293 results about "Flexural strength" patented technology

The invention provides a method for optimizing the mechanical property of a bio-based composite material based on nano modification, and belongs to the technical field of high-molecular compound compounds.The method includes the steps that wood flour is subjected to silane coupling agent modification pretreatment, a functionalized nano particle dispersion liquid is prepared, the dispersity is evaluated through a graph theory model, and the mechanical property of the bio-based composite material is optimized. The modified wood flour and polyethylene are subjected to melt blending in a twin-screw extruder in proportion, the functionalized nanoparticle dispersion liquid is synchronously added, real-time regulation and control are performed by using an intelligent dispersion optimization model, and the network structure integrity is evaluated through gridding performance indexes. The tensile strength, the bending strength and the impact strength are comprehensively optimized by adopting a multi-objective optimization game model, the process parameters such as the nano-particle addition amount, the mixing temperature and the mixing time are adjusted according to the optimization result, and the optimization is repeated until the preset target values are reached, so that the problems that the nano-particles are non-uniformly dispersed, local stress concentration points are formed, and the stability of the nano-particles is improved are solved. The overall mechanical property is influenced.

The invention discloses a special aggregate for high-strength UHPC (Ultra High Performance Concrete) as well as a preparation method and application thereof, and relates to the technical field of nano modification. According to the aggregate, high-strength basalt or quartz sand is used as a matrix, continuous graded particles are formed through a multi-stage crushing process, and the particle morphology and size distribution are optimized. The surface of the UHPC aggregate is modified by adopting a nano composite system, and the interface bonding performance of the aggregate and a UHPC matrix is remarkably improved by forming a gradient nano composite coating. And technological parameters are optimized, so that the uniformity and the performance stability of the coating are ensured. The aggregate can significantly improve the compressive strength, breaking strength and durability of UHPC. In the prefabricated bridge wet joint, the aggregate shows excellent construction performance and rapid maintenance characteristics, and can effectively shorten the construction period and prolong the service life of the structure. According to the invention, a high-performance special aggregate is provided for UHPC through a nano modification technology, and the development of ultra-high performance concrete in engineering application is promoted.

The invention belongs to the technical field of metal ceramic, and particularly relates to a high-toughness metal ceramic particle and a preparation method thereof.The particle is characterized in that ceramic micro powder, surface modified ceramic powder and rare earth element carbonitride form a composite hard phase, and the composite hard phase is dispersed in a metal matrix composed of multiple metal elements; and synergistic regulation and control components are introduced to optimize interface bonding and tissue uniformity. Particles are subjected to a step-by-step heat treatment and isostatic pressing forming process, and a stable structure is formed by controlling the oxygen content and the sintering atmosphere. The obtained material has high bending strength, high fracture toughness and good thermal shock resistance, is suitable for the application field of wear resistance and crack resistance under extreme working conditions, and has tissue compactness and mechanical stability.

The invention belongs to the technical field of low-carbon building materials, and particularly relates to a fly ash-slag-based alkali-activated cementing material as well as a preparation method, a strength regulation and control method and application thereof. The cementing material comprises, by mass, 64%-68% of powder, 21%-30% of a composite alkali activator and 5%-12% of additional water, and in the powder, slag powder accounts for 0-50% of the mass of the powder, and fly ash accounts for 50-100% of the mass of the powder. The initial setting time of the cementing material is larger than or equal to 60 minutes, the 28-day compressive strength is 30.0-100.0 MPa, the breaking strength is 4.0-7.0 MPa, the cementing material has good mechanical performance, meanwhile, the strength of the cementing material can be regulated and controlled through the powder mixing ratio, the regulation and control range is large, the cementing material is suitable for application scenes with different strength requirements, and the cementing material has wide application prospects in the field of civil engineering.

The invention relates to the field of testing devices, in particular to a bending strength testing device for a fitness equipment barbell rod. The invention aims to solve the technical problems that in the bending strength test of a barbell rod, the barbell rod needs to bear large bending force, if a clamp mechanism is unstable or the clamping force is insufficient, the barbell rod may slip or break in the test process, and potential safety hazards are caused to testers and equipment. Comprising a box body, a shell is fixedly connected to the upper surface of the box body, a spacing mechanism is arranged on the inner side of the box body, two clamp mechanisms are arranged on the upper side of the spacing mechanism, pressing mechanisms are arranged on the two sides of each clamp mechanism, a rotating mechanism is arranged on the side face of the clamp mechanism on the left side, and a detection mechanism is arranged between the two clamp mechanisms. By arranging the clamp mechanism, a clamping handle rotates, four clamping wheels move oppositely to clamp and fix a barbell rod, and a locking handle moves downwards to drive a locking pin and a limiting frame to lock the position of a locking plate.

