42results about How to "Does not affect durability" patented technology

The invention relates to a pressure-sensitive adhesive for a polaroid. The pressure-sensitive adhesive for the polaroid comprises 100 weight parts of crylic acid copolymer, 0.1 to 0.5 weight part of isocyanate-based crosslinking agent and 1 to 4 weight parts of hydrophobic ionic liquid, wherein the hydrophobic ionic liquid serves as an antistatic agent and has compatibility with the pressure-sensitive adhesive. The pressure-sensitive adhesive for the polaroid adopts the hydrophobic ionic liquid serves as the antistatic agent, and is optically transparent, durable and reliable.

The invention discloses a polycarboxylate cement grinding aid and a preparation method thereof. The preparation method comprises the following steps of: performing copolymerization on comonomers in aqueous solution in the presence of an initiator to obtain a polymer A, wherein the comonomers comprise ether monomers, amine monomers and carboxylic acid monomers; and adding a small amount of alcamines substance B into the polymer A to obtain the polycarboxylate cement grinding aid. The grinding aid has the advantages of obviously improving grinding efficiency and greatly improving cement strength, along with simple production method and environmental protection.

The invention relates to a method for quickly repairing cement concrete pavement. The method comprises the following steps of: (1) prefabricating a cement concrete plate; (2) clearing the original plate damaged by diseases; (3) processing the original base layer; (4) conveying and hoisting the plate; (5) leveling the plate; (6) grouting locally; and (7) processing joints. Through the invention, the road closing time is shortened, the centralized backfield maintenance of the cement concrete pavement plate is realized, and the restriction on vehicle passage caused by traditional several days of maintenance after cement concrete pouring is avoided; the cost is low, the prefabricated spliced pavement has long service life, and the cost of restricting the traffic passage for road repair and construction is reduced; the durability is good, and the cement concrete prefabricated member is proved with excellent durability in bridges and house buildings; and the influence of weather conditions is avoided since the prefabricated slab can be constructed in hostile environment without influencing the strength and durability of the pavement slab.

The invention relates to a crystalline nucleus early-strength polycarboxylic acid water reducer and a preparation method thereof. The water reducer comprises the following components in percentage byweight: 10-20% of tricalcium silicate, 20-30% of carboxylic acid vinyl copolymer and 50-70% of deionized water. The preparation method comprises the following steps: adding tricalcium silicate, carboxylic acid vinyl copolymer and deionized water into a ball mill according to proportion, adding zirconia grinding balls, and performing ball milling to obtain the crystalline nucleus early-strength polycarboxylic acid water reducer with a median particle size of less than or equal to 500nm. The crystalline nucleus early-strength polycarboxylic acid water reducer provided by the invention integratesthe advantages of the water reducer and the early-strength agent, the main raw materials are tricalcium silicate and polycarboxylic acid water reducer, which will not cause strength decreasing in thelater stage, the water reducer is mixed into ordinary portland cement mortar according to the mixing amount of 1.0-2.0%, so that the water reduction rate can reach more than 30% and the 12h strengthincrease ratio can reach more than 250%. The preparation method is simple in process, easy to control the process parameters and easy to popularize.

The light fill body structure includes soil layers and foamed plastic block layers superposed alternately. In all the foamed plastic block layers, there are drilled soil column holes. There are also concrete layer over the top foamed plastic block layer, bottom crushed stone layer below the lowest foamed plastic block layer, and retaining wall to the sides of the fill body structure. The present invention is easy to construct, and has density lower than common soil, adjustable strength, light pressure to soil, and less deposit and side flow. The present invention makes it possible to refill soil vertically.

The invention discloses a manufacturing method of a sulphur resistant Velcro, including procedures as follows: the Velcro is put into a tincture machine to be cleaned, then the Velcro is bleached; and then the bleached Velcro is dehydrated by a hydroextractor, and is friezed by a friezing machine; then the bleached and friezed Velcro undergoes sulphur resistant treatment and gum with a gum machine, and finally is dried by baking. When the sulphur resistant Velcro manufactured by the method of the invention is used as a Velcro for products such as rubber products, the Velcro can not turn yellow, which is caused by the sulphur contained gas released during the processing process of the rubber products; therefore, the utility model has the characteristics of beautiful appearance and durable use.

The invention discloses a concrete glue reducing agent and belongs to the technical field of concrete admixtures. The concrete glue reducing agent is composed of the following components in percentageby weight: 20%-45% of organic amine, 15%-30% of low-molecular-weight polyethylene glycol, 0.01%-0.1% of a bubble adjusting component and the balance of water. The concrete glue reducing agent disclosed by the invention is non-toxic, simple in process, pollution-free, low in energy consumption and easy for industrial production; and the peaceability of concrete can be effectively improved, the slurry enrichment rate of cement-based slurry can be improved, the chemical reaction effect of a cement-based gel material in the concrete can be improved, and the cost of the concrete can be saved.

