478 results about "Volcanic ash" patented technology

A rapidly dehydrating lost circulation material (LCM) composition is provided. The LCM composition may include a carrier fluid, volcanic ash, a viscosifier, and date tree rachis fibers. The carrier fluid may be water and the viscosifier may be a cellulosic microfiber. The LCM composition may form a rapidly dehydrating loss control slurry (RDLCS). The LCM composition may be formed by mixing the carrier fluid, the volcanic ash, the viscosifier, and the date tree rachis fibers in a mixer to form a homogenous mixture. Methods of lost circulation control and manufacture of a rapidly dehydrating LCM are also provided.

A CO₂ control device and method for capturing CO₂ from fluid flow, including: a flow-through apparatus and an CO₂ absorbing filter treated with an alkaline material which is housed within the flow-through apparatus. The flow-through apparatus receives fluid flow and the CO₂ from the fluid flow is absorbed by the CO₂ absorbing filter. The absorbed CO₂ is converted into CaCO₃ which is combined with volcanic ash to form a useful cement material.

The invention discloses a method for preparing electrolytic manganese slag ecological cement, and belongs to the field of building materials and environment protection. The cement is characterized by consisting of calcined electrolytic manganese slag, blast furnace slag, a clinker, gypsum and an additive. The method comprises the following steps of: crushing the electrolytic manganese slag and then calcining the crushed slag at the temperature of between 500 and 900 DEG C, wherein the activity of the slag is increased to be close to that of fly ash from zero activity of volcanic ash; and grinding the blast furnace slag, the clinker, the fly ash or steel slag, the gypsum and the additive together or respectively according to a certain proportion and uniformly mixing the materials to prepare the electrolytic manganese slag ecological cement, wherein the amount of the calcined electrolytic manganese slag in the mixture is 10 to 50 percent. The method has the advantages of circularly utilizing a great amount of accumulated electrolytic manganese slag on a large scale and relieving serious damage of the electrolytic manganese slag to the environment, along with simple process, high product quality, low production cost and high economic, environmental and social benefit.

This invention relates to filterable composite adsorbents comprising one or more adsorbent components and one or more filtration components, and methods for preparing and using same. More particularly, this invention pertains to filterable composite adsorbents and filterable composite adsorbent products which are suitable for use in filtration applications, and which comprise one or more microparticulate or colloidal adsorbent components selected from the group consisting of silica gel, fumed silica, neutral clay, alkaline clay, zeolite, solid catalyst, alumina, adsorbent polymer, alkaline earth silicate hydrate, and combinations thereof, which bear the property of adsorption, which are intimately bound to one or more functional filtration components selected from the group consisting of biogenic silica (e.g., diatomite, rice hull ash, sponge spicules), natural glass (e.g., expanded perlite, pumice, expanded pumice, pumicite, expanded obsidian, expanded volcanic ash), buoyant glass, buoyant polymer, cellulose, and combinations thereof, which bear a distinguishing porous and intricate structure and buoyancy suitable for filtration.

The invention discloses a seawater corrosion resisting mineral additive for concrete, and a preparation method thereof. The seawater corrosion resisting mineral additive for concrete comprises components of, by weight: 15 to 40% of calcium sulphoaluminate mineral, 10 to 40% of anhydrite, 10 to 30% of calcined diatomite, 10 to 30% of natural volcanic ash, 5 to 25% of quartz powder, and 2 to 8% of an auxiliary agent. The seawater corrosion resisting mineral additive provided by the invention has good corrosion resisting capacities against corrosion media such as Na2SO4, NaCl, and MgSO4. The corrosion resisting coefficient is higher than 0.9. Therefore, the mineral additive can be used for preparing high-strength high-performance seawater corrosion resisting concrete, or underwater concrete placed in corrosion media. The mineral additive can also be used in water conservancy and hydropower projects for improving the corrosion medium resisting performances of buildings, wherein in the corrosion media comprise sulfate, chloridion, and the like. With the mineral additive, cracks of buildings can be reduced or eliminated, and the service lives of the buildings can be prolonged.

