41 results about "Demolition waste" patented technology

A process for the preparation of carbonated recycled concrete fines, particularly recycled concrete fines from construction and demolition waste, and carbonated recycled concrete fines prepared by the process, is described. The process relates to accelerated mineral carbonation of recycled concrete fines having a specific moisture content. Also described is further processing the carbonated recycled concrete fines into secondary aggregate as well as uses and methods involving the carbonated recycled concrete fines and / or aggregate.

The invention discloses a method for improving the moisture infiltration capacity of urban green land soil. The method comprises the following steps that S1, according to design requirements, a foundation is excavated, earthwork is cleaned, the foundation is leveled and divided in a checkerboard mode, and an air pump device is used for aerating the foundation in checkerboard checks; s2, crushing the construction waste: crushing the engineering muck, the engineering slurry, the engineering waste, the demolition waste and the decoration waste into coarse grains with the grain size of 30-50mm, removing metal in the coarse grains, paving the coarse grains on a foundation, and leveling and compacting to form a permeable layer; s3, a starch solution is injected into the permeable layer, glucose is formed after the starch solution is hydrolyzed in the permeable layer, acetic acid is formed after the glucose is alcoholized, hydroformylated and acidified, and the acetic acid reacts with carbonate in the permeable layer to generate water-soluble substances which are consumed, so that the porosity of the permeable layer is improved. The problem that urban inland inundation is prone to occurring due to the fact that urban green land permeability is poor can be solved.

The application provides a building demolition garbage efficient sorting treatment system device and a system method thereof, the system device comprises a feeding module, a heavy screening module or a crushing screening module, the feeding module comprises a bidirectional conveying device, a first direction material outlet of the bidirectional conveying device is connected with a material inlet of the heavy screening module, a second direction material outlet of the bidirectional conveying device is connected with a material inlet of the crushing screening module, and a material outlet of the heavy screening module is connected with a material inlet of the crushing screening module. The system device and the system method have the advantages of strong material adaptability, high automation degree, large processing capacity, high sorting efficiency, stable production line operation, no blockage, and low maintenance cost.

The invention relates to a method for the preparation of a carbonated mineral component in particular for the use as a substituent of cement in hydraulic binder compositions wherein a raw material comprising at least one of the group of concrete demolition waste, hardened concrete paste, hardened cement paste, or any mineral component containing hydrated calcium silicates, calcium aluminates is carbonated and heated, a carbonated mineral component manufactured in this way, a method for the preparation of a hydraulic binder using the carbonated mineral component and a cementitious component as well as a concrete composition with that hydraulic binder.

The invention relates to the technical field of solid waste treatment, in particular to an environment-friendly building demolition waste steel bar recycling and recycling device. A feeding port is formed in the top of a pretreatment mechanism, a water supply mechanism is arranged on the right side of the pretreatment mechanism, a first cleaning rolling brush is arranged on the left side in the box, and a second cleaning rolling brush is arranged on the right side in the box and used for cleaning concrete residues on the surface of a pre-pressing roller; a spray head adjusting rod is located below a first cleaning rolling brush, the scouring angle can be adjusted, dust suppression is achieved in cooperation with a transverse spray head, and the steel bar treatment quality is improved; a crushing box is arranged at the bottom of the right side of the pretreatment box, and dust collection mechanisms are arranged on the front side and the rear side of the pretreatment box and internally provided with a dust collection box and a dust collection fan; the left bottom sorting mechanism is linked with the pretreatment mechanism through a first belt, filter screen accumulation is prevented, a filtering mechanism is arranged below the device, water resource recycling is achieved, coarse aggregate and fine aggregate are separated, classification treatment is facilitated, the pretreatment efficiency is effectively improved, abrasion is reduced, and the service life is prolonged.

