422 results about "Stone dust" patented technology

The invention discloses a plastic floor base material prepared from recycled PET, and relates to the technical field of floors, the base material is prepared by mixing a recycled PET material, stone powder, a chain extender, stearic acid, an oil body and an elastomer, the recycled PET material accounts for 15%-25%, the stone powder accounts for 65%-78%, the chain extender accounts for 0.4%-1%, the stearic acid accounts for 0.5%-2%, and the oil body accounts for 1%-3%. According to the present invention, the recycled PET is adopted as the adhesive to adhere the stone powder, and extrusion molding is performed through the extruder to prepare the plastic floor base material, such that the GRS and SCS certified products can be easily obtained, the PET product cannot be decomposed into the chlorine gas and the hydrogen chloride with the pungent odor like the conventional PVC plastic floor base material, and the recovered PET material has the more sources, such that the production cost is low, and the production efficiency is high. And the market is wider.

The invention relates to a concrete composition, concrete as well as a preparation method and application of the concrete. The concrete composition comprises the following components: coal gangue aggregate, a gel material and a water reducing agent, the coal gangue aggregate comprises crushed coal gangue, a coarse coal gangue material and coal gangue stone powder, and the average particle size of the coarse coal gangue material is larger than that of the coal gangue stone powder and smaller than that of the crushed coal gangue; the gel material comprises slag, gypsum and carbide slag. According to the concrete composition, the coal gangue of different grades is adopted as the aggregate and compounded with the gel material and the water reducing agent to prepare the concrete, all the raw materials have a synergistic effect, the durability, workability, crack resistance and other performance of the concrete are improved, the production cost is reduced, and the requirement of coal mine construction for high-performance concrete is met.

The invention discloses an intelligent adjusting type stone powder screening device, and belongs to the technical field of stone powder screening, the intelligent adjusting type stone powder screening device comprises an outer shell, a plurality of screening drums are connected to the interior of the outer shell from top to bottom, and vibration assemblies are arranged at the bottoms of the screening drums. According to the stone powder screening device, by arranging the dispersing and discharging assembly, stone powder accumulated unevenly in the screen drum can be spread and dispersed, on one hand, the situation that the screening effect is affected due to mutual stacking and shielding of stone powder particles can be avoided, on the other hand, the evenly-spread stone powder can make contact with all the screen holes of the screen drum to the maximum extent, the screening area is increased, and therefore the screening efficiency is improved; meanwhile, a connecting ring drives a discharging auger to rotate through a first gear and a fixed gear ring, so that the discharging auger can convey residual stone powder on the screen drum to the peripheral side of the screen drum, and the residual stone powder can be discharged through a discharging pipe in cooperation with uniform spreading, scraping and sweeping of a dispersing roller, so that the discharging speed of the device is increased, accumulation of the residual stone powder can be avoided, and the working efficiency of the device is improved. The screening efficiency is improved.

The invention discloses a preparation process and application of a modified anti-segregation admixture for machine-made sand, and relates to the technical field of polymer modified materials. Modified polyoxyethylene ether and vinyltrimethoxysilane are adopted to construct a steric hindrance effect, styrene-acrylate emulsion is introduced to form an interpenetrating network structure, and nano silicon dioxide and bentonite are cooperated to construct a multi-scale enhancement system. Silane coupling agent hydrolysis and nano grafting reaction are realized through gradient heating, and the particle size distribution D90 of the emulsion is less than or equal to 5 microns by combining an ultrasonic-mechanical synergistic emulsification process. A three-dimensional network is formed by the composite thickening agent and anhydrous sodium sulfate, and after in-situ curing at 25 DEG C with RH greater than or equal to 80%, 0.1-0.5% of the additive is added, so that the slump retention value of the machine-made sand concrete is greater than 315mm (1h), the pressure bleeding rate is less than or equal to 9.7%, the 28d compressive strength is improved by 24.5-72.6 MPa, and the segregation resistance coefficient is reduced to 0.08-0.11. The technology breaks through the limitation of insufficient adaptability of traditional admixtures to machine-made sand, and is particularly suitable for long-distance pumping construction of high-stone-powder-content machine-made sand concrete.

