174 results about "Natural sand" patented technology

The invention relates to the field of concrete, and provides high-strength concrete and a preparation method thereof, and the high-strength concrete comprises modified basalt chopped fiber, a self-repairing agent, cement, fly ash, slag powder, coarse aggregate, natural sand, a water reducing agent and an air entraining agent. The modified basalt chopped fiber is oxidized by hydrogen peroxide, etched by hydrochloric acid and modified by a nano silicon dioxide coating, so that the interface bonding force is enhanced. The self-repairing agent is prepared by adopting expanded perlite to load bacillus through thallus culture, purification, dipping adsorption and low-temperature vacuum drying, CaCO3 deposition can be induced at concrete cracks, and self-repairing is achieved. The invention further provides a preparation method of the concrete. The preparation method comprises the steps of aggregate screening, hydrated liquid preparation, wet mixing, fiber and self-repairing agent adding, vibration forming and curing. The crack resistance of the concrete is improved by enhancing the fiber-matrix interface bonding force, meanwhile, the service life of the concrete is prolonged by utilizing a biological self-repairing technology, and the concrete is suitable for high-durability concrete engineering.

The invention discloses ardealite-based concrete and a preparation method thereof, and belongs to the technical field of building materials. The ardealite-based concrete is prepared from the following raw materials in parts by weight: 40 to 60 parts of ardealite powder, 10 to 15 parts of cement, 8 to 10.5 parts of slag powder, 5 to 7 parts of fly ash, 4 to 6 parts of desulfurized fly ash, 5 to 10 parts of natural sand, 10 to 15 parts of ardealite-based artificial aggregate, 3 to 5 parts of eggshell powder, 1.5 to 3 parts of nano silicon dioxide, 0.5 to 1.5 parts of a water reducing agent, 0.05 to 0.2 part of a retarder, 0.1 to 0.5 part of an exciting agent and 0.3 to 1 part of an antifreeze agent. According to the invention, through process innovation of multi-component collaborative design and gradient aggregate doping, the technical bottlenecks of low strength, poor durability, high environmental protection risk and the like of traditional ardealite concrete are overcome while large-scale resource utilization of ardealite is realized, and a new thought is provided for high-valued utilization of industrial solid wastes.

A bioenergy generator to increase the life force of a biological system is provided. The bioenergy generator includes fine pieces of natural stone, fine pieces of natural sand, fine pieces of metal, water and a supporting material operable to hold the natural sand, the natural stone, the metal, and the water together. Uses of the bioenergy generator are also provided, in particular, to enhance stem cell production.

A bioenergy generator to increase the life force of a biological system is provided. The bioenergy generator includes fine pieces of natural stone, fine pieces of natural sand, fine pieces of metal, water and a supporting material operable to hold the natural sand, the natural stone, the metal, and the water together. Uses of the bioenergy generator are also provided, in particular, to enhance stem cell production.

A bioenergy generator to increase the life force of a biological system is provided. The bioenergy generator includes fine pieces of natural stone, fine pieces of natural sand, fine pieces of metal, water and a supporting material operable to hold the natural sand, the natural stone, the metal, and the water together. Uses of the bioenergy generator are also provided, in particular, to enhance natural healing ability of a biological body and to treat a disease in a mammal, and to mitigate side effects of cancer treatments.

A bioenergy generator to increase the life force of a biological system is provided. The bioenergy generator includes fine pieces of natural stone, fine pieces of natural sand, fine pieces of metal, water and a supporting material operable to hold the natural sand, the natural stone, the metal, and the water together. Uses of the bioenergy generator are also provided, in particular, to treat long-COVID and influenza.

A bioenergy generator to increase the life force of a biological system is provided. The bioenergy generator includes fine pieces of natural stone, fine pieces of natural sand, fine pieces of metal, water and a supporting material operable to hold the natural sand, the natural stone, the metal, and the water together. Uses of the bioenergy generator are also provided, in particular, to treat a muscular degenerative disease and to improve genetic mutations.

