825 results about "Cement mortar" patented technology

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 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 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 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 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.

The invention relates to the technical field of cement mortar test mold automatic forming equipment, and discloses a cement mortar test mold automatic forming production line. Comprising a cement mortar test mold automatic forming equipment system, a cement mortar test mold automatic robot curing box equipment system, a cement mortar test mold automatic demolding and demolding equipment system, a cement mortar test mold automatic test mold cleaning equipment system and a cement mortar test mold automatic mold filling equipment system. The cement mortar test mold automatic molding equipment system is used for completing molding of a cement mortar test block in the assembled test mold to form a molded test mold; the cement mortar test mold automatic robot curing box equipment system is used for curing a forming test mold; the automatic forming production line for the cement mortar test mold solves the problems that an existing cement mortar test mold is low in efficiency, unstable in quality, large in labor intensity and large in test mold loss during manual operation from assembling, forming, mold stripping to cleaning.

The invention discloses high-toughness and high-adhesion polymerized modified cement mortar with iron-ore slag and a preparation method of the high-toughness and high-adhesion polymerized modified cement mortar, and belongs to the technical field of concrete structure repair materials. High-strength, high-toughness and high-adhesion polymer modified mortar is formed, and the requirements of rapid repair engineering of a cement concrete structure for toughness and adhesion performance are met; the iron-ore slag is adopted to replace part of carborundum as the aggregate, so that the early strength of the mortar is ensured on the premise of meeting sustainable development, and the basic requirements of concrete structure repair are met; meanwhile, the fiber, the redispersible latex powder and the modified rubber powder are added, so that the toughness of the material is improved, the bonding performance is improved, and the stress coordination of the repairing material and an original concrete structure is guaranteed.

The utility model relates to a tunnel portal advance pipe shed structure, and relates to the technical field of tunnel construction.The tunnel portal advance pipe shed structure comprises multiple sets of mounting holes formed in a tunnel portal guide wall at intervals and pipe shed steel pipes facilitating concrete pouring in the mounting holes, and multiple sets of grouting holes are formed in the pipe shed steel pipes; the utility model discloses a reinforcement cage for improving pipe shed steel pipe supporting strength. The pipe shed steel pipes are installed in the installation holes in a sealed mode, the reinforcement cage is installed in the pipe shed steel pipes, meanwhile, the reinforcement cage does not affect pouring of cement mortar in the pipe shed steel pipes, and then gaps between the pipe shed steel pipes and the installation holes are tightly filled with the cement mortar through the pipe shed steel pipes; the interiors of the pipe shed steel pipes are jointly supported through the reinforcement cage and the cement mortar, then the rigidity and strength of a single set of pipe shed steel pipes are improved, the multiple sets of pipe shed steel pipes jointly form the advance pipe shed, finally, the supporting acting force of the advance pipe shed on a soil body at a tunnel portal is improved, and the probability that the pipe shed deforms is reduced.

The invention provides a safe and efficient combined mining method for a near-surface thick and large low-grade ore body under a broken ore rock condition, and belongs to the field of mining. The first-step stope adopts a downward large-diameter deep hole subsequent filling method, horizontal and vertical anchor cable holes are constructed in a drilling chamber at the top of the stope, and the vertical anchor cable holes are communicated with the ground surface; a subsection medium-length hole subsequent filling mining method is adopted in the stope in the second step, and downward anchor cable holes are constructed in the earth surface above the stope to the boundary of the ore body; after cement mortar is injected into the anchor cable holes, orifice anchor cables are connected in series, prestress is applied, and a combined anchor cable supporting system is formed; filling immediately after the stope is mined in the first step; and after the filling body reaches the preset strength, filling after mining is carried out on the second-step stope. Through application of the combined supporting structure and the mining technology, near-surface thick and large low-grade ore body resources can be safely and efficiently mined, underground occurrence resources are fully utilized, and continuous high-quality development of mine enterprises is guaranteed.

