72 results about "Plastic viscosity" patented technology

The invention relates to the field of artificial intelligence, and discloses a drilling fluid performance analysis and early warning method fusing a knowledge base and mode mining, which comprises the following steps: acquiring time sequence historical data such as drilling fluid density, funnel viscosity, plastic viscosity and sand content, and constructing a knowledge base module based on the acquired data; and mining a strong association rule of drilling fluid performance change by using a sequence pattern mining module of prefix projection. And finally, decomposing the data into a trend item, a periodic item and a random item through a time sequence decomposition technology, constructing an analysis and early warning module in combination with a long-short-term memory network, and sending out an early warning signal in time when monitoring that the performance parameters deviate from a normal mode or predicting that the performance is about to be abnormal. According to the method, a new effective method is provided for drilling fluid performance analysis and pollution early warning, the knowledge base and pattern mining are fused, the time sequence decomposition technology and time sequence long-term prediction are utilized, and the problems of overfitting phenomenon and abnormal value and noise tolerance are well solved.

The invention discloses a viscosity-reducing fast-dispersing polycarboxylate superplasticizer for high-strength concrete and a preparation method thereof, and relates to the technical field of polycarboxylate superplasticizers. The viscosity-reducing fast-dispersing polycarboxylic acid water reducer for the high-strength concrete comprises the following components in parts by weight: 400 parts of unsaturated polyether macromonomer, 20-40 parts of unsaturated acid monomer and 10-20 parts of unsaturated functional monomer. The invention also provides a preparation method of the polycarboxylate superplasticizer. The water reducer can reduce the viscosity of high-strength concrete, improve the dispersing performance of the concrete and shorten the mixing time, so that the problems of high plastic viscosity and the like of the concrete are solved under the condition of not reducing other performances such as the strength of the concrete.

The invention relates to the field of oil field drilling, and discloses a method, a system, a medium and equipment suitable for judging a rheological mode of drilling fluid in a polar region, and the method comprises the following steps: drawing a shearing stress-shearing rate rheological curve of the drilling fluid under various temperature conditions according to rheological property experimental measurement data; calculating the plastic viscosity, the dynamic shear force, the flow index and the consistency coefficient of the drilling fluid; fitting the rheological curve of the drilling fluid under each temperature measurement condition based on the plastic viscosity, the dynamic shear force, the flow index, the consistency coefficient and the constitutive equation of the four rheological modes; wherein the four rheological modes comprise a Bingham mode, a power law mode, a Casson mode and a Heschel-Balcoril mode; drawing a fitting curve according to a fitting result, and solving mean square errors and judgment coefficients of the four rheological modes under each temperature condition; and judging the applicability of the four rheological modes to the polar drilling fluid measured under different temperature conditions through the judgment coefficients so as to determine the rheological mode with the best applicability.

The invention provides a self-compacting concrete pumping resistance calculation method, which belongs to the field of pumping and comprises the following steps: S1, establishing an initial pumping parameter model according to pipeline geometric parameters of a pumping pipeline, initial physical characteristics of self-compacting concrete and pumping process parameters; s2, pumping working condition data are collected in real time and subjected to digital filtering processing, and the filtered concrete flow velocity is obtained; s3, calculating the dynamic plastic viscosity of the self-compacting concrete under the current working condition by utilizing a dynamic rheological evolution model according to the pumping time, the pumping environment temperature and the relative humidity; and S4, according to the initial pumping parameter model, the dynamic plastic viscosity and the filtered concrete flow velocity, pressure losses of different sections of the pumping pipeline are calculated, and the total pumping resistance is obtained based on the pressure losses of all the sections. According to the method, the calculation accuracy of the total pumping resistance of the pumping pipeline is improved through the concrete dynamic rheological characteristics, the environment temperature and humidity effect, the pipeline geometric parameters and the pumping process parameters.

The invention discloses a graft polymer and a preparation method and application thereof.The graft polymer comprises a structural unit I from graphene oxide, a structural unit II from a monomer A and a structural unit III from a monomer B. The value of the carbon element and the oxygen element of the graphene oxide is not larger than 2.5; the monomer A is a monomer containing a sulfonic acid group; the monomer B is a propenyl monomer containing a rigid group; the viscosity average molecular weight of the graft polymer is 75,000 to 120,000. The graft polymer disclosed by the invention can be used as an ultrahigh-temperature salt-resistant shear strength improving agent for water-based drilling fluid, the temperature resistance can reach 240 DEG C or above, the salt resistance can reach saturation, and the influence on the plastic viscosity of the drilling fluid is less while the shearing force of the drilling fluid is increased.