A shoe or other footwear has a non-removable multi-layer foot-support member (FSM) embedded within the sole. The uppermost layer is a breathable, stretchable textile configured for direct contact with the foot, offering softness and elasticity. Directly beneath it is a containment layer made of elastic fabric partially infused or impregnated with silicone, which stabilizes and restrains the granular contents below. The central layer includes one or two or three sealed chambers filled with a cured mixture of silicone and polymeric granules, forming a deformable medium that yields under pressure and mimics natural granular terrain or sand. Beneath this is a synthetic textile layer that restricts lateral expansion of the granular mixture, and preserves chamber geometry during use. The bottom component is a semi-rigid base that structurally supports and anchors all overlying layers.

The invention belongs to the technical field of building materials, and discloses multi-component composite industrial solid waste concrete and a preparation method thereof. Wherein the components of one strength grade are as follows: 5.8%-11.5% of cement, 2.0%-8.0% of fly ash, 1.5%-8.0% of slag, 0%-10.0% of limestone powder, 18.0%-25.0% of machine-made sand, 10.0%-23.0% of tailing sand, 7.0%-8.5% of water and 0.29%-0.42% of an additive; wherein the proportion of each component is the proportion of the total weight of the concrete, and the rest components are broken stones or natural sand. Through reasonable proportion design, the strength grade of the concrete can be adjusted in a wide range, and different engineering requirements are met.

A bioenergy generator to increase the life force of a biological system is provided. The bioenergy generator includes fine pieces of natural stone, fine pieces of natural sand, fine pieces of metal, water and a supporting material operable to hold the natural sand, the natural stone, the metal, and the water together. Uses of the bioenergy generator are also provided, in particular, to treat Parkinson's diseases.

The application discloses a mechanism sand concrete design method for reducing flowability loss over time, which comprises providing a first base material of concrete, compensation water and super absorbent polymer; based on the 5min spread of the mortar mixture prepared based on the first base material and the empirical water absorption of the super absorbent polymer, the estimated water absorption of the super absorbent polymer is determined through a first test; based on the estimated water absorption and the 1h spread of the second base material which is equal to the mechanism sand and replaced by natural sand, the amount of the compensation water is determined through a second test; based on the amount of the compensation water and the estimated water absorption of the super absorbent polymer, the addition amount of the super absorbent polymer in the first base material is determined; based on the addition amount of the super absorbent polymer and the amount of the compensation water, the preset mass ratio is adjusted to obtain the design ratio of the mechanism sand concrete. The application solves the problem that the water absorption of the mechanism sand in the concrete leads to high flowability loss over time of the concrete.

The invention provides carbon sequestration concrete and a preparation method thereof, and relates to the technical field of building materials. The carbon sequestration concrete provided by the invention is prepared from the following preparation raw materials in parts by mass: 280 to 320 parts of cement, 40 to 50 parts of mineral powder, 50 to 60 parts of fly ash, 650 to 700 parts of machine-made sand, 200 to 240 parts of natural sand, 750 to 850 parts of large stone, 150 to 170 parts of small stone, 3.8 to 4.5 parts of a water reducing agent, 0.15 to 0.85 part of a retarder, 4 to 20 parts of sodium carboxylate and 180 to 200 parts of water. Sodium carboxylate is introduced as a carbon sequestration aid, carboxylate radical groups of sodium carboxylate can efficiently complex calcium ions released by cement hydration to form a soluble calcium carboxylate complex, so that the chemical reaction that carbon dioxide is mineralized into calcium carbonate is accelerated, the carbon dioxide absorption capacity of concrete is remarkably improved, and the carbon sequestration efficiency is improved. The carbon sequestration concrete provided by the invention has high carbon sequestration performance and excellent mechanical properties.

The invention discloses low-carbon high-strength concrete and a preparation method thereof, the concrete comprises the following components in parts by weight: 0-150 parts of cement, 150-200 parts of fly ash, 150-200 parts of blast furnace slag, 70-100 parts of silica fume, 10-20 parts of nano MgO, 700-850 parts of sand, 900-100 parts of stone, 9-15 parts of a water reducing agent, 1-5 parts of diethanol isopropanolamine and 95-105 parts of water, the sand is composed of sand with the particle size of 1.25-5 mm and sand with the particle size of 0-1.25 mm, and the low-carbon high-strength concrete is obtained through CO2 curing. Through reuse of the machine-made sand and the natural sand and the synergistic effect of the nano MgO and the diethanolisopropanolamine, the hydration reaction and the pore structure are optimized, the strength and durability are improved, and the cement consumption is reduced; meanwhile, CO2 is converted into carbonate minerals by combining a carbon capture technology, so that the carbon emission is further reduced, and the performance is enhanced; the concrete quality is guaranteed, meanwhile, economic benefits and environmental value are achieved, and the method is suitable for green building engineering.

