite macadam with the particle size of 5 to 10 mm, 150 to 160 parts of water and 9 to 11 parts of a polycarboxylate superplasticizer. Wherein the anti-cracking agent is prepared from the following raw materials: carbon nanofibers, phase change microcapsules, an ethylene-tetrafluoroethylene copolymer, hyperbranched polyester, a silane coupling agent and a nano silicon dioxide dispersion liquid. The anti-crack fair-faced concrete can be used for engineering scenes with requirements for apparent quality and durability, and has the advantages of long-acting crack resistance, high anti-permeability grade and excellent volume stability.

The utility model relates to the technical field of curbs, and discloses a high-quality sand-permeable horizontal curb which comprises a fabric layer, a base layer, an anti-collision buffer strip, an anti-freezing layer and a connecting rod, the fabric layer is fixed on the outer side of the base layer, the fabric layer is composed of modified epoxy resin and granite particles, an arc-shaped top is arranged at the top of the fabric layer, and the anti-collision buffer strip is arranged at the bottom of the arc-shaped top. An anti-freezing layer is fixed at the bottom of the base layer and is made of foam concrete, a plurality of first water-permeable holes are formed in the base layer, a plurality of second water-permeable holes are formed in the anti-freezing layer, the first water-permeable holes are aligned with the second water-permeable holes, and an anti-collision buffer strip is fixed on each of two side edges of the top of the fabric layer. The two ends of the connecting rod are each fixedly provided with two elastic blocking pieces, the elastic blocking pieces are made of spring steel, and the two ends of the base layer are each provided with a clamping groove used for allowing the connecting rod to be inserted. According to the utility model, mutual connection is stable; water permeability and drainage performance are good; the anti-collision performance and the anti-freezing performance are good.

The invention relates to the technical field of preparation of concrete, in particular to LC3-basalt fiber regenerated block concrete and a preparation method thereof.The preparation method comprises the following preparation steps that S1, LC3 cement, regenerated blocks, natural sand and gravel are poured into a stirrer to be subjected to uniform dry mixing, and a dry mixture is obtained; s2, adding water, a modified water reducer and a performance modifier into the dry mixture, performing wet mixing, uniformly scattering modified basalt fibers during wet mixing, and performing uniform stirring to obtain a wet mixture; and S3, pouring the wet mixture into a test mold, standing at room temperature, demolding, and curing for 26-28 days to obtain the LC3-basalt fiber regenerated block concrete. Through the synergistic effect of the modified basalt fiber, the modified water reducer and the performance modifier, the compressive strength, the strength retention rate after high temperature and the tensile strength of the concrete are remarkably improved, and chemical activation and densification after the regenerated block is added are achieved.

The invention relates to the technical field of building materials, and particularly discloses an anti-freezing concrete prefabricated part and a preparation method thereof, the anti-freezing concrete prefabricated part comprises the following raw materials by weight: 300-360 parts of cement, 40-60 parts of fly ash, 90-110 parts of mineral powder, 642-662 parts of natural sand, 1000-1100 parts of gravel, 7-9 parts of an additive, 150-170 parts of water, 0.5-1.5 parts of polypropylene glycol fiber, and 3-8 parts of phase change self-repairing microcapsules. The prepared anti-freezing concrete prefabricated part has the advantage of being good in anti-freezing performance.

The invention relates to the technical field of building materials, in particular to halloysite sea sand geopolymer mortar as well as a preparation method and application thereof. The halloysite sea sand geopolymer mortar is prepared from the following raw materials in parts by weight: 500 parts of a cementing material, 140 to 280 parts of natural sand, 420 to 560 parts of sea sand, 203 parts of an alkali activator, 1 part of halloysite nanotubes and 46 to 48 parts of water. The preparation method comprises the following steps: ultrasonically dispersing halloysite nanotubes in half of mixing water; mixing and stirring the alkali activator and the cementing material to prepare slurry; adding natural sand and sea sand, and stirring; and finally, adding the halloysite dispersion liquid and the residual water and stirring. And molding, vibrating and curing the obtained mixture to obtain a finished product. Through the synergistic effect of the halloysite nanotubes and the geopolymer system, on the premise that the sea sand is not desalted, high-proportion resource utilization of the sea sand is achieved, and the prepared mortar has excellent mechanical properties and chloride ion penetration resistance and is especially suitable for coastal and island engineering construction.

