1539 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 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 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 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 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 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 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 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 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 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 belongs to the technical field of fiber reinforced composite materials, and particularly relates to a modified chopped basalt fiber and a preparation method thereof. The method comprises the following specific steps: S1, preparing a bacterial liquid: inoculating sporosarcina pasteurii into a weakly alkaline culture medium, and carrying out shaking culture to obtain the bacterial liquid; s2, preparing a mixed solution, namely mixing the bacterial solution and the nutrient solution, and standing to obtain the mixed solution; s3, preparing the modified short-cut basalt fibers: immersing the short-cut basalt fibers in the mixed solution, taking out the short-cut basalt fibers, and drying the short-cut basalt fibers to obtain the modified short-cut basalt fibers. The surface roughness of the fiber modified by the preparation process is obviously improved, and the binding force with a cement-based material is enhanced; the 28d breaking strength of the cement mortar adopting the modified fiber is maximally improved by 27%, and the compressive strength is maximally improved by 11%; the method has the advantages of no chemical pollution, simple operation, low cost, and good application prospect.

The invention belongs to the technical field of base pouring, and particularly relates to a wind power equipment mounting base pouring device and method.The wind power equipment mounting base pouring device comprises a slurry collecting box, a pipe head butt joint cylinder arranged on the surface of one side of the slurry collecting box, and a supporting hollow column fixedly mounted on the edge of the bottom of the slurry collecting box; the slurry conveying pipes are fixedly installed on the surface of the bottom of the slurry collecting box and located at the peripheral edge positions, lap joint supporting plates are arranged on the surfaces of the outer sides of the slurry conveying pipes, and the surfaces of the tops of the supporting hollow columns are fixedly connected to the middle positions of the bottoms of the lap joint supporting plates. An output pipe of the mortar conveying pump truck is in butt joint with the pipe head butt joint cylinder, cement mortar is poured into the flow guide pipe, and along with continuous accumulation of the mortar in the mortar collecting box, the liquid mortar can gradually spread around due to gravity, so that the cement mortar can be conveyed to the mortar collecting box. And meanwhile, mortar in the mortar collecting box is poured and discharged in cooperation with a mortar conveying pipe on the surface of the bottom of the mortar collecting box, and workers stand on the surface of the steel bar frame to pull and swing one end of the mortar conveying pipe in cooperation.

The utility model provides a cement mortar mixing device which comprises a device body, a vertical plate is vertically installed on the edge of the top surface of the device body, supporting rods are symmetrically installed on the top surface of the vertical plate, sliding rails are arranged on the surfaces of the supporting rods, sliding blocks are connected into the sliding rails in a sliding mode, a moving plate is arranged between the two sliding blocks, and the moving plate is connected with the vertical plate. Through cooperative use of a vertical plate, a supporting rod, a sliding rail, a sliding block and a moving plate, when cement mortar is mixed, a mixing blade can be conveniently moved, so that the cement mortar is conveniently mixed, during operation, a worker moves the device body, then the mixing blade is moved to the position over the cement mortar, then an electric air cylinder and a driving motor are started, and the cement mortar can be conveniently mixed. And then the electric cylinder drives the mixing blade to descend through the mounting plate to mix the cement mortar below, and in the mixing process, a worker can drive the impeller to move through the moving plate by virtue of the push handle, so that the cement mortar is convenient to mix, and the working efficiency of the cement mortar mixing device is improved.

The invention relates to the field of shield tunnel design and construction, and discloses a construction method for manufacturing shield synchronous grouting slag slurry by using shield muck, which comprises the following steps: 1) field test and performance determination; (2) muck slurry is mixed and prepared; 3) preparing finished product slurry; and 4) synchronous grouting. Compared with the prior art, the synchronous grouting material has the advantages that the cost of the synchronous grouting material is obviously reduced; the problem that muck is difficult to treat in the shield tunneling process is effectively solved, reutilization of resources is achieved, and remarkable environmental protection benefits are achieved; the prepared novel composite synchronous slag slurry for the shield has good workability and flowability, building gaps in the shield construction process can be fully filled, and the stability and bearing capacity of a tunnel are improved; preparation of slag slurry and cement mortar can be switched at any time, and normal tunneling of a shield is not affected.

