11results about How to "Promotes hydration" patented technology

The application relates to the technical field of roadbed engineering, in particular to a roadbed filler based on high-water-content gold flotation tailings and a preparation method thereof.A roadbed filler based on high-water-content gold flotation tailings is prepared from the following raw materials: gold flotation tailings, modified precipitation material, curing agent, activator, solid modifier and anti-cracking agent; the water content of the gold flotation tailings is lower than 20%; in the application, the porous precipitation material and the low-carbon cementing material are used to perform pre-dehydration treatment and efficient curing treatment on the high-water-content gold flotation tailings, so that the roadbed filler with low carbon and low cost and with high strength and low shrinkage is obtained.

This invention discloses a method for preparing an in-situ reinforced single-atom nanoenzyme bactericidal composite material for concrete. The method includes using sodium ferric ethylenediaminetetraacetate (EDTA) as a core precursor, and encapsulating calcium peroxide on its surface through an in-situ reaction to form a composite precursor of calcium peroxide encapsulating EDTA; directional hydrolysis of tetraethyl orthosilicate (TEOS) to form a thin layer of silica on the surface of the composite precursor; subsequent calcination under an inert gas to obtain a three-layer core-shell composite material of single-atom iron nanoenzyme / porous calcium peroxide / porous silica; and finally, grafting with aminosilane to obtain a three-layer core-shell composite material of single-atom iron nanoenzyme / porous calcium peroxide / porous silica with surface-grafted aminosilane. The composite material prepared by this method can achieve continuous and efficient bactericidal action in concrete while increasing nucleation sites, promoting hydration, and effectively improving the early strength and durability of concrete.

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of a filter-press mud cake as a flow-state filling material. The method comprises the following steps: adding basalt fibers into gamma-aminopropyltriethoxysilane to obtain basalt fibers subjected to surface treatment, and stirring and mixing the basalt fibers subjected to surface treatment with a modified siliceous material to obtain a fiber reinforced material; stirring 70-80 parts of the filter pressing mud cake, 3-6 parts of a curing agent and 3-5 parts of a fiber reinforced material, then adding 2-4 parts of an early strength agent, 8-12 parts of recycled fine aggregate and 0.1-0.2 part of an air entraining agent, and stirring to obtain the flow state filling material. The material obtained in the invention has good mechanical properties, durability and contractibility.

The utility model discloses a kind of wear-resistant castable preparation devices, including base, the upper of base central position is provided with preparation tank, the upper end of preparation tank is provided with jar cover, the lower end of jar cover is provided with rotating rod, rotating rod is rotatably connected with jar cover, rotating rod outside is fixedly provided with mounting bracket in upper and lower sides, the inside of mounting bracket is provided with several mounting cavities, mounting cavity is equidistant distribution, and mounting cavity is open structure, the inside of mounting cavity is provided with agitator plate, agitator plate is slidably matched with mounting cavity, agitator plate is equidistant distribution, the inside of mounting bracket is provided with screw hole near mounting cavity central position, screw hole is through structure, the upper and lower sides of agitator plate inside are provided with through-hole, through-hole and screw hole position correspond, and this structure solves the problem that the mixing effect of raw materials is not good enough, and raw materials weighing is not convenient enough.

This invention discloses a phosphorus slag-based cementitious material, its preparation method, and its application, specifically relating to the field of cementitious materials technology. The cementitious material, by weight, comprises the following components: 60-90 parts phosphorus slag powder; 5-25 parts fly ash; 5-15 parts activator; 0.25-1.5 parts early-strength agent; and 0.2-0.5 parts water-reducing agent; wherein the specific surface area of ​​the phosphorus slag powder is 400-550 m². 2 / kg, particle size (D) 90 The particle size is 20-40 μm; the early-strength agent is selected from at least one of iron salts and aluminum salts. This invention uses phosphorus slag micro-powder with a specific specific surface area as the main substrate, with a high dosage, combined with fly ash, activator, early-strength agent, and water-reducing agent to obtain phosphorus slag-based cementitious materials. By optimizing the physical properties of the phosphorus slag micro-powder and constructing a suitable composite activator-early-strength system, the 28-day compressive strength of the cementitious material reaches over 61.0 MPa, achieving a balance between "high phosphorus slag content" and "high strength".

The invention discloses a bridge expansion joint low-carbon quick-hardening early-strength repairing material and a construction method thereof, and belongs to the technical field of engineering construction. The low-carbon quick-hardening early-strength repairing material for the bridge expansion joint is prepared from the following raw materials in parts by weight: sulphoaluminate cement, Portland cement, calcined shell powder, fly ash and silica fume. Reinforced modified fibers, modified shell powder and a water reducing agent. By treating the shell powder and the reinforced fibers, the setting time and the initial strength maturation period of the concrete can be shortened, so that the construction speed and efficiency are improved, the repairing and reinforcing process of the bridge expansion joint is accelerated, the construction period is shortened, and the engineering cost is reduced. The low-carbon quick-hardening early-strength repairing material for the bridge expansion joint can improve the strength and durability of a repairing layer and effectively guarantee safe operation of a bridge, and meanwhile, quick-hardening construction can shorten the traffic interruption time and guarantee quick and normal traffic of a road.

