232 results about "Stone dust" patented technology

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 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 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 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 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.

The utility model relates to the technical field of stone dust removal equipment, in particular to mine stone dust removal equipment which comprises a cleaning pool, machine shells are arranged on the left side and the right side of the top end of the cleaning pool respectively, a lifting assembly is arranged in an inner cavity of each machine shell, and supports are arranged on the sides, close to each other, of the two lifting assemblies. A storage frame is arranged at the bottom ends of the two supports, a through hole is formed in the bottom end of the storage frame, the storage frame inclines by 30 degrees from back to front, and a flushing assembly is arranged at the bottom end of an inner cavity of the cleaning pool. According to the mine stone dust removal equipment, stones are conveyed to the inner cavity of the cleaning pool through the conveying line, dust and soil on the surfaces of the stones can be thoroughly cleaned through the cleaning assembly, then the outer walls of the stones are kept clean, and the problems that in the prior art, stone dust removal equipment is not thorough in dust removal in the actual use process, and the dust removal efficiency is high are solved. The dust can only be temporarily settled, and the dust on the surface of the stone still drifts away after the water is evaporated.

The application discloses a kind of weathered marble waste stone powder resource utilization composition and application thereof, belong to environmental protection technical field.The weathered marble waste stone powder resource utilization composition includes marble waste stone powder, soil and microalgae biological fertilizer SynMiCom.The application mixes soil in marble waste stone powder and then adds SynMiCom, which can significantly reduce the pH of marble waste stone powder, significantly increase the content of reduced nitrogen in marble waste stone powder, significantly increase the content of available phosphorus in marble waste stone powder, significantly increase the enzyme activity in marble waste stone powder, and significantly promote the growth of peppers in marble waste stone powder.The application utilizes the long-term weathered marble waste stone powder, which has low cost and high application value.

The invention relates to the technical field of printing ink curing coatings, and discloses a preparation method of an external wall stone-imitating thermal insulation coating. The coating is prepared from the following components in parts by mass: 30 to 50 parts of acrylic emulsion, 8 to 20 parts of glass powder, 5 to 15 parts of ceramic powder, 15 to 30 parts of natural stone powder, 10 to 25 parts of sand grains, 0.3 to 1.2 parts of thickening agent, 0.5 to 1.5 parts of wetting dispersant, 1.5 to 3.5 parts of coalescing agent, 1 to 5 parts of mildew-proof weather-proof agent and 50 to 80 parts of water. By adding the glass powder, the ceramic powder and other components, a microcosmic heat insulation layer is formed in the coating, heat conduction is effectively reduced, energy consumption of a building is reduced, and a good heat insulation effect is achieved. The mildew-proof and weather-proof agent is a brand new compound, and long-acting bacteriostasis is realized by destroying cell walls of mildew or interfering a metabolic enzyme system of the mildew. The mildew-proof coating has high stability in a humid environment, is not easy to decompose, and can provide lasting mildew-proof protection for buildings.

The application discloses a kind of adsorptive control materials for tunnel hole slag stone powder and application.The adsorptive control material is mixed by surface active component, complex component, anti-mud component three components according to 3-7:1:0.5-5 mass ratio;The surface active component is one or more of dodecyltrimethylammonium chloride, dodecyl dimethyl benzyl ammonium chloride, didodecyltrimethylammonium chloride;The complex component is one or more of sodium silicate, sodium hexametaphosphate;The anti-mud component is one or more of polyethylene glycol, β-cyclodextrin, dimethyl diallyl ammonium chloride.The adsorptive control material can improve the adsorption of tunnel hole slag stone powder, ensure the working performance of concrete.

The invention relates to the technical field of material conveying, in particular to a silo material loading structure which comprises a supporting table, a material conveyor and a material guiding unit. The material conveyor is mounted on the supporting table; the material guide unit is provided with an input end and an output end, the input end is connected with the material conveyor, and the output end extends into the boxcar; the material guide table is configured to be capable of being switched between a first operation state and a second operation state; dust suppression liquid is stored in the material guide table, and the driving mechanism is configured to drive the material guide table to be converted from the first operation state to the second operation state and synchronously trigger the dust suppression liquid in the material guide table to be pressurized and sprayed out; the problems that operation is troublesome due to the fact that a truck needs to be moved frequently when an existing truck loading structure adopts a fixed-dip-angle material guiding belt for truck loading, and the dust suppression effect is poor due to the fact that dust suppression liquid cannot make rapid contact with stone powder at the bottom of the material guiding belt are solved.

