2284 results about "Cement mortar" patented technology

The invention belongs to the technical field of building materials, and discloses a high-activity composite auxiliary cementing material based on carbonated steel slag-carbide slag as well as a preparation method and application of the high-activity composite auxiliary cementing material. The high-activity composite auxiliary cementing material is prepared from the following raw materials in parts by mass: 40 to 55 parts of carbonated steel slag-carbide slag composite micro powder, 30 to 40 parts of high titanium slag, 20 to 25 parts of metakaolin, 3 to 5 parts of ardealite, 3 to 5 parts of calcium carbonate, 3 to 5 parts of calcium carbonate and 3 to 5 parts of calcium carbonate. Wherein the carbonated steel slag-carbide slag composite micro powder is obtained by carrying out carbon sequestration reaction on steel slag and carbide slag in a solution consisting of a carbonization enhancer, an additive and water. On one hand, the CO2 storage amount of the steel slag and the carbide slag is increased, the stability and the activity are improved, on the other hand, the carbonized steel slag-carbide slag and other industrial solid waste are cooperated to achieve a composite superimposed effect, the cement mortar or the concrete can be improved in strength, stability and durability, the comprehensive performance is good, and the cost is low. And the method is green, low-carbon, energy-saving, environment-friendly and wide in popularization and application

The invention discloses low-carbon high-freezing-resistance magnesium phosphate cement mortar and a preparation method and application thereof, and belongs to the technical field of constructional engineering materials, the mortar comprises low-carbon magnesium phosphate cement, river sand, hydrolyzed silanol and mixing water; the hydrolyzed silanol is a product obtained by hydrolyzing a silane coupling agent in ethanol and water under an acidic condition; the invention relates to a high-strength concrete, which is prepared from the following formula components in parts by mass: 145 to 250 parts of low-carbon magnesium phosphate cement, 145 to 250 parts of river sand, 7 to 35 parts of silane coupling agent, 42 to 210 parts of ethanol, 21 to 105 parts of water and 10 to 30 parts of water for mixing. The cement has the advantages of adjustable setting time, low carbon, energy conservation, good mechanical properties, strong water resistance and freezing resistance and the like.

The invention belongs to the technical field of road construction, and particularly relates to a copper-doped tailing pavement base material as well as a proportion confirmation method and application thereof. The preparation method comprises the following steps: S1, preparing raw materials; s2, a compaction test method is adopted, and the void ratio of the compacted aggregate wrapped with the cement mortar is calculated; s3, according to the volume filling principle, the gravels form a basic framework, the void ratio of the gravels in the compaction state is measured, cement adhesive cement adheres to aggregate, the aggregate is filled in gaps of the framework formed by the gravels, and finally the blending proportion of the copper tailings, the gravels and the aggregate is determined by combining the composition mechanism and volume parameters of the mixture; and S4, calculating the using amount of the steel slag composite cementing material mucilage according to the thickness of the steel slag composite cementing material mucilage wrapping film and the specific surface area of the copper tailings. A skeleton filling theoretical method is adopted, the shrinkage effect of the filler in the skeleton is controlled, the cracking risk is reduced, and meanwhile the high strength is achieved.

The invention relates to a prefabricated wall type damper plugging structure and a construction method thereof, the plugging structure comprises two steel frameworks on the back side and the front side of a metal damper, and a ceiling keel is fixed at the lower end of an upper cantilever wall; the vertical keels are divided into a left keel bundle and a right keel bundle, and metal dampers are arranged in the interval between the two sets of vertical keels. The ground keel is used for connecting the lower ends of the vertical keels of the left keel bundle and the right keel bundle; a reserved interval is arranged at the upper ends of the ground keel and the lower cantilever wall and filled with cement mortar. The construction method comprises the steps that firstly, a steel framework is manufactured, cement mortar is smeared at the top end of a lower cantilever wall according to the reserved interval height, then the steel framework is installed between an upper cantilever and a lower cantilever, the upper end of the steel framework is fixedly connected with an upper cantilever wall, and the lower end of the steel framework falls on the top face of the cement mortar; transverse keels are mounted on the steel framework on the back side of the metal damper to reinforce the frame body, and an access door area is reserved on the steel framework on the front side; rock wool is filled in the space of the steel skeleton, panel and surface layer construction is carried out, and finally an access door is installed.