The invention discloses an ultra-fine powder-small molecule alcohol biphase synergistic UHPC viscosity reducer and a preparation method thereof, and belongs to the technical field of building material admixtures. Ultra-fine powder is adopted for preparing a viscosity reduction admixture, dense accumulation is achieved through multi-scale particle filling, friction force among particles is reduced, a particle system with continuous grading is formed, and therefore the viscosity reduction admixture is prepared. The free water requirement is reduced, and the slurry flowability is remarkably improved; meanwhile, through the dispersion effect of the polycarboxylic acid high-performance water reducing agent, lubrication and hydration regulation and control of the small molecular alcohol, the air entraining agent and the defoaming agent synergistically optimize a bubble system, and the retarder delays the hydration process, a multi-scale synergistic viscosity reduction mechanism is formed, the yield stress and the plastic viscosity of the slurry are remarkably reduced, and meanwhile, high strength and durability are kept; the method is suitable for efficient viscosity reduction and working performance optimization of a UHPC system with a low water-binder ratio.

The invention discloses high-compactness low-resilience shotcrete and a preparation method thereof, and relates to the field of shotcrete, the preparation method comprises the following steps: (1) respectively stacking a cementing material, a fine aggregate and a coarse aggregate by adopting an MAA model to obtain a design ratio of each internal raw material; and (2) fully mixing the cementing material, the fine aggregate, the coarse aggregate and the elasticity reducing agent which are obtained according to the design ratio in the step (1), adding water and a water reducing agent for mixing, and doping an accelerator in a manner of mixing with pressurized air to obtain the high-compactness low-resilience sprayed concrete. The early-strength elasticity reducing agent is adopted, pumpability of the sprayed concrete is improved, early hydration of the concrete is accelerated, under the combined action of the early-strength elasticity reducing agent and the alkali-free accelerator, the early mechanical property of the sprayed concrete is rapidly improved, and the construction efficiency of the sprayed concrete is improved. And by adopting multi-section close packing, close filling structures are respectively formed in the cementing material, the fine aggregate and the coarse aggregate, so that the plastic viscosity of the slurry and the compactness of the concrete are effectively improved.

Drilling fluid compositions may include a weighting agent, a nitrite-containing compound, and an ammonium-containing compound, where the nitrite-containing compound and the ammonium-containing compound may be encapsulated together in copolymer micro-particles forming encapsulated thermochemical compounds, and where at least one property selected from the group consisting of the density, the plastic viscosity, the yield point, the gel strength, and the pH, of the drilling fluid composition may be substantially similar to the at least one property of a comparable drilling fluid composition devoid of the encapsulated thermochemical compounds. Methods for reducing a filter cake from a wellbore surface in a subterranean formation are also provided. The methods may include introducing into the wellbore the drilling fluid compositions, allowing the drilling fluid composition to reach a temperature in the wellbore sufficient for the encapsulated thermochemical compounds to react, where the reaction of the encapsulated thermochemical compounds generates heat and nitrogen gas.

A composition of an invert emulsion oil-based drilling fluid formulation includes an invert emulsion of an oil phase and an aqueous phase. The oil phase includes an oleaginous fluid and a liquid viscosifier that is a polyhedral oligomeric silsesquioxane (POSS). A method includes introducing an invert emulsion oil-based drilling fluid formulation including an oil phase, an aqueous phase, and a liquid viscosifier including POSS downhole through the wellbore and maintaining wellbore conditions such that the invert emulsion oil-based drilling fluid formulation provides a stable rheological property including one or more of viscosity, yield point, plastic viscosity, gel strength, and electrical stability for a period up to about 96 hours.

The present invention proposes a method for calculating the pumping resistance of self-compacting concrete, which belongs to the field of pumping. The method comprises: S1: establishing an initial pumping parameter model based on the geometric parameters of the pumping pipeline, the initial physical properties of the self-compacting concrete, and the pumping process parameters; S2: real-time acquisition of pumping condition data and digital filtering to obtain the filtered concrete flow rate; S3: calculating the dynamic plastic viscosity of the self-compacting concrete under the current working conditions using a dynamic rheological evolution model based on the pumping time, pumping ambient temperature, and relative humidity; S4: calculating the pressure loss in different sections of the pumping pipeline based on the initial pumping parameter model, the dynamic plastic viscosity, and the filtered concrete flow rate, and obtaining the total pumping resistance based on the pressure loss in each section. The present invention improves the accuracy of calculating the total pumping resistance of the pumping pipeline by taking into account the dynamic rheological properties of concrete, the effects of ambient temperature and humidity, the geometric parameters of the pipeline, and the pumping process parameters.

