34 results about "River sand" patented technology

The utility model relates to river sand production equipment technical field especially is a kind of river sand cleaning dewatering screening device, including screening bucket support assembly, screening bucket subassembly and dehydration drying assembly, in the utility model, by the rotating gas delivery shaft, stirring rod, air heater, gas delivery disc, exhaust box and exhaust nozzle being set, the device can make screening bucket body vibrate by vibration motor, river sand is stirred by stirring rod, air is heated by air heater simultaneously, hot air is shunted by gas delivery disc and rotating gas delivery shaft, hot air is discharged by exhaust box and exhaust nozzle, river sand is dried and dewatered by the hot air of circulating flow, both can make river sand that is agglomerated due to dampness fast dry, improve the speed of river sand screening, also can make the river sand that originally is accumulated together to dry is dispersed to different screen plate and is constantly turned over, improve the speed of drying and dewatering, this mode is shorter in time, and efficiency is higher.

The application relates to the technical field of building materials, in particular to a full-recycled coarse aggregate and fiber composite impact-resistant concrete and a preparation process, which comprises the following components: cement 389-393 parts, river sand 785-793 parts, recycled concrete aggregate 1085-1095 parts, water reducing agent 5.863-5.867 parts, nylon fiber 1.13-1.19 parts, steel fiber 31.1-31.7 parts and tap water 160-200 parts. The full-recycled coarse aggregate is combined with the nylon fiber and the steel fiber in a specific proportion, and the dosage of the cementing material, the aggregate and the water reducing agent is optimized, so that the building solid waste is recycled, the consumption of the natural aggregate is reduced, the integrity and the toughness of the recycled concrete matrix are improved, the generation and the expansion of the micro cracks under the impact load are effectively inhibited, the defects of the traditional recycled concrete, such as the brittleness and the insufficient impact resistance, are improved, and the concrete has better compressive resistance, tensile resistance and impact resistance mechanical properties.

The utility model discloses sand screening equipment for hydraulic engineering, which belongs to the technical field of sand screening equipment and comprises a support frame, and a screening shell is fixedly mounted at the top end of the support frame; a discharging pipe is fixedly installed at the other end of the screening shell, a first motor is fixedly installed at the bottom of one end of the screening shell, an output shaft of the first motor is fixedly connected with a spiral blade through a coupler, and one end of the spiral blade penetrates through and extends into the discharging pipe; and a screening mechanism for rotatably screening river sand and impurities is arranged in the screening shell, and a limiting mechanism for prolonging the retention time of the river sand is arranged in the screening mechanism. By arranging the limiting mechanism, the standing time of river sand in the screen drum can be prolonged, it is ensured that the river sand and impurities are fully separated, the situation that the impurities are discharged along with the river sand is reduced, the purity and efficiency of sand screening are improved, the quality stability of the river sand is ensured, and the requirement of a user for high-quality river sand is met.

This invention discloses a high-elasticity modulus concrete and its preparation method. The high-elasticity modulus concrete comprises, by weight, cementitious materials: volcanic rock: river sand: water: water-reducing agent in a ratio of 575:990:755:115:(20-22). The cementitious materials, by weight, comprise: cement: fly ash: silica fume in a ratio of (375-435):85:55. This invention utilizes volcanic rock as coarse aggregate to construct a rigid skeleton, and incorporates cementitious materials to leverage their synergistic physical filling and volcanic ash effect, optimizing the matrix density and interfacial transition zone structure. Combined with ultrasonic-assisted mixing, it achieves uniform dispersion and efficient hydration of fine materials. This concrete exhibits high compressive strength and high elastic modulus, demonstrates low shrinkage and creep characteristics, good volume stability, and excellent durability. It is suitable for high-rise and super high-rise buildings and large-span structural engineering, significantly improving structural stiffness, saving building materials, and increasing usable space utilization.

