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1763 results about "River sand" patented technology

Bletilla striata rapid propagation seedling cultivation method

ActiveCN103270863ASolve the problem of quality degradationImprove germination rateSeed coating/dressingHorticultureRiver sandGermination
Provided is a bletilla striata rapid propagation seedling cultivation method. Fermented bark and a mixture of humus and river sand serve as a base material, the base material is laid on a seedling cultivation vessel, 1-2 layers of gauze is laid on the base material, water is poured to soak the base material, bletilla striata seeds are sown on the gauze, a transparent plastic film is utilized to wrap the seedling cultivation vessel, and the seedling cultivation vessel is placed in an artificial intelligent cultivation box to grow seedlings and strengthen the seedlings. The bletilla striata rapid propagation seedling cultivation method breaks through a traditional corm planting and cultivation mode of bletilla striata, the quality degeneration problem existing in vegetative propagation is resolved, and a new path is created for sexual propagation seedling cultivation of the bletilla striata genus of orchidaceae. The bletilla striata rapid propagation seedling cultivation method is simple in operation, low in cost and short in seedling cultivation period; the germination rate reaches up to 90%, the planting percent is 70%-80%, and good practical popularization significance is provided for large-scale propagation seedling cultivation of the bletilla striata.
Owner:SHAANXI NORMAL UNIV

Reactive powder concrete for reinforcing buildings as well as preparation method and construction method thereof

The invention discloses a reactive powder concrete for reinforcing buildings as well as a preparation method and the construction method thereof. The reactive powder concrete comprises the following raw material constituents in parts by weight: 50 to 80 parts of cement, 15 to 40 parts of fly ash microsphere, 5 to 13 parts of silica fume, 35 to 80 parts of river sand, 20 to 65 parts of quartz sand, 10 to 20 parts of water, 10 to 30 parts of steel fibre and 1 to 2 parts of chemical additive. The reactive powder concrete has the advantages of good fluidity, strong plasticity, good cohesive property with an existing structure, similar linear expansion coefficient with an existing concrete structure, high strength, wide raw material source, reliable technology, durable service, low in cost and simple construction technology. In addition, the RPC material poured at later stage and the existing structure are closely integrated as a whole, resulting from contraction performance of the reactive powder concrete during the process of hardening, and the integrity of the structure is enhanced; all that is needed is to carry out conventional maintenance on the reactive powder concrete after forming, the prospective reinforcement effect can be achieved, and curing condition is the same as that of the normal premixed concrete.
Owner:CHINA CONSTR THIRD ENG BUREAU GRP CO LTD +1

Phosphorus slag powder doped dry powdered anti-crack mortar

The invention belongs to the technical field of building materials, and in particular relates to a phosphorus slag powder doped dry powdered anti-crack mortar. The phosphorus slag powder doped dry powdered anti-crack mortar is prepared from ordinary Portland cement, river sand, phosphorus slag powder, slag powder, slag powder activity excitant, cellulose ether, polypropylene fiber, wood fiber, modified attapulgite, a defoaming agent and a water reducing agent. In the invention, the average particle size of the phosphorus slag powder is 30-40 nu m, the specific surface area measured by nitrogen adsorption is 350-400 m<2>/kg, and the mass coefficient K is 1.3-1.4, therefore, the anti-crack mortar has a certain potential volcanic ash activity; the dry powdered anti-crack mortar disclosed by the invention is convenient to operate and easy to control, can be used just after being added with water and stirred on the scene, and has the characteristics of good fluidity, good water retention, high bonding strength, good waterproof and water impermeable effects, strong crack resistance, and the like. A product of the anti-crack mortar disclosed by the invention both can be applied to the bonding and plastering of polystyrene foam boards for external wall insulation and extruded sheets, and also can be applied to occasions such as the repair of easily cracked parts, the refurbishment of ceramic tiles for old walls, and the like. According to the invention, phosphorus slag powder can be effectively used, the added value of phosphorus slag powder can be improved, and social and environmental benefits can be improved; the production cost of the anti-crack mortar can be lowered, and the economic benefit can be improved.
Owner:TONGJI UNIV

Artificial reef preparation with metallurgy slag as principal raw material

The invention relates to a method for preparing an artificial fishing rock by using metallurgy residues as main materials, which belongs to the technical field of metallurgy residues treatment. The method is characterized by comprising the following steps: firstly, sieving and grading sea sand or river sand; secondly, mixing and grinding 0 to 20 percent of the obtained sand with the particle diameter of less than 5 millimeters with 10 to 80 percent of steel slag, 0 to 80 percent of mine refuse and 10 to 70 percent of cement clinker until the specific surface area is more than 350 square meters per kilogram; thirdly, mixing 20 to 70 percent of the mixture with 20 to 50 percent of the sieved coarse sand with the particle diameter of more than 5 millimeters and 0 to 40 percent of stones; and fourthly, obtaining the concrete artificial fishing rock with high and strong performance after high temperature maintenance. The artificial fishing rock has the advantages that the artificial fishing rock with high and strong performance is prepared by using the metallurgy residues as the main materials to remarkably reduce the preparation cost of the fishing rock, and the living environment for the aquatic lives around the fishing rock is fundamentally improved because the pH value of the concrete pore solution of the prepared fishing rock is close to that of sea water.
Owner:SHOUGANG CORPORATION

