74 results about "Sorptivity" patented technology

The invention discloses a plugging particle, a preparation method, application and a grouting material, the plugging particle is of a core-shell structure and comprises a force-bearing inner core, the force-bearing inner core is coated with an expansion functional layer, and the expansion functional layer is coated with a delayed hydrogel outer film layer; wherein the inner core is made of one or more of quartz sand, kaolin and inorganic fibers; the expansion functional layer comprises modified bentonite and a super absorbent polymer; the delayed hydrogel outer film layer comprises a water-soluble film; the particle size of the blocking particles is 0.5 to 2.5 mm; through material structure optimization and response mechanism design of the functional plugging particles and the special grouting liquid, the automatic plugging function in the grouting process without mechanical triggering, a chemical expanding agent and a complex plugging device is achieved; and the method is suitable for scenes with high requirements on plugging precision, construction efficiency and structural stability in complex rock mass crack grouting engineering.

The invention discloses a method for preparing a concrete curb by using detoxified fly ash and the concrete curb. The concrete curb is prepared from the following raw materials in parts by weight: 200-250 parts of cement; 0-60 parts of fly ash; 50-70 parts of mineral powder; 15 to 60 parts of detoxified fly ash; 1700 to 1900 parts of aggregate; 170 to 200 parts of water; and 2-5 parts of a water reducing agent. The detoxified fly ash can be effectively digested, the resource utilization rate is increased, meanwhile, the compressive strength of the product can be improved, and the water absorption performance and the freeze-thaw resistance both meet the requirements.

The invention discloses recycled aggregate concrete slurry and a prefabricated concrete laminated slab, and belongs to the technical field of prefabricated building materials. The recycled aggregate concrete slurry consists of a cementing material, aggregate, a functional additive, an additive and mixing water, the functional additive is selected from super absorbent resin, end hook type steel fiber and polypropylene fiber; the aggregate is composed of recycled coarse aggregate, natural gravel and medium sand; the additive comprises a water reducing agent. Concrete prepared from the recycled aggregate concrete slurry has excellent normal-temperature comprehensive mechanical properties, excellent high-temperature burst resistance, good workability and volume stability and certain economical efficiency and environmental friendliness. The recycled aggregate concrete slurry is used for preparing the prefabricated concrete laminated slab, and the obtained prefabricated concrete laminated slab has excellent durability and good safety.

The invention provides a capillary crystalline agent core material microcapsule and a preparation method and application thereof, and relates to the technical field of material science and engineering, the capillary crystalline agent core material microcapsule comprises a wall material and a core material; the wall material comprises a water-absorbing material, the water-absorbing material comprises at least one of sodium alginate and modified sodium alginate, and the mass of the water-absorbing material is not lower than 60% of the mass of the wall material; the core material comprises a capillary crystalline agent and a dispersing agent, and the mass of the capillary crystalline agent is not lower than 60% of the mass of the core material; the mass ratio of the wall material to the core material is (3: 7): (7: 3); and the particle size of the capillary crystalline agent core material microcapsule is 50-300 microns. The capillary crystalline agent core material microcapsule is applied to concrete repair, the crystallization reaction can develop along the depth of a crack, invasion of water and corrosive ions is inhibited for a long time, the service life of the structure is prolonged by 2-3 times, and the compressive strength / breaking strength of a repaired crack area can be recovered to 90% or above of that of original concrete.

The invention discloses a long-distance pressure tunnel positioning method based on inner wall feature texture auxiliary identification, and the method is based on the fact that the inner wall of a long-distance pressure tunnel presents different feature textures at different times due to the non-uniform water absorption of the inner wall material. Meanwhile, in combination with the difference of characteristic textures such as pores, gaps, denudation, damage, aging and attachments of concrete structures at different parts of the tunnel and the relevance of the characteristic textures at the same position and at different time, the characteristic textures of the inner wall are associated with the specific position by adopting a mode similar to fingerprint identification based on a panoramic database constructed in a non-pressure period and an emptying period; and finally, comprehensive, accurate and rapid positioning of the underwater non-defect area and the defect area in the'pressure period 'in the long-distance pressure tunnel is achieved.