The utility model relates to an efficient and environment-friendly machine-made fine sand production system which comprises a bar type feeder, a screen feed opening of the bar type feeder is connected to a linear vibrating screen I, and a screen feed opening of the bar type feeder is connected to a jaw crusher; a feed opening of the jaw crusher and an oversize feed opening of the linear vibrating screen I are connected to the intermediate crushing cone crusher, and a feed opening of the intermediate crushing cone crusher is connected to the linear vibrating screen II; screen discharge ports of the linear vibrating screen I and the linear vibrating screen II are connected to a trough type sand washer, a clean sand outlet of the trough type sand washer is connected to a rod mill, and a discharge port of the rod mill is connected to a high-frequency dewatering screen. A slurry outlet of the groove type sand washer and a slurry opening of the high-frequency dewatering screen are sequentially connected to a high-efficiency thickener and a plate-and-frame filter press. The dry-wet combined sand making process system is high in sand forming rate, quality indexes such as mud content, water content, grading and stone powder content of finished product sand can be well controlled in the sand making process, and the quality of finished product machine-made fine sand is improved.

The invention discloses composite paste slurry suitable for pretreatment of a pier pile foundation in a karst area and a preparation method and a grouting method of the composite paste slurry, the composite paste slurry is based on the filling design of part of a karst cave but not the whole karst cave, cement, slurry, stone powder and a composite additive are prepared into semi-solid slurry with the slump of 5-10 cm, and the composite paste slurry has underwater anti-dispersion performance, the composite admixture is composed of a first admixture and a second admixture in a mass ratio of 1: 1; each cubic meter of the composite paste slurry comprises the following components by mass: 200 to 300 kg of cement, 550 to 780 kg of slurry and 820 to 1200 kg of stone powder, and the addition amount of the first additive and the second additive is 0.6 to 1% of the weight of the cement. The problems that when an existing pretreatment grouting technology is used for treating the karst problem of the bridge pier, the number of drilled holes is large, the reinforcing effect is common, cost is high, the environment is polluted, and adaptability to complex geology is insufficient are solved.

The invention relates to the field of concrete design, and particularly discloses stone powder-containing machine-made sand concrete and a corresponding mix proportion design method. The method comprises the steps that the use amount of coarse aggregate, fine aggregate and a cementing material of concrete is calculated, the fine aggregate stone powder-containing machine-made sand is subjected to rapid screening, the stone powder content of the fine aggregate stone powder-containing machine-made sand is measured, all the stone powder-containing machine-made sand is counted into the cementing material, part of cement, fly ash and mineral powder are replaced, a cementing system is formed, 10%-20% of the cement is replaced with the cement, and the remaining part of the cement is replaced with the fly ash and the mineral powder; calculating a strength influence coefficient under the specific cement replacement ratio of the stone powder by adopting a formula gamma Lf =-3.16 x-0. 048 x + 1, and calculating the mortar strength of the gelling system according to the strength influence coefficient; and adjusting and determining the water consumption meeting the preparation strength requirement, and finally determining the dosage of each component of the concrete. The stone powder in the powder-containing machine-made sand serves as a gelling component, efficient resource utilization of the machine-made sand with the high stone powder content is achieved, the use amount of cement and coal ash is reduced, and the problem that concrete is not low in carbon for a long time is solved.

The present invention discloses a method for preparing an acidic soil conditioner from mine waste stone powder, as well as its product and application. The preparation method includes: S1: mixing the mine waste stone powder with an adhesive, granulating and post-treating to obtain stone powder particles; S2: placing waste shells and aquatic product leftovers in an acidic solution, standing for activation, washing to neutrality and then drying for standby; S3: performing high-temperature carbonization and expansion treatment on the product dried in step S2 in an anoxic or oxygen-free environment to obtain biochar; S4: uniformly mixing the stone powder particles prepared in step S1, the biochar prepared in step S3, waste shells, livestock manure, potassium humate and auxin to obtain an acidic soil conditioner. The preparation method disclosed by the present invention uses mine waste stone powder, waste shells and aquatic product leftovers as raw materials, which can not only effectively improve soil problems, solve the problem of waste of waste resources, turn waste into treasure, but also will not cause secondary harm to the soil environment.