The invention discloses material conveying equipment for construction, and relates to the technical field of material conveying, the material conveying equipment comprises a supporting frame, a conveying belt is fixedly connected to the top of the supporting frame, a conveying mechanism is arranged at the top of the conveying belt, and through the arrangement of the conveying mechanism, when materials are placed on the conveying belt, the materials are lapped on an opening and closing supporting plate; the opening and closing supporting plate is in an upwarp state, so that the materials are supported, the materials can be supported through the opening and closing supporting plate when being conveyed on the inclined conveying belt, the problem that the materials slide down obliquely from the inclined conveying belt along with gravity is avoided, and the stability of conveying the materials from bottom to top is guaranteed; and the surface of the cement mortar bag can be automatically cleaned under the swinging action of the opening and closing supporting plate, the problem that the cement mortar bag falls off from the conveying belt due to unstable placement when the cement mortar bag is subsequently placed is avoided, and then the stability of transportation work is guaranteed.

The invention discloses a composite gel-physical foaming synergetic carbon dioxide foam concrete preparation technology, and the carbon dioxide foam concrete is composed of the following components in parts by mass: 15-45 parts of sulphoaluminate cement, 10-50 parts of semi-hydrated gypsum, 5-15 parts of Portland cement, 0-30 parts of mineral powder, 0-0.3 part of a gypsum retarder, 0.2-0.4 part of a retarder, and 0.2-0.4 part of a water reducing agent. The invention relates to a cement mortar which is prepared from the following components in parts by weight: 0.2-0.6 part of calcium stearate, 0.1-0.3 part of hydroxypropyl methyl cellulose ether (HPMC), 0.2-0.45 part of water cement and 5-15 parts of prefabricated foam. When the sulphoaluminate cement, the Portland cement and the semi-hydrated gypsum are mixed according to a specific mass ratio to prepare the carbon dioxide foam concrete, the hydration synergistic effect among the sulphoaluminate cement, the Portland cement and the semi-hydrated gypsum can be exerted, so that the mechanical property of the carbon dioxide foam concrete can be greatly improved.

The invention relates to the technical field of cement mortar compositions, and particularly discloses a double-component anti-freezing early-strength slurry and a preparation method and application thereof. The double-component anti-freezing early-strength slurry provided by the invention is composed of a component A and a component B in a weight ratio of 25: (4-10), the component A is prepared from the following components in parts by weight: 250 to 280 parts of Portland cement, 90 to 100 parts of admixture, 145 to 165 parts of sand and 6.4 to 8.4 parts of water reducing agent; and the component B comprises the following components in parts by weight: 8-10 parts of a sodium nitrite antifreeze agent, 50-58 parts of a reinforcing aid, 32-40 parts of anhydrite, 240-270 parts of an admixture, 155-175 parts of sand and 4.1-6.1 parts of a water reducing agent. By utilizing the technical scheme, the prepared double-component anti-freezing early-strength slurry has the advantages of rapid development of early compressive strength and stable growth of later compressive strength under different ultralow temperature conditions.

The invention discloses quick-hardening cement mortar and an application method thereof, and relates to the technical field of building materials, the quick-hardening cement mortar is composed of the following components: quick-hardening sulphoaluminate cement, common Portland cement, aggregate, an additive and a fiber composition; the fiber composition comprises galvanized steel fibers and polymer fibers, and the polymer fibers comprise PVA fibers; a film layer modified by a silane coupling agent is formed on the surfaces of the galvanized steel fiber and the polymer fiber, and the silane coupling agent is selected from at least one of aminopropyltriethoxysilane and diamino type functional group silane. The galvanized steel fibers and the polymer fibers are adopted in the cement mortar, the polymer fibers generate pressure stress in a cement block by utilizing an environment that the cement is severely hydrated in a short time, and the polymer fibers and the galvanized steel fibers generate a synergistic effect, so that the overall anti-dry-crack effect of the cement block is achieved; through a silane coupling agent surface modification scheme, the anti-cracking effect is enhanced, and the effect of common long fibers is achieved through short fibers.