The application relates to the field of building materials and discloses a sound and heat insulation light building material and a preparation method thereof. The light building material comprises cement, fly ash, river sand, quartz sand, a foaming agent, a modified composite filler-based water reducing agent and water. The foaming agent is made of sodium dodecyl sulfate, hydroxypropyl methyl cellulose, modified nano-aluminum oxide and nano-silicon dioxide. The modified nano-aluminum oxide is prepared by the following steps: reacting oleic acid with nano-aluminum oxide, emulsifying through a Pickering emulsion method, and selectively dissociating through a saponification reaction induced by sodium hydroxide. The modified composite filler-based water reducing agent is prepared by the following steps: in-situ esterification modification of a composite filler made by grafting isoprenyl alcohol polyoxyethylene ether on graphene oxide and carbon fiber, and then free radical copolymerization with acrylic acid. The light building material prepared by the application has high compressive strength and flexural strength, small water absorption and good heat insulation performance.

This invention discloses a high-fire-resistant concrete, characterized by being composed of the following components in parts by weight: 20-25 parts cement, 30-35 parts crushed stone, 10-25 parts river sand, 10-12 parts volcanic ash, 10-20 parts water, 1-3 parts epoxy-propionic acid modified octa-tetramethylcyclotetrasilazane, 0.3-0.6 parts guanidine carbonate, 1-3 parts calcium borate, 0.5-1 part waste polyarylene diazole fiber, and 0.1-0.3 parts 3-chloro-2-hydroxypropanesulfonic acid modified 2,5-bis(diethylamino)phenyl-1,3,4-diazole. This invention also discloses a method for preparing the aforementioned high-fire-resistant concrete. The high-fire-resistant concrete disclosed in this invention exhibits high fire resistance, good workability, excellent comprehensive performance, impermeability and crack resistance, durability, and high compressive strength.

The present application belongs to the technical field of floor construction, and particularly relates to a floor laying method based on an anti-static fluorosilicon anti-cracking fiber flow spreading mortar, the flow spreading mortar comprising the following components in parts by weight: 350-400 parts of low-alkaline silicate cement and high-strength sulphoaluminate cement, 50-60 parts of fluorosilicon modified resin emulsion powder, 200-220 parts of superfine quartz sand, 180-200 parts of washed river sand, 8-12 parts of chopped basalt fiber, and 3-5 parts of graphene anti-static powder. The present application realizes the effects of 28d flexural strength ≥ 8MPa, abrasion resistance ≤ 200mm, and stable anti-static performance without attenuation by compounding special high-strength cement and adding functional components such as chopped basalt fiber and graphene anti-static powder, and optimizing the stability of the internal network structure of the mortar, so that the floor has high flexural strength, high abrasion resistance, and stable anti-static performance. 3 ​

This application relates to the field of building materials technology and discloses a low-cost micro-expansion ultra-high performance concrete and its preparation method. The raw materials of the concrete include water, cement, silica fume, limestone powder, fine aggregate, coarse aggregate, polycarboxylate superplasticizer, CaO-calcium sulfoaluminate-based composite expansion agent, and sodium polyacrylate-based internal curing agent. The fine aggregate is river sand, and the coarse aggregate is basalt crushed stone. During preparation, the powders are first mixed dry, then an aqueous solution of the superplasticizer is added and stirred into a uniform slurry. The aggregate is then added, stirred, and finally molded and cured. This invention utilizes the internal curing agent to desorb moisture when the internal humidity of the concrete matrix decreases, providing moisture compensation for the later hydration of the composite expansion agent, causing the dense matrix to undergo micro-expansion deformation and convert it into self-stress. This solution effectively compensates for the volume shrinkage caused by the low water-cement ratio, reducing the risk of cracking. Simultaneously, the use of conventional sand and gravel instead of pure quartz sand significantly reduces the cost of large-scale preparation.

The application belongs to the field of building waste recycling, and specifically provides high-performance concrete based on building solid waste regenerated micro powder and a preparation process thereof, which is prepared by mixing raw materials including the following components by mass: 100-115 parts of gravel; 70-75 parts of river sand; 21-28 parts of Portland cement; 16-17.5 parts of water; 7-14 parts of modified regenerated micro powder; and 0.3-0.35 parts of water reducing agent; wherein the modified regenerated micro powder is obtained by surface treatment of building solid waste regenerated micro powder with a modifier; and the concrete obtained by mixing the modified regenerated micro powder has a 28d compressive strength of no less than 42.8 Mpa and a flexural strength of no less than 5.1 Mpa, and has good durability.