A sea area stratum shield tunneling grouting intelligent management and control system and method comprises a storage subsystem, a pipeline subsystem and a grouting front-end subsystem, and a cement mortar storage system and an accelerator storage system are connected with a synchronous grouting front-end system and a secondary grouting front-end system through a synchronous grouting pipeline and a secondary grouting pipeline. And the synchronous grouting front-end system and the secondary grouting front-end system control the flow and the speed in the pipeline through an electric control valve. Automatic control and synchronous grouting evaluation indexes are adopted, the effects of synchronous grouting and secondary grouting can be effectively improved, the grouting quality is improved, building gaps can be filled in time, stratum deformation can be effectively controlled, the settling volume of a tunnel is reduced, and the anti-seepage and waterproof effects of the tunnel can be improved; the synchronous grouting accelerator is automatically added, the adding rate can be accurately controlled, and accurate metering can be achieved; the residual amount of the grouting materials is automatically checked after each ring in the shield tunnel is tunneled, and the ground terminal can timely prepare the quantity of the materials of the next ring according to real-time data.

The invention relates to the field of buildings, in particular to a laminated construction method for combining prefabricated pipe pieces and prefabricated linings. The method comprises the following steps that a prefabricated pipe piece and a prefabricated lining are combined to achieve overlapping construction; the concrete grade is the same as or does not exceed one concrete grade difference with the prefabricated pipe piece, and the prefabricated lining and the prefabricated pipe piece are combined into an overlapped structure in any one of the connection modes of embedded steel bar connection and embedded sleeve and stainless steel bolt pair connection; a gap is reserved between the prefabricated lining and the prefabricated pipe piece, the end is blocked by a steel plate or a concrete block, a grouting hole is reserved in the bottom, and an exhaust hole is reserved in the top; and after the jacking of the two parts is completed, grout such as non-shrinkage or micro-expansion cement paste and cement mortar is filled in the gap.

The utility model belongs to the field of cement fluidity detection, and discloses a cement mortar fluidity detection device which comprises a measuring disc, and a vibration mechanism is arranged at the bottom of the measuring disc; the inner side of the outer circular ring is matched with the measuring disc, an inner circular ring is fixed to the inner side of the outer circular ring, and the bottom surface of the inner circular ring abuts against the measuring disc; the measuring mechanism comprises a movable unit and a measuring scale, the movable unit is movably installed on the outer circular ring and located above the inner circular ring, and the measuring scale is installed on the movable unit. Through the arrangement of the outer circular ring and the inner circular ring, the outer circular ring, the inner circular ring and the measuring mechanism can be integrally placed on the measuring disc in a hanging and overlapping manner, so that when the measuring disc needs to be cleaned, loaded and unloaded, the outer circular ring and the like do not interfere with the work of a worker, and the worker can better control the measuring disc.

The application relates to an epoxy polymer modified cement mortar coating device and belongs to the technical field of building construction. The device comprises a base and a sludge pump assembly, the top of the base is fixedly connected with two support frames, the outer wall of the support frame is slidably sleeved with sliding blocks, a slurry frame for containing cement is fixedly connected between the two sliding blocks, the top of the slurry frame is fixedly connected with a first scraper for smearing the cement on a wall surface, the second motor is started to drive the third scraper to rotate to polish the wall, the polished particles can be collected into the collecting frame, the first motor is started to drive the slurry frame to ascend and drive the arc-shaped plate to dig the cement, the cement is moved to the second scraper, the cement is moved to the first scraper, the cement quantity is controlled, and the device is convenient to use.

The invention discloses an advanced grouting reinforcement method for fractured rock mass of an open slope, and belongs to the technical field of open-pit mine mining. The method comprises the following steps: firstly, establishing a fracture density characterization model by quantifying fracture density, and determining a fractured rock mass area; secondly, converting the fracture density characterization model into a mechanical parameter characterization model, non-uniformly assigning mechanical parameters to each unit grid in the slope numerical model, and simulating and determining an area to be reinforced; and in the area needing to be reinforced, grouting holes with equal intervals are constructed in an array mode perpendicular to the final boundary platform, segmented pressurized grouting is conducted in the grouting holes from the bottom, and the advanced grouting reinforcing structure is formed. The fractured rock masses to be exposed are bonded into a whole by filling the cracks with the cement mortar, blasting excavation disturbance is jointly borne, the stability of the side slope is improved, and the method has the advantages of being simple in construction process, low in cost, high in construction efficiency and the like.