The invention belongs to the technical field of mortar materials, and particularly discloses an environment-friendly light jet mortar material produced from municipal waste incineration bottom ash, which comprises the municipal waste incineration bottom ash, a cementing material, a water reducing agent, an accelerator and water, the cementing material comprises cement, silica fume and fly ash, the addition amount of the municipal waste incineration bottom ash accounts for 40-50% of the total mass, and the addition amount of the water reducing agent accounts for 10-20% of the total mass. The addition amount of the coal ash accounts for 0-18% of the total mass, the addition amount of the silica fume accounts for 0-12% of the total mass, the addition amount of the accelerator accounts for 6-9% of the total mass, and the use amount of the water reducing agent accounts for 1.5 wt% of the use amount of the cementing material. According to the environment-friendly light jet mortar material produced by adopting the municipal waste incineration bottom ash, in order to reduce the influence of the municipal waste incineration bottom ash on the environment and find a substitute of natural sand, the potential application of the municipal waste incineration bottom ash as a fine aggregate is discussed; meanwhile, the influence of the auxiliary cementing material on improvement of the performance of the jet mortar prepared from the municipal waste incineration bottom ash is investigated.

The invention discloses mass concrete for a water-saving ship lock and a preparation method of the mass concrete. The mass concrete for the water-saving ship lock is prepared from the following raw materials: 252 to 282 parts of moderate-heat anti-cracking cement, 100 to 118 parts of anti-cracking admixture, 235 to 255 parts of phase change sand, 180 to 200 parts of natural sand, 980 to 1020 parts of coarse aggregate, 155 to 170 parts of water and 5 to 7 parts of water reducing agent. The moderate-heat anti-cracking cement is used for replacing ordinary Portland cement, the anti-cracking admixture is used for replacing conventional admixtures such as coal ash mineral powder, and the phase change sand is used for replacing part of natural sand as fine aggregate, so that hydration temperature rise and temperature drop stress of the mass concrete are effectively inhibited; the straw fiber is modified by the modifier, the capability of cellulose and lignin in the straw fiber in participating in cement hydration reaction is excited, the binding power of the fiber and a concrete matrix interface transition area is improved, and waste associated with agricultural products such as straw and chaff can be utilized with high value while the anti-cracking capability of the concrete is improved.

The invention discloses a high-performance lithium ion battery composite diaphragm based on natural desert sand grains and a preparation method of the high-performance lithium ion battery composite diaphragm. Aiming at the technical defects of the traditional polyolefin-based diaphragm, natural desert sand grains are creatively used as a functional coating material, and the composite diaphragm with excellent comprehensive performance is successfully prepared by regulating the particle size of the sand grains to be 75-105 microns, regulating the thickness of the coating to be greater than 210 microns, regulating the coating mode to be single-sided coating and regulating the mass ratio of the sand grains to a binder to be 5: 3. The composite diaphragm fully utilizes the unique natural porous structure and surface characteristics of desert sand grains, and shows excellent thermal stability and electrochemical performance. The first-circle coulombic efficiency of the lithium ion battery applying the diaphragm is improved to gt; meanwhile, the safety and the energy density of the battery are enhanced. According to the invention, the technical concept of treating electricity with sand is realized, an efficient and low-cost new scheme is provided for improving the safety and comprehensive performance of the lithium ion battery, and meanwhile, a new way is opened up for sustainable and high utilization of desert resources.

The invention discloses modified basalt fiber early-strength anti-freezing concrete which is obtained through reverse molding and curing of concrete slurry, the concrete slurry is prepared by mixing cement, shale ceramsite, modified natural sand, modified basalt fibers, a slag mixture, an early-strength anti-freezing agent, a water reducing agent and water, the modified natural sand is prepared by modifying a water glass solution, and the modified natural sand is prepared by modifying a water glass solution. The modified basalt fiber is prepared by carrying out acid etching treatment on basalt fiber and then modifying the basalt fiber with a nano silicon dioxide glue solution; the basalt fiber which is subjected to acid etching treatment and then modified by the nano-silica glue solution is matched with the modified natural sand modified by the water glass solution to serve as fine aggregate, and the water glass solution is used for spraying maintenance during maintenance, so that the freezing resistance of the concrete is greatly improved, and the concrete has high early strength and excellent freezing resistance; and the quality and the service life of the building can be effectively improved and prolonged.