This invention discloses a simulation calculation method for the impact of river sand mining on navigation flow conditions, including: collecting and integrating basic geographic information and hydrological data of the sand mining area to construct a digital elevation model and hydrological database covering the entire area; based on the integrated data and Cartesian coordinate system, using an unstructured grid to partition the sand mining area to obtain a grid file of the sand mining area; given the initial conditions, boundary conditions, and dynamic boundary technology of the model, establishing a two-dimensional planar hydrodynamic model based on two-dimensional continuity equations and two-dimensional momentum equations through data collection and preprocessing; conducting model verification and calibration experiments based on existing historical measured data; and designing two sets of working conditions before and after sand mining according to the sand mining scheme and navigation engineering design scheme, obtaining prediction results based on the simulated values ​​of the hydrodynamic model.

This invention discloses a precast curbstone block and its production method, belonging to the field of road construction technology. The precast curbstone block consists of a bottom layer and a top layer; the bottom layer is composed of the following raw materials in parts by weight: 250-300 parts cement, 50-80 parts fly ash, 850-920 parts machine-made medium sand, 600-650 parts 3-5mm gravel, 300-320 parts 5-10mm gravel, and 60-80 parts water; the top layer is composed of the following raw materials in parts by weight: 1500-1700 parts river sand, 550-650 parts cement, and 140-160 parts water. This invention abandons the conventional model casting and one-piece molding process, and adopts dry hard concrete with low water-cement ratio. It uses a layered mixing and multi-layer integrated extrusion molding construction process, which makes the precast curb blocks more economical in terms of material usage and significantly increases their strength. It only needs to go through the production steps of mixing, pressing and curing, and the curing can be carried out at 50℃ for 8 hours, which improves the production efficiency. The precast curb blocks produced are of stable quality, high efficiency and low failure rate.

The utility model discloses a river sand conveying device, including support, two -stage self -adaptation cleaning mechanism, arc scraper, rolling brush, suppression mechanism, spiral material distributor, dust removal pipe and ultrasonic wave material position ware, the baffle is fixedly connected on the support, the horizontal bar is fixedly connected on the support, and the upper surface fixedly connected with fastening clamp axle of horizontal bar, the utility model discloses adopting has the structure, and the automatic material of this device through the two -stage self -adaptation cleaning mechanism of innovative design and collection box and dust suppression structure, realizes the collaborative optimization of efficient cleaning, intelligent material and environmental protection operation in river sand conveying operation, in the cleaning aspect, this novel adopts the two -stage progressive cleaning structure of scraper and rolling brush, forms the ladderization residual treatment logic, and the scraper is in rigid contact and first peels off the big block adhesion sand particle and the agglomerate on the surface of the conveying belt, especially for the high clay content viscous river sand, can remove more than seventy percent of the stubborn residual at a time.

The application discloses polymer-based anti-cracking concrete and a preparation method thereof, and relates to the technical field of concrete. In the preparation of the polymer-based anti-cracking concrete, acrylic acid is grafted on the surface of pretreated polypropylene particles to prepare modified polypropylene particles; sodium alginate is used to coat sodium metasilicate to prepare self-repairing microcapsules; 3-glycidyl ether oxypropyl trimethoxysilane is hydrolyzed and grafted on the surface of silicon dioxide to prepare modified silicon dioxide; the modified polypropylene particles, basalt fibers and polyacrylonitrile fibers are mixed to prepare a solid functional component; and cement, slag powder, silica fume, an expanding agent, the solid functional component, the modified silicon dioxide, a water reducing agent, an air entraining agent, deionized water, river sand, crushed stone and pre-wetted self-repairing microcapsules are mixed to prepare the polymer-based anti-cracking concrete. The polymer-based anti-cracking concrete prepared by the application has excellent anti-cracking, anti-freezing and thawing and self-repairing properties.