The invention discloses a method for preparing high-performance cement mortar based on NaOH activated coal gangue, which comprises the following steps: putting preliminarily crushed coal gangue into a rod mill for crushing and screening to obtain undersize coal gangue and oversize coal gangue; calcining the treated coal gangue, and putting the calcined product into a rod mill for fine grinding to obtain an admixture; weighing the admixture and the cement in proportion, and uniformly stirring and mixing to obtain a cementing material; the preparation method comprises the following steps: pouring a cementing material and gravel into a stirrer according to a mortar ratio, uniformly stirring, dissolving an exciting agent NaOH and a water reducing agent into water, pouring into the stirrer, and uniformly stirring the mixed materials to obtain the final high-performance cement mortar. The coal gangue is calcined and ground by a rod mill to serve as the admixture to replace part of the Portland fly ash cement, and the exciting agent NaOH is added, so that the bending strength and the compressive strength of a test piece added with the exciting agent NaOH are increased, and the admixture is effectively excited and activated by the NaOH.

The invention belongs to the technical field of building waterproof material detection, and particularly relates to a polymer cement waterproof coating performance detection system which is characterized in that a to-be-detected polymer cement waterproof coating is coated on the surface of a cement mortar base material to form a coating layer, and after standard curing, the circumferential edge of the base material is sealed to limit a detection area; increasing the water pressure of the detection area in stages, synchronously acquiring surface strain data and water content data in the base material, dynamically constructing a permeation path map in the base material in a water pressure loading process, calibrating a permeation path starting point and analyzing permeation behavior parameters, counting the distribution proportion of a permeation path starting point in the center and the edge to judge a potential sealing interference risk, verifying edge permeation abnormality in combination with strain data when the potential sealing interference risk exists, rejecting non-coating performance related parameters, integrating and correcting a permeation behavior parameter set, and outputting an evaluation result after matching according to an anti-permeability grade standard. And comprehensive and accurate dynamic analysis of the penetration behavior is realized on the basis of eliminating the edge sealing interference influence.

The utility model relates to the technical field of cement mortar, in particular to a cement mortar vibration test bed for cement detection, which comprises a base, a vibration table is arranged in the base, a mold is arranged on the upper end face of the vibration table, a plurality of uniformly distributed containing grooves are arranged in the mold, and a first servo motor, a first screw rod and a second sliding rod are matched to form a vibration test bed. A second servo motor, a second lead screw and a second sliding rod can drive the stirring barrel and the material conveying barrel to move front and back, a second driving motor drives a spiral blade to rotate, cement mortar can be discharged from the material conveying barrel, and the stirring barrel and the material conveying barrel move front, back, left and right; the cement mortar can be sequentially filled into a plurality of containing grooves in the mold, the electric push rod drives the first movable frame to move up and down, the trowelling plate can be driven to make contact with the cement mortar, the trowelling plate moves left and right, the cement mortar can be automatically troweled, and the problem that manual feeding and trowelling are needed in the prior art is solved.

The utility model relates to a lighting, heat-insulating and waterproof window well of a building and belongs to the technical field of window wells. Comprising a basement wall and a lighting assembly, window wells are arranged on the basement wall, the lighting assembly comprises lighting windows and suspended ceilings, the lighting windows and the suspended ceilings are located at the tops and the bottoms of the window wells respectively, the window wells comprise the upper window wells and the lower window wells, and the lower window wells are in a horn shape; a waterproof heat preservation assembly is arranged between the window well and the basement wall, a drainage pipe penetrating through the waterproof heat preservation assembly is arranged in the basement wall, the waterproof heat preservation assembly comprises a waterproof roll layer, a cement mortar smearing layer and a graphite polystyrene board, and the cement mortar smearing layer and the graphite polystyrene board conduct heat preservation on the window well. According to the building daylighting heat-preservation waterproof window well, the daylighting efficiency and uniformity are improved through the design of the outwards-convex-pyramid-shaped daylighting window and the horn-shaped lower window well, the waterproof heat-preservation assembly is combined with the graphite polystyrene board, heat transfer is effectively prevented, the heat-preservation performance is enhanced, and meanwhile the waterproof effect is improved through the waterproof roll layer and the cement mortar smearing layer.

