508 results about "Cement paste" patented technology

The invention relates to the technical field of refractory materials, in particular to a waste magnesia-calcium brick-containing refractory material and a preparation method thereof, and the waste magnesia-calcium brick-containing refractory material comprises the following components: composite aggregate, calcium aluminate cement, urea resin-aluminum dihydrogen phosphate, active alpha-Al2O3 micro powder, silica micro powder and sodium tripolyphosphate. In the room-temperature spraying maintenance and low-temperature working stage, hydration of free CaO in the waste magnesia-calcium bricks and erosion of OH <-> are prevented through the hydrophobic effect of fluorinated polyphosphazene and modified zirconium oxide sol, and the compatibility and wettability of the composite aggregate and cement paste are improved through carboxylic acid groups of carboxyethyl silanetriol and polyethylene glycol monomethyl ether. According to the present invention, with the temperature rising, the aluminum dihydrogen phosphate forms the viscous liquid phase to wrap the aggregate so as to provide the temporary protection, the temperature continues to rise, the zirconium oxide and the nanometer Al2O3 react with the CaO and the MgO to generate the CaZrO3 and the MgAl2O3, the aluminum dihydrogen phosphate reacts with the nanometer Al2O3 in the system to generate the AlPO4, and the CaZrO3, the MgAl2O3 and the AlPO4 form the multi-phase fire-resistant structure so as to further improve the fire resistance of the fire-resistant material;

The invention discloses a microscopic crack dynamic in-situ characterization method, and relates to the technical field of crack in-situ detection. According to the method, a plurality of hardened cement paste bodies are soaked in a sulfate solution, the porosity development trend of the hardened cement paste bodies is obtained through a nuclear magnetic resonance test and a mercury injection test in the soaking process, a test sample and a test sample are prepared after soaking is finished, and the crack propagation length of the test sample is measured through a scanning electron microscope. According to the distance gradient between the sampling angle of the test sample and the exposed surface, space coordinates of crack cracking are converted into a time process along the center axis of the test sample, a delay microscope is established on the microscale, and the test sample is scanned by using X-ray computed tomography equipment in a matched mode; a crack propagation animation image is formed based on a crack form between adjacent X-ray tomography slices, and a crack development process is obtained by continuously capturing high-resolution images, so that omission of time information is avoided, and in-situ detection of microscopic cracks in a hardened cement paste sample is realized.

The invention relates to the technical field of drilling compositions, in particular to a composite plugging agent, a plugging composition and plugging cement paste for shale gas formation cracks. The composite plugging agent for shale gas stratum cracks is composed of a bridging material, a filling material and an end-capping material, the mass ratio of the bridging material to the filling material to the end-capping material is (1.2-1.4): 0.5: (0.1-0.3), the bridging material is organic fibers with the length of 3-5 mm, the filling material is composed of inert particles with the particle size of 35-280 [mu] m and micro-silicon with the particle size of 0.15-1 [mu] m, and the end-capping material is a mixture of silicon oxide and silicon oxide. The end-capping material is composed of organic fibers with the length of 8-9 mm and walnut shells with the particle size of 3-5 mm. Through compounding of different types of bridging materials, filling materials and end sealing materials and grading of fibers with different lengths and plugging particles with different particle sizes, the plugging agent can be matched with cement paste in complex cracks and large cracks (1-4 mm) of a stratum to form a stable and compact plugging layer, the compressive strength is high, effective retention is achieved, and the effect of plugging a complex leakage layer is achieved.

The invention discloses a rapid tool lifting system for road and bridge construction. The rapid tool lifting system comprises a rail and a sliding table installed on the rail in a sliding mode. The driving mechanism is fixedly mounted on the sliding table; the lifting mechanism is mounted at the upper end of the driving mechanism; the connecting seat is fixed at the lifting end of the lifting mechanism; the lifting mechanism is fixedly mounted at the front end of the connecting seat; and the winding mechanism is detachably mounted at the upper end of the connecting seat. The rainproof cloth which can be controlled by the rolling mechanism is arranged on the outer side of the lifting mechanism, so that the flexible protective cover which can be opened and closed is formed, when the tool is lifted and moved, the rainproof cloth can be put down, a wrapping space is formed, the tool is effectively prevented from colliding and scraping with a surrounding bridge structure (such as a pier, a guardrail and a box girder), and the service life of the tool is prolonged. And meanwhile, most of pollutants such as dust and cement paste can be isolated, cleaning of tools and a lifting mechanism is protected, and the service life of equipment is prolonged.