The application provides a concrete, raw materials of the concrete include the following components in parts by weight: cement 320-420 parts; mineral admixture 80-105 parts; natural river sand 621-678 parts; engineering waste soil-based lightweight aggregate 273-410 parts; water 150-158 parts; additive 4.8-6.3 parts. The application can effectively utilize the engineering waste soil-based lightweight aggregate, realize high-value utilization of solid waste, and significantly reduce the drying shrinkage of the concrete.

The application provides a method for preparing concrete based on desert sand and recycled glass fiber of retired wind power blades, comprising the following steps: performing mechanical cutting on the main beam and skin parts of the retired wind power blades, and processing the main beam and skin parts into block materials; the block materials are subjected to crushing, grinding and screening treatment to obtain recycled glass fiber; the recycled glass fiber, coarse aggregate and fine aggregate are uniformly dry-mixed according to a preset mixing ratio, and then cementing material and mixing water are added, and low-speed dispersion stirring is performed to obtain concrete; the application breaks through the limitation that the desert sand and the recycled glass fiber are independently applied in the prior art, and combines the two for the first time to prepare high-performance concrete, solves the industry blank that the high-substitution-rate desert sand concrete has insufficient performance and the recycled glass fiber is only suitable for river sand, and builds an integrated technical path of "solid waste resourceization + high-performance material".

This invention discloses a modified concrete material, an integrated cable conduit foundation, and a molding method, belonging to the field of lightweight building materials technology. The modified concrete material consists of the following components by weight: silicate cement, mineral powder, silica fume, river sand, crushed stone, thermal conductivity reinforcing filler, flexible shrinkage-reducing component, polymer fiber, composite water-reducing agent, and water. The thermal conductivity reinforcing filler is a 3:1 mixture of modified silicon carbide powder and silica-coated spherical aluminum powder; the flexible shrinkage-reducing component is a core-shell structure particle of polyethylene glycol diglycidyl ether coated with magnesium oxide. The molding method includes the installation of a modular positioning support system, cable conduit laying, modified concrete preparation, and layered pouring. This invention achieves high thermal conductivity, high density, and synergistic expansion control through a dual core-shell structure and optimized filler particle size distribution, making it suitable for underground cable conduit foundation construction.

This invention discloses a method for preparing reinforced waste concrete recycled aggregate and recycled concrete. 5-10 parts of waste diatomaceous earth filter aid, 2.5-5 parts of water glass, 50 parts of water, and 85-92.5 parts of ordinary silicate cement are mixed to form a reinforcing slurry. This reinforcing slurry is then coated onto the waste concrete recycled aggregate to obtain the reinforced waste concrete recycled aggregate. (1) Recycled concrete is prepared using 306-360 parts of ordinary silicate cement, 1150-1200 parts of the reinforced waste concrete recycled aggregate as described in claim 5, 700-750 parts of natural river sand, 1.8-2.88 parts of polycarboxylate superplasticizer, 18-54 parts of waste diatomaceous earth filter aid, and 140-180 parts of water. Compared with ordinary waste concrete recycled aggregate, the reinforced waste concrete recycled aggregate has lower water absorption and crushing index, and the modified recycled concrete has better mechanical properties and durability. The method for preparing recycled concrete of this invention has the advantages of reinforcing waste concrete recycled aggregate, improving the mechanical properties of recycled concrete, and enhancing its resistance to chloride ion erosion.

This invention discloses an alkali-activated lithium mica tailings concrete and its preparation method, relating to the field of building materials technology. The alkali-activated lithium mica tailings concrete comprises the following raw materials in parts by weight: 0-168 parts lithium mica tailings, 252-420 parts slag, 656 parts fine aggregate, 1027 parts coarse aggregate, 60 parts solid alkali activator, and 240 parts water. This invention enables the resource utilization of solid waste from the lithium industry. This concrete does not contain cement clinker, thus reducing carbon emissions compared to traditional cement concrete. Simultaneously, the lithium mica tailings can replace some natural river sand, reducing the consumption of natural sand and gravel resources. Using anhydrous sodium silicate as a solid alkali activator avoids the corrosiveness and storage inconvenience problems associated with liquid alkali activators.