This utility model discloses a prefabricated drainage ditch installation device with a guiding and positioning structure, comprising: a base layer, a bottom plate at the bottom of the base layer, and a support plate for supporting the whole; the inner surface of the base layer is filled with a layer of cement mortar, and the inner end of the upper surface of the base layer is provided with a plurality of positioning holes at equal intervals from front to back; the bottom end of the cement mortar layer is provided with a bottom plate, and the upper surface of the bottom plate is provided with adjustment grooves on both the left and right ends; the upper surface of the bottom plate is provided with side plates on both the left and right ends; the bottom outer end of the side plate is fixedly connected with a connecting protrusion, and the bottom upper surface of the side plate is provided with a connecting groove; the inside of the connecting groove is engaged with the bottom end of the support plate. This prefabricated drainage ditch installation device with a guiding and positioning structure can guide and position the drainage ditch before pouring cement into it, avoiding installation failure and material waste.

The invention relates to the technical field of concrete filling, in particular to a self-propelled concrete strip-shaped mold filling device and a filling method thereof.The self-propelled concrete strip-shaped mold filling device comprises a driving assembly, a feeding assembly used for conveying concrete is arranged on the driving assembly, and a transverse moving assembly used for driving the feeding assembly to horizontally move left and right is arranged below the driving assembly; support assemblies are symmetrically arranged on the left and right sides of the driving assembly. According to the device, by arranging the transverse moving assembly, when self-walking filling is conducted along the strip-shaped mold, left-right sliding can be conducted, the filling range is widened, meanwhile, the filling uniformity is improved, and then the filling quality is improved; by arranging the feeding assembly, a vibrating plate can be driven to vibrate continuously, gas in the cement mortar is reduced, and the filling quality is further improved; in addition, by arranging the support assembly, the filling height can be increased along with filling, and the situation that due to the fact that the initial height is too high, coarse aggregate and fine aggregate in filled cement mortar are not evenly distributed, and the filling quality is affected is avoided.

The utility model belongs to the technical field of cement mortar tests, and particularly relates to a cement mortar anti-bending testing machine which comprises a base, a stand column installed in the middle of the base and a lever rotationally connected to the upper end of the stand column, a balance weight is arranged at the left end of the lever, and an anti-bending clamp is installed at the bottom end of the lever through a transmission connecting rod. An adjusting rotating disc is arranged at the bottom end of the anti-bending clamp, a graduated scale is installed at the right end of the lever, a moving weight is arranged outside the graduated scale, and a servo motor is installed at the lower end of the balance weight. The two trays capable of transversely moving are installed at the left end of the base, sliding bases in the two sliding rails can drive the two trays to rapidly move to the lower end of the anti-bending clamp, detachable inner frames are installed in the two trays, and the two inner frames can collect cement mortar in the anti-bending clamp during an experiment; the cement mortar is effectively prevented from falling onto the base, and the integrity of the cement mortar is ensured, so that the fracture of the cement mortar is conveniently observed.

The utility model relates to the technical field of building construction, and discloses a basement side wall anti-drainage combined structure during reverse building method construction, which comprises clay, a P8 anti-seepage grade continuous wall serving as a side wall is arranged on the inner wall of the clay, one side of the P8 anti-seepage grade continuous wall serving as the side wall is provided with spraying concrete for leveling, and the other side of the P8 anti-seepage grade continuous wall serving as the side wall is provided with spraying concrete for leveling. A waterproof agent is arranged on the side, serving as the side wall, of the P8 impervious grade continuous wall, a waterproof coating is arranged on the inner wall of the P8 impervious grade continuous wall, a cement mortar protection layer is arranged on the inner wall of the P8 impervious grade continuous wall, a waterproof cement fiber wall plate is arranged on the side, serving as the side wall, of the P8 impervious grade continuous wall, and the waterproof cement fiber wall plate is arranged on the side, serving as the side wall, of the P8 impervious grade continuous wall. According to the utility model, through a mode of combination of prevention and drainage, the leakage rate of the side wall is reduced through a reverse construction method, the maintenance cost is reduced, the structure durability and the wall surface flatness are both realized, the waterproof effect is improved, and the construction cost is reduced. And the service life of the building is prolonged.