The application discloses a dry discharge dehydration system and method for efficiently recycling fine sand and stone powder fine particles by gravity precipitation, which comprises a groove belt type fine sand recycling system and a shower type tail slurry distribution system arranged at the upper portion of the groove belt type fine sand recycling system; the groove belt type fine sand recycling system is divided into a fine sand water control dry discharge section, a fine sand precipitation recycling section and a sewage discharge section along the running direction of the groove belt type fine sand recycling system; the fine sand water control dry discharge section, the fine sand precipitation recycling section and the sewage discharge section are connected into an integrated whole by an annular conveying groove belt; the slurry is in the form of water droplets and does not have impact force by the thickness of at least 3 layers of punching plates, so that the slurry can better complete precipitation and will not scour the precipitation layer; the application utilizes the principle that particles in sewage will be affected by gravity and flow rate to produce precipitation, realizes efficient recycling of fine particles and ultra-fine particles, and solves the technical problem that materials below the sieve hole diameter of a screening device are difficult to recycle.

The invention discloses a comprehensive evaluation method for the quality of granite stone powder. The method comprises the following steps: acquiring particle size distribution characteristic parameters of the granite stone powder; obtaining the fluidity ratio F of the granite stone powder; obtaining the activity index of the granite stone powder; and establishing a comprehensive quality evaluation calculation model containing the particle size distribution characteristics, the fluidity ratio and the activity index, and calculating the comprehensive quality index based on the particle size distribution characteristic parameters, the fluidity ratio and the activity index of the granite stone powder. The invention further discloses a granite stone powder quality comprehensive evaluation system. The method has the beneficial effects that the three core dimensions for representing physical and chemical performance coupling of the granite stone powder are combined, a multi-dimensional comprehensive evaluation calculation model is constructed, a single comprehensive quality index with clear physical significance is output, complex performance representation is converted into a visual and quantifiable quality grading standard, and the quality of the granite stone powder is effectively evaluated. The comprehensive and systematic characterization of the granite stone powder quality is realized, and the problem of one-sided evaluation in the prior art is solved.

The invention discloses a machine-made sandstone powder content automatic detection device, and belongs to the technical field of machine-made sand detection.The machine-made sandstone powder content automatic detection device comprises a tank body and a screening box, a plurality of telescopic rods are fixedly connected between the screening box and the tank body, the telescopic rods are sleeved with third springs, and a partition plate is fixedly connected into the tank body; a detection cylinder, a base and a placement block are arranged below the partition plate; and by arranging the screening box and the baffle, the proportion of coarse sand, medium sand and fine sand entering the tank body is precisely controlled. A material mixing plate arranged in the tank body is responsible for uniformly mixing the machine-made sand, part of mixed finished products are sent into a detection cylinder for detection, at the moment, a stirring rod and a dipping rod are sequentially driven to move, the machine-made sand in the detection cylinder is stirred and detected, the quality of the machine-made sand in the grading process is directly monitored, and if it is detected that the content of stone powder in the machine-made sand does not reach the standard, the machine-made sand is qualified. And the mixing amount of the fine sand can be immediately controlled by adjusting the baffle, so that the detection efficiency is remarkably improved.

The invention provides a machine-made sand mortar performance regulation and control method based on hydration kinetics, and relates to the technical field of building materials. The method comprises the following steps: preparing and testing machine-made sand with different stone powder contents, gradation and flaky particle contents, determining a standard mix proportion of mortar, and testing the macroscopic performance of the mortar; hydration kinetic parameters are extracted through a hydration heat test, and the content of chemically bound water is obtained through thermogravimetric analysis; establishing a quantitative relation among the machine-made sand parameters, the hydration kinetic parameters and the macroscopic performance by utilizing correlation analysis, and determining key control parameters; and a machine-made sand parameter regulation and control principle taking hydration kinetics as a core is formed. According to the method, the mix proportion design is guided from the microscopic hydration mechanism level, the trial mixing workload is remarkably reduced, and the scientificity and efficiency of the mix proportion design are improved.

The embodiment of the application provides a PCB drilling house platform structure and a construction method, the platform structure comprises: a foundation soil layer at the bottom; a three-dimensional anti-static grounding net installed on the foundation soil layer, the three-dimensional anti-static grounding net comprises grounding feet inserted into the foundation soil layer and connecting columns extending upwards; a first stone powder layer laid on the upper surface of the foundation soil layer; a shock-absorbing material layer laid on the upper surface of the first stone powder layer; a second stone powder layer laid on the upper surface of the shock-absorbing material layer; a first concrete layer cast on the upper surface of the second stone powder layer; a second concrete layer cast on the upper surface of the first concrete layer, the thickness and strength of the second concrete layer are greater than those of the first concrete layer, and a double-layer bidirectional steel reinforcement framework is embedded in the second concrete layer; and a ground bearing layer laid on the second concrete layer, the top end of the connecting column extends above the ground bearing layer. The embodiment can prevent vibration and static electricity from interfering with the equipment in the PCB drilling house.