The invention discloses a construction evaluation method for building masonry, which comprises the following steps: establishing a stratum acquisition area in a construction area, acquiring a soil sample, and dividing the soil sample into a hard soil layer and a soft soil layer according to the water absorption of the soil layer; according to parameters of different stratums, design parameters of a foundation pile and a foundation ground beam are formulated, the foundation pile and the foundation ground beam serve as a foundation of a construction building masonry, a simulation model is established according to data of the foundation pile and the foundation ground beam, and stress needing to bear the building masonry is applied to the simulation model. And evaluating the stability of the foundation piles, the foundation ground beams and soil layers and rock stratums under the foundation, and giving construction suggestions. According to the scheme, detailed stratum test data and a comprehensive stability analysis method of construction analogue simulation are combined, so that the safety and the reasonability of the construction design scheme of the building masonry are ensured, and a solid foundation is provided for construction safety and smooth service.

This application relates to a foundation pit structure and its construction method, comprising a foundation pit main body with a support structure installed. The support structure includes a reinforcement component and a drainage component. The drainage component is installed on the reinforcement component and includes a fall arrest net and a drainage pipe. The drainage pipe is installed inside the reinforcement component. One side of the fall arrest net is connected to the reinforcement component. The fall arrest net has multiple water storage channels inside. The bottom of the fall arrest net is in contact with the bottom of the foundation pit main body. The bottom of the fall arrest net is provided with a water-absorbing fixing component, which is driven into the bottom of the foundation pit main body. The reinforcement component includes corner reinforcement components and vertical reinforcement components. The corner reinforcement components are fixed at the corners of the foundation pit main body and fit against the corner walls of the foundation pit main body. The vertical reinforcement components are connected to the corner reinforcement components. The foundation pit structure of this application is robust, less prone to lateral collapse, and facilitates drainage.

The utility model relates to strip cleaning technical field, concretely is a kind of strip cleaning after quick removal residual moisture device, including mounting seat, two rows of high-speed fan are fixedly installed on the mounting seat, two rows of high-speed fan are used for passing through for strip between, the air outlet of high-speed fan is fixedly installed with the air scoop of output port alignment strip, the drying box of being located in the upper and lower sides of strip is fixedly installed on the mounting seat, a side for being used to contact with the dry towel of strip is wrapped on the drying box. By setting high-speed fan, most of the moisture on the surface of strip is blown away from the strip, the residual moisture is wiped off by the subsequent dry towel, the moisture can be completely removed from the surface of strip, the production efficiency is improved, and the dry towel can be dried, so that the dry towel always maintains good water absorption performance. Even if the strip keeps full-speed operation, the drying quality can still be guaranteed, the subsequent coating process is facilitated, and the quality of the strip is guaranteed.

Provided are a method for producing a recycled water-absorbing resin which achieves reduction in deterioration of water absorption performance and reduction in coloration, and a method for producing a water-absorbing resin with use of the recycled water-absorbing resin. An embodiment of the present invention relates to, for example, a method for producing a recycled water-absorbing resin from a used absorbent article, the method including: a urea removal step of removing urea so that a urea content in the recycled water-absorbing resin becomes 2 mass% or less; and a recovery step of recovering a water-absorbing property.

The invention discloses a multi-parameter joint evaluation method for transmission performance of ultra-high performance concrete, and belongs to the technical field of concrete durability evaluation. The multi-parameter joint evaluation method comprises the following steps: preparing an ultra-high performance concrete test piece with a gradient function; calculating a steel fiber distribution coefficient; obtaining a slice test piece; performing a gas permeation test on the test piece with the undamaged slices; performing a capillary water absorption experiment on the test piece with the undamaged slices; carrying out a splitting tensile strength test to obtain slice test pieces with different damage degrees; performing a gas permeation test and a capillary water absorption test on the damaged slice test piece; and calculating and fitting the experimental results to obtain a concrete transmission performance multi-parameter joint evaluation equation set under the steel fiber distribution coefficient. According to the method, the gas transmission performance and the capillary water absorption are tested at different slice positions of the ultra-high performance concrete test piece with a certain mixing ratio, the evaluation process of the concrete transmission performance is obtained, the process of permeability evaluation through multiple parameters is introduced, and the accuracy of the evaluation result is improved.