The invention relates to the technical field of mortar, in particular to cement self-leveling anti-crack and anti-seepage mortar and a preparation method thereof. The cement self-leveling anti-cracking and anti-seepage mortar is prepared from the following raw materials in parts by mass: 50 to 70 parts of Portland cement, 70 to 90 parts of quartz sand, 5 to 10 parts of nano metakaolin, 1 to 3 parts of calcium sulfate, 5 to 10 parts of polyethylene fiber, 1 to 2 parts of nonionic surfactant, 1 to 2 parts of silane coupling agent, 3 to 8 parts of composite basalt fiber, 0.5 to 1.5 parts of polycarboxylate superplasticizer and 1 to 3 parts of defoaming agent. 1-3 parts of hydroxypropyl methyl cellulose, 1-2 parts of a retarder and 0.5-1.5 parts of a coagulant. The mortar material has good anti-cracking performance and anti-seepage performance and excellent durability, can effectively solve the problem that the anti-cracking performance and the anti-seepage performance of the mortar material in the prior art cannot meet the environmental requirements, and is suitable for large-scale popularization and application.

The invention relates to a method for cemented filling of waste rocks after shallow hole shrinkage, and relates to the technical field of mining filling. According to the shallow hole shrinkage subsequent waste rock cemented filling method, the supporting bottom plate structure is formed by filling the cement mortar for one time, a compact bottom plate structure can be formed at the bottom of a goaf, and the bearing capacity of a goaf foundation is improved; the goaf is subjected to secondary filling by directly using underground barren rocks, the utilization rate of mining area resources can be effectively improved, and after the goaf is subjected to grouting filling through the filling system, solidified cement mortar can form a cementitious body with the barren rocks and broken stones, so that the stability of the goaf can be effectively enhanced; according to the method, the goaf is filled and contacted through layered cemented filling, filling of the goaf can be completed, the stability of the goaf is effectively improved, the problems of bottom plate sinking, collapse and the like are avoided, the efficiency and safety of filling operation are improved, the lifting and transporting cost is reduced, and the amount of waste rocks going out of a well is reduced.

The invention discloses an aggregate random distribution concrete PFC (Power Factor Correction) simulation method, which comprises the following steps: a model selection step: determining a parallel bonding model as a mechanical model for concrete material simulation; a cement mortar matrix generation step of generating a cement mortar matrix by using particles in a set size range in a set space range based on the model, and setting pore density, particle density and contact model parameters; a coarse aggregate random distribution simulation step: randomly covering and grouping original particles in the matrix in a grouping and range mode; a concrete numerical model construction step: determining particle classification so as to distinguish cement mortar and coarse aggregate; and a model reliability verification step: comparing indoor test results through a uniaxial compression test. According to the method, the simulation accuracy is improved, the randomness of aggregate is reduced, the model reliability is ensured, the matrix simulation refinement degree is improved, and a method is provided for concrete modeling and performance research.

The invention belongs to the technical field of building materials, and particularly relates to magnesium oxychloride cement mortar containing polyaluminum chloride water purifier waste residues as well as a preparation method and application of the magnesium oxychloride cement mortar. The magnesium oxychloride cement mortar containing the polyaluminum chloride water purifying agent waste residues is prepared from the following components in parts by mass: 45 to 55 parts of magnesium oxychloride cement and gypsum, 100 to 150 parts of the polyaluminum chloride water purifying agent waste residues, 0 to 3.6 parts of citric acid, 0 to 14 parts of styrene-acrylic emulsion, 130 to 170 parts of river sand and 160 to 200 parts of water, the magnesium oxychloride cement is prepared from 480 to 520 parts of magnesium oxide and 190 to 320 parts of magnesium chloride hexahydrate. The magnesium oxychloride cement mortar containing the polyaluminum chloride water purifying agent waste residues can be used as a cement-based pavement patching material, a large amount of polyaluminum chloride water purifying agent waste residues can be consumed, the problem of environmental pollution caused by the waste residues is effectively solved, the water resistance of the magnesium oxychloride cement mortar can be effectively improved, and efficient resource utilization of industrial solid waste is achieved.