The invention relates to a preparation method of environment-friendly high-toughness concrete and a layered pouring process, and belongs to the technical field of building materials. The preparation method comprises the following steps: firstly, modifying steel fibers by using a self-made quaternization corrosion inhibitor, sodium silicate and an ethanol solution, and then stirring the modified steel fibers, Portland cement, rubber, natural sand and first-grade gravel to obtain a prefabricated material; finally, a polycarboxylic acid water reducing agent, an air entraining agent and an expanding agent are prepared into a solution, the solution is poured into the prefabricated material, stirring and mixing are conducted, and the environment-friendly high-toughness concrete is obtained.The modified steel fiber prepared through the preparation method has a better corrosion inhibition effect and has good bonding performance with the concrete; the mechanical property of the finally prepared concrete is effectively improved.

The invention provides a multi-solid-waste-based artificial stone and a preparation method thereof.The preparation method comprises the following steps that 1, iron tailing powder, fly ash, steel slag powder and water are mixed to be uniform and then rolled, and spherical particles are obtained after rolling; 2, uniformly stirring the spherical particles, steel slag powder, fly ash, cement, an exciting agent, a reinforcing agent and water to obtain a wet material; and step 3, carrying out compression molding on the wet material, and curing to obtain the multi-solid-waste-based artificial stone. The multi-solid-waste-based artificial stone disclosed by the invention is prepared from the iron tailings, the steel slag and the fly ash, so that a large amount of various solid wastes are consumed, the mining quantity of natural sand is reduced, the emission of pollution gas generated by sintering a cementing material is reduced, and the ecological environment is improved; meanwhile, after the artificial stone is subjected to the action of the exciting agent and the reinforcing agent, the artificial stone can be rapidly subjected to hydration reaction in a short time to generate gel products such as silicic acid and aluminic acid, the internal pore structure is reduced, and the compactness is improved.

To provide an Eutrema japonicum growing device that does not require a mechanism for removing or sterilizing pathogenic bacteria in the water circulation system.SOLUTION: An Eutrema japonicum growing device A comprises growth tanks 2A, 2B located in an indoor water circulation system 1. The growth tanks 2A, 2B have cultivation beds for growing Eutrema japonicum. The cultivation beds are made by spreading water-crushed slag from a waste melting furnace, which is obtained by melting municipal or industrial waste in a waste melting furnace at high temperatures of 1200°C or higher, crushing the resulting molten material with water, magnetically separating the material to reduce the metallic iron content to 1 mass% or less, and then adjusting the particle size; or a mixture containing more than 50 mass% of the water-crushed slag from a waste melting furnace, the remainder being natural sand that has been heated and washed for sterilization. An LED lighting 3 for growth illumination and a UV lighting 4 for sterilization illumination are installed in positions within the growth tanks 2A, 2B where they can illuminate the Eutrema japonicum.SELECTED DRAWING: Figure 1

The invention discloses machine-made sand UHPC capable of being used for producing a precast concrete formwork and a preparation method of the machine-made sand UHPC, and belongs to the technical field of construction engineering material preparation. Comprising the following raw materials in parts by weight: 650 to 850 parts of cement, 70 to 120 parts of slag powder, 30 to 60 parts of silica fume, 80 to 140 parts of microbeads, 1100 to 1400 parts of machine-made sand, 30 to 50 parts of steel fibers, 15 to 20 parts of a water reducing agent, 0.8 to 1.5 parts of sodium gluconate, 0.3 to 0.6 part of a defoaming agent and 165 to 200 parts of mixing water. The machine-made sand is used for replacing traditional natural sand / carborundum, the cost is reduced, and raw materials are easy to obtain; the workability and the mechanical property of the machine-made sand are improved through cooperation of the water reducing agent, the microbeads and the defoaming agent, and the workability is prolonged through sodium gluconate; the compactness and durability of the concrete are improved through the slag powder and the micro-silicon powder, the overall proportion is scientific, and prefabricated concrete formworks can be efficiently produced in batches.

The application discloses a preparation method of mixed recycled aggregate concrete and the mixed recycled aggregate concrete. The preparation method comprises the following steps: preparing the mixed recycled aggregate concrete by using cement, mixed recycled aggregate, mixed sand, fly ash and an additive; the mixed recycled aggregate is prepared by mixing recycled aggregate and virgin aggregate; the mixed sand is prepared by mixing recycled fine particles and natural sand; and the mortar is prepared by using the mixed sand. The mass proportion of the recycled aggregate in the mixed recycled aggregate, the non-uniform coefficient of the mixed recycled aggregate, the grading coefficient and the void ratio of the mixed recycled aggregate are limited, so that the reasonable range of the non-uniform coefficient and the grading coefficient of the mixed recycled aggregate with large bulk density and small void ratio is determined, and the mixed sand is filled correspondingly, so that the mixed recycled aggregate concrete with high strength is prepared, the mixed recycled aggregate concrete replaces the pouring material of the high-performance concrete structure, and the application range of the recycled aggregate concrete is greatly widened.