This utility model discloses a fireproof hollow insulation board, comprising an insulation board, and relates to the technical field of insulation boards. This fireproof hollow insulation board, by installing water-resistant plates on the contact surfaces of the front and rear sides of the insulation board, allows the water-resistant plates to form water-resistant gaps between the insulation board and the wall, and between the insulation board and the external cement slurry, effectively maintaining the insulation performance and structural stability of the insulation board. Secondly, raised dots are provided on the surface of the front water-resistant plate, ensuring the integrity of the mortar and preventing its flow, thus avoiding significant mortar spillage onto the ground during the bonding process with the wall. Furthermore, an inner circular groove is provided inside the front water-resistant plate, and an opening smaller than the inner circular groove is provided on the front side, allowing the mortar to fill the interlayer between the inner circular groove and the opening. After the mortar solidifies, the above combination improves tensile strength and enhances overall robustness.

The application provides a building curtain wall and a construction method and application thereof, and the building curtain wall comprises the following raw material components by weight: cementing material 100 parts, admixture 5-40 parts, additive 0.1-10 parts, superabsorbent polymer 0.1-5 parts, conductive polymer 0.1-10 parts, water 10-40 parts, aggregate 10-30 parts and electrode material 10-30 parts. The application adopts traditional cementing material-based building material to construct a building curtain wall with energy storage function, a self-luminous system based on the building curtain wall utilizes photoelectricity and thermoelectricity to generate electricity, and additional electricity from a power grid is not needed, a photoelectron system is based on solar power generation, a thermoelectron system effectively utilizes a large amount of waste heat generated in a photovoltaic cell power generation process, the whole power generation process does not involve carbon emission, and the electricity generated by the power generation system is stored in the building curtain wall and used for supplying power to the luminous system at night, so that energy is saved and consumption is reduced.

This invention provides a non-fired magnesia-calcium brick and its preparation method, belonging to the field of refractory materials. Its raw materials include aggregates, fine powder, graphite, binders and composite additives, wherein the composite additives contain calcium nitrate tetrahydrate. The non-fired magnesia-calcium brick of this invention has the following beneficial properties: (1) The composite additives are uniformly distributed in a network in the non-fired magnesia-calcium brick. Due to the dehydration reaction of calcium nitrate tetrahydrate in the composite additives during the brick drying process, a uniform network crack is formed in the finished brick, thereby improving the thermal shock resistance of the product; (2) The calcium nitrate formed by the dehydration of calcium nitrate tetrahydrate has strong water absorption, effectively protecting the CaO in the brick from hydration and improving the hydration resistance of the product; (3) During the high-temperature use of the finished non-fired magnesia-calcium brick, the calcium nitrate undergoes melting and decomposition to transform into highly active CaO, and reacts with SiO2 introduced in the composite additives to form a combined phase, improving the medium-temperature performance of the non-fired magnesia-calcium brick.

The present application relates to a kind of preparation methods of modified waste concrete recycled aggregate, comprising: after crushing waste concrete, screen suitable particle size as the raw material of recycled aggregate, water washing is carried out by oscillation screen to remove part of edge and the corner that will soon fall off, using nano-silica, water-soluble silicate etc. Modification solution carries out gelation reaction, the micro-pore on the surface of concrete particle is plugged and repaired, makes its structure complete and densification, enhances the mechanical strength of aggregate, reduces porosity and water absorption, again by phenolic resin coating further reduces water absorption and enhances mechanical strength. Using the modified waste concrete recycled aggregate, mixed with cement, zeolite powder etc. And is pressed into blank, after carbonization maintenance, obtain the artificial stone with excellent mechanical properties and low water absorption rate.The method of the present application has good application prospect and environmental protection significance.

The present application relates to the technical field of railway subgrade disease, and discloses a construction process for treating railway subgrade disease by adopting bed closure and subgrade body grouting, which comprises the following steps: step one: according to requirements, carry out the extraction of the sleeper and the square sleeper, the excavation of the bed and the bed, and the laying of the thick crushed stone cement layer at both ends of the bed and the surface layer of the bed, and the mixing of the super water-absorbing resin and the silica gel desiccant in the thick crushed stone cement layer; the water-absorbing stone cement layer is laid on the top of the thick crushed stone cement layer, the porous structure of the water-absorbing stone cement layer is used to quickly absorb water, and the water is discharged from the side of the bed through the water outlet pipe, so that the water is prevented from accumulating in the bed; the super water-absorbing resin and the silica gel desiccant are mixed in the thick crushed stone cement layer, the super water-absorbing resin and the silica gel desiccant are used to increase the water absorption performance of the thick crushed stone cement layer, and after the completion of water absorption, the silica gel desiccant can be reused by evaporating the moisture in the silica gel desiccant through high temperature.