The invention relates to a desulfurization method of oil shale residues, which comprises the following steps: step 1, crushing the oil shale residues at room temperature, and then carrying out ball milling on the oil shale residues in a ball mill to obtain refined particles; 2, carrying out heat preservation and desulfurization on the refined particles in a muffle furnace; 3, the desulfurized refined particles obtained in the step 2 are soaked in an alkaline solution, then neutralized with an acid solution and finally washed repeatedly with clear water; and 4, drying the refined particles obtained in the step 3. The desulfurization method provided by the invention can effectively reduce the content of sulfur element in the oil shale residues and reduce the harm of the oil shale residues to the environment; the invention further provides cement mortar prepared from the oil shale residues prepared by the desulfurization method, the cement mortar is higher in compressive strength and flexural strength, lower in porosity, higher in density and higher in applicability, the production cost is saved, and the environment-friendly concept of recycling solid waste is met.

The invention provides a channel of a pre-embedded line pipe and a dry-method sealing construction method of the channel, and belongs to the technical field of building construction. The embedded wire pipe comprises an inverted-T-shaped channel which is formed in a wall base layer and used for providing an installation space for the embedded wire pipe; the caulking rock wool strips are used for filling gaps between the line pipes and gaps between the line pipes and the wall body; the plugging rock wool board is applied to the outer side of the caulking rock wool strip and completely fills the U-shaped channel; the non-cured asphalt layers are painted on the expanded grooves in the two sides of the U-shaped channel; and the cement pressure plate cover plate is used for covering the inverted-T-shaped channel, is levelly aligned with the wall base layers on the two sides and serves as a final covering layer for closing the inverted-T-shaped channel. According to the method, surface layer reflection cracks caused by the fact that cement mortar or fine aggregate concrete is adopted to seal the line pipe groove due to the fact that a filling material is prone to water loss and shrinkage and not prone to being filled densely and different materials are different in temperature shrinkage can be effectively avoided, and meanwhile the sound insulation performance of the line groove is guaranteed by filling the caulking rock wool strips and blocking the rock wool board.

The invention discloses a method for preparing a randomly distributed open crack rock sample based on polypropylene fiber, which comprises the following steps: preparing cement mortar according to the type and strength of rock, and then adding polypropylene fiber; cement mortar containing polypropylene fibers is poured into the cement mortar mold and fully vibrated; the initial set sample is demolded and maintained, the sample is detected through a non-metal ultrasonic detector, and rock-like samples with abnormal wave velocity are removed; heating the rock-like sample in a high-temperature furnace to melt polypropylene fibers in the rock-like sample so as to form randomly distributed open cracks; and taking out the sample after the sample is cooled, so as to prepare the rock-like sample with randomly distributed open fractures. The randomly distributed polypropylene fibers in the rock-like sample can be melted and evaporated at high temperature, so that randomly distributed open fractures are formed in the rock-like sample, no thermal damage is caused to the rock-like sample, the principle is simple, the sample manufacturing process is convenient and fast, and the difficulty in manufacturing the rock-like sample with the randomly open fractures is well solved.

The invention discloses a calcined muck activity evaluation method based on combination of macroscopic mechanical properties and microscopic ion dissolution performance. The method comprises the following steps: pretreating building muck; calcining the muck at different temperatures; carrying out an ion dissolution test to determine the dissolution concentrations of Ca < 2 + >, Al < 3 + > and Si < 4 + >; mixing the calcined muck cement mortar test piece, and measuring the fracture resistance / compressive resistance of the calcined muck cement mortar test piece; and finally, comprehensively evaluating the activity of the calcined muck by combining the ion dissolution concentration of the calcined muck in the alkali liquor and the test result of the mechanical strength of the test block. Through macro-micro combination, false coagulation phenomenon misjudgment is avoided, multi-dimensional and dynamic evaluation of activity is realized, long-term performance can be accurately predicted, a calcination process can be optimized, and the method is suitable for resource utilization of muck of different sources and has comprehensiveness, accuracy, high efficiency and environmental benefits.