The invention discloses a seabed shallow casing section thermal insulation structure for polar region supercritical carbon dioxide drilling, which comprises a casing, a thermal insulation coating, a protective coating, an annular cement slurry layer, an electric heating pipe, a sensor module, a wireless conductive module, a ground system and a seabed wireless transmission module, and is characterized in that the electric heating pipe is fixed on the outer wall of the casing through a hoop; the outer wall of the casing pipe is sequentially coated with a heat preservation coating, a protective coating and an annular cement paste layer from inside to outside, the wireless conductive module is integrated at the end of the casing pipe, and the ground system comprises a ground data acquisition system and a ground control center. The sea surface platform is provided with a ground data acquisition system and a ground control center which are connected with the seabed wireless transmission module through an umbilical cable, and temperature and pressure data acquired by the sensor module are uploaded to the ground control center. According to the invention, the problems of rapid heat loss, annular air channeling, casing mechanical property degradation, poor drilling fluid fluidity and the like of the seabed shallow casing section in the polar region extreme low-temperature environment are solved.

The invention belongs to the technical field of deep foundation pit supporting, and discloses a deep foundation pit gushing water emergency plugging anchor rod and a construction method thereof.The deep foundation pit gushing water emergency plugging anchor rod comprises an anchor rod body, and a conical head is fixed to the head of the anchor rod body; a quick-setting cement bag is connected to the periphery of the anchor rod body on the rear side of the conical head, and quick-setting cement is contained in the quick-setting cement bag; the outer side of the quick-setting cement bag and the periphery of the anchor rod body are wrapped with a water-soluble isolating membrane; the outer side of the water-soluble isolating membrane is wrapped with a super absorbent resin layer, and the super absorbent resin layer is used for absorbing water to expand and block the anchor rod drill hole. When water bursts suddenly in the anchor rod drill hole, the super absorbent resin layer swells rapidly after meeting water to fill a gap between the hole wall of the anchor rod drill hole and the anchor rod body, meanwhile, the quick-setting cement bag can be broken through extrusion, the quick-setting cement and the bursting water are mixed to generate cement paste to fill the outer side of the conical head, finally, a solidified body is formed, and through double plugging, the water bursting effect is improved. The gap between the anchor rod body and the anchor rod drill hole is filled, the anchor rod drill hole can be blocked in time, the hole collapse risk is reduced, and meanwhile the blocking efficiency is improved.

The invention provides a concrete waste crushing particle size distribution analysis method and device, and the method comprises the steps: obtaining concrete waste image data, extracting a particle contour and geometric parameters through image recognition, determining a particle contact point displacement feature, and recognizing a stress concentration region migration path. Obtaining a particle morphology data set containing stress transfer path deflection information; performing gray value processing on the particle surface image, identifying a cement paste stripping area caused by shear stress component change through brightness difference to obtain interface stripping stress state distribution information, and calculating shear breaking ultimate strength distribution characteristics based on stress transfer path deflection information; and fuzzy clustering processing is carried out on the particle data set, if boundary fuzzy particles exist, crushing force transmission characteristics of the boundary fuzzy particles are obtained according to mechanical response time-frequency analysis, and the crushing risk level of the boundary particles is identified in combination with a particle internal crack initiation force threshold.

The application discloses a high-value resource utilization system and method of waste concrete, and the system comprises a preheating subsystem, a calcining subsystem, a cooling subsystem, a separating subsystem, a crushing subsystem, a dust collecting subsystem and a conveying subsystem. Waste concrete which is coarsely separated and pre-homogenized is mixed into cement raw materials to produce silicate cement clinker, and the test block after coarse crushing, screening, fine crushing and screening is directly stripped, and the separated powder can be used as a mixing material; the test block after stripping is preheated and calcined in a rotary kiln, the obtained material is cooled and stripped, and then sent into a V-type powder separator to separate coarse aggregates, and the fine aggregates and recycled waste concrete micro powder are separated through the powder separator and a dust collector. The application realizes the synergistic effect of pollution reduction and carbon reduction by combining with a cement production line, separates fine aggregates, coarse aggregates and hardened cement paste in the waste concrete, and realizes the high-value resource utilization of the waste in multiple ways according to the characteristics of each component.