Drilling fluid compositions may include a weighting agent, a nitrite-containing compound, and an ammonium-containing compound, where the nitrite-containing compound and the ammonium-containing compound may be encapsulated together in copolymer micro-particles forming encapsulated thermochemical compounds, and where at least one property selected from the group consisting of the density, the plastic viscosity, the yield point, the gel strength, and the pH, of the drilling fluid composition may be substantially similar to the at least one property of a comparable drilling fluid composition devoid of the encapsulated thermochemical compounds. Methods for reducing a filter cake from a wellbore surface in a subterranean formation are also provided. The methods may include introducing into the wellbore the drilling fluid compositions, allowing the drilling fluid composition to reach a temperature in the wellbore sufficient for the encapsulated thermochemical compounds to react, where the reaction of the encapsulated thermochemical compounds generates heat and nitrogen gas.

The invention discloses a multi-element solid-waste-based ecological mining area filling material and a preparation method thereof.The preparation method of the multi-element solid-waste-based ecological mining area filling material comprises the steps that a first system and a second system are mixed to be uniform, slurry is obtained, pouring and standing are conducted till final setting, maintenance is conducted, and the multi-element solid-waste-based ecological mining area filling material is obtained; the first system comprises a foaming agent and first water; the second system comprises a cementing material, second water and a water reducing agent. The multi-element solid waste-based ecological mining area filling material provided by the invention takes the fly ash as a main raw material and is low in cost, the slump expansion degree of the multi-element solid waste-based ecological mining area filling material is up to 272 mm, the uniaxial compressive strength is up to 5.928 MPa, and meanwhile, the multi-element solid waste-based ecological mining area filling material has relatively low plastic viscosity and yield stress.

Drilling fluid compositions may include a weighting agent, a nitrite-containing compound, and an ammonium-containing compound, where the nitrite-containing compound and the ammonium-containing compound may be encapsulated together in copolymer micro-particles forming encapsulated thermochemical compounds, and where at least one property selected from the group consisting of the density, the plastic viscosity, the yield point, the gel strength, and the pH, of the drilling fluid composition may be substantially similar to the at least one property of a comparable drilling fluid composition devoid of the encapsulated thermochemical compounds. Methods for reducing a filter cake from a wellbore surface in a subterranean formation are also provided. The methods may include introducing into the wellbore the drilling fluid compositions, allowing the drilling fluid composition to reach a temperature in the wellbore sufficient for the encapsulated thermochemical compounds to react, where the reaction of the encapsulated thermochemical compounds generates heat and nitrogen gas.

The invention discloses a superfine composite mineral admixture for tunnel engineering wet spraying concrete. The superfine composite mineral admixture comprises the following components in percentage by weight: 30-60 parts of dense silica fume; 40 to 70 parts of superfine slag powder; the weight of the dispersing agent is 0.03%-0.07% of the total weight of the dense silica fume and the superfine slag powder. According to the invention, industrial solid wastes such as silica fume, superfine slag powder and the like are used as raw materials, and the superfine composite mineral admixture for the wet-sprayed concrete with good dispersity is provided, so that cementing material particles tend to be closely stacked, contact points among powder particles are increased, the plastic viscosity and yield stress of fresh concrete are effectively increased, and the quality of the concrete is improved. The cohesiveness and the water-retaining property of fresh concrete are enhanced, and the rebound rate of wet-sprayed concrete is reduced.

The invention relates to the field of drilling fluids, in particular to a shear-improving non-plasticization shear-improving agent for an oil-based drilling fluid, a preparation method of the shear-improving non-plasticization shear-improving agent and the oil-based drilling fluid. The shear-improving non-plasticizing viscous shear-improving agent for the oil-based drilling fluid provided by the invention is prepared by reacting amine and derivatives thereof, polyacid, alcohol ether compounds and unsaturated higher fatty acid ester according to a certain proportion and then diluting and dissolving with a solvent. The shear strength improving agent provided by the invention has the characteristics of good shear strength improving effect and no plasticizing viscosity, improves the rock carrying capacity of the oil-based drilling fluid, does not improve the plastic viscosity of the oil-based drilling fluid, improves the flow pattern of the oil-based drilling fluid, and effectively realizes the low-viscosity high-shear oil-based drilling fluid.

