13results about How to "Improve initial strength" patented technology

The invention discloses geopolymer regenerated fireproof mortar based on porous light filler and a preparation method of the geopolymer regenerated fireproof mortar. The fireproof mortar is prepared from the following raw materials: 460 to 520 parts of cementing material, 210 to 360 parts of porous light filler, 330 to 380 parts of alkali activator, 120 to 500 parts of regenerated fine aggregate and 180 to 280 parts of water, the porous light filler is preferably selected from fly ash hollow microspheres. The preparation method comprises the following steps: uniformly mixing the cementing material, the porous light filler and the recycled fine aggregate to obtain a dry mixture; and adding an alkali activator into the dry mixture to obtain the geopolymer regenerated fireproof mortar. And after the age is reached, demolding and curing are carried out. By utilizing the characteristics of high porosity, low heat conductivity coefficient and the like of the porous light filler, the heat preservation and heat insulation capabilities of the geopolymer regenerated mortar are improved, the fireproof performance of the geopolymer mortar is greatly improved, and meanwhile, the resource utilization of solid wastes is realized.

The invention belongs to the technical field of luminescent materials, and particularly relates to a luminescent material, an anti-counterfeiting optical thin film and a preparation method thereof. The chemical general formula of the luminescent material is SrGa < 12-x > Mn < x > O < 19 > / Ga < 2 > O < 3 >, and x is equal to 0.025 to 0.035. The preparation method of the anti-counterfeiting optical thin film comprises the following steps: uniformly mixing a luminescent material, a PDMS polymer and a curing agent to obtain colloid, and curing to obtain the optical thin film, the mass ratio of the luminescent material to the PDMS polymer is 1: (0.65-1.5), and the mass ratio of the PDMS polymer to the curing agent is (9-10): 1. The invention overcomes the defects that inorganic fluorescent powder in the prior art only has one light-emitting mode of photoluminescence, is poor in anti-counterfeiting effect and is easy to counterfeit.

The present invention discloses a method for treating mud bubbling in ballasted railway expansive rock and soil roadbed, including grading the soil expansion potential of the subgrade according to clay composition and content test data; calculating the average annual precipitation; investigating the mud bubbling degree of the subgrade, and determining the basic characteristics of mud bubbling through statistical analysis; determining the degree of drainage blockage; investigating the wear, direction, height change and triangular pits of the rail surface, and determining the state of the rail; grading the mud bubbling disease according to the calculation results; and determining the corresponding tough and fast-strengthening anti-seepage waterproof protective layer and specific treatment plan according to the mud bubbling disease grade. The present invention improves the overall strength of the subgrade surface layer of the subgrade through a method for constructing a tough and fast-strengthening anti-seepage protective layer on the subgrade surface, blocks the hydraulic connection between atmospheric precipitation and the hydrophilic minerals of the subgrade surface rock and soil, and quickly forms a tough waterproof layer with a certain strength, which is suitable for the rapid construction of existing operating railway lines, and cures the mud bubbling disease from the source of the subgrade.

The invention discloses a bio-based solvent type asphalt cold supplementing liquid, the raw materials of the cold supplementing liquid comprise petroleum asphalt, a diluent, a tackifying modifier and a bio-based underwater adhesive, and the bio-based underwater adhesive is one or a mixture of more than two of barnacle gum, mussel secreted adhesive protein and polyphenylene catechol ethylene; the cold patch material has very good binding power, can quickly form relatively high initial strength, has excellent water stability and strong water damage resistance, can complete crosslinking and effective adhesion under a water condition, and can establish functions of interface contact, molecular adsorption between various substrates and the like in the process, so that the cold patch material can be normally constructed under the condition that a pit slot has water; the system is not limited by environmental conditions and has higher instantaneity, so that the system is used for all-season all-weather construction and long-term storage; the concrete has the advantages of simple preparation process, excellent construction workability and initial stability, can be easily mixed and paved manually by using a shovel when being used for cold patch of asphalt mixtures, and has high initial strength and forming strength after pit slot repair.