The invention relates to the technical field of building material production and industrial process control, in particular to an online regulation and control method, system and equipment for the content of machine-made sandstone powder and a storage medium. Comprising the following steps: acquiring real-time detection data of the stone powder content in a machine-made sand production process; on the basis of the real-time detection data, the current mountain flour content is compared with a preset allowable range, and whether the mountain flour content deviates or not is judged; when deviation is detected, based on a pre-established corresponding relation between the stone powder content and the operation state corresponding to the operation frequency of the grading equipment, screening and determining a target operation state capable of calling the stone powder content back to the allowable range from a plurality of preset operation states; and a regulation and control instruction corresponding to the target operation state is sent to the grading equipment, so that the current operation state is adjusted to the target operation state, and the content of the machine-made sandstone powder is adjusted back to be within the allowable range. According to the method, the quick callback and stable control of the content of the machine-made sand and stone powder are realized under the condition of not increasing homogenizing equipment.

The invention relates to the technical field of anchoring agents, and provides a mining anchoring agent and a preparation method thereof. The mining anchoring agent comprises a curing agent and resin mortar, the resin mortar comprises the following raw materials in parts by weight: 100 parts of resin, 420-520 parts of stone powder, 1-2 parts of silicon dioxide, 1-1.5 parts of a dispersing agent, 3-6 parts of a high-temperature-resistant agent and 1-5 parts of a coupling agent. The high-temperature-resistant agent comprises the following components in parts by weight: 2-10 parts of aluminum distearate and 2-10 parts of metal carbide. According to the technical scheme, the problem of insufficient thermal stability of the mining anchoring agent in the prior art is solved.

The application provides a drum screen grading and powder selecting device and a grading system. The drum screen comprises a base, a supporting device and a cylinder. The cylinder comprises a drum screen mesh and a mesh support. A first cavity is enclosed in the drum screen mesh. A drum screen sealing cover is arranged on the periphery of the cylinder. A second cavity is arranged between the drum screen mesh and the drum screen sealing cover. A first discharge port is arranged below the second cavity. A first air inlet is arranged on one side of the drum screen sealing cover of the ascending section of the material in the cylinder. The first air inlet is connected with an air inlet device. A third cavity is arranged on the outer side of the drum screen sealing cover on the opposite side of the first air inlet. A second discharge port is arranged at the lower end of the third cavity. A stone powder screen is arranged between the third cavity and the second cavity. The application solves the problems of the existing drum screen and dust collector, such as no powder selecting function, uncontrollable stone powder content, high cost, complex structure, unstable product grading and quality of the existing machine-made sand and stone grading system.

The utility model discloses a feeding device for stone powder production, which belongs to the technical field of stone powder production and comprises a shell, a stirring rod is rotatably connected in the shell, a plurality of stirring blades are fixedly connected onto the stirring rod, a first gear is fixedly connected onto the stirring rod, a first belt pulley is coaxially and fixedly connected onto the stirring rod, and a second gear is fixedly connected onto the first belt pulley. An inner gear is fixedly connected in the shell, a scraping cylinder is rotatably connected in the shell, a plurality of scraping plates are arranged in the scraping cylinder, and the scraping plates are attached to the inner wall of the shell. The stone powder feeding device is provided with the scraping device, stone powder adsorbed on the inner wall of the feeding device can be effectively scraped, and the scraping plates have certain inclination angles, so that the stone powder can be effectively scraped. According to the stone powder feeding device, the stirring device is arranged, the caking phenomenon of the stone powder in the storage and transportation processes can be effectively prevented, and therefore the fluidity of the stone powder in the feeding process is guaranteed.

The present disclosure relates to the technical field of dry magnetic separators, and one embodiment of the present disclosure provides a mine dry magnetic separator, which comprises a shell, an inner top wall of the shell is provided with a feeding port, and inner bottom walls of the shell are respectively provided with a first discharging port and a second discharging port; the mine dry magnetic separator further comprises a roller, a magnetic system, a driving disc, a first motor and a cleaning mechanism; limit grooves are formed in opposite side walls of the shell; the roller is rotatably arranged between groove bottoms of the two limit grooves; the magnetic system is fixedly arranged on the groove bottom of one of the limit grooves; the magnetic system is arranged in an arc shape and is in contact with an inner wall of the roller; the driving disc is fixedly arranged at one end of the roller; the first motor is mounted on the side wall of the shell; an output end of the first motor is fixedly connected with the roller; and the cleaning mechanism is arranged on the shell and is used for cleaning iron-containing stone powder attached to the surface of the roller. Through the above technical solution, the technical problem that iron-containing magnetic powder is easily attached to the surface of the roller and affects the magnetic separation effect in the prior art is solved.

