59results about How to "Increased splitting strength" patented technology

The invention designs novel high performance fiber concrete in the field of building materials. Steel fibers and polypropylene fibers with low mixing quantity are added in original concrete. The volume ratio range of the steel fibers is 0.5-1.5 percent, and the volume ratio of polypropylene is 0.055-0.165 percent. Cement in the original concrete is C50, and the original concrete comprises the following components in percentage by weight: 16.8 percent of the cement, 32.2 percent of sands, 36.9 percent of pebbles, 8.2 percent of water, 5.7 percent of fly ash and 0.2 percent of water reducer. By adding the polypropylene, at the early stage, crack developing of the concrete is limited, and an internal structure of the concrete is improved; and the steel fibers limit and delay the occurrence and the development of a macroscopic crack at the later phase, are connected with parts of developed cracks and efficiently strength the intensity of the concrete. In addition, through coordination work of the three of the steel fibers, the polypropylene fibers and the original concrete, the positive hybrid effect is generated, the ductility, the toughness, the impermeability, the fatigue performance, the shrinkage and the creep of the concrete can be better improved, and excellent working performance is generated.

The invention relates to multi-strength regeneration brick aggregate fiber concrete and a preparing method thereof. The multi-strength regeneration brick aggregate fiber concrete is prepared from cement, fine aggregate, natural coarse aggregate, regeneration brick coarse aggregate, polyolefin fiber, steel fiber and water according to the weight ratio of 1: (0.780-1.309) : (0-1.830) : (0.390-1.568) : (0-0.019) : (0-0.161) : (0.33-0.48). The regeneration brick aggregate fiber concrete with the target strength grade of CF30-CF50 can be prepared by means of the raw materials, strength grade is high, and application range is wide. The obtained regeneration brick aggregate fiber concrete has high working performance including peaceability and water-retaining property, compressive strength and splitting-tension strength are high, the preparing process is simple and environmentally friendly, and construction is easy.

The invention discloses a road and bridge expansion joint structure. The road and bridge expansion joint structure comprises an inverted-T-shaped plate component with the bridge longitudinal cross section being in an inverted T shape. Two wing plates of the inverted-T-shaped plate component transversely extend into a base body of a bridge pavement layer. A web extends upwards to be flush with the upper surface of the bridge pavement layer. Each wing plate is sequentially provided with a cushion layer and a protection wear-resisting layer from bottom to top in a laying mode and is longitudinally connected with the bridge pavement layer. An expansion joint notch and the two sides of the expansion joint notch are filled with elastic layers to be sealed. The road and bridge expansion joint structure has the advantages of being convenient to construct, reasonable in design, high in efficiency, good in vehicle load bearing performance, good in elasticity, smooth and attractive in surface, and good in waterproofing, anti-aging, anti-fatigue, shock resistance and corrosion resistance. In accordance with the characteristics of an expansion joint, three materials of different components and matching ratios are adopted, layered pavement is conducted according to different stress conditions and states, good durability is achieved, construction is rapid and simple, and the expansion joint performance requirement can be well met.

The invention relates to waste sintered brick recycled C30 concrete and a preparation method thereof. The waste sintered brick recycled C30 concrete is prepared from cement, a waste sintered brick recycled coarse aggregate, a fine aggregate, water and a water reducing agent at a weight ratio of 1 to (1.679-1.737) to (0.653-0.817) to (0.367-0.397) to (0.006-0.01). The C30 concrete prepared by the method disclosed by the invention is qualified and stable in strength, high in compressive strength and split and tensile strength, good in working performances such as workability, fluidity and water retention property, simple and environmentally friendly in preparation process and easy to implement.

The invention provides fiber compound regenerative asphalt concrete, which is prepared from the following ingredients (by weight): 30 parts of 0-5mm regenerative asphalt concrete RAP, 25 parts of 5-10 mm regenerative asphalt concrete RAP, 28 parts of 10-30 mm regenerative asphalt concrete RAP, 15 parts of 10-30 mm new aggregate, 2 parts of mineral powder, 1.5 parts of cement, 4 parts of emulsified asphalt, 1 part of a regenerant and 1.2 parts of glass fiber. The glass fiber of 6 mm long is added to improve material performance of a cold recycled mixture. The glass fiber is obviously better than other fibers. The special fiber has obviously more excellent dispersion effect in the cold recycled mixture than other fibers, and the regenerative mixture is smooth to discharge. The fiber compound regenerative asphalt concrete provided by the invention has obviously more excellent material performance than the code requirements. Tension strength, namely cleavage strength, of the mixture is raised. Material anti-cracking ability is more excellent, reflection crack resistance is stronger, the material is more compact, moisture damage resistance is stronger, and durability is better.

The invention relates to waste sintered brick recycled C25 concrete and a preparation method thereof. The C25 concrete is prepared from cement, waste sintered brick recycled coarse aggregate, fine aggregate and water at a mass ratio of 1: (1.76-1.96): (1.15-1.23): (0.42-0.46). The prepared concrete has qualified and stable strength as well as good working performance such as workability, fluidity, water-retaining property and the like, the preparation process is simple and environment-friendly, and construction is easier.