The application discloses an anti-floating anchor rod and waterproof layer integrated construction method, and belongs to the technical field of underground engineering rock soil anchoring; in view of the pain points that the anti-corrosion coating is easily scratched during construction, the free section isolation layer forms a permanent weak interface, and the traditional degradable material is unreliable in microbial degradation, the application coats the anchor rod with an anti-corrosion primer, and only in the free section, a hydrolyzable degradable fiber braided sleeve bag filled with buffer dry powder is worn, and the anchoring section is directly grouted. The sleeve bag is made of polyglycolic acid and poly (lactic acid-co-glycolic acid) blended fiber, the dry powder contains river sand, fly ash, a small amount of cement and an alkaline hydrolysis accelerator, and the controllable hydrolysis of 12-24 months is realized through internal and external double-alkali triggering; the application buffers and protects the coating during construction, forms a non-Newtonian fluid to absorb energy and reduce vibration during use, completely eliminates the organic interface after degradation, the anchoring section is not affected by the uplift capacity, the free section realizes long-acting waterproof and corrosion protection, the comprehensive cost is low, the construction is simple, and the application meets the current specification requirements.

This invention relates to the field of road material technology, specifically to a cement-based solid waste composite material for road base courses and its preparation method. The raw materials for preparing the cement-based solid waste composite material for road base courses include the following components in parts by weight: 400-600 parts of sulfoaluminate cement, 200-300 parts of calcined coal gangue powder, 150-250 parts of fly ash, 30-60 parts of desulfurized gypsum, 300-400 parts of river sand, 4-6 parts of modified carboxylic acid polymer, 8-12 parts of modified SiO2, 300-400 parts of water, and 20-25 parts of polyvinyl alcohol fiber. The cement-based solid waste composite material for road base courses obtained by this invention has good mechanical properties and durability.

The present application belongs to the technical field of unconventional natural gas exploitation, and specifically provides a braided river sand body scale prediction method, which solves the problem of the braided river sand body in the existing research area, which is multi-layer superimposed, frequent river channel migration and thin sand body thickness, increases the difficulty of predicting the reservoir scale of seismic data, and urgently needs a new sandstone reservoir scale prediction method and means; according to the characteristics of the braided river and the actual gas field development, the present application screens out the relationship between the sand body thickness drilled by the block well and the corresponding well spacing and two parameters of the river channel swing angle, predicts the river channel sand body scale, perfects the sand body prediction method, establishes a set of braided river sand body scale prediction mode suitable for the whole basin, has good effect, is a good supplement to the seismic prediction of the sand body scale, and provides technical support for the deployment and effective exploitation of the natural gas well.

The present application relates to the technical field of building materials, in particular to a kind of super high performance concrete based on MnSO4 modified white rice hull ash and its preparation method and application.In the present application, MnSO4 modified white rice hull ash is used to replace quartz powder, and together with cement, silica fume, fine aggregate river sand, coarse aggregate basalt, steel fiber, water and water reducing agent, a kind of super high performance concrete with super high strength, toughness and high anti-shrinkage capacity is formed.The super high performance concrete based on MnSO4 modified white rice hull ash provided by the present application meets the requirements for UC100 strength grade concrete in GB / T45594-2025 "Test Method for Performance of Non-load-bearing Components of Ultra-high Performance Concrete", and in addition, its self-shrinkage performance is less than 0.005% at 7d, less than 0.02% at 28d and less than 0.04% at 91d.