The invention relates to a multi-component composite modified geopolymer material and a preparation method thereof, and aims to solve the problems of high brittleness, easiness in cracking and poor durability of a traditional geopolymer. According to the material, industrial solid wastes (carbonized steel slag, volcanic ash and the like) are used as main matrixes, a macroscopic anti-cracking framework is constructed through red copper fibers, micropores are nanofilled with CVD silicon oxide substrate graphene, and polyamide resin flexibly buffers stress, so that a cross-scale reinforcing system is formed. The preparation method adopts a solid phase premixing-liquid phase excitation-gradient compounding process, and functional components are doped in sections, so that the dispersity and constructability are guaranteed. The technical effects are obvious: the breaking strength is reached, the splitting tensile strength is obviously improved, the mass loss rate is obviously reduced after freezing and thawing for 100 times, and the shrinkage crack self-limit is within 50 [mu] m. The carbon emission of the material is greatly reduced, the high-durability standard is met, and the material is suitable for severe environmental engineering.

The invention relates to the field of textured low-temperature co-fired ceramic materials, in particular to a textured low-temperature co-fired ceramic material and a preparation method thereof. According to the invention, a part of Al2O3 powder is replaced by flaky alpha-Al2O3, and the flaky alpha-Al2O3 is directionally arranged in the green tape along the tape casting direction through tape casting, so that the arrangement mode can play a role in increasing crack deflection and bridging in the fracture process of the textured low-temperature co-fired ceramic material; the bending strength of the textured low-temperature co-fired ceramic material is improved, and therefore the technical problem that an existing textured low-temperature co-fired ceramic material is poor in mechanical property is solved.

The utility model discloses a light bending-resistant frame type vehicle frame which comprises a frame type vehicle frame body, and the two ends of the frame type vehicle frame body are connected with a front buffering vehicle frame and a rear buffering vehicle frame respectively. The frame type frame body comprises a plurality of cross beams. The bending-resistant components are arranged in the cavities inside the cross beams, so that the bending-resistant strength of the frame type frame main body can be ensured without increasing the number of the cross beams, the connecting longitudinal beams and the supporting vertical beams, the bending-resistant strength of the cross beams is also enhanced, and the characteristic of light weight is also ensured; meanwhile, the intervals of the anti-bending assemblies are gradually increased from the middle positions of the connecting longitudinal beams to the direction of the connecting longitudinal beams, lightweight arrangement is further considered on the basis that the bending strength of the cross beams is enhanced, and the bending strength of the supporting vertical beams is guaranteed by arranging longitudinal supporting strips in the supporting vertical beams; and meanwhile, through the arrangement of the multiple inclined supporting strips which are arranged in a staggered mode, the overall bending strength is further guaranteed on the basis of light weight.

The invention relates to the technical field of fireproof plates, and provides a fireproof plate with high corrosion resistance. The fireproof plate is prepared from the following raw material components in parts by weight: 60 parts of Portland cement, 8 to 12 parts of refractory fiber, 10 to 20 parts of pyrophyllite powder, 8 to 16 parts of functional aggregate, 5 to 8 parts of epoxy resin, 0.5 to 1.5 parts of curing agent, 12 to 16 parts of flame retardant and 20 parts of water, the functional aggregate comprises zirconite powder and calcium metaborate in a weight ratio of (1: 9)-(9: 1). By means of the technical scheme, the problem that in the related technology, a fireproof plate is poor in breaking strength is solved.