The application provides a kind of concrete chloride ion diffusion coefficient prediction method based on aggregate gradation, comprising the following steps: obtaining the chloride ion diffusion coefficient D ref Of cement paste;Obtaining the specific surface area s i Of aggregate in each particle size interval;Obtaining the thickness of concrete interfacial transition zone;Calculating the chloride ion diffusion coefficient of concrete.The application considers the influence of all components (cement paste, aggregate, interfacial transition zone) on chloride ion diffusion coefficient from the composition of concrete, and the influence of aggregate particle size on the thickness of interfacial transition zone, and the prediction result has high accuracy, which can provide effective reference for the evaluation of concrete resistance to chloride ion erosion.

The invention discloses preparation and application of a pH-responsive slow-release hydration heat inhibitor, and belongs to the technical field of concrete admixtures. The inhibitor is slowly released in a cement paste alkaline environment, cement hydration is continuously slowed down, and the temperature cracking risk of concrete caused by hydration heat is reduced. The core component is a pH sustained release microsphere, and the pH sustained release microsphere is composed of octadecyl acrylate, Span 80, Tween 60, white oil, acrylic acid, allyl polyoxyethylene ether 500, N, N-methylene bisacrylamide, deionized water, tert-butyl hydroperoxide, sodium pyrosulfite and the like. The preparation method comprises the steps of mixing an oil phase and a water phase, emulsifying, reacting and the like. The inhibitor further comprises sorbitol and methanol, and is prepared through the steps of stirring, filtering, drying and the like. The inhibitor can effectively reduce the hydration heat of cement, delay the setting time and improve the compressive strength of concrete.

The invention belongs to the technical field of concrete, and particularly relates to carbon dioxide foam concrete as well as a preparation method and application thereof. Comprising the following steps: obtaining a gel raw material comprising cement, a nano filler and a mineral admixture, and preparing the gel raw material into cement paste; the preparation method comprises the following steps: preparing a foaming solution from a hydrogel thickener, a water repellent agent, a foaming agent and water, and introducing gas containing carbon dioxide to prepare carbon dioxide foam; carbon dioxide foam and cement paste are mixed to prepare mixed paste, and the mixed paste is formed to obtain a formed concrete blank; and performing internal carbonization curing and external carbonization curing on the concrete green body, and performing natural curing to obtain the carbon dioxide foam concrete. Through internal and external carbonization maintenance, a large amount of carbon sequestration is realized, micropores are filled by virtue of a product generated by carbonization, the aperture is refined, the collapse of a foam structure is reduced, the foam concrete is enhanced, the compressive strength and durability of the carbon dioxide foam concrete are improved, and the durability of the carbon dioxide foam concrete can be enhanced.

The invention discloses a foam light soil upright roadbed pouring method, and belongs to the technical field of upright roadbed construction, a raw material proportioning processing module and a pouring processing module are included, a foaming agent diluent is prepared into foaming liquid through a physical method, then compressed air is injected into the foaming liquid to prepare foam, and the foam light soil upright roadbed is formed. The foam, the cement, the active admixture, the water, the additive, the sandy soil and the industrial waste residue material are mixed and stirred according to a preset proportion to prepare a to-be-poured mixed solution, the to-be-poured mixed solution is conveyed to a pouring area through a pipeline, and layer-by-layer pouring is carried out. The method is designed for the situation that the high-fill soft soil upright roadbed is prone to collapse, cement paste and foaming foam are prepared and poured into the upright roadbed according to the preset proportion, layer-by-layer pouring is adopted, EPS foam plates are used for partitioned pouring, the pouring quality is guaranteed, meanwhile, the pouring efficiency can be remarkably improved, and the construction period is shortened; and the longitudinal and transverse gradients are adjusted by using a base material, so that the slope surface of the whole upright roadbed meets the design requirements.

The invention discloses a device and method for evaluating the sealing performance of a shaft under the geological storage in-situ condition of carbon dioxide, and the device comprises a corrosion shaft test module, a carbon dioxide displacement module, a gas channeling simulation module, a shaft temperature and pressure control module and a stratum temperature and pressure control module. The shaft assembly is arranged in the testing shell in a penetrating mode, closed cavities are formed between the top end of the shaft assembly and the top end of the testing shell and between the bottom end of the shaft assembly and the bottom end of the testing shell, and a gas flow meter is installed at the top end of the testing shell. And a confining pressure bin and a heating bin are sequentially arranged in the test shell in the radial direction away from the shaft assembly. The device can simulate the lithology-temperature-pressure-carbonic acid environment in the geological storage process of carbon dioxide, and the sealing capacity of a shaft under the in-situ service condition is evaluated; therefore, the purposes of optimizing the formula of the cement paste, optimizing the material of the sleeve and reducing the risk of carbon dioxide leakage are achieved.