The utility model discloses a constructional engineering garbage crusher, which relates to the technical field of constructional engineering and comprises a case, a crushing roller group is arranged on the inner side of the case, a top cover is fixed at the upper end of the case, a feed port is arranged inside the top cover, a water tank is arranged on the inner side of the case and positioned at the upper end of the crushing roller group, and a water pump is arranged at the upper end of the top cover. A water guide straight pipe is rotationally connected to the center of the lower end of the top cover in the case, a plurality of nozzles are connected to the outer side of the water guide straight pipe and located on the inner side of the case, a water pumping port of the water pump is fixedly connected with a water pumping pipe, and a water outlet of the water pump is fixedly connected with a water outlet pipe. According to the construction engineering garbage crusher provided by the utility model, due to the integral structural matching design, when construction garbage is crushed by the crushing roller group on the inner side of the case, dust falling treatment can be carried out on smoke dust generated by the construction garbage, and the pollution of the smoke dust to the environment is effectively reduced.

The invention provides a construction waste cyclic crushing and screening method based on multi-mode AI analysis, and belongs to the technical field of construction waste treatment.The method comprises the steps that a to-be-crushed substance is conveyed to first-stage crushing equipment through a conveyor, the weight of magnetic metal is estimated in combination with electromagnetic induction scanning, the magnetic metal is separated after being crushed, the actual weight is detected, and the weight difference value delta G is calculated; the particle size D / D and the particle proportion P before and after crushing are obtained based on visual identification, and a multi-parameter crushing effect model is constructed to evaluate the crushing sufficiency; and parameters of the first-stage crushing equipment are dynamically adjusted, and qualified finished products are output through cooperation of circulating crushing and screening. Precise evaluation of the crushing sufficiency and intelligent parameter adjustment are achieved through multi-mode AI analysis, the metal residue rate is reduced to a low level, unit energy consumption is obviously reduced, the finished product percent of pass is increased to a high level, and the method is suitable for large-scale treatment scenes of construction waste.

The invention relates to an anti-crack fully-recycled aggregate road water-stable layer material and a preparation method thereof. The fully-regenerated road water-stable layer is prepared from the following raw materials in parts by mass: 6 parts of binding material: 94-10: 90 parts of aggregate, 2-8 parts of ordinary Portland cement, 0-2 parts of industrial solid waste and 0-2 parts of regenerated micro powder, and the binding material is added into the regenerated aggregate according to a certain proportion and uniformly mixed to obtain the fully-regenerated aggregate road water-stable layer material. According to the invention, industrial by-products fly ash, slag powder, silica fume and the like are used as main raw materials, and building waste, road demolition waste, tailing sandstone and the like are used as main raw materials, so that the water-stable material has high strength and durability, can overcome the defects of high energy consumption and easy cracking of a traditional water-stable material, and has the advantages of easily available materials, low cost, simple preparation process and wide application prospect. The requirements of actual engineering construction are met, and the economic, social and environmental benefits are remarkable.

The invention relates to the field of application of methods and systems for filling, sealing and discarded (abandoned) salt rocks, in particular goaf located in a heterogeneous salt structure (in which a porous / permeable formation is present), or a goaf close to a geological fault, or even a goaf experiencing collapse at the top of the goaf, or in particular a goaf in a non-homogeneous salt structure (in which a porous / permeable formation is present), or even a goaf undergoing collapse at the bottom of the goaf. These can be performed simultaneously with and integrated with the disposal of field facilities. More specifically, the invention is used for the disposal of civil engineering structures in rock salt production and / or storage sites by applying a dissolution mining process, where the goaf needs to be filled by filling solid material, where the recovered solid material is produced by comminuting demolition waste from the disposal civil engineering structures (in-situ) or other areas of the project facility, and where the solid material is recovered from the disposal civil engineering structures (in-situ) or other areas of the project facility. Through its on-site or off-site mobile recovery device (grinding / comminution / screening), larger particle size waste (gravel) is added to the bottom of the SRC, while smaller particle size waste (sand) is added at the end of SRC filling to block voids and faults.

The present invention relates to a method for recycling concrete from construction and / or demolition, the method comprising at least one step of subjecting concrete blocks to microwave treatment, at least one mechanical treatment step, and at least one step of carbonating recycled aggregates and / or recycled fine powder, a recycling facility for carrying out the method, and recycled aggregates obtained by microwave treatment and mechanical treatment of concrete blocks.