The invention relates to an experimental method and an experimental device for determinating volcanic gas-water relative permeability. Through experimental steps of preparing a volcanic core, measuring permeability and porosity of a rock sample gas, exerting a confining pressure and performing rock sample gas water displacement, a relative permeability curve when gas saturation increases and water saturation decreases in the volcanic core is determinated by a non-steady-state method.

This invention relates to a formulation with the addition of low density additives of volcanic ash, hollow ceramic microspheres or a combination of microspheres and volcanic ash or other low density additives into cementitious cellulose fiber reinforced building materials. This formulation is advantageously lightweight or low density compared as compared to current fiber cement products without the increased moisture expansion and freeze-thaw degradation usually associated with the addition of lightweight inorganic materials to fiber cement mixes. The low density additives also give the material improved thermal dimensional stability.

The invention is a rice hull burning device and the nano structural SiO2 rice hull ashes produced by it, and the device includes a burning container, where the bottom board is distributed with many small hole, the inside of the container is distributed with heat exchange water pipes, it regulates the distribution density of these water pipes to control the burning temperature under 600 deg.C in the rice hulls, thus able to ensure the produced rice hull ashes are nano structural rice hull ashes, using the produced heat energy in burning course, and simultaneously solving the problem of limitation to the bulk of a rice hull pile; the produced nano structural SiO2 rice hull ashes contain many about 50 nm-sized SiO2 particles loosely bound together and many holes, where the content of SiO2 exceeds 90%, and has superhigh activity of volcanic ash and strong reinforcement action on ordinary concrete and high-strength concrete, and when the quantity of replacing the cement is 5-20%, can heighten the pressive strength of high-strength concrete by above 10MPa.

The invention discloses an aminosilane-modified ecological nano cementing material and a preparation method thereof. According to the aminosilane-modified ecological nano cementing material, the ratio of water to ash is 0.15-0.35; except the water, the cementing material is prepared from the following raw materials in percentage by mass: 35%-55% of cement, 3%-11% of an ecological nano material, 10%-20% of limestone powder, 30%-40% of flyash, 0.013%-0.024% of an aminosilane modification agent and 0.2%-2% of a water reducer. The ecological nano material silicon powder is pre-dispersed, so that the dispersibility of the ecological nano material in a cement-based material is greatly improved; the micro-aggregate effect, the filling effect and the volcanic ash effect of the ecological nano material are more fully exerted; the properties such as microstructure, the physical and mechanical properties and the durability and the like of the cementing material are more effectively improved.

Volcanic ash, which becomes airborne during a volcanic eruption, can be deposited more than a thousand miles from the eruption site. Currently, many volcanic ash deposits are virtually unused. The method and product of the present invention converts this unused volcanic ash material, as well as furnace expanded volcanic ash, or the ash expanded and crushed, into a relatively dust free product with numerous new end applications.

Onboard systems and methods for detection of airborne volcanic ash. One or more cameras are added to an aircraft. Each camera is configured to view a volume of air illuminated by a standard aircraft light, such as a strobe warning light (e.g., located on a wing tip) or a forward-facing landing light (e.g., located in the nose). Each camera is connected to a data processor. When diffuse volcanic ash is present, it scatters light transmitted from the standard aircraft light. Each camera converts impinging backscattered light into digital data which is sent to the processor. The processor processes the data from the camera or cameras to derive a measurement of the backscattered light and issues an alert when the amount and type of backscatter are compatible with the presence of volcanic ash.

Onboard systems and methods for early detection that an aircraft has flown into a volcanic ash plume embedded within a water vapor cloud having a concentration of a volcanic ash which would be dangerous to an aircraft. The detection method generally comprises the steps of measuring the infrared emission characteristics of a jet engine exhaust and generating a detection signal when the intensity of infrared emissions at or near a spectral peak wavelength exceeds a threshold.

Drilling mud compositions and related methods are provided as embodiments of the present invention. The drilling mud compositions are water-based and contain volcanic ash. The compositions and methods of the present invention provide improved properties relative to tolerance of high salt content, cement, lime, and temperatures.