The present invention has: an inner cylinder (11) coupled to either one of a vibration generator and a vibration receiver; an outer cylinder (12) coupled to the other of the vibration generator and the vibration receiver; an intermediate cylinder (13) fitted on the inner circumferential surface of the outer cylinder (12); a main elastic body (14) for connecting the inner cylinder (11) and the intermediate cylinder (13); and stopper elastic bodies (15, 16) that are fixed to the intermediate cylinder (13) and that face the inner cylinder (11), there being interposed therebetween at least hollow sections (17, 18) formed in a direction orthogonal to the inner cylinder shaft direction so as to penetrate the main elastic body (14) in the inner cylinder shaft direction so that the stopper elastic bodies (15, 16) remain independent of the main elastic body (14). The stopper elastic bodies (15, 16) respectively have shaft direction stopper sections (15a, 16a) that protrude more in the inner cylinder shaft direction than the intermediate cylinder (13) and the outer cylinder (12).

The invention discloses a retarder for magnesium phosphate cement and a use method of the retarder. The retarder for the magnesium phosphate cement is prepared from the following materials in parts by weight: 23 to 48 parts of borax, 27 to 38 parts of magnesium sulfate heptahydrate and 1 to 6 parts of sodium acetate trihydrate. According to the invention, multiple retarding technologies are combined for use, a retarding effect is obvious, and the retarding effect is easy to adjust and controllable; the retarder is simple and practical, additional facility or measure cost is not increased, and construction management difficulty is not increased; safety and reliability are achieved, ions (such as chloride ions) harmful to a concrete matrix are not introduced, and structural strength and durability are not affected; and the retarder is high in applicability, can be introduced into magnesium phosphate cement paste, magnesium phosphate mortar and magnesium phosphate concrete for use, and is stable in effect.

A support structure and construction method using shear pins to support shield tunnel segment openings, the invention relates to the technical field of shield tunnels; it includes shear pins, front ring segments and rear ring segments; the front ring segment The segment and the rear ring segment are spliced ​​and arranged, and the shear pins that fit each other are clamped in the front ring segment and the rear ring segment. Special segments with prefabricated holes are produced by modifying the mold, and shear pins are inserted in the segment assembly process, and the shear pins are used to bear the shear force generated after the segments are broken at the segment openings, without additional support , does not affect the durability of the segment, nor does it affect the transportation in the tunnel during tunnel construction and ensure the structural safety.

The invention provides a two-part or multi-part double-layer type wearproof impact-resistant tube. The wearproof impact-resistant tube comprises an outer protection tube (1) and an inner wearproof combined tube (2). The inner wearproof combined tube (2) is embedded in the outer protection tube (1) and comprises two or more tube walls which are spliced together to form a tube body with an annular cross section. The wearproof impact-resistant tube can be straight or bent. When the wearproof impact-resistant tube is straight, the upper portion and the lower portion of the inner wearproof combined tube are made of different materials; when the wearproof impact-resistant tube is bent, the big bend portion and the small bend portion of the wearproof impact-resistant tube are made of different materials. In conclusion, the inner combined tube of the wearproof impact-resistant tube is divided into at least two portions, and at least two portions are made of different materials. The wearproof impact-resistant tube of the structure has the advantages that service life can be prolonged, abrasive resistance and impact resistance can be enhanced and overall weight of the tube can be reduced.

The invention relates to antibacterial cement concrete and a preparation method thereof. The antibacterial cement concrete is prepared from the following raw materials in parts by weight: 12-18 parts of cement, 0.6-1 part of metakaolin, 32-55 parts of quartz sand, 58-120 parts of coarse aggregate, 0.012-0.04 part of an antibacterial agent and 5.5-10.5 parts of deionized water. Nano photocatalytic material is doped into the cement concrete as an antibacterial agent, so that the durability of the cement concrete is not influenced, and an antibacterial effect can be achieved for a long time; artificial coarse aggregate is adopted to replace part of natural coarse aggregate, so that the light receiving area of the antibacterial agent in the cement concrete can be increased; in addition, an antibacterial agent is adopted to form a lubricating film on the surface of the coarse aggregate, so that the lubricating degree of the surface of the coarse aggregate is improved, and the fluidity of cement concrete and the material mixing uniformity are improved.