A method of analyzing an auxiliary cementitious material (SCM) may include obtaining a sample comprising the SCM; immersing the sample in an alkaline or acidic aqueous solution, thereby subjecting the sample to dissolution; determining the ion concentration in the alkaline or acidic aqueous solution for a predetermined time after the sample is immersed; and predicting reactivity of the SCM in the gelling mixture based on the ion concentration. In another embodiment, a method of analyzing SCM may include obtaining a sample including SCM; placing the sample on a porous substrate in contact with a water source; measuring a change in water level of the water source as the sample absorbs water passing through the porous substrate; and determining the water absorbency of the sample. The hydroscopicity may predict yield stress and / or viscosity of a gelling mixture including the SCM.

The application discloses a kind of freeze-thaw damage self-repairing foam concrete materials and preparation method thereof, it is related to building material technical field.The fly ash with higher hydration activity can induce in-situ self-repairing of microstructure primary defect of cement stone.The microcrack is initiated in concrete under initial freeze-thaw, the fly ash is added in the application, hydration is triggered, the water-absorbing resin material is added to maintain the suitable humidity inside concrete, the generated hydration product seals the crack, so that the density of concrete is restored.The water-absorbing resin material can continuously absorb and release water in freeze-thaw cycle, and the process can be triggered cyclically, thereby realizing the autonomous repair of multiple freeze-thaw damage.The carboxymethyl cellulose is used to prepare water-absorbing resin in the application, and the carboxymethyl cellulose has good water absorption, which improves the water absorption performance of water-absorbing resin.Calcium carbonate is added in water-absorbing resin to form a crosslinked network, which improves the stability in concrete.

The invention discloses self-compacting concrete with synergistically optimized fluidity and volume stability, and belongs to the technical field of concrete materials, the self-compacting concrete is prepared from the following components by weight: 834-849 parts of coarse aggregate; 950 to 968 parts of artificial sand; 322 to 345 parts of ordinary Portland cement; 142 to 150 parts of water; 55 to 75 parts of modified hollow ceramic microbeads; 14 to 18 parts of an expanding agent; 5 to 9 parts of a super absorbent resin-montmorillonite composite material; and 5-11 parts of a water reducing agent. According to the self-compacting concrete disclosed by the embodiment of the invention, the contradiction between the fluidity and the volume stability can be fundamentally coordinated, and the shrinkage deformation is remarkably reduced while the excellent self-compacting performance is ensured, so that the self-compacting concrete is suitable for narrow space lining projects such as water delivery tunnels and the like which have extremely high requirements on structural integrity and long-term safety.

This utility model relates to the field of building construction technology and discloses a waterproof structure for building construction, including a wall with a waterproof structure inside and a fixing structure inside the waterproof structure. This utility model aligns the position of the sliding rod with the position of the sliding groove. The sliding rod is inserted into the sliding groove and rotated, causing the positioning bead to engage with the positioning hole, thus connecting the absorbent pad and the top cover. The absorbent pad is then inserted into the placement groove, and the top cover is rotated to thread it into the groove. A connecting pipe is then inserted into the mounting rod. If leakage occurs at the connection point, the absorbent pad's excellent absorbency absorbs the water seeping out, preventing mold and corrosion of the wall due to prolonged water exposure, thus improving the practicality of the device.

Disclosed are water absorbent resin particles that contain a crosslinked polymer that has, as a monomer unit, at least one kind of ethylenically unsaturated monomer selected from the group consisting of (meth)acrylic acid and a salt thereof. The water absorbent resin particles have a centrifuge retention capacity of 30 g / g or more and a gel flow angle of 10° or more and 35° or less.

The invention discloses a coagulator applied to rapid hardening of a soft foundation road section, and belongs to the technical field of soil hardening treatment.The coagulator applied to rapid hardening of the soft foundation road section comprises, by weight, 40%-50% of solid waste building materials, 10%-20% of activated carbon loaded silicon dioxide, 15%-25% of desulfurized gypsum, 0%-3% of a water reducing agent and the balance cement, the solid waste building material comprises coal gangue, fly ash and blast furnace slag. Activated carbon loaded silicon dioxide is used as a raw material, the gel reaction rate is increased by using the hydrophilic and water-absorbing properties of the activated carbon loaded silicon dioxide, a hydrated calcium silicate gel and ettringite dual-crosslinking system formed through material composite design is improved, and a thin and soft muddy medium is converted into a hardened body with enough bearing capacity within 15-20 minutes at normal temperature; the problems of rapid stability and safe passing in a special construction environment are solved, and the safe, environment-friendly and low-carbon purposes of harmless and resourceful treatment of harmful resources are achieved.