The invention relates to the technical field of special low-carbon building materials, in particular to a salinized soil curing agent, a preparation method and application of the salinized soil curing agent to a roadbed, specifically, air-cooled high-carbon ferrochrome slag powder is adopted as a main raw material, and active micro powder is prepared by treating red mud, phosphorus slag powder and magnesite tailing powder; and reinforcing waste gypsum and steel slag powder are added as main active substances, and a large amount of stone powder is added, so that the salinized soil curing agent with excellent mechanical properties, good seawater resistance and high solid waste utilization rate is prepared.

The invention discloses a preparation process of an unfired building block containing stone powder, and belongs to the field of building solid waste recycling. The process comprises the following steps: performing graded crushing to obtain four-stage construction waste aggregate, modifying the four-stage construction waste aggregate with a silane coupling agent-cement composite coating agent, mixing the modified four-stage construction waste aggregate with superfine stone powder according to gradient grading, and performing layered vibration pressure forming and baking-free curing to obtain the building block. According to the invention, three-stage process synergy is adopted: graded crushing is adopted to optimize particle size distribution, surface coating is adopted to enhance interface bonding, gradient grading is adopted to improve structural compactness, 28d compressive strength of the obtained building block is greater than or equal to 15MPa, solid waste mixing amount is greater than or equal to 90%, energy consumption is reduced by 80% compared with that of a traditional process, and carbon emission is reduced by more than 60%. The process is suitable for large-scale production of high-performance unfired wall materials, and has remarkable environmental protection and economic benefits.

The invention discloses a formula and process of an environment-friendly brick, and relates to the technical field of environment-friendly bricks, and the formula of the environment-friendly brick comprises the following components in parts by mass: 58-68 parts of a mixture of shield mud, river mud and sand washing tail mud, 22-28 parts of cement, 10-14 parts of modified stone powder, and a nano silicon-based curing agent; the ratio of the nano silicon-based curing agent to the total mass of the mixture, the cement and the modified stone powder is 0.0015-0.0025. According to the environment-friendly brick and the preparation method thereof, the mixture of the shield mud, the river mud and the sand washing tail mud is taken as a main raw material and is matched with the cement, the modified stone powder and the nano silicon-based curing agent, and the particle size distribution and the water content of the mixture are limited, so that the environment-friendly brick raw material system taking the solid waste as a matrix is optimized; the comprehensive utilization rate of solid wastes and the homogeneity of raw materials can be improved, so that the problems of low utilization rate of solid wastes, poor homogeneity of raw materials and large performance fluctuation in an existing environment-friendly brick raw material system can be solved.

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 discloses a polygonal road structure which comprises a roadbed structure, an assembly type concrete prefabricated slab is laid on the top of the roadbed structure, and the roadbed structure comprises a plain soil covering layer laid on the ground in a tamping mode and a stone powder laying layer covering the left side of the surface of the top of the plain soil covering layer. The right side of the top surface of the plain soil covering layer is covered with the dry hard ash filling layer. According to the scheme, through trapezoidal concave-convex interlocking and L-shaped hooking, quick assembly and top leveling are achieved, the leveling procedure is reduced, the laying efficiency is improved, a reinforcing mesh is arranged in the prefabricated slab, mechanical meshing and curbstone coating are combined, and the compression resistance and displacement resistance are enhanced; the symmetrical prefabricated plates support length expansion, and the curbstone notches and the protruding blocks are coupled to adapt to various road layouts. The water permeable bricks are higher than the prefabricated slabs and matched with the dry hard ash filling layer, rainwater infiltration is promoted, waterlogging is relieved in combination with the green belt design, and the service life of the plates is prolonged through the double-lock-catch design.

The invention provides an anti-cracking machine-made sand mortar admixture with high mixing amount of fly ash and stone powder. The anti-cracking machine-made sand mortar admixture comprises the following components in parts by weight: 5-20 parts of a water reducing agent, 5-15 parts of a thickening agent, 3-10 parts of an air entraining agent, 10-40 parts of a retarder and 50-120 parts of an anti-cracking agent. According to the invention, cracks of the mortar can be effectively inhibited, so that the machine-made sand mortar has good constructability and anti-cracking performance under the conditions of double doping of fly ash and stone powder and high powder material amount, and can be widely applied.