70results about How to "Meet durability requirements" patented technology

The invention relates to the technical field of building materials, in particular to high-strength recycled concrete and a preparation method and application thereof, and the high-strength recycled concrete is prepared from the following raw materials in parts by weight: 290 to 443 parts of cement; 20 to 70 parts of fly ash; 20 to 70 parts of slag; 20 to 70 parts of silica fume; 20 to 70 parts of metakaolin; 650 to 750 parts of fine aggregate; 550 to 600 parts of natural coarse aggregate; 450 to 510 parts of recycled coarse aggregate; 4.0 to 7.0 parts of a water reducing agent; and 140 to 160 parts of water. The high-strength recycled concrete is designed and prepared on the basis of the service environment and load-bearing requirements of a recycled concrete structure, and mineral admixtures comprise coal ash, slag, silica fume and metakaolin. According to the preparation method, a pre-wetting-double slurry wrapping method is adopted, the recycled aggregate is subjected to pre-wetting, slurry wrapping and repeated stirring treatment, the internal microstructure of the concrete is enhanced, and the mechanical property of the recycled concrete and the durability of the recycled concrete in a composite salt erosion environment are improved.

The invention discloses an air bag type sealing structure for a deformation joint of an open trench tunnel. A groove along the whole circle of the inner wall of the tunnel in the circumferential direction is formed in the position, with the deformation joint, of the inner wall of the tunnel; the deformation joint is filled with filling materials; the open end of the groove is provided with a baffle fixed to the inner wall of the tunnel, and an air bag type waterstop is arranged in the groove; and the air bag type waterstop is provided with an inflation valve penetrating out of the baffle. Because the back-loading type waterstop is adopted, the air bag type sealing structure is not limited by the conditions on a construction site, high-standard protection on the site is not needed, and meanwhile, the air bag type sealing structure for the deformation joint is also applicable to fault rectification of an existing tunnel; the air bag type waterstop can be replaced without influencing the use functions, and the request for durability is met; and a uniform air pressure monitoring system and an automatic inflation system can be built to form an intelligent waterproof system with an automatic maintenance function.

The invention relates to a frame-core tube structure with a flexible inhaul cable. The frame-core tube structure with the flexible inhaul cable comprises a core tube, frame pillars, a horizontal steel girder and a combination floor slab. The frame pillars are evenly arranged on the outer side of the core tube. After the horizontal steel girder is combined with the combination floor slab, the horizontal steel girder and the combination floor slab are arranged in an overall structure in the vertical direction in a layering mode. The frame-core tube structure with the flexible inhaul cable is characterized by further comprising multiple slant pillars and multiple flexible stay cables. The slant pillars are connected to the core tube and the flexible stay cables are connected to cross points between the core tube and the frame pillars or between the horizontal steel girder and the frame pillars. The slant pillars, the stay cables, the horizontal steel girder, the frame pillars and the core tube commonly form a stable structure system. Compared with the prior art, the frame-core tube structure with the flexible inhaul cable has the advantages that transmission of vertical loads and resistance to side direction loads can be transmitted harmonically, the building appearance requirement can be met, the design concept is achieved.

The invention discloses micro-expanded ultrahigh-performance concrete and a preparation method. The concrete is prepared from the following ingredients in parts by weight: 100 parts of Portland cement, 10 to 55 parts of mineral additives, 20 to 60 parts of silicon ash, 10 to 35 parts of volume stabilizers, 150 to 250 parts of quartz sand, 15 to 40 parts of steel fiber, 2.0 to 5.0 parts of high dispersion and low viscosity type water reducers and 30 to 45 parts of water. The micro-expanded ultrahigh-performance concrete replaces a negative bending moment region conventional mechanical tensioning prestress structure to form a non-prestress simple support rotation continuous system; the self-bearing force, interface bonding, micro-expanded expansion performance and durability requirements canbe met; the construction efficiency of the non-prestress simple support rotation continuous system bridge is effectively improved. The concrete has the ultrahigh pressure-resistant and tension-resistant intensity, ultrahigh durability, micro expansion performance, steam curing avoidance, bonding performance and reasonable economic performance; meanwhile, good construction performance is realized.