The invention discloses reinforced C30 fly ash ceramsite concrete and a preparation method thereof. The concrete is prepared from cement, steel fibers, basalt fibers, nano SiO2, fly ash ceramsite, fine aggregate, a water reducing agent and water according to a required weight ratio. In the presence of the fly ash ceramsite and through the synergistic effect between the fly ash ceramsite and otherraw materials, the prepared concrete is low in mass and high in strength, and has excellent heat preservation and insulation performance, the structure is dense, and the strength, toughness and durability of the concrete are remarkably improved. Waste can be recycled, the concrete with the remarkably improved performance is obtained under the condition that a small quantity of additive exists, andgood application prospects are achieved.

The invention discloses a strong-strength denitration catalyst and a preparation method for the same. The denitration catalyst is prepared from the following raw materials in parts by weight: 80 to 100 parts of titanium dioxide, 20 to 35 parts of silicon dioxide, 8 to 16 parts of tungsten trioxide, 3 to 8 parts of vanadium pentoxide, 1 to 6 parts of expanded perlite, 2 to 7 parts of attapulgite, 1 to 3 parts of hollow glass beads and 1 to 3 parts of polyester fibers. The preparation method for the denitration catalyst comprises preparation of a catalyst substrate, impregnation and adsorption with mixed liquor, and drying and calcination. The denitration catalyst disclosed by the method is strong in compressive strength and cleavage strength, moderate in porosity, low in pulverization and cracking rate, high in catalytic efficiency and long in service life, the using amount is greatly reduced, a preparation process is simple and controllable, and the energy consumption is reduced.

The invention discloses a new and old pavement base splicing interface treatment material, belongs to the field of road engineering, and aims to provide a new and old pavement base splicing interfacetreatment material for highway reconstruction and extension engineering. The new and old pavement base splicing interface treatment material comprises, by weight, 50-100 parts of an organic silicon modified polyurethane emulsion, 1-3 parts of organic modified rectorite, 100-200 parts of cement, 0.5-1.5 parts of a water reducer, 20-50 parts of water and 0.5-2.5 parts of a composite retarder. The new and old pavement base splicing interface treatment material is used for solving the problems of existing base splicing interface materials, and has the advantages of simple preparation process, stable performances, high bonding strength and good splicing effect.

The invention provides an extraction slot wedge for high intensity glass fiber cloth, comprising the following compositions in percentage by weight: 32-34 percent of alkali-free glass cloth and alkali-free glass fibers and 66-68 percent of adhesive. Because the alkali-free glass cloth is introduced, the adhesive is improved and the transverse mechanical strength of the slot wedge is increased, the slot wedge has excellent mechanical property and solvent and chemical medicine resistance under high temperature and particularly keeps stronger split resistance under high temperature, wherein the split resistance can achieve above 3000N / 10mm. The invention can completely satisfy the running requirement of a motor.

The invention relates to a motor stator slot portion insulation structure. The structure comprises a stator core (1), the stator core (1) is provided with a stator slot (2), a coil (3) is disposed in the stator slot (2), a slot insulation structure (4) and a coil fixing structure (5) are disposed between the coil (3) and the stator slot (2), the slot insulation structure (4) comprises an insulation glue layer (41), a low-resistance paint layer (42),a rubber layer (43) and low-resistance cloth (44), and fixing materials used in the coil fixing structure (5) are 3241 semiconductor cushion strip. A practical application shows that a motor set adopting the stator slot portion structure runs well in a high-altitude area, set discharging, burnout and other accidents do not occur, set running safety can be effectively guaranteed, and the service life of the set is prolonged; and the whole insulation structure adopts homemade materials, economic cost is low, independent research, development and innovation of science and technology in our county are facilitated, and dependency and instability of imported foreign materials are reduced.

The invention discloses a method for improving sparse grain and dense grain of crammed clipped fabric and the fabric woven through the method. The amplification of the weft density of the pattern portion of the fabric is calculated, and weaving is carried out by adjusting the weft density according to the arrangement of ground weft and pattern weft. According to the method, under the condition of not changing original equipment, the effect of eliminating the sparse grain and the dense grain on the surface of the crammed clipped fabric is achieved by adjusting technological parameters, the operation is easy, the variety adaptability is good, and the method is suitable for the crammed clipped fabric of various pattern effects. The appearance quality of the fabric meets requirements, meanwhile, the internal quality of the fabric is improved by adjusting the weft density, and the splitting strength of the fabric is improved.

The invention discloses a road base mixture. The road base mixture comprises the following components in parts by weight: 1-2 parts of cement; 2-10 parts of coal ash; 5-15 parts of furnace slag; 30-45parts of gravels; 0.5-1 part of silica fume; and 1-2 parts of excitant. In the road base mixture, the main components of the furnace slag are SiO2 and Al2O3; the main component of the silica fume isSiO2; the furnace slag and the silica fume can react with Ca (OH) 2 generated by hydration reaction of the cement, so that C-A-H and C-S-H gelling substances with stable chemical properties can be generated, so that the mixture has higher strength. On the premise of ensuring that various performance indexes meet the requirements, the utilization rate of the fly ash and the furnace slag is increased as much as possible, cement consumption is reduced, economic benefits are maximized, and various performance indexes are optimized. According to the road base mixture of the invention, the fly ash and the furnace slag are applied to road infrastructure construction, so that the pollution to the surrounding environment caused by accumulation of a large amount of industrial wastes is reduced, theconsumption of natural gravels can be reduced, and the purposes of changing wastes into valuables and realizing sustainable development are achieved.