A titanium-based metal ceramic material with a six-element high-entropy alloy as a bonding phase is prepared by taking Ti-CN as a hard phase, the six-element high-entropy alloy as the bonding phase and Mo2C as a strengthening phase through mixing, ball milling, pretreatment, pre-press forming and high-temperature sintering in sequence, and according to the mass percent, the mass ratio of Ti-CN is 50-60%, the mass ratio of the six-element high-entropy alloy is 30-45%, and the mass ratio of Mo2C is 5-10%. According to the Ti-CN-based metal ceramic and the preparation method thereof, the ball-milled powder is pretreated through combination of electric field assistance and low-temperature pre-sintering, the overall performance of the metal ceramic obtained after SPS is effectively improved, the hardness of the prepared Ti-CN-based metal ceramic reaches HV1920, the fracture toughness reaches 15.9 MPa.m / , the bending strength reaches 2400 Mpa, the Ti-CN-based metal ceramic has excellent wear resistance and corrosion resistance, the wear rate is as low as 1.2 * 10 <-7 > mm < 3 > / N.m, and the service life of the Ti-CN-based metal ceramic is prolonged. The corrosion rate is as low as 0.0012 g / (m < 2 >. H).

The utility model relates to the technical field of detection tools, and discloses a building framework anti-bending detection device which comprises a base, a first portal frame, a second portal frame and a control panel fixedly mounted outside the first portal frame, and the first portal frame and the second portal frame are fixedly mounted on the upper surface of the base. A detection mechanism for detecting reinforcing steel bars is arranged in the first portal frame; the detection mechanism comprises first mounting frames which are symmetrically arranged, and a first pressing roller and a second pressing roller are rotationally mounted on the inner sides of the two first mounting frames correspondingly. According to the anti-bending detection device for the building framework, a steel bar penetrates through a first portal frame to start a clamping hydraulic cylinder to drive two driven rollers to move downwards to clamp and fix the steel bar, then a force application hydraulic cylinder is started, the bending displacement of the steel bar after being pressed is recorded through a pressure sensor to judge the bending resistance of the steel bar, and then the steel bar is displaced through a driving mechanism; different parts of the reinforcing steel bar are transported to the hydraulic cylinder for detection, so that the advantages of high practicability, convenience in detection and the like are achieved.

An efficient sound-absorbing lightweight aggregate cellular concrete, a method for preparing the same, and an application thereof. The concrete comprises: 85-95 parts by weight of low-carbon sulfur-aluminum-ferric cementitious materials, 5-15 parts by weight of supplementary cementitious material, 0.6-1.5 parts by weight of functional admixture, 20-60 parts by weight of non-sintered lightweight aggregate, 0.35-0.45 parts by weight of water, and 0.5-1.5 L of preformed foam. The non-sintered lightweight aggregate includes cementitious materials, byproduct gypsum, hydrogen peroxide, water, and expanded perlite. A multi-level pore structure is constructed from expanded perlite pores, hydrogen peroxide foaming pores, and physical foaming pores. The material exhibits a noise reduction coefficient ≥0.80, a bulk density≤500 kg / m3, and a flexural strength ≥1.5 MPa.

The invention discloses high-thermal-conductivity fiber toughened fluorescent ceramic as well as a preparation method and application thereof, and aims to solve the problems of brittle fracture and thermal quenching of traditional fluorescent ceramic. According to the method, a pre-strain programmable 4D printing technology is adopted, and aluminum nitride (AlN) short fibers and carboxymethyl cellulose are self-assembled to form a natural concentric cylinder microstructure, so that the toughness and the mechanical property of the ceramic are enhanced. The strain distribution of the rubber film in a tensile state is simulated through finite element analysis, and the stress direction and the deformation control of a key area are optimized. Pre-strain is applied to the rubber film, and a fluorescent ceramic biscuit is printed on the surface of the rubber film; after the stress is released, the ceramic body spontaneously deforms into a hollow hemispherical structure. A rubber substrate is removed through high-temperature sintering, and the fluorescent ceramic with high mechanical strength and high thermal conductivity is obtained. The bending strength of the fiber-toughened fluorescent ceramic reaches 500-600 MPa, and the fracture toughness is improved to 9-11 MPa.m / , so that the fiber-toughened fluorescent ceramic is obviously superior to the traditional fluorescent ceramic.

The invention provides ultra-thin glass and reinforced impact-resistant ultra-thin glass as well as a preparation method and application thereof, the composition of the ultra-thin glass is controlled, and the components of the ultra-thin glass are controlled to simultaneously meet the following relational expressions (1)-(3): (1) ((Li2O) + (K2O)) / ((Al2O3) + (Na2O)) is more than or equal to 11.00% and less than or equal to 20%; (2) 6% < = ((ZrO2) + (Li2O) + (MgO)) / ((Na2O) + (K2O) + (SiO2)) < = 14% (3) 4.1 < = ((B2O3) + (SiO2) + (ZrO2)) / ((K2O) + (Na2O)) < = 5.1. The ultra-thin glass provided by the invention keeps an ultra-high Young modulus under the condition that the thickness is not more than 0.40 mm, and has a relatively low thermal expansion coefficient; the reinforced impact-resistant ultrathin glass prepared by the preparation method has good impact resistance and falling resistance, and also has good bending strength and low warping performance.

