33results about How to "Shear strength" patented technology

Metal carbide supported polycrystalline diamond (PCD) compacts having improved abrasion/impact resistance properties and a method for making the same under high temperature/high pressure (HT/HP) processing conditions. The PCD compact is characterized as having a mixture of submicron sized diamond particles and large sized diamond particles.

The invention belongs to the technical field of application of polymer mortar and particularly relates to a preparation method of epoxy mortar for filling an ocean oil and gas pipeline. The epoxymortar consists of a component A, a component B and a component C, wherein the component A is prepared by defoaming after blending epoxy resin, a reactive diluent, a plasticizer, an accelerator and pigments according to the proper proportion and; the component B is a special underwater T31-3 type curing agent; the component C is aggregate formed by mixing cement with quartz sand according to a certain proportion. When the epoxymortar is used for construction, the component A is heated to 30-50DEG C and stirred to homogeneousphase, and then the component A and the component B are mixed according to certain proportion and uniformly stirred; the component C is subsequently added into the mixture for uniformly blending to obtain an epoxymortar mixture for filling the ocean oil and gas pipeline. The mortar mixture is simple in preparation process; the prepared mixture has the advantages of high curing speed and strong cohesiveness as well as excellent compress and shock resistance and seawater corrosion resistance. The mortar mixture can be used for filling and strengthening an anode protection anticorrosive structure of the ocean oil and gas pipelines.

The invention discloses an epoxy mortar used for repairing sea oil gas pipeline and a preparation method thereof, which belongs to the technical field of polymer mortar application. The epoxy mortar is composed of a component A, a component B and a component C, the component A is prepared by bisphenol A epoxy resin E44, E51 and a certain amount of auxiliary agent, the component B is prepared by mixing a T31-3 type modified phenolic amine curing agent and a NP440 amidoamines curing agent according to a certain proportion, and the component C is an aggregate by mixing cement and quartz sand according to a certain proportion. The preparation method comprises the following steps: heating the component A to the temperature of 30-50 DEG C, stirring to homogeneous phase, then mixing the component A and the component B according to a certain proportion, uniformly mixing, adding the component C according to a certain proportion, and uniformly blending to obtain the epoxy mortar. The preparation method has simple technology, the epoxy mortar has strong cohesiveness, the epoxy mortar through solidification has excellent anti-compression, anti-punching and anti-seawater corrosion performances, and the epoxy mortar can be used for repairing and reinforcing a concrete coating on the sea oil gas pipeline and a thin layer of an underwater concrete structure.

A detachable crawler (1, 20) capable of increasing the durability thereof on a rubber belt part (4) body side, wherein each of a metal core (6) and a track shoe (21) of a detachable pad (5) is formed so that tightening force in a specific range (approx. 4.90 to 78.5 MPa per unit area) can be applied to a rubber elastic body (4a) including a tensile reinforcing layer (2) sandwiched between a core bar (3) in the rubber belt part (4) and the metal core (6) or steel track shoe (21) of the detachable paid (5).

The present invention relates to the field of building, bridge and harbor engineering, and provides a pre-stress FRP bush-FRP rib sea sand seawater expansion concrete combination column, which comprises an external FRP bush and internal FRP rib sea sand seawater expansion concrete, wherein the FRP bush wraps the sea sand seawater expansion concrete, self-stress is generated in the FRP bush and the concrete through the expansion of the concrete and the restriction of the FRP, uniformly distributed FRP longitudinal ribs are arranged on the periphery close to the sea sand seawater expansion concrete combination column, and penetrate through the sea sand seawater expansion concrete from top to bottom, and FRP spiral stirrups are bound around the FRP longitudinal ribs from the outer side along a top-to-bottom direction of the combination column according to the same interval and the same spiral angle. According to the present invention, the pre-tensile stress is generated in the FRP bush through the micro-expansion of the expanded concrete so as to effectively improve the axial limit bearing force of the combination column; and the river sand is replaced by the sea sand, the fresh water is replaced by the seawater, and the steel bar is replaced by the FRP rib, such that the performance of the combination column is improved, the limitation of the application of the sea sand seawater in the practical engineering is broken through, and the positive effect is provided in the protection of the ecological environment.

The invention provides a polymer-reinforced prestressed concrete cylinder pipe molding technology, and belongs to the technical field of pipeline manufacturing. The polymer-reinforced prestressed concrete cylinder pipe molding technology comprises the following steps that (1) manufacturing of a lining mold is conducted, wherein circumferential prestressed wires are wound around a concrete pipe core with a steel cylinder, a PCCP semi-finished product is formed and directly serves as the lining mold, and a reinforcing net is prefabricated in the concrete pipe core; (2) pretreatment of an outer mold is conducted, wherein a release agent coats the inner wall of the outer mold; and (3) construction of a pouring structure is conducted, wherein the lining mold, the reinforcing net and the outer mold are combined in sequence from inside to outside so as to form the pouring structure, polymer concrete is poured into the pouring structure, the outer mold is removed after molding is accomplished,and therefore a polymer-reinforced prestressed concrete cylinder pipeline is obtained. The polymer-reinforced prestressed concrete cylinder pipe molding technology is simple, and the manufactured polymer-reinforced prestressed concrete cylinder pipeline is excellent in performance and has the advantages of being high in sealing performance, strength and anti-permeability and resistant to corrosion.