The utility model relates to a production line for preparing machine-made sand by using construction waste, which comprises a raw material crushing system, a screening system and a sand making system, and the raw material crushing system sequentially comprises a plate chain feeder, a jaw crusher and an impact crusher; the screening system comprises a first vibrating screen and a second vibrating screen, raw materials crushed by the impact crusher are conveyed to the first vibrating screen, the first vibrating screen is connected with a first aggregate bin and the second vibrating screen, and the second vibrating screen is connected with different second aggregate bins; the sand making system sequentially comprises a shaping sand making machine, a third vibrating screen and a powder selecting system, the shaping sand making machine is respectively connected with the first aggregate bin and the second aggregate bin, finished product machine-made sand and stone powder are selected through the powder selecting system, and the stone powder is conveyed to the powder bin.

The invention relates to the technical field of tunnel construction materials, and discloses a low-carbon impervious synchronous grouting material for a shield tunnel and a preparation method thereof.The low-carbon impervious synchronous grouting material for the shield tunnel is mainly composed of a low-carbon composite cementing material, fine aggregate, water and an additive, wherein the mass ratio of the low-carbon composite cementing material to the fine aggregate is 0.1-0.6, and the addition amount of the additive does not exceed 0.5%. According to the synchronous grouting material for the low-carbon anti-seepage shield tunnel and the preparation method of the synchronous grouting material, the synchronous grouting material for the low-carbon anti-seepage shield tunnel is prepared through a multi-solid-waste synergistic excitation enhancement technology, recycling of solid waste is achieved, multi-source solid waste such as cement, steel slag powder, mineral powder and fly ash is adopted for synergistic compatibility to prepare a low-carbon composite cementing material, and the low-carbon anti-seepage shield tunnel is good in comprehensive performance. The mechanical property of the synchronous grouting material can be improved, waste concrete or decoration waste is cooperatively adopted as the fine aggregate, the compactness of synchronous grouting can be improved through the stone powder content, and the anti-permeability performance is excellent.

The invention discloses a mine high and steep slope ecological restoration integrated system based on double-response gel and an ecological restoration method. The system comprises a three-channel rotational flow mixing bin, a pulse atomization spraying device and an AI visual control system, gradient spraying of erosion-resistant, nutrition and water-retention three-level matrixes is achieved, pulse atomization and YOLO-v8 driven crack recognition are matched, and the problem of'jet flow attenuation 'of a slope with the angle being 70 degrees or above in a traditional process is solved. The method comprises the following steps: preparing a pH-temperature double-response sodium alginate-chitosan gel seed bag, spraying according to a sequence of 10-15cm of a water retention layer, 20-40cm of a nutrition layer and 10-20cm of an anti-erosion layer, and performing multispectral inspection by using an unmanned aerial vehicle to realize dynamic maintenance. The matrix system takes stone powder porous particles, activated fly ash and other solid wastes as raw materials, the resource utilization rate of mine solid wastes is effectively improved, and the matrix system is suitable for repairing complex slopes in coastal areas, volcanic rocks, cold areas and the like.

The invention relates to the technical field of asphalt concrete production, in particular to a bag-type dust remover for stone dust recycling, which comprises a dust removal bin, a pattern plate is fixedly mounted on the upper side in the dust removal bin, a plurality of mounting holes are formed in the pattern plate, dust removal bags and a bag cage are mounted in the mounting holes, and an air outlet cylinder is rotatably mounted in the bag cage. A plurality of expansion units which are uniformly arranged up and down are mounted on the outer side of the air outlet cylinder, expansion rings are mounted on the expansion units, and the expansion rings are fixedly connected with the cloth bag cage; through radial expansion and retraction of the expansion ring, a hardened layer on the surface of the filter bag can be effectively broken, meanwhile, the subsequent pulse back-blowing dust removal effect is improved, and the dust recovery efficiency is ensured; when the dust collection bag is locally damaged, the dust collection bag can prevent dust-containing air flow from flowing out through the air outlet cylinder, so that the dust collection bag can still maintain a normal filtering function in other areas except the damaged position, thereby reducing environmental pollution and ensuring the dust collection efficiency.