The invention discloses a building curtain wall material thermal insulation performance detection method, and relates to the technical field of building material detection, and the method comprises the following steps: S1, fixing the position of a building curtain wall material; s2, multi-point supporting force is provided for the building curtain wall material to detect the anti-fracture effect of the building curtain wall material; s3, a water spraying test is conducted on the building curtain wall material, and the water absorption of the building curtain wall material is detected; the external temperature of the building curtain wall material is detected through the first temperature sensor and the second temperature sensor, the heating piece and the refrigerating piece can simulate the external contact temperature of the building curtain wall material under different conditions, and the thermal insulation performance of the building curtain wall material is judged by observing the temperature ratio through the third temperature sensor and the fourth temperature sensor.

The application provides an environmental-friendly cement-based composite material of dredged material and a preparation method thereof, and belongs to the technical field of waste utilization. The environmental-friendly cement-based composite material of dredged material comprises 100-120 parts of dredged silt material, 20-40 parts of composite cementitious material and 0.1-3 parts of superabsorbent resin. The composite cementitious material comprises magnesium phosphate cement, fly ash and oil tea fruit shell ash in a mass ratio of (3-6):(2-4):(0.2-2). The superabsorbent resin is a polymerization crosslinking product of water-soluble ene acid monomers containing imidazole groups and phosphoric acid groups, ene amide sulfonic acid monomers, ene alkyl siloxane monomers and post-crosslinking agents. The environmental-friendly cement-based composite material of dredged material is prepared by using dredged material as a main raw material to preliminarily separate by-product coarse aggregate, and combining a double solidification strategy of superabsorbent resin and cementitious material. The mechanical strength of the cement-based composite material is increased, and the leaching risk of heavy metals and chlorine ions is effectively reduced. An effective solution is found for harmless and resource utilization of dredged material.

The embodiment of the application discloses a high-pressure underground tunnel grouting method. The method comprises the following steps: embedding a grouting pipe in a to-be-grouted hole; pouring quick-drying cement into an orifice section of the to-be-grouted hole through the grouting pipe; combining the quick-drying cement with the characteristics of quick lumping, the method can form a sealing layer at the orifice of the to-be-grouted hole under high pressure, thereby providing conditions for subsequent grouting; pouring mortar with expansibility and water absorption into a closed section of the to-be-grouted hole through the grouting pipe; the quick-drying cement has the advantage of quick lumping, but cracks will be generated in the drying shrinkage process; if direct chemical slurry filling is performed, the slurry will exude and other problems will occur; therefore, the closed section is additionally arranged below the orifice section, and the mortar with expansibility and water absorption is poured into the closed section; and the to-be-grouted slurry is poured into a grouting section of the to-be-grouted hole through the grouting pipe. The step should be performed after the hardness of the mortar in the closed section reaches a required threshold value, at which time the cement or mortar in the orifice section and the closed section ensures that the to-be-grouted slurry does not exude.

The present application provides a kind of shale physical model, saturated oil shale core sample preparation method and device, shale physical model includes sand, cementing agent and solid phase cementing material with water absorption, the shale physical model is that sand and solid phase cementing material are mixed uniformly and are pressed after being sprayed with water-diluted cementing agent;Saturated oil shale core sample preparation method includes: sand and solid phase cementing material with water absorption are mixed uniformly;Cementing agent is diluted with water;Solid phase raw material is sprayed with cementing agent solution and is mixed uniformly;To be pressed raw material is soaked in oil liquid and is pressed.The shale physical model of the present application is assisted with solid phase cementing material with water absorption, under the double action of cementing agent and solid phase cementing material, not only guarantee the cementing quality, and form the pore structure with shale characteristics, by pressing saturated oil shale core sample in oil phase environment, completely simulate the distribution of oil phase in pore in actual shale oil reservoir.