The invention relates to polyformaldehyde fiber concrete based on a stud area of a steel box girder, and belongs to the technical field of building materials. The polyformaldehyde fiber concrete comprises the following components in parts by weight: 400-550 parts of cement; 80 to 180 parts of water; 1000 to 1100 parts of coarse aggregate; 700 to 780 parts of fine aggregate; the surface of the calcium sulfate whisker is coated with a silane coupling agent. The polyformaldehyde fibers and the calcium sulfate whiskers are added into the concrete at the same time, the calcium sulfate whiskers are doped to provide a framework support for the concrete, after the calcium sulfate whiskers are wrapped by the cement paste, the calcium sulfate whiskers and other materials jointly form a three-dimensional supporting structure, and concrete pores can be filled with part of the whiskers, so that the compactness and compressive strength of the concrete are enhanced. The polyformaldehyde fibers are added, so that stress can be effectively dispersed, when the concrete is pressed, the polyformaldehyde fibers and a cement matrix bear loads together, the stress concentration phenomenon is reduced, and the compressive strength of the concrete is further improved.

The invention relates to the technical field of civil engineering material preparation and testing devices, in particular to a hole forming method and mold for a reserved drill hole of a laboratory cement test piece, the hole forming method for the reserved drill hole of the laboratory cement test piece comprises the steps that a test piece mold is assembled, and the test piece mold comprises a mold body and a sealing piece; preparing cement paste or concrete according to preset requirements and a formula of a cement test piece required by an experiment, pouring the cement paste or the concrete into the test piece mold, vibrating the cement paste or the concrete in the mold, curing the test piece according to conventional requirements, and determining the strength of the cement test piece according to the setting time and the strength increasing curve of the cement test piece. And taking out the core rod in a time period from initial setting to final setting of the cement test piece, cleaning the hole by using clear water or weak-pressure airflow, and continuously curing according to conventional requirements until the cement test piece is completely hardened. According to the hole forming method for the reserved drill hole of the laboratory cement test piece, secondary disturbance to the test piece body is reduced, and the accuracy and repeatability of an experimental result are guaranteed.

The invention provides an oxidation active zone remediation system and method for underground water organic pollution. The remediation system comprises a plurality of injection wells and monitoring wells which are arranged at the downstream of an underground water pollution plume; the injection wells are distributed in rows at equal intervals in the direction perpendicular to the underground water flow field, the adjacent injection wells in the same row are distributed at equal intervals, and the injection wells in the adjacent rows are distributed in a staggered mode. The monitoring wells are arranged at upstream and downstream positions of an oxidation active zone formed by the injection wells; the injection well is of a double-well structure and comprises an inner well and an outer well. The inner well and the outer well are slotted floral tubes, a repairing agent is injected into the inner well, and the space between the inner well and the outer well is filled with a slow-release repairing material; and the outer side of the outer well is provided with a well wall formed by filling quartz sand filter materials, sodium bentonite particles and anti-seepage cement paste from bottom to top. According to the remediation system, through the reasonable structural design and application of the remediation agent and the slow-release remediation material, an oxidation activity reaction zone can be rapidly established, underground water pollution diffusion is efficiently blocked, and rapid and effective remediation of underground water is achieved.

The invention discloses a quality detection management system and method for a water conservancy project, and relates to the technical field of quality detection management. The quality detection management system for the water conservancy project comprises an early warning timeliness evaluation module, an early warning optimization effectiveness judgment module and an information integration optimization module. Whether early warning is carried out or not is judged through the state factors of the concrete mixer, if yes, fault early warning timeliness evaluation is carried out, and whether fault early warning optimization is carried out or not is judged, if not, the working state of the concrete mixer continues to be monitored, and then whether management information integration effective judgment is carried out or not is judged based on the cement paste density standard deviation. And finally, whether management information integration optimization is carried out or not is judged based on a management information integration effectiveness judgment result, so that the fault early warning effectiveness in the quality detection management of the water conservancy project is improved. The problem of low effectiveness of fault early warning in quality detection management of water conservancy projects due to asynchronization between data acquisition and transmission in the prior art is solved.