The invention belongs to the technical field of building materials, and provides a baking-free brick and a production process thereof, the baking-free brick comprises the following raw materials: 58-62% of industrial waste residue, 2.5-3.5% of stone nitrate, 8-10% of cement, 2.8-3.5% of quick lime, 0.15-0.25% of ash powder, 0.18-0.22% of JFS activator, and the balance of water; industrial solid waste resources are effectively utilized, energy consumption and production cost are reduced, exciting agent ions are promoted to diffuse to stone powder lattice defect sites through the steam heat effect, a nano water film enhances solid-liquid interface ion exchange, the material reaction activity index is remarkably increased, high-temperature sintering is not needed, and the requirement for green building material development is met; the environmental pollution is reduced.

The invention relates to the technical field of building materials, in particular to a coal gasification slag enhanced alkali-activated environment-friendly ceramic tile adhesive and a preparation method thereof. The invention provides a coal gasification slag enhanced alkali-activated environment-friendly ceramic tile adhesive, which is prepared from the following components in parts by mass: 30 to 50 parts of active silicate powder, 5 to 10 parts of an enhancer, 0.1 to 0.3 part of a water reducing agent, 0.03 to 0.05 part of a smoothing agent, 5 to 10 parts of stone powder, 0.09 to 0.15 part of cellulose, 3 to 5 parts of rubber powder, 60 to 100 parts of fine aggregate and 10 to 20 parts of an exciting agent, wherein the reinforcing agent is modified coal gasification slag powder. According to the environment-friendly ceramic tile adhesive, cement is replaced by the alkali-activated material, the raw materials are green and environment-friendly, and the environment-friendly ceramic tile adhesive has the advantages of quick setting and hardening and high early strength, is smooth and labor-saving in construction, and has excellent bonding strength in different scenes.

The invention relates to the technical field of sintered ore production, in particular to a sintering mixture and a preparation method thereof.According to the method, a large proportion of iron-containing dust sludge is adopted as a raw material to prepare the sintering mixture, and the sintering mixture comprises mixed iron-containing dust sludge, iron ore concentrate, fine ore, coke powder, magnesite powder and slaked lime powder; the mixed type iron-containing dust mud comprises blast furnace gas mud, converter mud and sintering machine tail dedusting ash, and the weight percentage content of the blast furnace gas mud, the converter mud and the sintering machine tail dedusting ash is 20%-25%: 8%-15%: 65%-70%. The method has the beneficial effects that the problems that the sintering mixture is poor in strength and unreasonable in particle size composition due to the fact that the iron-containing dust mud is directly used as the raw material for preparing the sintering mixture, and the yield and quality of sintered ore are deteriorated are solved.

The invention belongs to the field of preparation of road base materials, and relates to a method for preparing a road base material from a ternary solid waste cementing material and waste stone powder, which comprises the following steps: mixing fly ash, slag and carbide slag according to a mass ratio of (1-2): (4-5): (4-5) to form an FKD cementing material; uniformly mixing the dried waste stone powder with an FKD cementing material and water according to a water-cement ratio of 1.0; wherein the doping ratio of the FKD cementing material is 5%-30%; the uniformly stirred mixture is divided into three layers to be filled into a test mold, each layer is tamped, and the surface layer is subjected to chiseling treatment after each time of tamping; and putting the sample into a standard curing box, curing for 24 hours, demolding, and continuously curing to a set age. The strength of the prepared road base material is higher than that of a cement road base material of the same age, the utilization rate of the waste stone powder and the industrial waste residues is increased, the cost is reduced, and the road base material is environmentally friendly and conforms to the green development concept.

The invention belongs to the technical field of ceramics, and particularly relates to a light glazed ceramic large brick and a preparation method thereof. The light glazed ceramic large brick is composed of a blank body layer, a ground coat layer and a surface glazed layer, wherein the blank body layer is prepared from the following components in parts by weight: 35-42 parts of kaolin, 25-30 parts of argil, 8-12 parts of cordierite, 10-15 parts of quartz, 5-9 parts of aluminum oxide, 4-9 parts of potassium feldspar and 1-3 parts of a binder; the ground glaze layer is prepared from the following components in parts by weight: 25-37 parts of potassium feldspar, 15-20 parts of calcined talc, 15-20 parts of frit, 10-25 parts of quartz, 8-10 parts of calcite, 5-10 parts of zirconium silicate and 5-8 parts of calcined zinc oxide; and the surface polishing glaze is prepared from the following components in parts by weight: 30-40 parts of frit, 20-30 parts of clay, 15-22 parts of albite, 10-15 parts of zinc oxide, 10-15 parts of stone powder and 8-13 parts of kaolin. Meanwhile, according to the preparation method of the large ceramic brick, a low-temperature fast firing technology is adopted, the sintering performance of the large ceramic brick is improved, the strength and hardness of the large ceramic brick are improved, and the large ceramic brick is safe, firm and not prone to breakage when bearing certain pressure or impact force.