The invention discloses a concrete steel fiber gradient orientation method. The method comprises the following steps: (1) measuring the length-diameter ratio and magnetic conductivity of steel fibers and the plastic viscosity and density of cement paste; (2) adjusting the magnetic field intensity to 100mT, changing the direction of the magnetic field, and carrying out first single-direction orientation on the steel fiber reinforced concrete; (3) setting an orientation angle according to orientation requirements and calculating required magnetic field intensity, so that gradient orientation of the steel fibers is realized; (4) detecting the orientation result of the fiber; and (5) judging whether the steel fiber is oriented to a target angle, and if not, repeating the steps (3)-(4) until the steel fiber is oriented to the target angle. The method is simple in theory, gradient orientation of the steel fibers is achieved by applying proper magnetic field intensity, the situation that the steel fibers are distributed in the single direction is avoided, the steel fibers in the concrete are distributed in the specific direction through the method, the utilization rate of the steel fibers is increased to the maximum extent, and the tensile property of a concrete structure is improved.

The invention relates to a water activity regulator as well as a preparation method and application thereof. The preparation method of the water activity regulator comprises the following steps: (1) mixing 2-acrylamide-2-methylpropanesulfonic acid, sodium p-styrenesulfonate, N-vinylpyrrolidone and polyether amine, and adding an initiator for polymerization reaction to obtain a polyether amine-sulfonic acid group-benzene ring copolymer; and (2) mixing the polyether amine-sulfonic acid group-benzene ring copolymer with a hydroxyl compound to obtain the water activity regulator. By adding the water activity regulator disclosed by the invention, the retention rate of apparent viscosity and plastic viscosity of the prepared sample adding slurry after aging is high, and the API filter loss is low.

This invention discloses a computer vision-based method and system for detecting the workability of concrete. It employs a non-contact visual sensing approach to simultaneously acquire video sequences of freshly mixed concrete in a free-flowing state at both the macroscopic slump flow scale and the microscopic particle migration scale. An improved spatiotemporal feature pyramid network is used to extract multi-scale morphological features from the video sequences, obtaining a multi-scale visual feature set including the flow profile evolution rate, surface ripple spectrum, aggregate suspension trajectory, and paste coating state. A graph neural network model integrating prior knowledge of fluid mechanics is constructed to map discrete visual features to continuous rheological parameters, outputting workability indicators such as slump, spread, yield stress, and plastic viscosity in real time. This invention significantly improves the level of intelligent quality control in concrete production.

The invention discloses a preparation method of C2-grade ceramic tile adhesive mortar capable of improving hanging resistance and construction hand feeling, and relates to the field of building material chemistry and composite materials. The preparation method of the C2-grade ceramic tile adhesive mortar for improving the sagging resistance and the construction hand feeling comprises a dry mixing pre-dispersion stage, a staged wet mixing and homogenizing stage, a standing curing stage and a final activation stage. According to the preparation method of the C2-grade ceramic tile adhesive mortar capable of improving the sagging resistance and the construction hand feeling, through the core effect of a wood fiber composite system, the traditional problem that high sagging resistance must be accompanied by high construction resistance is solved, the sagging resistance is maintained and even enhanced, meanwhile, the yield stress and the plastic viscosity of freshly mixed mortar are remarkably reduced, and the quality of the ceramic tile adhesive mortar is improved. The construction blade coating is smooth and labor-saving, the slurry is easy to spread, the surface is flat and full, and the construction efficiency, quality and operation experience are greatly improved.

A hematite-based fly ash composition includes a curable component including a fly ash binder material (FFA) and a hematite weighting agent present in an amount of 20 to 80% by weight of the fly ash binder material (BWOB). The composition further includes superplasticizers (SPs) in an amount of 5 to 10% BWOB; retarders in an amount of 5 to 10% BWOB; a defoamer in an amount of 0.01 to 0.02% BWOB; and an aqueous alkaline solution in an amount of 50 to 60% BWOB. The hematite-based fly ash composition has a thickening time of from 80 to 580 minutes at 195° F. and a plastic viscosity of 150 to 350 cP.