The invention relates to a comprehensive protective system for an open-cut subway station under strongly corrosive environment and a construction method for the comprehensive protective system. Under the strongly corrosive environment, concrete durability requirements cannot be met according to existing specifications. The comprehensive protective system is characterized in that a complete outsourcing reinforced waterproof layer is arranged outside a top plate, a bottom plate and a side wall of the station; upper portion of the reinforced waterproof layer of the top plate is compacted by an overburden layer; a plain concrete cushion layer is arranged below the reinforced waterproof layer of the bottom plate; and the outer side of the reinforced waterproof layer of the side wall and a station main body foundation pit supporting structure at the outer side of the side wall are compacted by an isolating layer. On the basis of a common waterproof system of the open-cut subway station, an anticorrosion layer and an isolating layer are additionally arranged, and high-performance concrete and the like are adopted, so that concrete durability requirements are met, and therefore, the comprehensive protective system has wide application space in part of coastal and inland salty soil regions of China. On the basis of the waterproof system of the open-cut subway station, the comprehensive protective system has the characteristics of simple, convenient and flexible construction processes, strong operability, less increased investment, strong adaption, safety, reliability and the like.

The invention relates to the technical field of drilling rig derrick detection, and especially relates to a drilling rig derrick state online detection system. The system comprises a wind speed and direction detection device, a tilt angle detection device, a static force detection device, a data exchanger, a processor and a client side. The wind speed and direction detection device, the tilt angle detection device and the data exchanger transmit real-time data to the processor, the processor performs storage, analysis and other operation on the real-time data, and the client side calls the data from the processor to perform corresponding operation. The invention further discloses a drilling rig derrick state online detection method. The invention established the drilling rig derrick state full-life-cycle online monitoring system and method integrating structure monitoring, remote transmission and remote diagnosis into one body.

The invention discloses a structure with a prefabricated composite insulation board mounted by anchor bolts, relates to a structure with a prefabricated composite insulation board mounted by anchor bolts in a building, and aims at the problems that steel anchor bolts of a current prefabricated composite insulation board mounted by the anchor bolts are easy to corrode while passing through an insulating layer made of non-alkaline material and thus increasing in heat transfer and the steel is poor in fire resistance. The structure comprises that, the prefabricated composite insulation board and a building major structure are fixed together by the anchor bolts, fire-proof materials are arranged within a protective layer within a certain range of the outer ends of anchor bolts and/or within a certain range of the surfaces of the anchor bolts, and thus the structure with the prefabricated composite insulation board mounted by the anchor bolts is formed. The anchor bolts for mounting the prefabricated composite insulation board is good in fireproof performance and durability.

The invention belongs to the technical field of marine engineering high performance, and particularly relates to a high-density frozen-penetration-resistant marine concrete and a preparation method thereof. The high-density frozen-penetration-resistant marine concrete is composed of cement, a mineral admixture, sand, pebble, an additive, graphene oxide and water, and specifically, 270-280kg/m<3> of cement, 180-190kg/m<3> of the mineral admixture, 685-711kg/m<3> of sand, 1074-1119kg/m<3> of pebble, 9-9.4kg/m<3> of the additive, 0.135-0.141kg/m<3> of graphene oxide and 157-164 kg/m<3> of water.According to the invention, the binding capacity of calcined metakaolin and chloride ions is utilized; the influence of calcined metakaolin on the workability of a cement-based material is reduced through silica fume, so that a gelling system achieves the tightest stacking effect, meanwhile, the density of the gelling system is further improved by utilizing graphene oxide, and then the workabilityand the anti-freezing effect of concrete are improved by regulating and controlling the additive and the sand rate.

A method for reinforcing a rectangular wood column by pasting angle steel comprises the steps of wood column processing, angle steel pasting and steel batten plate welding. The angle steel is pasted to the angle portion of the wood column, a steel batten plate is welded in the height direction, the bearing force and the ductility of the wood column can be effectively improved, and meanwhile the requirements for reinforcing and repairing for corrosion resisting and durability are met.

The invention discloses a special-shaped shield segment structure penetrating through loess ground cracks and a construction method thereof. The special-shaped shield segment structure comprises a plurality of ring segments which are sequentially spliced along the axis of a tunnel; each ring segment is sequentially spliced into a ring by adopting splicing segments, and comprises a top sealing block, a plurality of adjacent blocks and a plurality of standard blocks; the plurality of standard blocks are sequentially spliced to form a lower half ring structure, the top sealing block is located at the top of the ring segment, and the two sides of the top sealing block are spliced and fixed with the lower half ring structure through the adjacent blocks; and the top sealing block and the standard blocks are wedge-shaped arc-shaped blocks, the adjacent blocks are parallelogram arc-shaped blocks, and the joints between the adjacent splicing segments are orthogonal to the loess ground cracks. The splicing segments are in a wedge-shaped arc-shaped block and parallelogram arc-shaped block combination form, and the joints between the adjacent splicing segments are kept orthogonal to the loess ground cracks, so that the damage to the tunnel structure when the ground cracks are vertically dislocated is effectively reduced, the safety of the tunnel structure is ensured, and the special-shaped shield segment structure has relatively high adaptability to the area penetrating through the ground cracks.