The invention provides a damaged concrete pavement panel reinforcing structure and method. The structure comprises a concrete pavement panel, the concrete pavement panel is provided with a reinforcing groove, a plurality of pairs of horizontal steel bar embedding holes are formed in the two walls of the reinforcing groove, and horizontal steel bars are fixedly arranged in the horizontal steel bar embedding holes; a steel fiber reinforced concrete blanket is fixedly poured over the concrete pavement panel. The method comprises the steps of 1, conducting surface debristling; 2, making the reinforcing groove and drilling the plurality of pairs of horizontal steel bar embedding holes; 3, embedding the horizontal steel bars; 4, pouring steel fiber reinforced concrete to form the steel fiber reinforced concrete blanket. By combining the horizontal steel bars with steel fiber reinforced concrete, new cement concrete and old cement concrete cooperation work performance is improved, the bearing capacity of the concrete pavement panel reinforcing area is improved, and the service life and maintenance cycle of a road are prolonged.

The invention discloses a high-viscosity modified asphalt mixture and application thereof. The high-viscosity modified asphalt mixture comprises the following components in parts by weight: 25-35 parts of a first aggregate; 20 to 30 parts of a second aggregate; 35 to 55 parts of a third aggregate; 0-3 parts of a filler; 9-15 parts of high-viscosity and high-elasticity modified emulsified asphalt;0 to 0.3 part of glass fiber and 0-3 parts of an additive; the application of the high-viscosity modified asphalt mixture is as follows: the high-viscosity modified asphalt mixture is paved and then automatically flows to form a pavement overlay, and the high-viscosity modified asphalt mixture is a thin slurry mixture, is good in fluidity, and can intrude into asphalt pavement cracks, so that asphalt pavement cracks are repaired, and new cracks on an asphalt pavement can be effectively inhibited.

The invention discloses a connecting method and structure of a socket and embedded steel bar combined prefabricated hollow pier-bearing platform. The structure comprises a prefabricated hollow pier column, a prefabricated bearing platform, core filling concrete and a high-performance grouting material; the prefabricated hollow pier column is composed of pier column longitudinal bars, pier column stirrups, small U-shaped bars and large U-shaped bars, and the outer surface of the pier column at the connecting position of the bottom and a socket groove is in a corrugated shape; the prefabricated bearing platform is composed of connecting steel bars, bearing platform stirrups, the socket groove and a steel bar net; the surface of the inner wall of the socket groove is corrugated; and the connecting steel bars are common steel bars, and anchor heads are arranged at the ends. In order to guarantee the connecting strength of the prefabricated hollow pier column and the bearing platform, the structural integrity of the pier column and the bearing platform is enhanced through a socket and spigot joint mode and a pre-embedded connecting steel bar combined connection method. By prefabricating important components such as the bridge pier column and the bearing platform, rapid construction is achieved, the construction quality is guaranteed, meanwhile, the construction progress is accelerated, the socket depth is reduced, the good stress performance of the overall structure is guaranteed, and the requirement for the anti-seismic performance of a bridge is met.

The invention provides a reinforcing structure and method for a damaged concrete pavement panel. The reinforcing structure for the damaged concrete pavement panel comprises the concrete pavement panel with the planed surface, a reinforcing groove, multiple pairs of horizontal rebar embedding holes, and vertical rebar embedding holes. The horizontal rib embedding holes are formed in the two groove walls of the reinforcing groove, and the vertical rib embedding holes are formed in the concrete pavement panel. Horizontal rebars are fixedly arranged in the horizontal rebar embedding holes, vertical rebars are fixedly arranged in the vertical rebar embedding holes, and a steel fiber reinforced concrete cover is poured and fixed to the concrete pavement panel. The reinforcing method for the damaged concrete pavement panel includes the following steps that 1, surface planing is conducted; 2, the reinforcing groove is formed, and the multiple pairs of horizontal rebar embedding holes and the multiple pairs of vertical rebar embedding holes are drilled; 3, construction glue is poured, and the horizontal rebars and the vertical rebars are embedded; 4, steel fiber reinforced concrete is poured to form the steel fiber reinforced concrete cover. The bearing capacity of the concrete pavement panel is increased, the service life and the maintenance period of a road are prolonged, and the long-term use cost is reduced.