The invention discloses a corrosion test method for a seabed cement-based material. The corrosion test method comprises the following steps: step 1, preparing artificial seabed sludge; 2, testing the water content and the shear strength of the artificial seabed sludge; 3, drawing a shear stress-shear rate curve of the artificial seabed sludge, and determining the yield stress and the plastic viscosity of the artificial seabed sludge; step 4, completely burying cement-based materials with different proportions into artificial seabed sludge, covering a sealing device, putting the artificial seabed sludge into a constant temperature and humidity chamber or an environmental test chamber, setting temperature and humidity parameters, and starting a soaking test; and 5, taking out the cement-based material according to a preset time interval, observing and testing to obtain an erosion rule of the cement-based material in an artificially prepared seabed sludge environment, and determining a construction mix proportion. The concentration of key erosion factors is accurately controlled by adjusting components according to needs, and erosion characteristics of specific marine environments such as mud flat, deep sea and salt marsh can be simulated.

The application discloses a kind of high density low rebound shotcrete and preparation method thereof, it is related to shotcrete field, and preparation method includes: (1), respectively to cementitious material, fine aggregate, coarse aggregate is using MAA model to be packed and the design ratio of each raw material in interior is obtained;(2), cementitious material, fine aggregate, coarse aggregate and the rebounding agent of design ratio obtained according to step (1) are fully mixed, water, water reducing agent is mixed, then by the way of mixing with pressurized air, incorporate accelerator, obtain high density low rebound shotcrete.The application uses early strength rebounding agent, improves the pumpability of shotcrete, accelerates the early hydration of concrete, under the joint action of alkali-free accelerator, rapidly improves the early mechanical properties of shotcrete, improves shotcrete construction efficiency.Multiple close packing is used, and cementitious material, fine aggregate, coarse aggregate respectively form close packing structure, effectively improve the plastic viscosity of paste and the compactness of concrete.

The present application relates to the field of environmental protection and ecological restoration, in particular to a method and system for determining the cylindrical penetration radius of a Bingham cement slurry diffusion path, comprising the following steps: obtaining the density, mass water content, specific gravity, permeability coefficient and average particle size of the rock-soil body through a rock-soil body mechanics experiment, and obtaining the porosity of the rock-soil body; obtaining the length ratio of the pore channels in the rock-soil body based on the porosity of the rock-soil body and the above-mentioned parameter information; obtaining the water viscosity, Bingham fluid plastic viscosity and Bingham fluid yield stress based on a rheological test scheme, and obtaining the water-cement ratio of the Bingham cement slurry, the grouting time, the grouting pressure, the grouting pipe radius and the groundwater pressure at the grouting point according to the grouting requirements; and obtaining the cylindrical penetration radius result under the Bingham cement slurry diffusion path based on the comprehensive action information of the particle size distribution, the diffusion path influence and the parameter information. The present application can calculate and predict the cylindrical penetration radius, reduce the risk of grouting engineering and ensure the safety and stability of the engineering.

The invention provides high-frequency foundation pier self-compacting concrete as well as a preparation method and application thereof. The concrete comprises a cementing material system, an aggregate system, a functional additive, a fiber reinforced system and a self-repairing component. Wherein the steel fibers are mixed with the sisal fibers subjected to plasma grafting treatment, so that the crack resistance is improved; the diatomite microcapsule loaded with bacillus is used as a self-repairing component to realize the self-healing of the crack. During preparation, the self-compactness and compactness of a concrete mixture are ensured through a step-by-step stirring and high-frequency vibration process. Through fiber modification treatment, a microcapsule self-repairing technology and process optimization, the concrete has low yield stress and high plastic viscosity, the crack resistance and durability in a high-frequency vibration environment are remarkably improved, the crack healing rate can reach 50%, and the concrete is suitable for high-frequency foundation pier construction of bridges, wind power, nuclear power and the like and has good engineering application value.