The invention relates to the technical field of foundation engineering construction, in particular to an environment-friendly reinforcement carrier pile and a construction method and device thereof. The environment-friendly reinforcement carrier pile comprises a reinforcement, a rigid pile and a carrier, the construction method comprises the steps that a hollow vibration spiral power head is used for driving high-low pressure nozzles and wing expanding blades of different media such as water, gas, slurry and powder on the outer side of a drill bit at the bottom of a drill rod, and a pile body reinforcement body is formed after grouting jet drilling hole forming and stirring bottom expanding, diameter expanding and top expanding are conducted; stirring and bottom expanding are conducted firstly, then filling and tamping bottom expanding are conducted, and a carrier is completed; the environment-friendly reinforcement carrier pile is formed after plain concrete or reinforced concrete or a precast pile or steel pipe concrete is bonded and wrapped with the reinforcement. The method has the advantages that the efficiency is improved, and the vibration effect is avoided; the low-carbon cementing material is used for replacing traditional cement, and the recycled aggregate is used for replacing natural sand-gravel materials to prepare the low-carbon concrete; and cost is saved, carbon dioxide emission is reduced, energy is saved, and environment is protected.

The invention belongs to the technical field of green building materials, and provides fly ash-based geopolymer concrete and a preparation method thereof. The method provided by the invention comprises the following steps: mixing fly ash, natural sand, a composite activator and water, and sequentially carrying out vibration molding and sealed maintenance on the mixture to obtain the fly ash-based geopolymer concrete. The mixing proportion and the curing process are optimized through orthogonal design, and the compressive strength and the breaking strength of the geopolymer concrete are remarkably improved; the composite activator (6mol / L NaOH solution + 0.4 mol / L Na2SiO3 solution) can effectively promote the depolymerization of aluminosilicate to form compact N-A-S-H gel, so that the strength and durability of the concrete are enhanced; the process is simple, the cost is low, the fly ash can be treated on a large scale, the use amount of cement is reduced, carbon emission is further reduced, and the method conforms to the development trend of green building materials.

The invention belongs to the technical field of building materials, and particularly relates to fan blade regenerated fiber-based high-solid-waste low-carbon concrete and a preparation method thereof, and the fan blade regenerated fiber-based high-solid-waste low-carbon concrete comprises the following raw materials by weight: 0.9-1.1 parts of an alkali-activated active precursor; 0.4 to 0.8 part of iron tailing sand; 0 to 1.1 parts of natural sand; 1.9 to 2.4 parts of recycled aggregate; 0.15 to 0.20 part of a composite alkali activator; 0.015 to 0.020 part of fan blade regenerated glass fiber; 0.001 to 0.003 part of a retarder; 0.35 to 0.45 part of water; wherein the alkali-activated active precursor is granulated blast furnace slag powder. The obtained concrete mixture is good in workability, the 28-day compressive strength reaches 40 MPa or above, the drying shrinkage rate is reduced by 30%-50% compared with that of traditional alkali-activated concrete, additional curing measures are not needed, the concrete mixture is particularly suitable for prefabricated parts such as curbs, sleepers and manhole covers, and a feasible technical path is provided for high-valued and large-scale utilization of bulk industrial solid waste.

The invention discloses an aramid fiber reinforced concrete material for a light sound barrier plate and a preparation method of the aramid fiber reinforced concrete material, and relates to the field of light building materials, and the aramid fiber reinforced concrete material is prepared from cement, fly ash, silica fume, quartz sand, light ceramsite, rubber fine sand, a water reducer, a fiber plasticizer, water and modified aramid fiber. The waste tire rubber powder is heated by using the aqueous alkali to prepare the fine rubber sand, so that exploitation of natural sand can be reduced, and energy conservation and emission reduction are realized. The interface bonding force between the modified aramid fiber and cement and other raw materials is enhanced, the acid and alkali resistance is high, the tensile strength of the concrete material can be improved, and the durability of the concrete performance under complex conditions is guaranteed.