The invention discloses a local deepening foundation waterproof support construction method in a deep foundation pit. The method comprises the steps that the soil texture condition of a to-be-excavated land is obtained, and the foundation pit is excavated and leveled; after a first concrete cushion layer is poured at the bottom of the foundation pit, a cement mortar bonding layer is laid; installing a single-wall bottomed steel jacket box and then injecting water; concrete is poured on the outer wall of the single-wall steel jacket box with the bottom; a waterproof layer and a waterproof protection layer are arranged after a second concrete cushion layer is poured; binding foundation steel bars; an inner formwork is installed on the foundation steel bars in the single-wall bottomed steel jacket box; and foundation concrete is poured, and construction is completed. The invention relates to a construction method for a local deepening foundation waterproof support in a deep foundation pit, which effectively solves the problems of high difficulty, poor effect, long period and high cost of the traditional local deepening support construction of the deep foundation pit through a core technical scheme of a single-wall steel jacket box with a bottom, micro-expansion concrete filling, refined waterproof joints and synchronous construction.

The invention relates to the technical field of stirrers, and particularly discloses a cement mortar stirrer for concrete production, which comprises a fixed base, the top of the fixed base is fixedly connected with a lower tank body, the top of the lower tank body is fixedly connected with an upper tank body, and the side surface of the upper tank body is fixedly connected with a feeding device. The top of the upper tank body is fixedly connected with a motor, the feeding device comprises a spiral ring and a conical pipe, the bottom of the spiral ring is fixedly connected with a connecting rod, the end, away from the spiral ring, of the connecting rod is fixedly connected with a sliding plate, and the top of the conical pipe communicates with a guide assembly; the threaded ring is arranged on the side face of the transmission assembly in a sleeving mode and is in threaded connection with the side face of the transmission assembly, the side face of the sliding plate makes contact with the inner wall of the upper tank body, and the conical pipe is arranged at the position, deviating from the center, of the side face of the upper tank body.

The utility model relates to the technical field of constructional engineering detection instruments, in particular to a tester for detecting the compressive strength of cement mortar on site, which comprises a mounting frame, a jacking piece, a detector, a display and a stop block, the detector is arranged on the inner side of the mounting frame and used for containing cement mortar in the using state and detecting the compressive strength of the cement mortar. The jacking piece is installed at the bottom end of the inner side of the installation frame, and an ejector rod is connected with the detector. According to the utility model, on-site cement mortar is contained in a surrounding blocking manner through the detector, so that when the ejector rod of the jacking piece drives the detector to be matched with the check block to extrude the cement mortar, the extruded body and disintegrating slag of the cement mortar are stored on the inner side of the detector, and the disintegrating slag is prevented from splashing and falling off; meanwhile, the display displays the cement mortar pressure detection value of the detector, so that the tester for the compressive strength of the cement mortar is simple in structure and convenient and rapid to maintain.

The present application belongs to the technical field of slope anchoring and treatment, and relates to a method for anchoring and treating a slope of an abandoned acid mine waste rock pile, wherein anchor pipe rods are installed in the slope region of the abandoned acid mine waste rock pile, a repair reagent is first injected into the waste rock pile through the anchor pipe rods, cement mortar is then injected, and curing is performed until the design strength is reached; anchor pipe rods are installed in the deep region of the abandoned acid mine waste rock pile containing stored acid wastewater, and a repair reagent is injected into the waste rock pile through the anchor pipe rods. The present application injects a repair reagent and cement mortar into the abandoned acid mine waste rock pile through anchor pipe rods, reduces disturbance to the waste rock pile, the repair reagent can passivate the acid waste rock layer around the anchor pipe rods, reduces corrosion to the anchor pipe rods, ensures long-term anchoring, the anchor pipe rods in the slope region can be more closely combined with loose rock-soil bodies, the anchoring effect is better, and the repair reagent injection combined with the anchor pipe rods in the deep region can strengthen treatment of the region containing stored acid wastewater.