The invention discloses a cement mortar test piece strength automatic test system and an automatic test method, and belongs to the technical field of cement mortar test piece fracture resistance and compression resistance tests, the cement mortar test piece strength automatic test system comprises a test piece storage device, a fracture resistance testing machine, a compression resistance testing machine, a fracture resistance cleaning mechanism, a compression resistance cleaning mechanism, a mechanical arm and an upper computer; the mechanical arm can grab the cement mortar test piece on the test piece storage device according to a preset program and place the cement mortar test piece on an objective table of the anti-bending testing machine for carrying out an anti-bending strength test, and the mechanical arm can also grab the cement mortar test piece which is folded into two sections after the anti-bending strength test is completed to the anti-compression testing machine for carrying out a compressive strength test; the upper computer is in signal connection with the anti-bending testing machine and the anti-compression testing machine, and can record the anti-bending strength and compressive strength data of the cement mortar test piece. The full-automatic operation for testing the fracture resistance and the compressive strength of the cement mortar test piece is realized, the productivity is improved, and the problem that the accuracy of a test result is influenced by traditional manual operation is avoided.

The invention discloses modified slag fiber reinforced cement mortar and a preparation method thereof. According to the invention, the modified slag fiber is adopted as a reinforcement body, and the method has the advantages of reasonable utilization of solid wastes, low energy consumption, low cost, environmental protection, high mechanical properties of a mortar test piece, small shrinkage cracking and the like. The nano silica sol is adopted to modify the slag fibers, so that the durability of the slag fibers in a cement material can be better improved, hydration products on the surfaces of the fibers can be distributed more uniformly and densely, and an interface transition area between the fibers and a matrix material is reinforced, so that the strength of the mortar is remarkably improved; the used slag fiber is a fibrous material prepared by taking blast furnace slag and fly ash as raw materials through a blowing or centrifugal thread throwing process, so that the solid waste utilization rate can be increased, and environmental governance and protection are facilitated. According to the implementation of the invention, on one hand, the practical application of the slag fiber in the cement matrix material is explored; on the other hand, solid waste utilization can be promoted.

The invention discloses an anti-cracking cement mortar containing slag and a preparation method thereof, and relates to the technical field of slag cement mortars.The anti-cracking cement mortar is prepared from, by mass, 100 parts of a slag cement raw material, 39-44.5 parts of water, 0.6-1 part of a polycarboxylic acid water reducing agent, 0.3-0.5 part of a super absorbent polymer, 4-5 parts of an exciting agent and 0.03-0.05 part of multi-walled carbon nanotubes; the preparation method of the anti-cracking cement mortar comprises the following steps: premixing the slag cement raw material, the super absorbent polymer and the multi-walled carbon nanotubes for 1-2 minutes, sequentially adding the water, the polycarboxylic acid water reducing agent and the exciting agent, mixing at a low speed for 1-2 minutes, and mixing at a high speed for 3-5 minutes to obtain the anti-cracking cement mortar.

The invention relates to an additive for improving drying shrinkage of alkali slag cement mortar as well as a preparation method and a use method of the additive, and belongs to the technical field of building materials. The admixture comprises the following components in parts by mass: 40-60 parts of lauryl sodium sulfate, 10-20 parts of modified magnesium oxide, 30-50 parts of slag, 2-6 parts of stearic acid and 0.1-0.5 part of a polyether modified organic silicon defoaming agent. Through the synergistic effect of all the components, the internal pore structure of the alkali slag cement mortar can be remarkably improved, and the surface tension of a pore solution can be reduced, so that the dry shrinkage performance of the alkali slag cement mortar is improved, meanwhile, the negative influence on the mechanical property of the alkali slag cement mortar is avoided, and excellent volume stability and durability are provided for the alkali slag cement mortar. The synthesis method is simple, raw materials are easily available, and the method is suitable for industrial production.

The invention discloses a modular assembly type wall convenient to move and a wall assembly method, and relates to the field of assembly type building application, the modular assembly type wall convenient to move comprises a floor and a prefabricated inner wall plate, a groove is formed in the bottom of the prefabricated inner wall plate, a telescopic steel column is installed in the groove, the height of the telescopic steel column can be adjusted, and the height of the telescopic steel column can be adjusted. Therefore, the levelness and the height of the prefabricated inner wallboard are adjusted. The telescopic steel column is arranged at the bottom of the prefabricated inner wall plate to replace a steel pad, the telescopic steel column extends firstly to jack the prefabricated inner wall plate to a certain height, workers can adjust the angle of a steel bar to be aligned with a grouting sleeve, when the telescopic steel column is shortened, the height of the prefabricated inner wall plate can be reduced, and a bin between a floor and the prefabricated inner wall plate is reduced; and when the height of the bin is reduced to be proper, the metal edge sealing strip can be used for replacing cement mortar for bin sealing treatment, grouting work can be rapidly started without waiting for drying of the cement mortar, the working efficiency is improved, and the construction period is shortened.