The utility model belongs to the technical field of building engineering, especially related to a building engineering waste treatment equipment, include: support frame, support frame one end rotatory connection gear two, support frame upper end fixed cylinder, cylinder inner chamber rotatory connection auger blade one, cylinder one side rotatory connection mounting disc two, mounting disc two sleeve gear one, and fixed, gear one and gear two meshed connection, mounting disc two one side install sieve rod, sieve rod one end install mounting disc one, auger blade one one end fixed auger blade two. The utility model has the spiral conveying and the rotary screening integrated structure realization building waste's continuous processing and classification, convenient to adjust the screening size simultaneously, save time and labour, has improved the work efficiency's advantage.

The application discloses a kind of based on RDSA-DeepLabV3+ Network's construction waste annual output actuarial method, obtains GF-2 remote sensing data, data is stored, registration, cutting and annotation etc. Preprocessing, based on RDSA-DeepLabV3+ Network is segmented to building and construction waste sink data set, and semantic segmentation model is constructed.Secondly, the data of the same area at different times is segmented using the segmentation model, and the construction waste volume change is detected for two consecutive years of remote sensing image of the study area, the construction waste yield is calculated, the change of building in the study area for two consecutive years is compared, the newly added or reduced building area is obtained, and the construction waste and demolition waste is further calculated.The annual output of urban construction waste can be accurately calculated by the above three indicators.The application can realize the actuarial calculation of urban building area, effectively grasp the change of urban building, and has important significance for promoting intelligent supervision of urban construction waste and rational scheduling of urban resources.

The invention relates to the technical field of solid waste treatment, in particular to a building demolition waste steel recovery treatment device which comprises a treatment table, a monitoring part and a second annular plate, a traction part is arranged on the treatment table, and the second annular plate and the monitoring part are coaxially arranged on the treatment table; the crushing sections of the crushing assemblies are always kept perpendicular to the axis direction of the treatment table in the moving process; the self-adaptive steam injection assembly is used for synchronously injecting hot steam when the crushing assembly crushes the concrete on the surface of the reinforcing steel bar, and the steam injection amount of the self-adaptive steam injection assembly is gradually increased along with increase of the radial outward moving distance of the crushing assembly; according to the installation design that the crushing assembly is perpendicular to the axis direction of the steel bars, crushing force can completely act on the combination face of the concrete and the steel bars, compared with a traditional inclined or deflection force application mode, the pressure intensity borne by the concrete under the same acting force is higher, the attached concrete can be rapidly crushed, and force loss is reduced.

The invention relates to the technical field of bridge demolition and maintenance engineering, and discloses bridge demolition waste treatment equipment and a method thereof.The bridge demolition waste treatment equipment comprises a rack and a magnetic roller, a rotating shaft is fixedly connected to the outer wall of the magnetic roller, a reinforcing strip is fixedly connected to the bottom of the rack, and an adjusting mechanism is arranged on the outer side of the rotating shaft; an adjusting mechanism is arranged on the rack and used for adjusting the intensity of a magnetic field of the magnetic roller, a cleaning mechanism is arranged on the outer side of the rack and used for cleaning scraps remaining on the magnetic roller, an auxiliary mechanism is arranged at the bottom of the rack and used for assisting the device in moving, and the adjusting mechanism comprises a matrix plate. According to the invention, the intensity of the generated magnetic field can be flexibly controlled by adjusting the current to the electromagnetic block, and the magnetic field can drive the phase column to generate displacement so as to change the distance between the magnetic system and the magnetic roller, so that the continuous adjustment of the magnetic field intensity on the surface of the magnetic roller is realized, and a basis is provided for efficiently sorting materials with different magnetisms.