The invention provides a degradable antibacterial bioactive interface screw and a manufacturing method thereof. The interface screw comprises a screw shell, a head part, a rod part with external threads and a tail part are sequentially arranged in the axial direction of the screw shell, and the tail part is of a conical structure; an inner core penetrating through the rod part is arranged in the screw shell, the inner core is of a network-shaped porous structure, and a release hole channel communicating with the inner core is formed in the outer surface of the rod part; the inner core is filled with an antibacterial functional body, the antibacterial functional body comprises gallium-silver composite antibacterial particles, and the gallium-silver composite antibacterial particles are released into the external environment of the screw shell through the release hole channels. According to the technical scheme, the interface screw can promote bone-ligament interface healing, controllable release of antibacterial components is achieved, the structure can be flexibly adjusted through a digital model, and the interface screw is suitable for personalized ligament reconstruction operations.

The application discloses a kind of goaf filling cementitious material, filling test block and preparation method thereof, and the mass ratio of the goaf filling cementitious material is as follows: stone coal vanadium extraction tailings 50-70%, stone coal vanadium extraction neutral residue 5-20%, smelting slag 0-15%, cement clinker 10-30%, and activator 2-8%.The filling test block also includes full tailings filling material and tap water, the mass percentage of the tap water is 18-30%, and the mass ratio of the goaf filling cementitious material to the full tailings filling material is 1:12-1:4.The goaf filling cementitious material uses stone coal vanadium extraction tailings as the main raw material, can be applied to mine tailings filling nearby, helps to large-scale, stable absorption of vanadium tailings, avoids the problems caused by tailings accumulation, and has a positive effect on the green development of mine and the friendly development of mining industry and social environment.The preparation method of the goaf filling cementitious material is simple, the main raw materials used can be obtained nearby, which helps to reduce the production cost of the cementitious material.

This invention discloses a room-temperature bio-based asphalt cold patch and its preparation method. The cold patch comprises 96.5-98 wt% recycled asphalt pavement material and 2-3.5 wt% bio-based asphalt cold patch liquid. The cold patch liquid comprises 60-70 wt% base asphalt, 10-20 wt% bio-based diluent, and 20-30 wt% bio-based regenerator. The preparation method includes the following steps: preparing epoxidized soybean oil methyl ester and hydrogenated ricinoleate methyl ester; mixing vegetable oil and its derivatives, fatty acids and their esters, natural small-molecule organic components, and oxalic acid at room temperature to obtain a bio-based diluent; heating the base asphalt to a fluid state and adding the bio-based regenerator, followed by cooling and adding the bio-based diluent to obtain the cold patch liquid; and adding the cold patch liquid to the recycled asphalt pavement material and mixing to obtain the cold patch. The bio-based asphalt cold patch of this invention has high initial strength, high pavement stability after repair, and significantly reduces the rework rate and the probability of recurring defects.

This invention relates to the field of magnesium alloy preparation technology, specifically to a high-strength, high-ductility, multi-scale hierarchical heterostructure magnesium alloy and its preparation method. The magnesium alloy, by weight percentage (100%), comprises the following components: Mg: 65-70%, Sc: 20-33%, with the balance being Gd. The preparation method includes: S1, weighing Mg, Sc, and Gd metals, and vacuum melting to obtain a magnesium alloy ingot; S2, solution treatment and aging to precipitate needle-like secondary α phase within the β phase; S3, high-temperature hot rolling to promote dynamic recrystallization; S4, heat treatment to adjust the biphase structure ratio of the magnesium alloy, promoting the precipitation of nano-B2-rich Sc particles and L12-rich Gd nano-precipitates, followed by cold quenching to room temperature to obtain a hierarchical heterostructure magnesium alloy. The hierarchical heterostructure prepared by this invention has a maximum tensile strength of 493 MPa, a maximum yield strength of 439 MPa, and a maximum elongation after fracture of 40.8%. This invention, through heat treatment process control and Gd alloying, produces a hierarchical heterostructure magnesium alloy with excellent comprehensive mechanical properties.