The invention discloses a technical method of a lean magnetite dry-discarded tailing recleaning recovery process, and relates to the technical field of iron ore recovery. The technical method of the lean magnetite dry-discarded tailing recleaning and recycling process is characterized by comprising the following specific operations: S1, stacking coarse tailings at one place; s2, adding the coarse tailings obtained in the step S1 into a vertical shaft crusher; s3, the materials obtained in the step S2 are added into a double-layer efficient fine powder sieve, then the materials with the particle size being 0-6 mm serve as stone powder to be subjected to the step S4, the materials with the particle size being 6-16 mm serve as melon seed slices to be subjected to the step S5, the materials with the particle size being larger than 30 mm serve as medium four stones to be subjected to the step S6, and if other materials exist, the materials with the particle size being larger than 30 mm serve as medium four stones to be subjected to the step S6. According to the lean magnetite dry-discarded tailing recleaning and recycling process technical method, existing coarse tailing (0-30 mm) building material products are subdivided, and the standard of mainstream building material products in the market is met; and fine-fraction (0-6 mm) fine ore resources in the coarse tailings are subjected to re-separation and recovery, so that the metal loss is reduced, and the metal recovery rate is increased.

The invention relates to the technical field of roadbeds, and discloses a semi-filled and semi-excavated roadbed for flow-state solidified soil pouring construction in a mountainous area, the semi-filled and semi-excavated roadbed comprises an excavation area and a filling area which are formed by excavating a side slope soil body, and an inner side roadbed is formed at the bottom of the excavation area; the filling area is provided with a plurality of steps which are arranged in an upward opening mode, and a continuously-arranged pouring interface is formed. The filling area is filled with a filling soil layer, an outer side roadbed is formed at the top, and the outer side roadbed and the inner side roadbed are flush and butted to form a roadbed; the filling soil layer is formed by pouring and solidifying flow-state solidified soil, the flow-state solidified soil is formed by stirring and mixing an excavated soil body, a curing agent and a water body, and the curing agent comprises superfine slag powder, coal ash, waste gypsum, water glass, stone powder slag and furnace slag; the slope soil body contains clay minerals, the flow-state solidified soil and the clay minerals are subjected to chemical reaction, so that the pouring interface and the filling soil layer are combined into a whole, the problem that the interface combination between the filling area and the excavation area is not tight is effectively solved, and therefore the overall stability of the roadbed is enhanced.

The invention discloses a microwave-assisted energy-saving method for preparing vaterite by micro-bubble mineralization regeneration of waste stone powder, and belongs to the field of high-added-value resource utilization of solid wastes. The method comprises the following steps: mixing waste stone powder and iron-rich sludge, preheating, carrying out microwave-assisted heating, activating the waste stone powder, and pyrolyzing the iron-rich sludge into an iron-carbon material to obtain a mixed material; mixing the mixed material with a leaching agent for digestion, separating out the iron-carbon material in the digestion process, and adjusting the pH value to remove impurities; and injecting flue gas generated by heating into the digested solution in a micro-nano bubble form, stirring, adding a crystal form regulator, and reacting to obtain vaterite. According to the method, the waste stone powder and the iron-rich sludge are co-treated in a microwave-assisted pyrolysis manner, the treatment scale is large, the iron-rich sludge is carbonized, the surface iron minerals are modified, a high-energy wave-absorbing point is formed, the energy consumption is low, the obtained micro-nano vaterite and the iron-carbon material have great additional values, the product performance is good, and zero carbon emission is realized in the whole process.