The invention discloses a gray-scale-adjustable silicon nitride ceramic material and a preparation method thereof, the apparent density of the ceramic material is 3.0-3.6 g / cm < 3 >, the Vickers hardness is 1700-2000 HV, the bending strength is 700-1000 MPa, the fracture toughness is 6.5-10 MPa.m < 1 / 2 >, the crystal form of the ceramic material is a long columnar beta-Si3N4 crystal form, and the gray-scale-adjustable silicon nitride ceramic material comprises the following raw materials by weight percent: 85-98% of alpha-Si3N4, 5-10% of SiO2, 5-10% of SiO2, 5-10% of SiO2, 5-10% of SiO2, 5-10% of SiO2 and 5-10% of SiO2. 1-8 wt% of a sintering aid and 0-10 wt% of a coloring agent

The present invention provides an integrated ceramic tool with thermistor temperature measurement and cutting functions and a preparation method thereof, which comprises a thermosensitive layer and a ceramic matrix layer; the thermosensitive layer is formed by sintering a temperature measurement material and an additive; the ceramic matrix layer is formed by sintering a matrix material, a binder and a reinforcing phase. The preparation method is to make the powders of each layer of materials, lay and compact the powders of each layer of materials layer by layer in sequence, and finally carry out spark plasma sintering (SPS). The present invention further discloses the application of the tool. By selecting temperature-sensitive materials and designing the tool structure, the present invention enables the obtained ceramic tool to meet the requirements of tool performance in industrial production in terms of Vickers hardness, flexural strength and fracture toughness, and realizes the cutting function of the ceramic tool and the real-time measurement of the cutting temperature during the cutting process.

The invention belongs to the technical field of underground pipe network inspection wells, and particularly discloses a preparation process of an integral SMC (Sheet Molding Compound) glass fiber reinforced plastic inspection well, which comprises the following steps: (1) raw material preparation: the raw materials comprise the following components in parts by mass: 30-60 parts of a resin system, 22-30 parts of a reinforcing material, 10-30 parts of a filler and 0.5-3 parts of a release agent; (2) flaking: adding the raw materials into an extruder, and extruding into sheets; (3) plasticizing: placing the sheet in a transfer box for standing and plasticizing to obtain a sheet molding composite material; and (4) compression molding: coating a lower die of a die with the plastified sheet-shaped molding composite material, closing and pressing the die, and opening the die to take out a product after compression molding. Through process control, the overall SMC glass fiber reinforced plastic inspection well stable in performance can be prepared, the tensile strength can reach 60-100 MPa, the bending strength can reach 120-200 MPa, and the industrial application requirement is met.

The invention belongs to the technical field of building materials, and particularly relates to an engineering gelling composite material and a preparation method and application thereof. The machine-made sand is used as the core aggregate, and the compactness of the engineering gel composite material is improved due to the good grading controllability and micro powder filling effect of the machine-made sand. Through the synergistic effect of the machine-made sand and the mixed fibers, the cost of the engineering gelling composite material is reduced, meanwhile, the excellent mechanical property and durability of the engineering gelling composite material are kept, the balance of the mechanical property and the durability is achieved, and the sustainability is high. Specifically, by controlling the mixing ratio of the raw materials, the engineering gelling composite material is excellent in mechanical property, and has excellent fluidity, high ductility, bending toughness, breaking strength and compressive strength; the mixed fibers form a multi-stage crack resistance mechanism, and the crack resistance of the engineering gelling composite material is enhanced by combining the grain composition advantage of the machine-made sand.