The invention relates to the technical field of bamboo winding composite material pipelines, and discloses a bionic bamboo joint connector of a bamboo winding pressure pipeline and a processing technology of the bionic bamboo joint connector, the bionic bamboo joint connector is arranged at the connecting part of two sections of axially aligned bamboo winding pipelines, and the bionic bamboo joint connector sequentially comprises an inner lining layer and an outer lining layer from inside to outside, the embedded steel bar reinforcing layer consists of a reinforcing material and embedded steel bar glue; the film covering restraint layer is composed of fiber reinforced cloth and impregnating resin; the socket fastening layer is composed of a metal fastening piece which is connected with the two pipes in a bridging mode. A protective layer is poured, and the whole connector is wrapped with polymer modified cement mortar; the invention further provides a processing technology of the bionic bamboo joint connector. The processing technology comprises the following six steps of pretreatment, lining welding, embedded steel bar reinforcement, film covering constraint, socket fastening and pouring protection. Through the composite structure of crossed truss type embedded steel bars, polymer modified mortar pouring and socket fastening, the connector obtains high connection strength, excellent anti-drawing performance and long-term durability.

The invention relates to a prefabricated reinforced concrete silo and a construction method thereof.A silo body of the silo is provided with a plurality of silo layers formed by mutually assembling and connecting arc-shaped reinforced concrete prefabricated pieces, positioning steel bars are arranged on supports of the silo, and positioning through holes are formed in the reinforced concrete prefabricated pieces; positioning during assembly of the prefabricated pieces is achieved through the positioning steel bars and the positioning through holes which are matched with each other, positioning is simple, convenient and rapid, the bin body assembly efficiency can be effectively improved, the two adjacent barrel layers of the bin body are bonded and fixed through cement mortar, the two adjacent prefabricated pieces of the same barrel layer are matched through concave-convex spigots and locked through locking bolts, and the bin body assembly efficiency can be effectively improved. Every two upper and lower adjacent prefabricated pieces are connected in a sleeve grouting mode, the connecting strength of the prefabricated pieces can be effectively improved, and the structural stability of the silo is improved.

A cement composition includes an ordinary Portland cement, an Arabic Gum in the amount of 0.1 to 2% by weight of the ordinary Portland cement, a sand in the amount of 150% by weight of the ordinary Portland cement, and water in the amount of 40% by weight of the ordinary Portland cement. A cured sample obtained by curing the cementitious mortar composition for at least 2 days has a porous structure including one or more microcracks from 20 to 500 nm wide and 0.1 to 500 μm long, wherein the cured sample has granules from 1 to 20 μm in diameter, the granules are bundles of microfilaments with a length from 0.2 to 5 μm, the bundles have 20 to 1000 microfilaments, and the microfilaments are in the form of cylinders.

The utility model discloses a cement setting time and consistency measuring device, and relates to the technical field of cement paste detection, a rotating table is arranged on a base, a test mold is arranged at the top of the rotating table, a supporting rod is vertically arranged on one side of the rotating table, an automatic measuring instrument is arranged right above the test mold, and the automatic measuring instrument is connected to the supporting rod through a fixing rod; a sliding rod is arranged in the middle of the automatic tester, a test needle is connected to the bottom end of the sliding rod, the infrared camera is arranged on one side of the automatic tester, and a cleaning mechanism is further arranged on the base and comprises a flushing assembly and a wiping assembly. The device can be used for measuring the consistency and the setting time of the cement mortar, repeated operation is not needed, great convenience is brought to measurement, the influence caused by human factors is reduced through automatic measurement and data recording, the result is more accurate and reliable, and the measurement accuracy is high. Meanwhile, an infrared camera is arranged for assisting in judging whether the cement sample reaches an initial setting state or not, so that the measurement error is reduced.

The invention provides a wall building auxiliary positioner. The wall building auxiliary positioner comprises at least two supporting stand columns, a transverse supporting plate connected to the supporting stand columns, a guide plate and a hopper assembly slidably connected to the guide plate. The supporting stand columns are arranged at intervals in the extending direction of a to-be-built brick wall, and the transverse supporting plate is provided with grooves used for supporting the guide plates in the extending direction of the to-be-built brick wall so that the guide plates can be erected between the grooves formed at intervals. The hopper assembly is provided with a cavity used for storing cement mortar and a discharging port, and when the hopper assembly moves in the length direction of the guide plate, the cement mortar in the cavity is laid on the upper surfaces of the lower-layer bricks along the discharging port. The invention further provides a wall building method using the wall building auxiliary positioner.