The utility model relates to the technical field of pavement base structures, and particularly discloses a semi-flexible asphalt pavement base structure, which comprises a rammed earth layer, a rammed earth layer and a semi-flexible asphalt pavement base structure, the gravel part is laid on the surface of the rammed earth layer; the stabilizing part is laid on the surface of the gravel part; the concrete part is laid on the surface of the stabilizing part; according to the utility model, the thick broken stone hardcore is arranged, the roller press is used for compacting to ensure that gaps among broken stones are filled, the cement-based grouting material with high flowability is poured, the trowelling machine is used for compacting to form a uniform hardcore, the roller press is used for final compacting to ensure that the whole hardcore is flat and firm, and the cement-stabilized base layer is adopted, so that the construction efficiency is improved. Graded broken stone serves as aggregate, gaps of the aggregate are filled with a certain amount of cementing materials and enough mortar, the strength is increased along with the age, and a plate body is rapidly formed.

The invention belongs to the technical field of silk paper, and particularly relates to high-wet-strength nano silk paper which comprises a base material layer, and the base material layer is a basic network structure of the paper formed by interweaving hemp fibers or straw fibers and plant fibers; a polymer coating is coated on the base material layer, and a colloid substrate layer is arranged at the bottom of the base material layer. The base material layer is a tough network formed by interweaving hemp or straw fibers, so that the strength and the stability are improved, and the environment-friendly effect is achieved. The thickness of the polymer coating can be adjusted, and the waterproof and breathable performance can be optimized according to scenes. And the colloid substrate layer has multiple selections and is wide in viscidity adaptation. The fiber pretreatment technology improves the uniformity and strength of the paper, and the whole paper has excellent performance in multiple fields and wide application prospects.

The invention provides a single-component polyurethane material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The polyurethane material is prepared from the following raw materials in parts by weight: 40 to 60 parts of mixed polyurethane prepolymer, 2 to 4 parts of polyester polyol, 4 to 20 parts of plasticizer, 0.5 to 1.5 parts of compound catalyst, 0.5 to 2 parts of coupling agent and 25 to 50 parts of filler, wherein the mixed polyurethane prepolymer is an MDI (methylene diphenyl diisocyanate) prepolymer and an IPDI (isophorone diisocyanate) prepolymer; the compound catalyst is a mixture of a tin catalyst and an amine catalyst. The single-component polyurethane material is high in initial strength, better in construction thixotropy and lower in raw material cost, the curing speed is obviously higher than that of a traditional single-component polyurethane material under the same surface drying time, and the final strength and the elongation at break of the product are obviously higher than those of the traditional single-component polyurethane material.

The present invention provides a quick remedial material for potholes in asphalt concrete pavement and a preparation method thereof, which belongs to the technical field of asphalt pavement repair materials. The preparation method comprises: providing a liquid material, the liquid material comprises road petroleum asphalt, an emulsifier aqueous solution, a polymer resin and a nano-additive material; providing a solid material, the solid material comprises aggregate and cement; providing a mixing device, so that the liquid material and the solid material are in contact in the mixing device, and are stirred and mixed evenly, so as to obtain the quick remedial material for potholes in asphalt concrete pavement; the mass of the liquid material is 5-20% of the mass of the solid material. The quick remedial material of the present invention has a short setting time, high strength, strong adhesion between the new and old interfaces, no need to add water during mixing, no need to close traffic during construction, and traffic can be opened immediately after construction. It can be mixed and used at room temperature, is not affected by air temperature and environment, has no toxic gas discharge, is safe and environmentally friendly, and has lower production cost.

This invention relates to the field of soft-light tile technology, and in particular to an environmentally friendly and wear-resistant soft-light tile and its preparation method. The components, by weight, include 20-40 parts quartz, 30-60 parts waste slag powder, 10-25 parts feldspar, 10-20 parts kaolin, 5-15 parts clay, 5-15 parts talc, 5-15 parts lamellar alumina, 1-5 parts sintering aid, and 0.5-3 parts binder. This invention employs the aforementioned environmentally friendly and wear-resistant soft-light tile and its preparation method, combining waste slag powder and lamellar alumina with other components. This breaks through the traditional single-aggregate reinforcement mechanism. The preparation process uses a two-stage sintering process, resulting in a stronger bond between the glaze and the body, a more uniform surface texture, and greater controllability of the soft-light effect.