The invention belongs to the technical field of high-entropy materials, and discloses high-entropy pyrochlore ceramic as well as a preparation method and application thereof. The chemical formula of the high-entropy pyrochlore ceramic is (La0. 2Nd0. 2Sm0. 2Gd0. 2Er0. 2) 2M2O7, M is Zr, Hf, Ti or Sn, lanthanum oxide, neodymium oxide, samarium oxide, gadolinium oxide, erbium oxide and zirconium oxide or hafnium oxide or titanium oxide or tin oxide are sintered at the temperature of 1400-1600 DEG C to synthesize high-entropy pyrochlore powder, the high-entropy pyrochlore powder is mixed with tin chloride, ball-milled and dried to obtain mixed powder, the mixed powder is mixed with a surfactant, the mixed powder is mixed at the temperature of 200-400 DEG C, ball-milled and dried, and the high-entropy pyrochlore ceramic is obtained. And carrying out cold sintering under the pressure of 200-500MPa, and then carrying out vacuum sintering at the temperature of 1300-1600 DEG C, thereby obtaining the The high-entropy pyrochlore ceramic disclosed by the invention is high in purity, high in density, excellent in mechanical property and leaching resistance, low in sintering temperature and short in heat preservation time, and has an application prospect in the field of nuclear waste curing.

The invention relates to a concrete mix proportion design method based on machine-made sandstone powder, and relates to the technical field of concrete preparation, and the method comprises the following steps: according to a selected cementing material and the content of stone powder screened from machine-made sand, calculating to obtain a stone powder excess value; acquiring a mix proportion parameter of the reference concrete and the strength of the reference concrete; the excess stone powder in the machine-made sand is used as an inert mineral admixture, and the amount of cement replaced by the stone powder is calculated according to the substitution coefficient gamma c and the excess value of the stone powder; and testing the water demand ratio of the stone powder, and calculating to obtain the final water consumption of the concrete. The resource comprehensive utilization rate of the high-stone-powder-content dry-process machine-made sand can be increased, and the cement consumption is reduced.

The invention relates to the technical field of building materials, in particular to flow-state solidified soil as well as a preparation method and application thereof. The flow-state solidified soil comprises the following components in percentage by mass: 50%-60% of muck, 35%-40% of water and 5%-13% of a curing agent, wherein the curing agent is prepared from the following components in parts by weight: 5 to 25 parts of cement clinker, 25 to 50 parts of superfine slag powder, 10 to 25 parts of fly ash, 10 to 20 parts of waste gypsum, 10 to 20 parts of mountain flour slag, 1 to 3 parts of anti-dispersing agent and 1 to 5 parts of water reducing agent. According to the invention, the defect that the plugging effect is poor when cement paste is used as a drilling hole exploration plugging agent at present can be improved.

The invention belongs to the technical field of civil engineering materials, and particularly relates to stone powder and nano material synergistically modified bubble light soil and a preparation method thereof. The light soil comprises the following raw materials: cement, stone powder, water, a foaming agent, a composite alkali activator consisting of NaOH and water glass, and a hydrophilic / hydrophobic nano SiO foam stabilizer. The preparation method comprises the step of mixing, pouring and curing the alkali-activated slurry and the nano stable foam. According to the invention, stone powder activity and foam stability can be synergistically improved, high mixing amount (up to 30%) of stone powder is realized, and low density, high strength and high environmental protection benefit are achieved at the same time.

The application is a kind of stone powder sorting system, including feeding equipment, feeding equipment is feeding for slurry preparation equipment, the stone block outlet of slurry preparation equipment is transported to the temporary storage yard through the belt conveyor, the first screening equipment is connected with the ore slurry liquid outlet, the sand outlet of the first screening equipment is connected with the first spiral dewatering equipment, the first spiral dewatering equipment is provided with the discharge port and the tailing slurry liquid outlet, the discharge port is discharged as building sand, the ore slurry liquid outlet of the first screening equipment is connected with the primary cyclone sorting equipment, the overflow outlet of the primary cyclone sorting equipment is connected with the secondary cyclone sorting equipment, the underflow outlet of the secondary cyclone sorting equipment is connected with the primary dynamic static separation equipment, the tailing slurry liquid outlet of the primary dynamic static separation equipment is connected with the four-stage concentration equipment, the concentrated ore slurry outlet of the four-stage concentration equipment is connected with the four-stage dewatering equipment, the application can perform ladder classification screening on the stone powder, the whole system is closed loop connection, and the dust pollution to the environment is avoided.