The invention relates to a prefabricated concrete pipe piece with an internal light filling body and a prefabricating method. The prefabricated concrete pipe piece with the internal light filling bodyand the prefabricating method are applied to underground engineering constructed by adopting a prefabricating assembling method. The prefabricated concrete pipe piece is characterized by comprising apipe piece framework, the light filling body arranged in the pipe piece framework and a pipe piece body formed by layering pouring of concrete; and the light filling body is arranged in the extendingdirection of the pipe piece framework and is fixed through a hook on the pipe piece framework. Compared with the prior art, the prefabricated concrete pipe piece with the internal light filling bodyand the prefabricating method have the beneficial effects that the weight of the pipe piece is reduced, the single piece size of the prefabricated pipe piece is increased under the condition that theself weight of the pipe piece is not increased, the pipe piece construction convenience is improved, the construction efficiency can be effectively improved, raw materials are saved, the constructioncost is saved, resource losses are reduced, green construction is achieved, and influences to the environment are reduced.

The invention relates to a precast pipe ring filled with light filler concrete and a precasting method; and the precast pipe ring is applied to underground engineering constructed by a precasting assembly method. The precast pipe ring comprises a pipe ring skeleton, a light filler arranged in the pipe ring skeleton, and a pipe ring main body molded by casting in a layering mode; the pipe ring skeleton comprises a skeleton main body consisting of multiple annular main ribs, and multiple stirrups for binding the skeleton main body; and the light filler is arranged in an annular cavity surroundedby the skeleton main body and the stirrups, and is fixed on the main ribs through hanging hooks. Compared with the prior art, the precast pipe ring has such advantages as reduction of self weight ofthe pipe ring, increment of the size of the precast pipe ring, improvement of the construction efficiency and saving of raw materials.

A porous water permeable brick having a purifying function and a preparing method thereof are disclosed. The water permeable brick includes, by weight, 40-60 parts of waste glass, 40-60 parts of fly ash, 20-30 parts of cement, 5-10 parts of montmorillonite, 5-10 parts of sisal hemp fibers, 10-15 parts of gypsum, 0.5-1 part of sodium lignosulfonate, 0.5-1 part of triterpenoid saponin, 0-0.5 part ofa microbial liquid, 1-5 parts of aggregate, and 5-10 parts of a binder. Reduction treatment of solid waste and utilization of resources are combined, consumption of traditional building materials with high energy consumption and high emission is reduced, and the brick has better environmental protection benefits and economic benefits.

The invention discloses a tire tread pattern structure of an all-terrain vehicle pneumatic tire. A tire tread comprises a left circumferential bar-shaped pattern column and a right circumferential pattern column which are symmetrically arranged along a central plane of the tire and are respectively formed by discontinuous left pattern blocks and discontinuous right pattern blocks in circumferential arrangement, and the left pattern blocks and the right pattern blocks are arranged in a staggered manner, wherein distances from the left pattern blocks and the right pattern blocks to the central plane of the tire are 7%~15% of the width of a tire section; the ground surfaces of the left pattern blocks and the right pattern blocks respectively consist of constant altitude parts positioned at a first ground end, and convergent parts which are positioned at later ground ends and are formed by contracting the constant altitude parts to the bottoms of pattern grooves; at the same time, concave arrangement is formed in the side walls of the first ground ends. Through the arrangement, the tire last is not influenced, and at the same time, the control performance of the tire on the sandy land can also be improved.

The invention relates to the technical field of preparation of polycarboxylate water reducers, in particular to a method for preparing an anti-freeze type high-performance polycarboxylate water reducer by utilizing an amino resin waste liquid. The method comprises the following steps: firstly taking methyl allyl polyoxyethylene ether, methacryloxy ethyl trimethylammonium chloride, maleic anhydride, hydrogen peroxide and a proper amount of deionized water as base materials to put in a reaction kettle, stirring till complete dissolution and then increasing the temperature; after the base materials are dissolved, simultaneously dropwise adding a solution A and a solution B and continuously performing stirring reaction after the end of dropwise adding; then regulating a pH value of a mixed solution to obtain a polycarboxylate water reducer and compounding with the amino resin waste liquid in proportion to prepare. The method provided by the invention has the benefits that as methyl propylene oxiranyl trimethyl ammonium chloride as a cationic functional monomer is introduced, a certain complex can be formed, so that the compactness of a structure self can be improved; the added amino resin waste liquid containing methanol can prevent concrete from freezing, so that the compressive strength, the compactness and the durability of the concrete are not affected.

The present invention relates to a makeup brush holder, and more specifically, to a makeup brush holder comprising: a main body; a cleaning part provided on one side of the main body so as to enable the bristles of the makeup brush to be cleaned by rubbing same; and a holding part provided on the other side of the main body so as to enable the body of the cleaned makeup brush to be held, thereby enabling the makeup brush to be dried and stored. According to the present invention, the cleaning part which can clean the makeup brush is integrally formed, and thus drying as well as cleaning can be done together, thereby maximizing user convenience, and the holding structure for holding the makeup brush does not require mechanical coupling or combining, thus enabling the semi-permanent use thereof without being damaged due to malfunction or having limitations in durability due to repeated use.