The invention discloses a gas and coal spontaneous combustion co-treatment technology under the shallow-buried close-distance coal seam group upward mining condition, and belongs to the technical field of coal mine safety mining. The method comprises the following steps of: constructing a ground well on a coal seam group on the ground, pre-pumping gas of an upper coal seam, mining the upper coal seam after coal and gas outburst danger is eliminated, synchronously utilizing the ground well to pump gas in a front disturbance area and a rear goaf of a working face during mining, injecting cement mortar into the working face by utilizing the ground well above the goaf every time the working face is propelled by 50-60m, spontaneous combustion of residual coal in the goaf is inhibited and overlying strata sinking is reduced. After the upper coal seam is mined and cement mortar in the goaf is solidified, the ground well extends to the middle coal seam and the lower coal seam, and gas pre-extraction, coal seam mining and cement mortar injection are conducted in sequence through the method. According to the technology, gas pre-extraction, coal mining, grouting and other procedures are matched in an echelon mode, gas and coal spontaneous combustion disasters of the shallow-buried close-distance coal seam group can be effectively treated, surface subsidence is reduced, mine production safety is guaranteed, meanwhile, operation is easy, and cost is saved.

The invention relates to the technical field of shield construction, in particular to a construction method for breaking and removing shield obstacles below a subway station through freezing and rotary cutting, and the construction method comprises the following specific steps: forming uniformly distributed pilot tunnel structures around a stand column pile by positioning the position of the stand column pile and horizontally drilling by using a drilling machine; after pilot tunnel drilling is completed, freezing pipes are inserted immediately to freeze soil around the stand column piles; a plurality of guide holes are formed in the stand column pile, hole expanders are placed in the guide holes, and hole expanding is started upwards in sequence; according to the construction method, the soil within the range needing obstacle clearing can be frozen, the supporting performance of the soil during shield construction is improved, and collapse and existing station settlement are avoided; meanwhile, drilling is conducted on the stand column pile, a reamer is adopted to conduct rotary cutting and breaking on the stand column pile, and expansive cement mortar is poured, so that the bearing capacity of the foundation can be guaranteed; obstacles on the subway shield route are removed on the whole, and the influence on the existing station in the construction process is reduced.

The utility model discloses a layered waterproof structure for a temporary reserved hole part of a building roof face, which comprises a temporary hole formed in a concrete floor, a two-way steel bar with the diameter of 8mm is implanted in the inner wall of the temporary hole, a square water stop strip is arranged on the two-way steel bar, and filling concrete is arranged on the outer side of the water stop strip. The filling concrete is coated with an interface agent, the outer side of the interface agent is provided with a cement-based capillary crystalline waterproof coating, and the thinnest part is provided with C5.0 lightweight aggregate concrete with the thickness of 30; a non-cured rubber asphalt waterproof coating with the thickness of 3.0 mm, a viscous polymer modified asphalt waterproof coiled material with the thickness of 3.0 mm, an S20 cement mortar protective layer with the thickness of 10, an extruded polyethylene foam plastic heat preservation layer with the thickness of 100, a low-strength-grade mortar isolation layer with the thickness of 10 and a C20 fine aggregate concrete protective layer with the thickness of 40 are sequentially arranged on the outer side of the C5.0 lightweight aggregate concrete with the thickness of 3.0 mm. The characteristics and functions of different materials are combined, so that the waterproof performance and durability of the building or the structure are effectively improved.

The utility model relates to the technical field of road material testing instruments, and discloses a cement mortar wear resistance testing machine capable of automatically cleaning powder. The cement mortar wear resistance testing machine capable of automatically cleaning the powder comprises a cabinet body, the front side of the cabinet body is slidably connected with a concentric-square-shaped frame extending into the cabinet body, the opposite side of the concentric-square-shaped frame is fixedly connected with sliding rods which are symmetrically distributed front and back, and the outer sides of the sliding rods are slidably connected with clamping blocks which are symmetrically distributed left and right. The device has the advantages of collecting generated dust to prevent the dust from diffusing in the air, grinding in a closed space to prevent stone slag from splashing and the like, and solves the problems that in the prior art, a large amount of cement dust and stone slag can be generated during use of the wear resistance testing machine, the cement dust is diffused in the air and can be inhaled by surrounding people, and the stone slag cannot be splashed. The stone slag is hit away by a wear-resistant testing machine in high-speed operation, so that the surrounding crowd may be hurt.

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.