The application relates to an aerated concrete prepared from granite waste rock powder and a preparation method thereof. The aerated concrete of the application takes granite waste rock powder (skeleton effect), calcium carbide slag (calcic material), clay (sintering promotion), red mud (gel filling) and coal gangue (siliceous material) as core raw materials, replaces traditional natural sandstone and lime, realizes industrial solid waste resource utilization, conforms to the development direction of green building materials, and significantly reduces the dependence on natural resources.

The application relates to a natural stone powder finishing construction process, which comprises the following steps: step one, material arrival inspection; step two, base layer pretreatment; step three, after the base layer treatment is completed, an alkali-resistant sealing liquid is sprayed to seal the bottom; step four, base coarse aggregate layer construction: a first coarse aggregate layer is scraped to form a base and an alkali-resistant grid cloth is attached, after the base is solidified and dried, a cake is attached to form a reinforcing rib, and a second coarse aggregate layer is sprayed and leveled by using a spraying machine; step five, middle coating layer construction: after the second coarse aggregate layer is solidified and dried, a first middle coating layer is scraped, vertical scraping and gradual leveling are carried out, after the first middle coating layer is solidified and dried, a second middle coating layer is scraped horizontally and is precisely leveled; and step six, surface coating layer construction: the surface coating layer is scraped vertically, and light is collected before the surface coating layer is initially solidified and hardened. Compared with a traditional construction method, the construction process is more suitable for natural stone powder construction, and is simple, convenient and environment-friendly.

The application discloses a concrete production method, comprising the following steps: step 1, determining the quantity of materials needed to be added to ordinary concrete according to the required compressive strength of the roller compacted concrete; step 2, sequentially adding the required materials into the ordinary concrete and performing roller compacting mixing in the concrete; step 3, adding an admixture into the concrete obtained in step 2 through a low-temperature high-pressure spraying mixing mode; and step 4, adding asphalt into the concrete obtained in step 3 and uniformly mixing to obtain the roller compacted concrete. Further, the materials comprise stone powder, fly ash and pozzolanic admixture. The application increases the hardness and compressive strength of the ordinary concrete through material adding and process treatment, so that the roller compacted concrete can be produced on site when the demand is small, and factory ordering is not needed, thereby saving the construction cost.

The invention discloses concrete, which is prepared from the following raw materials in parts by weight: 230 to 250 parts of cement, 100 to 110 parts of slag powder, 60 to 65 parts of fly ash, 400 to 420 parts of washed sand, 220 to 240 parts of stone powder, 265 to 280 parts of fine sand, 770 to 800 parts of stone with the particle size of 10 to 20 mm, 190 to 200 parts of stone with the particle size of 5 to 10 mm, 95 to 100 parts of mixing water and 7 to 10 parts of additives. Through reasonable proportioning of concrete raw materials, the problems of segregation, bleeding and the like caused by unreasonable proportioning in the past are avoided, and the strength and durability of the concrete are greatly improved, so that the maintenance and replacement cost of a project is reduced, the safety of the project is improved, and the service life of the project is prolonged.

The invention belongs to the technical field of building materials. The invention provides a stone powder-based stone-like material. The stone powder-based stone-like material comprises a stone powder-based stone-like green body and a stone curing layer arranged on the surface of the green body, the stone powder-based stone-like green body comprises a core stone powder base material, functional mineral powder, a bonding modification system, a water reducing agent, water and a decorative aggregate; wherein the components in parts by mass are as follows: 50-70 parts of the core stone powder base material, 8-12 parts of the functional mineral powder, 12-15 parts of the bonding modification system and 0-1 part of the decorative aggregate; the water reducing agent accounts for 1-2% of the total mass of the core stone powder base material, the functional mineral powder and the bonding modification system, and the water accounts for 8-12% of the total mass of the core stone powder base material, the functional mineral powder and the bonding modification system. The stone powder-based stone-like material is based on metamorphic rock mineral raw materials and can simulate the characteristics of natural rock materials, so that the prepared material is remarkably superior to an existing stone-like material in the aspects of texture level, structural compactness and overall stone-like effect; and moreover, the solid waste utilization rate is high, and the process adaptability is high.