The invention discloses a composite admixture for improving durability of common concrete by improving gradation. The composite admixture is prepared from the following raw materials in parts by weight: 150-250 parts of fly ash, 200-350 parts of limestone powder, 50-250 parts of slag powder, 50-250 parts of ceramic powder, 50-250 parts of volcanic ash and 0-50 parts of gypsum. By improving the gradation of the fly ash, the limestone powder, the slag powder, the ceramic powder and the volcanic ash, proper fluidity can be provided for the concrete, the porosity is reduced, the compactness of a system can be improved, and the use amount of water can be reduced, so that the durability of the concrete is further improved. Physical/chemical super-superposition effects can be generated through compounding and excitation of various admixtures, and the comprehensive effect of the mineral admixtures is superior to the sum of the individual use of the mineral admixtures. By using the mineral admixture compounded according to a proper proportion, the pore structure of the concrete is improved, the compactness of the concrete is improved, and the durability of the concrete is improved.

The invention relates to high-performance modified asphalt. The high-performance modified asphalt is prepared from the following ingredients: asphalt, thermoplastic rubber, glue powder, an additive and a stabilizer, wherein the asphalt is heavy-traffic-road petroleum asphalt or cycloalkyl petroleum asphalt, the thermoplastic rubber is styrene-isoprene-styrene block copolymer (SIS) or styrene-butadiene-styrene (SBS), the glue powder is rubber powder which is formed through grinding waste and old tires prepared through normal temperature methods, the additive is volcanic ash or silicon powder or fly ash, and the stabilizer is rosin or rosin resin. The high-performance modified asphalt has better high-temperature stability, the softening point capable of reaching above 80 DEG C, better low-temperature stability, the brittle point being below -30 DEG C, relatively high elasticity, the elasticity recovery reaching over 90% and better adhesivity reaching over the level IV. The waste of energy and resources is reduced through using industrial and domestic wastes as much as possible, so that the preparation method has the advantages of energy saving, emission reduction, simple production process and low cost.

The invention relates to radix pseudostellariae cultivating soil with DDGS as the raw material. The radix pseudostellariae cultivating soil is prepared from, by mass, 50-60% of DDGS, 20-30% of volcanic ash powder, 5-10% of pine bark and the balance bran. According to the radix pseudostellariae cultivating soil with the DDGS as the raw material, on one hand, recycling and utilization of alcohol lees are facilitated; on the other hand, due to the fact that the DDGS is rich in crude protein, crude fibers, crude fat and mineral substances such as calcium, phosphorus, potassium, sodium and selenium, and rich nutrition can promote growth of radix pseudostellariae and raise the effective ingredient content of the radix pseudostellariae; meanwhile, the four types of raw materials are matched and used, acidity and alkalinity and porosity can be integrated, cultivating soil maintains loose, and thus a lot of work in the excavation process through a traditional radix pseudostellariae plantation technology can be omitted.

The invention discloses permeable concrete. The permeable concrete is prepared from, by weight, 250-300 parts of cement, 10-15 parts of coal ash, 6.32-9.68 parts of volcanic ash, 18-25 parts of carbide slag, 15-24 parts of quartz sand, 2.2-5.3 parts of triethanolamine, 1.3-2.7 parts of sodium sulfate, 2.5-3.6 parts of a water reducing agent, 0.8-1.7 parts of a retarder, 3.2-4.8 parts of a foaming agent and 30-35 parts of water. The permeable concrete is good in construction workability, large in porosity, good in water permeability, good in abrasive resistance, high in compressive strength and bending strength and good in anti-frost property.

The invention discloses a method using electrolytic manganese slag to manufacture an active mixed material. According to the preparation method, an activator and a reducing agent are added into electrolytic manganese slag according to a certain ratio so as to carry out physical and chemical reactions at a high temperature; the reaction products are calcined, and finally the calcined clinker is cooled to obtain the active mixed material. The active mixed material has the properties of volcanic ash, and can be used as the active mixing material in cement industry and composite blending material in commercial concrete industry. A large amount of acid leached slag discharged by electrolytic manganese plants can be used to produce the active mixed material, the environmental pollution generated by harmful components in electrolytic manganese slag is radically eliminated, the clean production of electrolytic manganese can be realized, the pollution is comprehensively controlled, and high economic benefit and environment protection benefit are generated.