The invention belongs to the technical field of concrete, and particularly provides anti-crack concrete and a preparation method thereof. The anti-crack concrete comprises the following components: cement, water, natural sand, broken stone, fly ash, a polycarboxylic acid water reducing agent, polypropylene fibers, montmorillonite and a core-shell anti-ultraviolet agent. The prepared concrete has the advantages of being high in ultraviolet resistance, excellent in crack resistance, high in durability and the like, and is suitable for outdoor scenes such as building outer walls, bridges and roads.

A method for generating hydrogen while depositing carbon material on sand includes inputting (1100) sand grains (310, 316) into a reaction chamber (210), wherein the sand grains (310, 316) are either natural sand grains (310) that include a natural metal containing substance (312) or enhanced sand (316) that includes an added metal containing substance (314); inputting (1102) a carbon source (214) into the reaction chamber (210) to react with the sand grains (310, 316); controlling (1104) a temperature inside the reaction chamber (210) to achieve catalytic decomposition of the carbon source (214), which results in generation of hydrogen (222) and solid carbon (224), which grows on the sand grains (310, 316) to form carbonaceous treated sand (420); and collecting (1106) the hydrogen (222) outside the reaction chamber (210).

The present invention provides a multi-solid waste-based artificial stone and a preparation method thereof, comprising the following steps: Step 1 is to uniformly mix iron tailings powder, fly ash, steel slag powder, and water, and then crush and roll to obtain spherical particles; Step 2 is to uniformly mix the spherical particles, steel slag powder, fly ash, cement, an activator, and a reinforcing agent with water to obtain a wet material; Step 3 is to press and shape the wet material, and cure it to obtain the multi-solid waste-based artificial stone. The multi-solid waste-based artificial stone of the present invention utilizes iron tailings, steel slag, and fly ash to prepare the artificial stone, which not only consumes a large amount of various solid wastes, reduces the amount of natural sand mined, reduces the amount of pollutant gas emissions generated by the sintering of cementitious materials, and improves the ecological environment; at the same time, after the action of the activator and reinforcing agent, the artificial stone can quickly undergo a hydration reaction in a short period of time to generate gel products such as silicic acid and aluminic acid, reduce the internal pore structure, and improve the density.

The invention provides a mortar coagulant with regenerated barium slag as a main raw material. The mortar coagulant comprises 50-60% of regenerated barium slag, 30-45% of natural clay, 5-15% of silica fume ash, 3-6% of latex powder, 0.5-1% of sodium carbonate, 0.2-0.5% of an alunite expanding agent and 0.1-0.5% of a polycarboxylate superplasticizer. The invention also provides an application of the mortar coagulant in concrete. The regenerated barium slag is used as a main raw material, and is combined with the natural clay, the silica fume, the latex powder, the sodium carbonate, the alunite expanding agent and the polycarboxylate superplasticizer to prepare the mortar coagulant, so that the additional value of the regenerated barium slag product is improved, and the resource utilization of the barium slag is realized. The mortar coagulant and the natural sand are mixed to manufacture the formed concrete, and the formed concrete can be applied to road brick manufacturing, crack grouting filling or mine hole backfilling, so that the problem of shortage of natural aggregate resources is solved, the ecological environment of barite production areas is protected, and the problems of stacking of urban wastes, land occupation, environmental pollution and the like are solved.

The invention belongs to the technical field of building materials, particularly relates to a preparation method of alkali activator activated fiber reinforced steel slag concrete, and aims to solve the problems that the steel slag concrete is low in early strength, insufficient in toughness and low in industrial solid waste synergistic utilization rate. According to the preparation method disclosed by the invention, a multi-source aggregate system is formed by the hot disintegration treated steel slag, the recycled coarse aggregate, the tailing sand and the natural sand; sodium silicate with the modulus of 1.0-1.5 and sodium carbonate / sodium hydroxide mixed alkali form a composite alkali activator; 1.0%-1.5% of corrugated steel fibers and 0.4%-0.6% of bunchy polypropylene fibers are doped to form a hybrid reinforcing system; the concrete is prepared through aggregate pre-wetting, staged stirring and a standard curing process. According to the method, the early strength and the fracture toughness can be remarkably improved, and efficient resource utilization of various industrial solid wastes is achieved.