The invention discloses concrete for high-durability construction. The concrete is prepared from the following raw materials in parts by mass: 155-400 parts of cement, 110-60 parts of limestone powder, 20-80 parts of mineral powder, 780-735 parts of water sand, 1160-1150 parts of pebbles or 0 part of pebbles, 1010-980 parts of gravels or 0 part of gravels, and 160-155 parts of water. The specificsurface area of the limestone powder is 550-650m<2>/kg. According to the invention, the limestone powder with a certain specific surface area is adopted to improve the durability of the concrete, so that the frost resistance and chloride ion permeability resistance of the concrete are well improved, and the concrete with high durability is further formed.

The invention relates to a colorful high-strength anti-skid waterproof building material used for a bridge and/or a speedway and a preparation method of the colorful high-strength anti-skid waterproofbuilding material. The building material comprises the following raw materials in parts by weight: 5-20 parts of epoxy resin, 5-30 parts of metakaolin, 10-30 parts of quartz sand, 5-30 parts of diatomite, 1-3 parts of an emulsifying agent, 10-15 parts of titanium dioxide, 5-20 parts of aluminous soil, 5-10 parts of fluff pulp, 0.5-10 parts of water glass, 1-10 parts of magnesium oxide, 1-3 partsof sodium lignin sulfonate, 30-80 parts of white cement, 0.5-2 parts of molecular sieves, 1-5 parts of boric acid and 50-100 parts of water. The building material has the waterproof, anti-skid, abrasion-proof and corrosion-resistant functions, is environmentally friendly and does not contain a volatile solvent; in addition, the building material is excellent in durability, long in service life, stable at high temperature and anti-crack at low temperature and can resist the erosion of various natural conditions, so that the using quality of a road surface is improved; the building material cannot only be used as a waterproof material of a bridge deck, but also be used for a colorful anti-skid road surface.

The invention discloses a meridian aircraft tire capable of reducing interface stress, strain and themogenesis and improving bead durability. The tire is characterized in that two layers of stress buffer rubbers with different rigidities and thicknesses are arranged at a bead part between the outer side of a carcass ply and sidewall rubbers. The improved meridian aircraft tire can reduce interface stress, strain and themogenesis between the carcass at the bead part and the rubbers at the outer side, and can improve the bead durability under the rigorous conditions; According to tests, the bead durability is improved by more than 80%; and the dynamic performance of the tire can meet the requirements of airworthiness standard (GJB683A).

The invention discloses a slurry mineral admixture suitable for special-shaped component concrete, and a preparation method thereof, and relates to the field of building materials. 150-180 parts of steel slag, 160-200 parts of slag, 150-180 parts of water and 5-9 parts of a functional additive are put into a mill with the ball ratio of 10-20 parts of powder with the particle size of 0.6-1.0 mm, 80-120 parts of powder with the particle size of 1.0-1.7 mm and 140-160 parts of powder with the particle size of 1.7-2.5 mm, and are ground for 40-60 min to obtain the slurry mineral admixture. When being applied to a component concrete material, the slurry mineral admixture has high working performance, effectively reduces the defects of holes, pitted surfaces and the like, has the 1 d compressivestrength of 20 MPa or above, meets the mold stripping strength requirement, has the 28 d compressive strength meeting the C40 concrete requirement, and can meet the performance requirements of special-shaped members. According to the technical scheme, green development of building materials can be promoted, meanwhile, progress of the fabricated building technology is promoted, and remarkable social and environmental significance is achieved.

The invention discloses an automobile ABS mounting bracket which comprises an ABS executing mechanism positioning surface, a bracket mounting surface and an ABS executing mechanism mounting surface, wherein the positioning surface is provided with a positioning hole, and the bracket mounting surface is provided with a mounting hole; a longitudinal beam mounting surface of the bracket is connectedat the left side and the right side of the ABS executing mechanism positioning surface and extends downwards in an L shape, and then extends outwards to form the shape of L and forms a similar n-shaped structure with the ABS executing mechanism positioning surface; the ABS executing mechanism mounting surface is respectively connected with two edges of the right side of the ABS executing mechanism positioning surface in a vertically upward manner; and the upper end of the ABS executing mechanism mounting surface is respectively provided with mounting grooves with upward openings. In the priorart, the ABS executing mechanism positioning surface, the ABS executing mechanism mounting surface and the longitudinal beam mounting surface of the ABS bracket extend upwards around the front, back and right sides of an ABS executing mechanism supporting surface to form a structure with three closed surfaces, and compared with the structure, the automobile ABS mounting bracket has simple structure and convenient installation.