The invention provides a fatty acid amide shear strength improving agent for Antarctic well drilling as well as a preparation method and application of the fatty acid amide shear strength improving agent. The fatty acid amide shear strength improving agent for Antarctic well drilling is prepared from palmitic acid, triethanolamine and a polyamine compound through a dehydration polycondensation reaction in the presence of a catalyst, the polyamine compound is one of hydroxyethyl ethylenediamine, 5-(N-ethyl-N-2-hydroxyethyl amine)-2-pentylamine, and N, N '-bis (hydroxyethyl) ethylenediamine; the catalyst is one of concentrated sulfuric acid or p-toluenesulfonic acid. The shear strength improving agent is excellent in shear strength improving performance, good in suspension performance and controllable in plastic viscosity, the ultralow-temperature rheological property of drilling fluid can be effectively improved, carrying and suspension of rock debris and ice debris by the drilling fluid in the Antarctic drilling process are improved, and then safe and efficient drilling is guaranteed.

The invention relates to the field of auxiliaries, in particular to a polyester plastic viscosity reducer and a preparation method thereof, and the polyester plastic viscosity reducer comprises the following raw materials in parts by weight: 3-10 parts of a nucleating monomer, 90-97 parts of a branching monomer, 0.1-0.3 part of a catalyst A, 10-30 parts of a chain extension monomer and 0.3-0.5 part of a catalyst B. The additive can greatly reduce the melt viscosity of the polyester plastic, improves the flowability and processability of the polyester plastic, and can make the polyester plastic maintain good mechanical properties. The process reaction is easy to control, industrial and large-scale production is facilitated, and the method is an efficient preparation process and method.

A method may include: receiving wellbore data comprising wellbore geometry, density and rheology of a drilling fluid, and density and rheology of a cement slurry, and receiving a design objective function; generating a plurality of spacer fluid train designs where each of the plurality of spacer fluid train designs comprise two or more spacer fluids where each spacer fluid has a specified density, yield point, plastic viscosity, and volume; calculating a solution to an objective function and annular displacement for each of the plurality of spacer fluid train designs in a reverse cementing operation using a displacement simulator having inputs comprising the wellbore data and the plurality of spacer fluid train designs; comparing each solution to the objective function to the design objective function; selecting a spacer fluid train design from the plurality of spacer fluid train designs which meets the design objective function; and preparing a spacer fluid train based on the selected spacer fluid train design.

The present application relates to the technical field of high-performance cement-based material preparation and process control, and particularly relates to a self-compacting ultra-high performance concrete performance optimization method based on rheological parameter regulation. The steps are as follows: steel fibers are added to self-compacting ultra-high performance concrete slurry with rheological parameters in a set range to prepare test pieces, X-ray CT technology is used to perform three-dimensional reconstruction on the test pieces after curing, steel fiber distribution parameters are extracted, and crack propagation morphology and strain field distribution data are collected; an interface homogeneity index related to the steel fiber distribution parameters, crack propagation morphology and strain field distribution data is constructed, and X-ray CT technology is used to perform interface densification analysis; a function mapping relationship between the rheological parameters and the interface microstructure is constructed to determine the value range of the optimal yield stress and plastic viscosity. The above method is used to realize performance optimization in the self-compacting ultra-high performance concrete preparation stage.

The application discloses a high-strength-concrete viscosity-reducing fast-dispersing polycarboxylic acid water reducing agent and a preparation method thereof, and relates to the technical field of polycarboxylic acid water reducing agents; the high-strength-concrete viscosity-reducing fast-dispersing polycarboxylic acid water reducing agent comprises the following components in parts by weight: 400 parts of unsaturated polyether macromonomer, 20-40 parts of unsaturated acid monomer and 10-20 parts of unsaturated functional monomer; and the application further provides a preparation method of the polycarboxylic acid water reducing agent. The water reducing agent can reduce the viscosity of high-strength concrete, improve the dispersing performance of the concrete, reduce the mixing time, and thus solve the problems of high plastic viscosity of the concrete and the like without reducing the strength and other performances of the concrete.

The invention discloses a concrete fluidity presumption method, a computer program product and a storage medium, and the method comprises the steps: building a concrete fluidity presumption model, taking the plastic viscosity data and dynamic yield stress data of concrete as the input variables of an artificial neural network; slump data and expansion data of the concrete serve as output variables of the artificial neural network; acquiring plastic viscosity data, dynamic yield stress data, slump data and expansion data corresponding to a plurality of parts of fresh concrete, constructing a data set, dividing the data set into a training set, a verification set and a test set, and learning the concrete fluidity presumption model; plastic viscosity data and dynamic yield stress data of to-be-detected fresh concrete are imported into the model, corresponding slump data and expansion data are presumed through the concrete fluidity presumption model, and the fluidity of the to-be-detected fresh concrete is judged through the obtained slump data and expansion data.