The invention discloses a mortar fluidity evaluation model and a mix proportion inverse calculation method thereof, and belongs to the technical field of building materials.The method comprises the steps that aggregate comprehensive characteristic indexes are built by quantifying the stacking density, the specific surface area and grain shape correction parameters of aggregate; based on a cement paste volume balance principle, establishing a paste film thickness quantification model containing aggregate gap filling and surface wrapping; accurate evaluation of the fluidity is realized through a correlation model of the slurry film thickness and the mortar fluidity; and finally, based on the target fluidity, reversely deducing to obtain mortar mixing ratio parameters (water-cement ratio, mortar-sand ratio and the like) meeting the requirements. The method solves the problems that the traditional method cannot quantify the multi-feature coupling influence of the aggregate, the fluidity evaluation error is large, and the mix proportion design depends on experience, realizes the accurate prediction of the mortar fluidity and the efficient back-stepping of the mix proportion, is suitable for various aggregates such as natural sand, machine-made sand, shaping sand and the like, and provides a scientific basis for the mortar engineering application.

The invention relates to the technical field of building materials, and particularly discloses anti-crack bare concrete. The anti-cracking bare concrete is prepared from the following raw materials in parts by weight: 320 to 340 parts of cement, 48 to 52 parts of stone powder, 9 to 11 parts of silicon powder, 43 to 47 parts of an anti-cracking agent, 720 to 740 parts of natural sand, 730 to 750 parts of granite macadam with the particle size of 10 to 20 mm, 290 to 310 parts of granite macadam with the particle size of 5 to 10 mm, 150 to 160 parts of water and 9 to 11 parts of a polycarboxylate superplasticizer. Wherein the anti-cracking agent is prepared from the following raw materials: carbon nanofibers, phase change microcapsules, an ethylene-tetrafluoroethylene copolymer, hyperbranched polyester, a silane coupling agent and a nano silicon dioxide dispersion liquid. The anti-crack fair-faced concrete can be used for engineering scenes with requirements for apparent quality and durability, and has the advantages of long-acting crack resistance, high anti-permeability grade and excellent volume stability.

The utility model relates to the technical field of curbs, and discloses a high-quality sand-permeable horizontal curb which comprises a fabric layer, a base layer, an anti-collision buffer strip, an anti-freezing layer and a connecting rod, the fabric layer is fixed on the outer side of the base layer, the fabric layer is composed of modified epoxy resin and granite particles, an arc-shaped top is arranged at the top of the fabric layer, and the anti-collision buffer strip is arranged at the bottom of the arc-shaped top. An anti-freezing layer is fixed at the bottom of the base layer and is made of foam concrete, a plurality of first water-permeable holes are formed in the base layer, a plurality of second water-permeable holes are formed in the anti-freezing layer, the first water-permeable holes are aligned with the second water-permeable holes, and an anti-collision buffer strip is fixed on each of two side edges of the top of the fabric layer. The two ends of the connecting rod are each fixedly provided with two elastic blocking pieces, the elastic blocking pieces are made of spring steel, and the two ends of the base layer are each provided with a clamping groove used for allowing the connecting rod to be inserted. According to the utility model, mutual connection is stable; water permeability and drainage performance are good; the anti-collision performance and the anti-freezing performance are good.

The invention relates to the technical field of preparation of concrete, in particular to LC3-basalt fiber regenerated block concrete and a preparation method thereof.The preparation method comprises the following preparation steps that S1, LC3 cement, regenerated blocks, natural sand and gravel are poured into a stirrer to be subjected to uniform dry mixing, and a dry mixture is obtained; s2, adding water, a modified water reducer and a performance modifier into the dry mixture, performing wet mixing, uniformly scattering modified basalt fibers during wet mixing, and performing uniform stirring to obtain a wet mixture; and S3, pouring the wet mixture into a test mold, standing at room temperature, demolding, and curing for 26-28 days to obtain the LC3-basalt fiber regenerated block concrete. Through the synergistic effect of the modified basalt fiber, the modified water reducer and the performance modifier, the compressive strength, the strength retention rate after high temperature and the tensile strength of the concrete are remarkably improved, and chemical activation and densification after the regenerated block is added are achieved.