The invention discloses a carbon emission calculation method for an existing building decoration and renovation construction process, and the method comprises the steps: dividing the existing building decoration and renovation construction process into a plurality of key sub-processes, the plurality of key sub-processes comprise a dismantling process, a dismantling waste transportation process, a dismantling waste backwater treatment process, a building material production process, a building material transportation process and a repairing construction process; determining an emission factor based on the plurality of key sub-processes; establishing a carbon emission model according to the emission factor and a carbon emission factor method, wherein the carbon emission model is C = Cgc + Cys + Chs + Csc + Cjc + Csg; and calculating carbon emissions of the plurality of key sub-processes based on a carbon emission model. The problem that the carbon emission in the transformation construction process cannot be accurately simulated by a carbon emission technical method for the existing building transformation construction process is solved.

There is disclosed a process for converting concrete obtained from construction and demolition waste (CDW) and / or from returned concrete (RC) from ready mix concrete trucks and / or other mineral materials into reactive supplementary cementitious materials. The process comprises obtaining crushed recycled concrete, in the form of recycled concrete aggregates (RCA) and fine recycled concrete aggregates (FRCA), and / or crushed mineral material other than recycled concrete. The process further comprises subjecting the recycled concrete and / or the crushed mineral material to one or both of (i) mechanical calcination, and (ii) dry coating with SSCM, to form the reactive (pozzolanic or hydraulic) SCM.

The invention discloses a building demolition waste steel recovery treatment device which comprises a separation box, and a decomposition mechanism is arranged in the separation box; the separation box is of a frame structure with left and right openings; the fixing mechanism is arranged in the separation box, and the decomposition mechanism comprises a second double-thread cylinder, a second threaded rod, a decomposition ring and a second gear; concrete is heated and expanded through the high-temperature heating crushing part, then the decomposition ring is rotated by 180 degrees through the driving wheel, then the surface of the concrete is crushed through the beating part, and the steel is not damaged due to the heating mode of the crushing part, so that complete crushing of the steel is completed; steel and iron are adsorbed and recycled through a magnetic attraction device after crushing, concrete falls into a material box, lifting of a second double-thread cylinder and a second thread rod and separation from a first gear are achieved through a telescopic rod, the later decomposition ring adjusting function is achieved, the concrete multi-point crushing and heating function is completed, and the recycling efficiency is improved; and automatic work is realized.

This utility model provides a construction waste crusher, belonging to the field of waste treatment. It includes a shell, an adjustable crushing component, a dustproof component, and a compression component. In operation, the adjustable crushing component and dustproof component allow construction waste to be input via an external conveyor belt. A first motor drives a first crushing column to crush the waste. A limit block limits the movement of a nut. Rotating the nut moves a threaded column, a sliding column, a U-shaped plate, the first motor, and the first crushing column, allowing for adjustment of the crushing space according to the size and hardness of the materials to be crushed, preventing jamming. A sliding chamber facilitates the sliding of the first motor. A water tank stores water, which is pumped out by a water pump and sprayed out by a water sprayer to limit dust during the crushing process, achieving environmental protection and worker health protection.

The invention relates to the technical field of construction waste treatment, and discloses a steel bar-concrete demolition waste intelligent identification method for blasting demolition, and the method comprises the following steps: obtaining time sequence process image data and static form picture data of blasting demolition, and carrying out the correlation; a quantitative standard (S1 / S2 / S3) of the separation degree is defined, multi-modal data is labeled to generate a feature data set, time sequence features extracted from time sequence data and spatial features extracted from static data by an intelligent recognition model are constructed and trained, and a target detection result and a separation degree evaluation result are output based on the time sequence features and the spatial features. And the deployment model performs reasoning on the real-time image, and generates and executes a differentiated sorting instruction for the automatic sorting equipment based on a separation degree evaluation result. According to the method, the dynamic process and the static form information are fused, so that the accuracy of separation state evaluation is improved, closed-loop automatic separation from intelligent sensing to differentiated execution is realized, and the working efficiency is improved.