The invention discloses a full-automatic cement setting time determinator and a determination method thereof, and belongs to the technical field of cement setting time determination. The determinator comprises a constant temperature and humidity chamber and an electric cabinet, an initial setting time determination device and a final setting time determination device are respectively arranged in the constant temperature and humidity chamber, the electric cabinet is arranged on the constant temperature and humidity chamber, a controller is arranged in the electric cabinet, a touch screen is arranged on an opening in the side wall of the electric cabinet, and the touch screen is connected with the controller. And the controller is electrically connected with the constant temperature and humidity chamber and the touch screen. All the two test molds filled with cement paste can be simultaneously put into the constant-temperature and constant-humidity chamber for curing, so that the whole cement setting time measuring period is remarkably shortened, the measuring efficiency is improved, and full-automatic cement setting time measuring is really realized; the test mold and the to-be-tested piece on the inner side of the test mold do not need to be overturned in the testing process, so that the whole testing process is safely and smoothly carried out; the whole cement setting time determination process is simple, the determination period is short, and the determination efficiency is high.

The invention belongs to the field of cement paste for well cementation of oil and gas wells, and particularly relates to medium-high temperature anti-gas channeling cement paste. The medium-high temperature anti-gas channeling cement paste comprises water and the following raw materials in parts by weight: 100 parts of oil well cement, 35-40 parts of a high-temperature strength stabilizer and 2-3 parts of an anti-gas channeling agent, the high-temperature strength stabilizer is prepared from SiO2 with the particle size of 75 to 100 mu m, SiO2 with the particle size of 23 to 38 mu m and SiO2 with the particle size of 0.1 to 10 mu m according to the mass ratio of 10 to (20 to 21) to (1.2 to 1.5); the anti-gas channeling agent is a copolymer of 2-acrylamide-2-methylpropanesulfonic acid, acrylamide and N, N '-dimethylacrylamide. The cement paste disclosed by the invention has relatively high fluidity, relatively good defoaming property, relatively high gas channeling prevention performance and relatively high high-temperature stability, has relatively high strength and gas channeling prevention performance after well cementation, can prevent the gas channeling problem of well cementation, and improves the well cementation quality.

The utility model discloses a stirring dust removal mechanism of a concrete stirring station, which belongs to the field of concrete stirring station equipment and comprises a stirrer, a dust removal water tank and a track which are arranged in the concrete stirring station. The stirrer is fixedly mounted in the protective frame, and rollers are mounted at the bottom of the protective frame and placed on the rails in a matched manner; an exhaust hole and a water inlet hole are formed in the top of the stirrer, and the tail end, connected with an exhaust pipe, of the exhaust hole extends into the dust removal water tank; the water inlet is connected with the tail end of the water pumping pipeline and extends into the dedusting water tank. According to the dust removal device, dust can be effectively removed, and sewage generated in the using process, such as waste water generated by cleaning a cement paste mixer and a concrete mixing main machine, is recycled into the dust removal water tank and is reused, so that the problems of dust raising and waste recycling in the processing process are well solved; the dust removal water tank can remove dust and can also play a role in water storage, and the problem that a water storage tank is additionally arranged is solved.

The invention discloses a novel cast-in-place concrete pile post-grouting technology. The novel cast-in-place concrete pile post-grouting technology comprises the following steps that S1, grouting device parts are prepared and assembled; s2, the assembled grouting device is fixed to a reinforcement cage; s3, a reinforcement cage is arranged downwards, and a pipe opening of a mud jacking device is treated; s4, open-loop operation is carried out after concrete pouring is completed, and after concrete pouring is completed, clear water is pumped in through the grouting device within the set time, and the open-loop operation is completed; s5, first-stage grouting is carried out, after pile forming reaches the set time, cement paste is pumped through a grouting device, whether grouting is stopped or not is judged according to the termination standard, and if the standard is not met and the set amount of grout is pumped, a grouting hose needs to be washed with water; s6, second-stage grouting is carried out according to needs; and S7, grouting operation is terminated according to the standard, and grouting operation is stopped immediately when any standard is met according to the preset grouting termination standard. Grouting construction is faster and more efficient, and meanwhile the construction cost is saved.