The invention provides a restoration structure and method for a damaged concrete pavement panel. The restoration structure for the damaged concrete pavement panel comprises the concrete pavement panel with the planed surface, multiple pairs of rebar embedding holes, rebars and a steel fiber reinforced concrete cover. The rebar embedding holes are formed in the two sides of a broken slab crack in pairs and distributed in the extension direction of the broken slab crack. The rebars are vertically inserted and fixed into the rebar embedding holes in a binding mode. The steel fiber concrete cover is poured and fixed to the concrete pavement panel. The restoration method for the damaged concrete pavement panel includes the steps that 1, planing is conducted; 2, the multiple pairs of rebar embedding holes are drilled; 3, construction glue is poured into the rebar embedding holes, and the rebars are vertically embedded; 4, steel fiber reinforced concrete is poured to form the steel fiber reinforced concrete cover, and finally the restoration structure for the damaged concrete pavement panel is formed. According to the restoration structure and method for the damaged concrete pavement panel, the service life and the maintenance period of a road are prolonged, and meanwhile the long-term use cost is reduced.

The invention discloses an integrated flower pool type ecological soil blocking building block and an assembly type soil blocking wall, and relates to the technical field of building materials. The soil blocking building block comprises an integrated block body, the integrated block body comprises a first top surface, a first bottom surface, a front side surface, a rear side surface, a left side surface and a right side surface, and the front side surface of the integrated type block body is a first arc-shaped convex surface; the rear side surface of the integrated type block body is a first arc-shaped concave surface; the left side surface and the right side surface of the integrated type block body are correspondingly provided with symmetrically arranged wave surfaces, the front sectionsof the wave surfaces are concave sections, and the rear sections of the wave surfaces are protruding sections; the first arc-shaped convex surface can be matched with the first arc-shaped concave surface and can also be matched with the concave sections; the protruding section can be matched with the first arc-shaped concave surface and can also be matched with the concave sections; and at leastone first through hole penetrating through the first top surface and the first bottom surface is formed in the integrated type block body.

The invention discloses an A COCS combine bridge deck structure which comprises an asphalt abrasion layer, a UHPFRC layer, a Waterproof layer, CLT top board, a corrugated sheet steel board and a diaphragm board, all of which are orderly arrayed from the top to the bottom. The UHPFRC layer is provided with a ribbed reinforcing steel mesh, the asphalt abrasion layer is laid on the surface of the UHPFRC layer, the waterproof layer is laid on the surface of the CLT top plate, and the UHPFRC layer is connected with the CLT top plate through a shear connector. A CLT top board, the c corrugated sheet steel board and the UHPFRC layer are combined organically, A PZ-type shear connector and a screw connector are used to effectively combine that parts, The advantages of each material are further brought into play to avoid the welding connection of the traditional structure, to overcome the problem of stress concentration at the vulnerable position caused by the number and collection of the structural weld seams, to improve the fatigue resistance of the orthotropic plate, to improve the integrity of the assembled building, to facilitate the manufacture and installation, to be simple in maintenance and to be low in production cost.

The invention discloses a production process for casting a core mold part based on a lost foam technology. The production process comprises the following steps of A, preparing a core mold model; b, preparing a core model cluster; c, pretreatment of model casting, specifically, burying the core model cluster into a sand box, compacting molding sand in the sand box, covering the molding sand with a plastic film, and performing primary vacuumizing treatment on the sand box to enable the interior of the sand box to be in a negative pressure state; d, casting; and e, post-treatment of model casting, specifically, uncovering the plastic film on the sand box, carrying out secondary vacuumizing on the interior of the sand box, taking out a fully cooled core mold casting from the sand box, and carrying out size and shape finish machining treatment to obtain the core mold part. The core mold part manufactured through the production process has the advantages of being high in size precision and low in surface roughness, the production process is simple, the production cost is greatly reduced, material consumption is low, and production process has high popularization value in the field of core mold part casting.

The invention discloses a fiber sheet-steel plate combination reinforced RC structure and a method and application thereof. A fiber sheet-steel plate combined plate is of a three-layer structure, the inner layer in contact with concrete is a low-elasticity-modulus high-strength glass fiber sheet or an aramid fiber sheet or a basalt fiber sheet, the middle layer is a steel plate, and the outer layer is an intermediate-elasticity-modulus or high-elasticity-modulus carbon fiber sheet. A method for preparing and reinforcing an RC structure of the combined plate comprises the steps that the fiber sheet and the steel plate as well as the fiber sheet and the concrete are bonded through epoxy resin super-strong glue, and anchoring is conducted through bolts embedded in the RC structure. The RC structure is reinforced through the combination reinforcing method, the bearing capacity, the rigidity and the ductility of an original structure can be substantially improved, and the RC structure is good in deformation coordinated property, resistant to corrosion, cracking, fatigue and impact, and durable.