A synergistically modified bamboo fiber concrete is composed of the following components in parts by weight: 250-280 parts of P.O42.5 ordinary Portland cement, 680-720 parts of river sand, 992-1115 parts of crushed stone with a particle size of 4.5-9mm, 58-66 parts of fly ash, 60-72 parts of mineral powder, 2.13-3.25 parts of calcium lignosulfonate, 0.9-1.2 parts of aluminum powder paste conforming to the current JC / T407 standard, 3.4-6.2 parts of modified bamboo fiber, and 127-140 parts of water. A method for preparing the synergistically modified bamboo fiber concrete is also provided. This invention achieves a dual enhancement of interfacial bonding strength and interlocking force in concrete, significantly improving crack resistance and mechanical stability, extending the service life of engineering projects, and effectively expanding its application range in special engineering scenarios such as underground and marine environments.

The application relates to the technical field of building materials, in particular to an acid-alkali-resistant and corrosion-resistant high-strength composite drainage pipe and a preparation method thereof. The pipe comprises the following raw materials in parts by weight: 260-350 parts of sulphoaluminate cement, 40-80 parts of fly ash, 60-90 parts of solid waste-based micro-nano composite, 600-760 parts of river sand, 950-1200 parts of gravel, 110-150 parts of water, 12-18 parts of microcapsule repair agent, 5-10 parts of microbial mineralization repair agent, 6-8 parts of additive, and 0.8-1.0 parts of polypropylene fiber. The corrosion-resistant cementitious material and the double-mechanism self-repairing system are synergistically integrated, so that the drainage pipe has high strength, realizes intelligent sensing, rapid sealing and permanent healing of microcracks, and the durability and service life of the pipe in a corrosive environment are remarkably improved.

The application relates to a kind of shield foam wall post-grouting material using siltstone slag and a preparation method, and belongs to the technical field of shield tunnel construction.The shield foam wall post-grouting material using siltstone slag comprises slurry and water glass, and the slurry comprises cement 5-10% by mass fraction, fly ash 13-18%, sodium dihydrogen phosphate 0.1-0.6%, bentonite 4-8%, bubble liquid 0.5-2%, pretreated siltstone 34-39%, xanthan gum 1-5%, and the rest is water, and the volume ratio of the slurry to water glass is 1:0.1-0.14.The application replaces river sand with siltstone, solves the problem of difficult disposal of waste slag, is an economic and environmentally-friendly method for recycling waste soil, and has good environmental benefits.

The application discloses a river sand facies controlled high-resolution inversion method of structural class attribute constraint, and the inversion method comprises the following steps: step S1, river facies facies belt division based on structural class attribute; step S2, well logging data preprocessing, and calculating a matching factor at a well site; step S3, calculating an inversion wavelet according to the matching factor, and performing space variation processing on the matching factor; step S4, establishing an initial impedance model based on the characteristics of a work area and structural class attribute; and step S5, performing facies controlled high-resolution inversion according to the initial impedance model. For the river sand target, the identification capability of a seismic trace beside a well is improved through well-to-seismic correlation and matching, and then high-resolution wave impedance data volume is obtained through the constraint high-resolution inversion, and a horizon slice exhibits good river sand delineation capability.

The application discloses a method for identifying abandoned river channels and deterioration zones in sand bodies in a river channel, and comprises the following steps: selecting original seismic data, and establishing a fine isochronous stratigraphic framework of well-seismic combination in a typical block; on the basis of the fine isochronous stratigraphic framework, geological parameters of different types of sand bodies are extracted, a forward modeling model based on distribution characteristics of different types of sand bodies in a target layer is established, and forward modeling is completed; according to the forward modeling result, seismic response characteristics of a point bar, an abandoned river channel and a deterioration zone in the point bar are analyzed; the spectrum of a seismic attribute volume in the original seismic data is converted from a time domain to a frequency domain; according to the seismic response characteristics, a plurality of single-frequency volumes are selected from the converted seismic attribute volume; RGB attribute fusion is performed on the plurality of single-frequency volumes; and according to an obtained RGB attribute fusion image, the point bar, the abandoned river channel and the deterioration zone are identified. The application is based on forward modeling, and the wave group characteristics of the abandoned river channel and the deterioration zone are clear, so that longitudinal profile identification of the abandoned river channel and the deterioration zone is realized.