The present application relates to the technical field of artificial stone preparation, in particular to a resin-based artificial stone and a preparation method thereof. The artificial stone comprises the following components in parts by mass: coal gangue 38-45 parts, carbide slag 28-34 parts, desulfurization gypsum 20-30 parts, mineral powder 18-26 parts, water-based epoxy resin 30-45 parts, diethylene triamine 5-10 parts, modified polyurethane fiber 10-15 parts, and quartz sand 220-260 parts. The present application uses solid waste such as coal gangue as a component of the artificial stone, realizes resource utilization, reduces cost, and adds modified polyurethane fiber to effectively improve the performance of the prepared artificial stone.

The invention relates to sprayed concrete and a preparation method thereof, and relates to the technical field of concrete.The sprayed concrete is prepared from, by weight, 365-410 parts of cement, 790-830 parts of fine aggregate, 710-760 parts of coarse aggregate, 70-100 parts of fly ash, 75-95 parts of modified yellow phosphorus slag, 12-16 parts of accelerator, 4.5-7 parts of water reducer, 3-6.5 parts of natural plant admixture and 155-175 parts of water; the natural plant additive is prepared from beet root tubers and gelidium amansii in a weight ratio of (1-2): (5-9). On the basis of an existing shotcrete batching system, the natural plant admixture and the modified yellow phosphorus slag are introduced, all the components have a synergistic effect, the construction requirements for the initial strength and the later strength of the shotcrete are met, the rebound rate of the shotcrete is remarkably reduced, and the shotcrete has a good application prospect. The method can be widely applied to construction of various supporting projects such as tunnels and roadways.

The invention belongs to the technical field of cementing materials, and particularly relates to an organic-inorganic composite alkali-activated cementing material and a preparation method thereof. The modified wollastonite added into the organic-inorganic composite alkali-activated cementing material has a large amount of silicon hydroxyl (Si-OH), and the groups are high in activity, so that the compatibility and binding force of the wollastonite and the styrene butadiene rubber emulsion can be greatly improved. The modified wollastonite provides CaO and SiO2 at the same time, a hybridization system composed of N-A-S-H gel, C-A-S-H gel and unreacted wollastonite needle-shaped particles is formed, the hybridization system can force cracks to deflect, bypass and branch in the expansion process, more fracture energy is consumed, and therefore the fracture toughness and toughness of the material are improved.

The invention discloses a solid waste grouting material suitable for soft and loose soil layer and karst reinforcement and a preparation method. The solid waste grouting material comprises the following solid waste base materials in parts by weight: 25-50 parts of ardealite, 8-33 parts of steel slag micro powder and 25-50 parts of mineral powder; the alkali activator is prepared from sodium silicate and water, and the sodium silicate and the water respectively account for 15% and 40% of the total mass of the solid waste base material; the preparation process of the solid waste grouting material comprises the following steps: mixing and stirring the solid waste base material to obtain a solid phase I; uniformly mixing and stirring the weighed sodium silicate and water, standing for 10-20 minutes, and curing to obtain an alkali activator; and pouring the solid phase I and the alkali activator into stirring equipment, and continuously stirring for 3-5 minutes. The ardealite, the steel slag micro powder and the mineral powder are used as solid waste raw materials, the alkali activator is added, and the prepared solid waste grouting material has excellent workability, mechanical strength and corrosion resistance and further has the advantages of being low in carbon and environmentally friendly.

A preparation method of coal gangue autoclaved aerated concrete and application of a regulator thereof, the regulator comprising a combination of one or more of silica fume, silica sol, sodium tripolyphosphate, etc. A coal gangue autoclaved aerated concrete, raw materials of the coal gangue autoclaved aerated concrete comprising more than 50% of coal gangue in total mass of the raw materials of the coal gangue autoclaved aerated concrete. A method for preparing coal gangue autoclaved aerated concrete, comprising: step 1: decarburization treatment of the coal gangue, the decarburization treatment comprising photoelectric sorting and / or water washing flotation; after the decarburization treatment, the carbon content of the gangue is less than or equal to 7%; step 2: mixing and stirring the raw materials of the coal gangue autoclaved aerated concrete, then pouring and standing, cutting and demolding, pre-curing, autoclaved curing to obtain the autoclaved aerated concrete. The method can greatly shield or reduce the influence of carbon content and low activity of coal gangue and improve the compressive strength of the product by multi-stage decarburization, single-doped and multi-doped complex doped regulator.