The present invention discloses a method for preparing a C / C-SiC composite material by low-temperature reactive infiltration of a silicon-nickel alloy. The method comprises the following steps: uniformly pressing silicon powder and nickel powder into a mold by mechanical stirring and grinding; heating the pressed block to form a silicon-nickel alloy, and crushing the alloy block into alloy particles; laying a porous C / C composite material on top of the silicon-nickel alloy particles, and reactive infiltration in a vacuum furnace in a vacuum atmosphere or an Ar or N2 inert atmosphere to obtain a C / C-SiC composite material. The silicon-nickel alloy is used to address the limitations of the C / C-SiC composite material prepared by the pure silicon reactive infiltration process, such as low strength, high reactive infiltration temperature, and damage to fiber strength. The present invention has the advantages of significantly reducing the reactive infiltration process temperature, improving the uniformity of SiC phase distribution in the matrix, and improving the mechanical properties of the composite material, such as flexural strength and fracture toughness.

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 utility model belongs to the technical field of PE (polyethylene) production pipes, and particularly discloses a strength testing device for high-molecular PE pipe production, which comprises a device frame, a protractor is arranged at the top of the device frame, a pipe is detachably mounted on the device frame through a clamping mechanism, a fixing shaft is fixedly arranged on the inner side of the protractor in a penetrating manner, and the fixing shaft is connected with the protractor. The outer surface of the fixing shaft is rotationally connected with a bending frame, and the top of the bending frame is fixedly connected with a pressing handle. According to the strength testing device for polymer PE pipe production, a PE pipe can be kept relatively stable in the strength testing process through the clamping mechanism and the positioning mechanism, the pipe can be bent by shifting a pressing handle, in the bending strength testing process of a standard PE pipe, the abrasion resistance of the pipe can be tested through the abrasion resistance testing mechanism, and the strength of the PE pipe can be tested. The device is not limited to a single bending strength test any more, and the performance of the PE pipe can be evaluated more comprehensively, including the durability and the stability of the PE pipe in actual use.

The invention discloses a double-breakpoint bending experiment device in the technical field of anti-bending detection, which comprises pressing plate devices and a force application device, the pressing plate devices are used for clamping and protecting a flat plate test piece and ensuring the stability of the flat plate test piece, the force application device is a hydraulic machine and is used for hydraulically applying force to the test piece, and the device is provided with an upper pressing plate device and a lower pressing plate device. The pressing plate devices are fixedly installed on the force application device, the upper pressing plate device and the lower pressing plate device are each provided with two stress rods, the stress rods form four point positions, pressing force application can be conducted on a flat plate test piece in a staggered mode, and double-point-position reverse breaking is directly conducted on the flat plate test piece. The device is simple and convenient and convenient to operate, two results are obtained through one-time pressing, the cracking rate can be slowed down, a stable test curve is obtained, consumed time in the detection process is reduced by half, a buffering spring and an elastic cushion are additionally arranged, and the testing efficiency is improved. And two breaking points of the flat plate test piece can be ensured not to influence secondary stress mutually.

1. Name of the product in this design: Double-column tensile testing machine. 2. Purpose of this design: To test the physical properties of various products, such as tensile strength, compressive strength, and bending strength. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The present application belongs to the technical field of concrete, and discloses a method for evaluating the degradation grade of concrete aggregate caused by sulphate attack. The method comprises the following steps: first, preparing fine aggregate samples from the sulphur-containing aggregate to be evaluated; then, mixing the samples with cement and water to prepare mortar expansion rate test pieces and mortar flexural strength test pieces; next, testing the 84d expansion rate of the mortar expansion rate test pieces and the 84d flexural strength retention rate of the mortar flexural strength test pieces; finally, evaluating the grade according to the test results: if the 84d expansion rate is greater than 0.2%, the sulphate attack is determined to be strong; if the 84d expansion rate is less than or equal to 0.2% and the flexural strength retention rate is less than 80%, the sulphate attack is determined to be moderate; if the 84d expansion rate is less than or equal to 0.2% and the flexural strength retention rate is greater than or equal to 80%, the sulphate attack is determined to be weak. The present application solves the problem of the lack of a unified test method standard for sulphate attack on concrete aggregate, provides a complete test method, establishes an evaluation system for the damage grade of sulphate attack, and promotes the use of aggregate with excessive sulphur content.