This invention relates to a method for recovering coarse-grained fluidized bed flotation tailings from molybdenum ore, belonging to the field of molybdenum tailings recovery technology. It addresses at least one of the following problems: existing methods cannot fully utilize coarse-grained tailings in building materials and solve the problem of stockpiling; existing methods require natural sand and gravel aggregates in the tailings-to-building process; comprehensive utilization is difficult; and tailings maintenance costs are high. The method of this invention uses coarse-grained tailings as the main raw material. By classifying tailings of different particle sizes, it coordinates with slag, fly ash, and other solid wastes to prepare high-strength concrete. This not only achieves full-scale comprehensive utilization of coarse-grained tailings but also promotes the high-efficiency utilization of other solid wastes, avoids the use of natural sand and gravel aggregates, and reduces tailings maintenance costs. It is of great significance for improving resource utilization efficiency and the sustainable development of the mining industry.

The application discloses a kind of full-automatic sandstone moisture content online detection method based on intelligent algorithm, comprising the following steps: S1, determine the multiple key features of the influence sandstone moisture content value;S2, the current value of each key feature is collected by acquisition equipment;S3, the moisture content preliminary prediction value of the natural sand for current production concrete is obtained by deep extreme limit learning machine;S4, the moisture content preliminary prediction value obtained in step S3 is corrected, and the moisture content correction prediction value is obtained;S5, the moisture content of the natural sand for current production concrete is measured by moisture content detection sensor to obtain the moisture content determination value;S6, the moisture content correction prediction value obtained in step S4 is fitted with the moisture content determination value obtained in step S5, and the moisture content determination value is obtained.The application adopts multiple intelligent algorithms to correct the moisture content determination value determined by sensor, and effectively improves the measurement accuracy of sandstone moisture content online detection.

To aim to effectively utilize components with phosphorus adsorption functions to efficiently, that is, with good yield, control the size of the resulting adsorption composite particles, ensure that there are no adsorption materials that do not contribute to internal adsorption, achieve cost-effectiveness, and obtain phosphorus adsorption composite particles with sufficient strength.SOLUTION: A coating layer made of a binder is applied to the surface of granular carriers, and an adsorbent is arranged on this coating layer to form adsorbent composite particles. As the granular carrier, natural sand or artificial sand can be used. As the binder, cement selected from Portland cement, blended cement, or special cement can be used. As the adsorbent, a material capable of adsorbing phosphorus components can be used.SELECTED DRAWING: None

This utility model relates to the field of paving brick technology and discloses a high-quality permeable paving brick made of natural sand, including a permeable skeleton layer, a bottom layer of high-quality natural sand permeable paving bricks at the bottom of the permeable skeleton layer, and a top layer of high-quality natural sand permeable paving bricks at the top of the permeable skeleton layer. In use, the corresponding conical drainage channels and through holes are coaxial and connected, achieving dual-effect permeability through siphoning and flushing. When water flows through the surface layer of the high-quality natural sand permeable paving bricks, the conical drainage channels increase the flow velocity and generate negative pressure suction. When the water flow is large, a high-speed jet forms in the channels to flush away sediment. The bricks are arranged in a honeycomb pattern during laying, and the corresponding arc-shaped male tenons and arc-shaped female tenons form an interlocking structure. The curved joints can automatically level the angle, and the interlocking structure increases the effective permeable joint width, thus improving permeability. The drainage channels in the interlocking area can form a dual drainage channel with the vertical infiltration holes.

The present invention discloses a high-temperature ultra-high-strength ceramic aggregate geopolymer mortar and its preparation method, belonging to the field of building materials technology. The geopolymer mortar comprises the following raw materials, by weight: 193 parts metakaolin, 450 parts fly ash, 249 parts potassium water glass solution, 1280-1290 parts ceramic aggregate, and 86 parts water. This invention uses optimized graded ceramic waste as an alternative aggregate to natural sand, effectively treating ceramic waste while significantly enhancing the high-temperature mechanical properties of the geopolymer mortar.

The invention relates to the technical field of mortar and concrete preparation, in particular to a coal-fired furnace slag modification method and application thereof. According to the invention, the slag is subjected to crushing and screening, moisture content control, pore pre-filling of the fly ash-cement mixture, water addition and pre-mixing and coating, and modification treatment, such that the porosity of the slag is reduced, the fluidity of the slag is improved, and the mechanical property of the slag is significantly improved. Besides, the slag subjected to modification treatment is applied to production of mortar and concrete, 100% replacement of natural sand by the slag can be realized, the compressive strength of the mortar and the concrete can be greatly improved, and remarkable environmental protection and economic benefits are achieved.