The application relates to a construction method for preventing early shrinkage cracks, which comprises the following steps: old concrete surface treatment: cleaning the old concrete surface, removing loose particles and sundries, and ensuring the bonding between the new and old concretes; post-grouting system arrangement and installation: arranging a plurality of post-grouting systems on the old concrete at the joint between the new and old concretes, and fixing the post-grouting systems; new concrete pouring: after the post-grouting system arrangement is completed, the new concrete pouring work is carried out; retarder or cement paste mixed with a retarder component injection: injecting the prepared retarder or cement paste mixed with a retarder component through the post-grouting system; pouring form removal: segmentally removing two section forms of the pouring form; subsequent maintenance: after the pouring form is removed, the moisture maintenance is carried out within the preset maintenance time. The post-grouting system comprises a full-section grouting pipe and a half-section grouting pipe, and the half-section grouting pipe is arranged above the full-section grouting pipe and is arranged in a staggered mode with the full-section grouting pipe.

The application provides a cement-based composite material and a preparation method thereof, and belongs to the technical field of composite material preparation.The application comprises the following steps: step one, preparing heat-conducting and enhanced phase change energy storage microcapsules with uniform and controllable particle sizes; step two, preparing heat-conducting and enhanced phase change energy storage microcapsules with controllable wall thicknesses; and step three, preparing a phase change energy storage cement-based composite material test piece.The application prepares heat-conducting and enhanced phase change energy storage microcapsules with uniform and controllable particle sizes through a microfluidic chip, controls the wall thicknesses of the microcapsules through a layer-by-layer self-assembly method, and finally adds the heat-conducting and enhanced phase change energy storage microcapsules with controllable wall thicknesses into a cement paste, so that the microcapsules are dispersed in the cement paste, and a phase change energy storage cement-based composite material with good heat regulation capacity is prepared.

The invention discloses a method and system for characterizing fresh cement paste bleeding, and the method comprises the steps: firstly selecting a bleeding process of fresh cement paste as a research object, obtaining scatter test data of bleeding amount changing along with time, then building a time-dependent model for characterizing the bleeding process of the fresh cement paste, deducing an analytical solution, and combining the test data to obtain a time-dependent model for characterizing the bleeding process of the fresh cement paste. Various parameters of the time-dependent model are determined, the bleeding curve of the fresh cement paste is quantified, the change rule of the bleeding process is simulated, and practical engineering application is guided. According to the method for representing the bleeding of the fresh cement paste, a time-dependent self-weight consolidation model is adopted, an analytical solution is clear, calculation is easy and convenient, simulation precision is high, the method has a wide engineering application background, and an effective theoretical tool can be provided for representing the bleeding process of the cement paste.

The application relates to the technical field of building materials, and discloses a kind of negative carbon high-performance concrete and a preparation method thereof, adopt ferrochrome slag as aggregate, utilize slag powder, silica fume and waste stone powder to partially replace cement to prepare concrete, which not only reduces natural resource and energy consumption, reduces CO2 emission, but also promotes efficient utilization of industrial solid waste; in addition, the mechanical interlocking structure is formed between the spherical pores on the surface of ferrochrome slag and cement stone, which can improve the interface microstructure between aggregate and cement paste; at the same time, the olivine phase on the surface of the spherical pores dissolves and occurs carbonation reaction under high-temperature alkaline environment during high-temperature carbonization process, and needle-like magnesium carbonate crystals are generated in the spherical pores to fill the interface, thereby further optimizing the interface microstructure and improving the overall mechanical properties of the concrete.

The invention discloses a lightweight high-strength concrete thermal insulation wallboard for a high-rise building and a preparation method of the lightweight high-strength concrete thermal insulation wallboard. The lightweight high-strength concrete thermal insulation wallboard comprises the following raw materials in parts by weight: 300-500 parts of cement, 60-90 parts of slag powder, 60-100 parts of silica fume, 60-90 parts of microbeads, 100-200 parts of floating beads, 500-900 parts of modified lightweight aggregate, 15-20 parts of alkali-resistant glass fibers, 25-40 parts of a water reducing agent and 180-220 parts of water. According to the invention, a layer of'hard shell 'is formed on the surface after the shale ceramsite is wrapped and reinforced by the light cement paste, the problem of high water absorption rate of the shale ceramsite is improved, meanwhile, the mechanical property of the shale ceramsite is improved, secondly, the self-made lightweight aggregate is low in water absorption rate and high in strength, the density of the self-made lightweight aggregate is close to that of a gelling matrix of the thermal insulation wallboard, and the aggregate can be prevented from floating or sinking; the floating beads are added into the modified lightweight aggregate, so that the prepared lightweight wallboard is good in homogeneity, low in water absorption and good in mechanical property, the weight of the wallboard can be reduced through cooperation of the floating beads in the thermal insulation wallboard and the modified lightweight aggregate, meanwhile, the floating beads have excellent fire resistance and heat insulation performance, and the heat insulation and fire resistance of the lightweight wallboard can be improved through cooperation of the floating beads and the alkali-resistant glass fibers with the high melting temperature.