The utility model provides a tunnel cross-fault buffer layer system based on SAP aggregate concrete, which comprises a uniform-section beam and a hoisting system, the uniform-section beam is composed of a frame and a concrete main body, coarse aggregate is distributed in the concrete main body, and the coarse aggregate is spherical super absorbent resin with the particle size of 20-60mm; the frame comprises ribbed longitudinal steel bars and stirrups, and the ribbed longitudinal steel bars and the stirrups are fixedly connected to form the frame of the uniform-section beam; the uniform-section beams are installed between the primary lining and the secondary lining of the tunnel through the hoisting system, and a shock absorption and isolation buffer layer is formed. By means of the uniform-section beams and the hoisting system, the cross-fault tunnel expanding excavation section buffer layer is assembled and installed, the consistency and reliability of the shock absorption and isolation performance of the buffer layer are ensured, through the integrated installation scheme, the construction process is simplified, the construction difficulty is lowered, the construction period is greatly shortened, the construction cost is greatly reduced, and the construction efficiency is improved. And meanwhile, the safety and the shock resistance toughness of tunnel engineering are guaranteed.

The invention discloses a lightweight high-strength stone-like brick and a preparation method thereof. The lightweight high-strength stone-like brick comprises a porous matrix layer, a radiation refrigeration functional layer and a super-hydrophobic breathable layer, the porous matrix layer comprises cement, hollow microspheres, porous lightweight aggregate and water-absorbing fibers, and a moisture storage framework with light weight and high strength is realized; the radiation refrigeration functional layer comprises a radiation refrigeration filler and natural stone powder, and realizes high sunlight reflectivity, high infrared radiance and stone-like appearance; components of the super-hydrophobic breathable layer comprise a hydrophobic mesoporous material, so that surface super-hydrophobicity is realized, and water vapor is allowed to penetrate through the super-hydrophobic breathable layer; on the premise of guaranteeing the rain-proof, pollution-resistant and radiation refrigeration functions of a foundation, passive collaborative cooling is achieved through low-temperature water vapor adsorption, high-temperature evaporation heat dissipation, rapid conduction of internal heat to the surface through water vapor and then infrared radiation heat dissipation, and meanwhile the product has the advantages of being light, high in strength and durable and is suitable for green building outer walls.

The invention belongs to the technical field of modified copolymer nylon, and particularly relates to a modified PA6 material and a preparation method thereof. The invention aims to solve the problems that the existing copolymerization modified PA6 material has strong hygroscopicity and does not have high insulativity. Caprolactam and laurolactam are mixed and copolymerized to obtain a PA6 / 12 random copolymer; blending the modified graphene oxide, boron nitride nanosheets and polyamide oligomer in advance to obtain a composite suspension; the PA6 / 12 random copolymer is subjected to surface coating and then fed into an extruder, the composite suspension liquid is added after complete melting, a flame retardant additive is added after uniform mixing, and finally the modified PA6 material is obtained through extrusion. The modified PA6 material prepared by the invention has low water absorption and good insulativity, and is not easy to leak and trace in a high-temperature working scene.

This invention discloses a method for simultaneously improving the mechanical properties and moisture transport properties of high-volume fly ash mortar using chemical admixtures. The steps include: 1. Selecting multiple chemical admixtures, with their respective dosages as independent variables, and using response surface methodology to prepare multiple groups of high-volume fly ash mortar. 2. Testing their compressive strength, splitting tensile strength, first-stage water absorption coefficient, and second-stage water absorption coefficient after 28 days of curing, using these as dependent variables. 3. Establishing the mathematical relationship between the mechanical properties and moisture transport properties and influencing factors, predicting the optimal chemical admixture dosage, and preparing high-volume fly ash mortar based on this prediction. The accuracy of the match between the predicted and actual values ​​is then measured and verified. This invention addresses the difficulty of simultaneously improving the mechanical properties and moisture transport properties of high-volume fly ash mortar by applying experimental design and rationally using chemical admixtures to simultaneously improve both properties.

The utility model relates to the technical field of water absorbability detection, in particular to water absorbability detection equipment for a self-insulation building block, which comprises a heating cabinet body and a cabinet door, a weighing tray is mounted at the bottom in the heating cabinet body, and an electric heating wire is embedded in the side wall of the heating cabinet body; bricks to be detected are placed on the weighing tray, moisture on the bricks is heated and dried through the electric heating wire, then the bricks are immersed in water for a period of time, then the bricks are taken out, redundant moisture on the surfaces of the bricks is wiped away, and the bricks are placed on the weighing tray and heated and dried again. The water absorption rate of the brick is calculated according to the mass change of the brick measured by the weighing tray before and after the second drying, and the interference of the water content of the brick before being soaked in water can be reduced through a mode of firstly drying the brick and then soaking in water and weighing, so that the measurement is more accurate, and the water absorption performance of a product can be known more accurately.