The utility model belongs to the technical field of steel-plastic composite belt testing, and particularly relates to a strength testing device of a steel-plastic composite belt for an optical cable, which comprises a support table, and a control box is arranged above the support table; the testing mechanism comprises a testing table and a driving push rod, the testing table is fixed to the top of the supporting table, a supporting plate is fixed to the testing table, an air pressure rod is fixed to the supporting plate, an output shaft of the air pressure rod is fixedly connected with the testing plate, the testing plate is slidably connected with the testing table, and the driving push rod is arranged in the control box and fixed to a connector. The fixing mechanism comprises a connecting plate, a connecting shaft is fixed to the connecting plate, a rotating cylinder is rotationally connected to the interior of the connecting plate and is in threaded connection with a fixing rod, and the fixing rod is fixedly connected with the fixing plate; under the condition that the steel-plastic composite belt is not disassembled, detection in different modes is carried out, the tensile strength and the bending strength of the steel-plastic composite belt can be effectively tested, the steps of repeated disassembly and assembly can be reduced, and the detection efficiency of the test is improved.

The present invention addresses the problem of providing a joint structure which comprises a joint member suitable for a butterfly joint, and a building. The joint structure according to the present invention includes a first wood panel, a second wood panel, and a butterfly wedge-shaped joint member for joining the first wood panel and the second wood panel. The joint structure has an allowable yield strength of about 10 kN or more. In one embodiment, the ratio of the bending strength of the wood panels to the bending strength of the joint member in the joint structure is 1:2.2 to 1:3.6. In addition, the joint structure according to the present invention may further include a joint member comprising laminated wood in which a plurality of plate materials are laminated.

1. Name of the Design Product: Electronic Universal Testing Machine. 2. Use of the Design Product: Mainly used for tensile, compression, bending, shear, peeling, flexural strength, punch and puncture tests of new waterproof coiled materials, waterproof coatings, rubber materials, geotextiles, insulation boards, thermal insulation mortars, pipes or other materials, and can also be used for tensile property tests of small metal materials. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective view. 5. The bottom surface of the Design Product is a part that is not easily seen or not seen during use, and the bottom view is omitted.

The invention discloses a device and method for testing flexural strength and compressive strength of structural solid concrete.The testing device comprises a thrust rod, thrust teeth, a counter-force ring, a hollow jack and a cylindrical force sensor, one end of the thrust rod horizontally penetrates through the side wall of the counter-force ring, and the other end of the thrust rod penetrates through the hollow jack; the thrust teeth are fixed to the thrust rod and located in the counter-force ring. The device further comprises a barrel type force sensor which is arranged on the thrust rod in a sleeving mode and abuts against the outer side of the hollow jack so as to assist in measuring the strength of the concrete entity. According to the device and the method for testing the breaking strength and the compressive strength of the structural solid concrete, the structure is reasonable, the breaking strength and the compressive strength can be tested at one time, and the device and the method have the advantage of high testing efficiency; meanwhile, the test belongs to a micro-damage test, the damage to the concrete is very small in the test process, and the safe use of the solid structure is not influenced after the test surface is repaired.

The invention relates to an inorganic composition product which is formed by strengthening crystallized glass. The crystallized glass contains, as a main crystal phase, one or more substances selected from the group consisting of alpha-cristobalite and alpha-cristobalite solid solutions. The content of the SiO2 component is 50.0% to 75.0%, the content of the Li2O component is 3.0% to 10.0%, the content of the Al2O3 component is 5.0% to less than 15.0%, the content of the B2O3 component is more than 0% to 10.0% (inclusive), and the content of the P2O5 component is more than 0% to 10.0% (inclusive) in terms of mass% of oxides; the mass ratio of SiO2 / (B2O3 + Li2O) is from 3.0 to 10.0; the inorganic composition product has a compressive stress layer on the surface and has a four-point bending strength of 760 MPa or more.

The present application belongs to the technical field of gathering and storage tank repair, and particularly relates to a storage tank wall reinforcing method and a composite material liner for reinforcing a storage tank wall, comprising: selecting a composite material liner with optimal performance parameter values from N different structures of composite material liners according to performance parameters, and recording the selected composite material liner as a selected composite material liner; the performance parameters include tensile strength and bending strength; the structure of the composite material liner comprises, from inside to outside, k1 layers of square cloth, k2 layers of four-axis cloth and k3 layers of carbon fiber cloth; if the difference between the wall thickness of the storage tank wall after being reinforced by the selected composite material liner and the minimum thickness of the storage tank wall is greater than or equal to L1, and L1>0, then the selected composite material liner is determined to be suitable for the storage tank wall; and the selected composite material liner is used to reinforce the storage tank wall to which the selected composite material liner is suitable. Thus, the present application solves the problem of high repair cost of the storage tank wall in the prior art.