The invention discloses a stable high-water-content sludge roadbed filling construction device and method. According to the device, a movable frame serves as a carrier, a foam manufacturing and conveying device, a high-water-content sludge storage and conveying device and a cement mixing and conveying device are integrated, and foam, cement paste and sludge are supplied to a mixing tank of a vehicle-mounted stirring device through respective independent pipelines; the stirring device adopts a low-speed multi-blade impeller to carry out low-shear mixing so as to protect a foam structure, the mixture is uniformly sprayed on a roadbed by the spraying device, and then the mixture is leveled by the height-adjustable transverse slicking device. The method comprises the steps of device in-place, foam preparation, sludge and cement paste conveying, low-speed mixing, spraying, scraping and the like. Compared with the prior art, on-site integrated and continuous construction is achieved, the foam structure can be effectively protected, the material proportion and the construction rhythm can be accurately controlled, the construction efficiency, the engineering quality and the high-water-content sludge resource utilization rate are improved, and the energy-saving, environment-friendly and engineering popularization value is remarkable.

The application discloses a kind of waste plastics regeneration shotcrete and preparation method thereof, belong to waste plastic processing technical field.The raw material of waste plastics regeneration shotcrete of the application includes cement, coarse aggregate and fine aggregate, wherein, the fine aggregate part uses plastic granule, the plastic granule is hollow structure with intercommunicating aperture formed by plastic strip, and the aperture communicates the outside with its inside of granule.The structure of plastic granule is optimized in the application, intercommunicating aperture is formed in it, so as to facilitate cement paste to fill therein, so that the structural strength of concrete can be effectively improved, and the adhesion between plastic granule and cement paste is improved, the problem that the application of concrete is limited due to the lower strength of plastic and the poor adhesion between plastic and cement paste in the prior art is solved.

The utility model discloses a municipal pipe network soil improvement and reinforcement structure, which comprises a municipal road surface provided with a foundation pit for accommodating municipal pipelines; the cast-in-place piles are vertically and uniformly arranged on the bottom wall of the foundation pit; the base plate is horizontally arranged on the cast-in-place pile; and the fasteners are arranged on the cast-in-place piles on the outermost sides and used for being connected with the base plates. The municipal pipeline supporting structure has the advantages that the cast-in-place piles are arranged in the foundation pit, the soil position where the municipal pipeline is laid is reinforced, cement paste can permeate into the soil, the structural strength and stability of the soil are improved, the municipal pipeline is supported in cooperation with the base plate, and therefore geological factors are resisted, and the municipal pipeline is prevented from being damaged.

The invention provides a micro-crosslinking anti-gas-channeling agent as well as a preparation method and application thereof. The micro-crosslinking anti-gas-channeling agent is prepared from the following raw materials: polybutadiene, styrene, a modified monomer and a crosslinking agent, the modified monomers comprise sulfonic acid group-containing unsaturated monomers and salts thereof, and carboxyl group-containing unsaturated monomers and salts thereof; based on 100% of the total molar weight of the polybutadiene, the styrene and the modified monomer, the molar percentage content of the modified monomer is 22-42%. The micro-crosslinking anti-gas-channeling agent has an excellent anti-gas-channeling effect, is resistant to high temperature and salt, and can obviously improve the anti-gas-channeling effect of cement paste under the condition of a small addition amount, so that the cement paste comprising the micro-crosslinking anti-gas-channeling agent is good in anti-gas-channeling effect, wide in applicable temperature range, and suitable for various types of well cementation; and for well cementation of a high-risk gas well with serious gas channeling potential, a good gas channeling prevention effect is also achieved.