The invention discloses a novel historic building repair caulking inorganic adhesive and a preparation method thereof, and relates to the technical field of inorganic adhesives. The concrete is prepared from 30-48 parts of dead burned magnesium oxide, 20-30 parts of monopotassium phosphate, 2-6 parts of borax, 6-24 parts of fine aggregate, 3-8 parts of basalt fiber, 5-15 parts of glutinous rice flour and 15-20 parts of water. The preparation method comprises the following steps: step 1, weighing various materials according to the ratio of the raw materials; the preparation method comprises the following steps: step 1, adding dead burned magnesium oxide into a cement mortar stirrer, and then pouring potassium dihydrogen phosphate, fine aggregate, glutinous rice flour, basalt fiber, borax and water into the cement mortar stirrer to be stirred to prepare uniform slurry; step 2, adding dead burned magnesium oxide and the rest of water, and rapidly stirring to obtain magnesium phosphate regenerated inorganic glue; the magnesium phosphate regenerated inorganic adhesive prepared by doping the regenerated fine aggregate and the glutinous rice flour into the magnesium phosphate inorganic adhesive has the advantages of low temperature resistance, good durability, excellent bonding effect, rapid hardening, early strength and high strength.

The invention relates to phase change concrete and a preparation method thereof. The concrete comprises the following components by kg / m < 3 >: 450-650 of Yunnan concrete stone; 200 to 400 parts of phase change aggregate; 450 to 550 parts of cement; 40-60 parts of silica fume; 600 to 800 parts of common sand; 5-7 parts of a high-efficiency water reducing agent; and 120 to 140 parts of water. The method comprises the following steps: 1, drying cloud concrete stone needing to pre-adsorb a phase change material in a drying oven until the weight is constant; 2, drying the paraffin phase change material into a liquid state, putting the cloud concrete stone into the liquid paraffin, and carrying out vacuum adsorption; 3, performing third-time modification on the cloud concrete stone after paraffin adsorption by using ultra-high-performance cement mortar twice and foam mortar once respectively; 4, performing saturated surface dry water absorption treatment on the unadsorbed phase-change material cloud concrete stone; and 5, pouring the Yunnan concrete stone, the phase-change aggregate, the cement, the silica fume and the common sand into a concrete mixer, and uniformly mixing to obtain the phase-change concrete.

The invention relates to the field of building materials, in particular to a fiber-reinforced mortar material and a preparation system thereof.The mortar material comprises, by weight, 1 part of cement, 3 parts of gravel, 0.65 part of tap water and 0.01-0.03 part of fiber, the gravel comprises natural sand and reclaimed sand, and the proportion of the reclaimed sand in the gravel is 30%, 60% or 100%. According to the scheme, for the performance and application of reclaimed sand in cement mortar after natural sand is replaced, systematic research is given, different material proportions can be set according to different engineering requirements by referring to the research result of the scheme, mortar materials suitable for different projects can be produced, and the production cost of the mortar materials can be reduced.

The invention discloses a method and a system for predicting the optimal ratio of fiber-reinforced environment-friendly cement mortar based on machine learning. The method comprises the following steps: collecting experimental data, and carrying out data preprocessing; screening features of extremely strong correlation and strong correlation by using a Pearson correlation coefficient; constructing a bidirectional gating circulation unit network prediction model based on an attention mechanism, extracting features through a bidirectional GRU layer, and weighting key information through an attention layer; training the model by adopting an adaptive moment estimation optimization algorithm, and performing hyper-parameter tuning in combination with a Bayesian optimization algorithm; and after the target performance index is input, the model outputs an optimal ratio combination meeting the requirement. The system comprises a data acquisition and preprocessing module, a feature screening module, a model construction and training module, a hyper-parameter tuning module and an optimal ratio prediction module. According to the method, the attention mechanism and the bidirectional GRU are fused, so that the prediction precision is improved, and an efficient and reliable solution is provided for proportioning optimization of the environment-friendly cement mortar.