The invention relates to the technical field of wear-resistant terrace construction, and discloses a construction method of a wear-resistant terrace. The method comprises the following steps: (1) pouring an interface agent on a base layer to obtain an interface agent layer; the interface agent is neat cement paste or a combination of neat cement paste and polymer emulsion; (2) semi-dry slurry containing dry and hard cement mortar is laid on the interface agent layer for fine leveling construction, and a dry and hard cement mortar layer is obtained; the mass ratio of dry hard cement mortar to water in the semi-dry slurry is 100: (7-11); and (3) sequentially arranging a wear-resistant aggregate layer and a curing agent layer on the upper surface of the dry hard cement mortar layer to obtain the wear-resistant floor. By means of the construction method of the wear-resistant floor, one-time precise leveling can be achieved, and the construction period is remarkably shortened.

The application discloses a kind of quick detection methods of mineral powder activity.The steps are: taking activating agent and water configuration activation solution, according to GB / T 17671 "cement mortar strength test method" method, activation solution, mineral powder and sand are prepared and test block is formed, and after 15-17h in standard mortar curing box, formwork is dismantled, again, it is placed into oven and is maintained 6-8h after film coating, cooling to room temperature carries out compressive strength test, and the activity index of mineral powder is calculated by the calculation formula of compressive strength and activity index.The application utilizes alkali-sulfate and seed compound excitation characteristics, and combines high-temperature rapid curing system to quickly stimulate mineral powder activity, effectively shortens mineral powder hydration period, and the activity index detection time is shortened from original 28d to 1d by test block compressive strength, greatly improves mineral powder activity index detection efficiency, and accuracy is higher, and is suitable for promotion and application.

The utility model provides a cement stirring device with double stirring shafts, which belongs to the technical field of stirrers and aims to solve the problems that an operator needs to lift a handle of the stirrer for pushing when the existing hand-push stirrer is moved, and the labor intensity of the operator is high. The roller shaft is slidably connected to the interior of the right side of the mounting seat; the two rear rolling wheels are rotationally connected to the front side and the rear side of the rolling wheel shaft correspondingly; the stirring motor is fixedly connected to the right side of the mounting seat; the transmission box is fixedly connected to the right side of the mounting seat; the double-shaft stirring assembly is arranged in the transmission box and the stirring tank; and the stable supporting assembly is arranged in the right side and at the bottom of the mounting base. The cement mortar stirring device is easier and more labor-saving to move, the stirring tank and the mounting seat are supported more stably, and the stirring efficiency of cement mortar is effectively improved.

The utility model discloses a cement mortar gravel separating device, including shell, centrifugal mechanism, swing mechanism and discharge mechanism, wherein the centrifugal mechanism is provided in the shell, and centrifugal mechanism passes through the side wall of shell, be provided with the water storage cylinder above the centrifugal mechanism, the bottom surface of water storage cylinder is communicated with a plurality of nozzles, the water storage cylinder is communicated with the water pipe, and the water pipe is communicated with the swing mechanism. The water conveying pipe penetrates through the top wall of the shell, the swing mechanism is arranged on the shell and connected with the water storage barrel, a support is arranged below the shell, two mounting plates are oppositely arranged on the support and rotationally connected with rotating shafts, the two rotating shafts are connected with the two sides of the shell respectively, a hydraulic column is hinged between the support and the shell, and the hydraulic column is connected with the water storage barrel. The discharging mechanism is arranged at the bottom of the shell. Therefore, the outer wall of the centrifugal mechanism can be effectively washed, cement paste and fine sand attached to the outer wall of the centrifugal mechanism can be removed, the screen holes are prevented from being blocked, and the sand and stone separation efficiency is effectively improved.