The present disclosure concerns a method for upcycling construction and demolition (C&D) debris, resulting upcycled products and uses therefrom. The method comprises separating the debris into a first, silicon-enriched population of inorganic waste particles and a second, calcium -enriched population of inorganic waste particles, each population of inorganic waste particles comprises, independently, a plurality of inorganic compounds including at least silicon containing compounds, calcium containing compounds and aluminum containing compounds; wherein the silicon-enriched population of inorganic waste particles is characterized by (i) particle size distribution (PSD) of DIO of between about 30 micron and about 50 micron and D90 of between about 55 micron and about 70 micron; and (ii) silicon containing compounds to calcium containing compounds weight ratio of at least 5.5; and wherein the calcium-enriched population of inorganic waste particles is characterized by (i) particle size distribution (PSD) of D90 of between about 20 micron and about 45 micron; and (ii) silicon containing compounds to calcium containing compounds weight ratio of below 5.5.

The application discloses a kind of based on construction waste precise resource utilization structure and its utilization method, belong to construction waste utilization technical field.The application includes fixed transfer system, the fixed transfer system is by topsoil area, engineering spoil area, demolition waste area, engineering waste area and decoration waste area composition.Its steps are:step one: in the early stage of project construction first investigation, formulate corresponding plan;Step two: the project is staged, zoned construction, reduce engineering spoil production;Step three: set fixed turnover site in the scope of land, demarcate topsoil, general earthwork, rock's stacking area;The application can be used as the utilization, disposal mode of bulk construction waste in the aspect of precise utilization of construction waste, so as to reduce the random stacking and abandonment of construction waste in the site, and also avoid the situation that earthwork has no reasonable direction after the start of the project, is randomly stacked and abandoned.Precise utilization can reduce the secondary transport of construction waste.

A method for manufacturing hydraulically hardening building materials, includes the steps of:providing concrete demolition waste with a maximum particle size of up to 150 mm as a starting material,mixing the starting material with water to form a feedstock slurry,introducing carbon dioxide or a precursor thereof into the feedstock slurry to form carbonated concrete fines in an amount from 1 to 100 wt.-% of the hardened binder contained in the starting material and to detach the concrete fines from the aggregate contained in the starting material to form a product slurry, andmixing the product slurry with a cement forming the building material,and use of the obtainable building material for manufacturing building structures as well as method for manufacturing a supplementary cementitious material slurry.

The utility model relates to a double air-tight seal waste bin structure which comprises a first air-tight seal strip, a second air-tight seal strip, a waste bin, a waste bin cover and a mounting flange. The upper end of the outer wall of the waste bin is connected with the mounting flange, the second air-tight sealing strip is arranged between the lower end of the inner wall of the mounting flange and the outer wall of the waste bin, and an upper port of the mounting flange is connected with the waste bin cover; and a first air-tight sealing strip is connected between the upper end of the inner wall of the mounting flange and the outer wall of the waste bin cover. Annular square grooves are formed in the upper end and the lower end of the inner wall of the mounting flange correspondingly, and the first air-tight sealing strip and the second air-tight sealing strip are located in the annular square grooves correspondingly. The utility model aims to provide the double-air-seal waste bin structure for overcoming the existing defects, the sealing performance of an isolator cabin body cannot be influenced, and sterile production or sterile inspection work can be continuously carried out after the waste bin is dismounted.

The embodiments herein are directed to dry wall waste mixtures, formed under pressure into example embodiments referred to herein as dry wall waste blocks (DWBs) and / or gypsum wallboard waste blocks (GWWBs) and tile structures. DWBs / GWWBs mixtures in particular, often incorporate a higher percentage in the composite mixtures from about 60% up to 85% of dry wall waste than other mixtures and beneficially often incorporates substantially all of the wallboard facing paper as part of the composite mixture. That is, waste processing is simplified by comingling core and paper layers in the final product. DWBs / GWWBs mixtures utilize demolition and construction waste, replacing a high percentage of Portland cement with waste-derived binder.