The invention discloses a prefabricated laminated parapet wall connection structure. The prefabricated laminated parapet wall connection structure is used for connection of a parapet wall, an externally-hung wall panel, a laminated beam and a laminated floor. The parapet wall comprises a parapet wall prefabricated portion and a cast-in-place fan kan located on the inner side of the parapet wall prefabricated portion, the bottom end of the parapet wall prefabricated portion is connected to the top end of the externally-hung wall panel through a groove, and the cast-in-place fan kan is subjectedto integrated cast-in-place forming with a cast-in-place portion of the laminated beam and a cast-in-place layer of the laminated floor. The prefabricated laminated parapet wall connection structureenhances the application of parapet wall joints in a fabricated building, improves the waterproof effect of the parapet wall, strengthens the connection strength between the parapet wall and a roof structural layer, improves the safety and integrity of the parapet wall, and can better meet the safety and durability requirements of the fabricated building.

The invention discloses an uneven settlement reinforcing leveling repairing method for existing building floors, and belongs to the technical field of civil engineering construction. The uneven settlement reinforcing leveling repairing method for the existing building floors comprises the following steps that grouting is carried out to form a composite foundation reinforcing platform, specifically, grouting is carried out at the bottom of the floor to form the composite foundation reinforcing platform so as to raise and level the floor; grouting is carried out to form a plurality of composite pile foundations, specifically, grouting is carried out at the bottom of the composite foundation reinforcing platform to form the composite pile foundations so as to support the composite foundation reinforcing platform and the upper load. The uneven settlement reinforcing leveling repairing method for the existing building floors has the characteristics of capability of improving foundation bearing capacity and improving overall foundation stability and durability, lifting and leveling repairing, no interference, economy and short construction period.

The invention discloses a processing method for imitation stone for capital construction and the imitation stone for capital construction, wherein the processing method for the imitation stone for capital construction comprises the steps: step 1, separating and screening construction waste to obtain aggregate; step 2, mixing the aggregate, a cementing material and gravel through water to form a stone-like concrete material; step 3, adding the stone-like concrete material into a mold, and carrying out compression to form a blank piece; step 4, carrying out water retention and maintenance treatment on the blank; step 5, carrying out surface processing treatment on the blank subjected to the water retention and maintenance treatment; and step 6, carrying out spraying maintenance treatment onthe blank subjected to surface processing treatment so as to obtain the imitation stone for capital construction. The appearance of the imitation stone for capital construction is closer to that of real stone so as to improve attractiveness, meanwhile, the comprehensive strength performance of the imitation stone for capital construction is improved so as to improve durability and use reliability,and the purpose of environment-friendly production of the imitation stone for capital construction is achieved.

The invention relates to a concrete additive and a preparation method and application thereof. Raw materials of the concrete additive includes one or more of a water-reducing component, an expansion component, a retarding component, an early strength component, an air entraining component, an antifreeze component and a waterproof component, wherein the water-reducing component is used for reducingthe water consumption of a mixture, the expansion component is used for making concrete expand slightly, and the retarding component is used for delaying a hydration reaction of binding materials; the early strength component is used for accelerating the early strength of the concrete, the air entraining component is used for improving the freezing resistance and/or durability of the concrete, and the antifreeze component is used for improving the freezing resistance of the concrete; and the waterproof component is used for reducing the water permeability of the concrete. After the additive is applied to the concrete, the mechanical properties of the concrete can be improved significantly, and the dosage is reduced significantly; and the additive is suitable for preparation of concrete for high-speed rails, subways, highways, offshore, ports and other high-performance concrete, and is suitable for preparation of high-fluidity self-compacting concrete and other concrete.

The invention discloses railway traffic cross-sea segment concrete, of which the strength is C55P12, electric flux 56-day age (C) is less than 1000 and chloride ion diffusion coefficient 90-day age is not more than 2*10<-12> m<2>/s; alkali content is controlled to be not more than 2.1 kg/m<3>, the content of SO3 in the concrete is less than 4% of a cementing material, the content of chloride ions in unit volume of the concrete is less than 0.1%, water-binder ratio of the concrete is 0.32 and the addition quantity of an admixture is 45%. The concrete particularly includes the following raw materials: 142-143 kg/m<3> of water, 247-249 kg/m<3> of cement, 90-115 kg/m<3> of fly ash, 90-115 kg/m<3> of ore slag powder, 1160-1163 kg/m<3> of impact-crushed stone, 645-655 kg/m<3> of river sand, and 4.5-4.9 kg/m<3> of a polycarboxylate water reducer. A pipe segment produced from the railway traffic cross-sea segment concrete can adapt a serious corrosive environment in a cross-sea zone, and can reach durability demand of 100 years.