This invention relates to a lightweight material air separator for construction or demolition waste, comprising a casing with a feed inlet on the top side, an air outlet on the side wall, and a discharge outlet at the bottom. A filtration mechanism is located at the air outlet, and a conveying and air-closing mechanism is located at the bottom of the casing near the discharge outlet. The innovation lies in the following: the filtration mechanism includes a flange housing, a geared motor, and a disc filter screen. The flange housing is located at the air outlet and is detachably connected to the outer wall of the casing. The disc filter screen is located at the air outlet, and the geared motor is located on the outer wall of the flange housing, with its power output shaft connected to the disc filter screen. An air outlet chamber is located in the upper part of the flange housing and communicates with an air intake on the flange housing. This invention simplifies the product structure, not only preventing the entanglement of long, thin lightweight materials but also reducing operational failure rates and manufacturing costs.

A method for recycling concrete waste from construction and / or deconstruction, including at least one step of microwave processing of concrete blocks, at least one step of mechanical processing, and at least one step of carbonation of recycled concrete aggregates and / or recycled concrete fines; and a recycling installation for carrying out the recycling method and to recycled concrete aggregates obtained by the steps of microwave processing of concrete blocks and mechanical processing.

The present invention pertains to the field of methods and systems for filling, sealing and abandoning (decommissioning) caves built in salt rock, especially one located on an inhomogeneous salt structure (with the presence of layers of porous / permeable rock within the salt layer), or close to geological faults, or in which the cave roof has collapsed, which can take place simultaneously and integrated with the decommissioning of the facilities on the site of the venture. The present invention is more particularly used in the decommissioning of civil constructions on sites for production of rock salt, and / or its storage, by the dissolution mining method, in which the cave must be filled by backfilling it with solid material, the recycled solid material being generated by means of the comminution of demolition waste from the decommissioned civil constructions of the facilities of the venture (on site), or from other areas, via a mobile recycling plant (crushing / grinding / sifting) on site or not.. The larger grain size waste (gravel) is placed at the bottom of the salt rock cave and the smaller grain size waste (sand) is placed at the end of the salt rock cave to fill in the voids and gaps.

The invention provides a building demolition garbage tailing lightweight thermal insulation building block / thermal insulation wallboard and a preparation method thereof, and relates to the technical field of waste resource utilization. The building demolition garbage tailing lightweight thermal insulation building block / thermal insulation wallboard provided by the invention is prepared from the following raw materials: ordinary Portland cement, building demolition garbage tailing powder, water, a water reducing agent and a nano foaming agent. The building demolition garbage tailings comprise waste concrete, waste bricks, waste gypsum and the like which are complex in components and difficult to treat, active components in the building demolition garbage tailings are fully utilized, a hydration reaction can be carried out under the action of an exciting agent to generate a hydration product, and the internal binding power of the material is enhanced; and the nano foaming agent is adopted and has good stability, early coagulation of the slurry can be achieved, foam collapse is effectively avoided, and the strength of the building demolition garbage tailings is improved. According to the invention, the building material with excellent thermal insulation performance is developed by utilizing the building demolition garbage tailings, so that the consumption of natural resources is reduced, and the pollution of wastes to the environment is reduced.

A frame type disposal line for building demolition waste comprises a rack, a feeding grading device, a winnowing device and a sorting device, wherein the feeding grading device, the winnowing device and the sorting device are sequentially arranged in the waste conveying direction. The grading device comprises a feeder used for receiving the building demolition waste and a screening machine connected with the feeder and used for screening the building demolition waste, and coarse aggregate, fine aggregate and muck are obtained after the building demolition waste is screened by the screening machine; the winnowing device comprises a first belt conveyor, a second belt conveyor, a first winnowing machine and a second winnowing machine, the first belt conveyor and the second belt conveyor are arranged up and down, the first winnowing machine and the second winnowing machine are opposite to the first belt conveyor and the second belt conveyor respectively, the first belt conveyor is used for receiving coarse aggregate, and the second belt conveyor is used for receiving fine aggregate; the sorting device is connected with the discharging end of the first belt conveyor and is used for sorting the entered coarse aggregate and removing impurities in the coarse aggregate to obtain inorganic coarse aggregate; the disposal line has the characteristics of modularization and integration, the equipment installation period and the occupied area are saved, and the investment cost is reduced.