Low shrinkage anti-cracking C60 grade self-compacting bridge tower concrete based on internal curing, shrinkage compensating and toughening, and preparation method thereof

ActiveCN105130335ACelluloseFiber
The present invention discloses a low shrinkage anti-cracking C60 grade self-compacting bridge tower concrete based on internal curing, shrinkage compensating and toughening, wherein the low shrinkage anti-cracking C60 grade self-compacting bridge tower concrete is prepared from the following raw materials: cement, fly ash, mine powder, an expander, an AN-ICA internal curing agent, crushed stone, river sand, polyacrylonitrile fibers, micro-scale modified degreasing cotton cellulose, a cement slurry microstructure regulation agent, water and an ultra-dispersed water-reducing and shrinkage-reducing superplastic admixture. According to the present invention, the initial slump is more than or equal to 230 mm, the expansion degree is more than or equal to 630 mm, the 28 d compressive strength is more than or equal to 70 MPa, the 28 d splitting tensile strength is more than or equal to 5.8 MPa, the toughness index I5 is more than or equal to 3.0, the 28 d self-shrinkage is less than 100*10<-6>, the 28 d dry shrinkage rate is less than 150*10<-6>, the carbonization grade achieves T-IV, the anti-cracking grade achieves L-V, the product has characteristics of excellent mechanical property, excellent cracking resistance and excellent durability, and the difficult problems of high cement and cementing material material consumption, large shrinkage and easy cracking of the bridge tower concrete at the current stage can be solved.
Owner:WUHAN UNIV OF TECH +2

Baking-free hollow thermal insulation blocks and preparation method thereof

The invention discloses baking-free hollow thermal insulation blocks and a preparation method thereof. The baking-free hollow thermal insulation blocks are characterized by being prepared from the following raw materials in part by weight: 100 to 115 parts of waste ceramsite, 110 to 130 parts of cement, 90 to 100 parts of flyash, 23 to 27 parts of pearlstone, 190 to 210 parts of mountain flour, 170 to 190 parts of rive stone, 170 to 190 parts of river sand and 39 to 41 parts of water. Waste ceramic is adopted to be prepared into the waste ceramsite to replace partial natural sandstone, and the flyash replaces partial natural sand and cement, so that the damage to natural resources is reduced. The pearlstone is adopted to serve as fine aggregate of concrete to regulate the porosity of mortar and improve construction workability. The product has good mechanical properties and durability, also has good thermal insulation property, improves the thermal insulation capacity of buildings, and is suitable for various thermal insulation projects. The use and construction of the baking-free hollow thermal insulation blocks are same as that of a common block construction method. The technical scheme has the advantages that: the process is easy to operate, the raw materials are readily available and cheap, the production cost is lower, and the economic and social benefits are better.
Owner:HUALAN DESIGN GRP CO LTD

Method for producing nutritive soil for practical and highly efficient soilless flower growth

ActiveCN102696462ASolve the problems of unfavorable growth and high production costRetain nutrientsAgriculture gas emission reductionCultivating equipmentsRare-earth elementAdditive ingredient
The invention discloses a method for producing nutritive soil for practical and highly efficient soilless flower growth, belonging to the agriculture flower cultivation technology field, which is characterized by taking zeolite powder, medical stone powder and perlite powder as main nutritive components, taking river sand and sawdust as auxiliary raw materials, after scientifically biological fermentation of the sawdust, producing the soil which can maintain much nutritive ingredient. A method for producing the soil includes: selecting an oblique lining grey green zeolite powder which mainly comprises silicon dioxide, aluminium oxide or the like, crushing and preparing stock with grain size of 0.2-1mm, and the pH value of 5.5-7.0; selecting the medical stone which mainly comprises the silicon dioxide, aluminium oxide, potassium oxide, sodium oxide, magnesium oxide or the like, mainly using trace elements and thirteen rare earth elements and anti-solidification effect, and crushing and preparing the stock with the grain size of 0.2-1mm and the pH value of 5.5-7.0; selecting large grain gardening perlite containing 100% pure inorganic cultivation medium and having stable physicochemical index, crushing and preparing the stock with the grain size of 0.2-1mm; selecting the sawdust after scientifically biological fermentation; selecting high quality of river sand, exposing under the sun for 1-2 days in a high temperature and preparing the stock; and fully stirring and mixing the stocks of zeolite powder, the medical stone powder, the perlite powder, the sawdust, and the river sand according to a preparation ratio of 20%, performing spray and sterilization treatment, and packaging into a product.
Owner:郭茂青

Succulent plant planting soil formula

The invention relates to a succulent plant planting soil formula. The succulent plant planting soil formula comprises the following components in part by weight: 20-30 parts of peat, 5-10 parts of vermiculite, 5-10 parts of coco coir, 1-5 parts of grass carbon ash and 20-30 parts of particles. The particles comprise the following components in part by weight: 5-10 parts of akamada, 5-7 parts of medical stone, 5-7 parts of river sand, 3 parts of zeolite, 3 parts of siliceousearth, 1 part of slow-release fertilizer and 0.01-0.1 part of carbendazim. The diameters of the particles are 2-6mm. The peat serves as a main planting medium of the planting soil formula, and is mixed with the vermiculite and the coco coir, water-retaining property and mellowness of the planting soil formula are improved, water permeability and breathability of the planting soil are improved by the particles, the grass carbon ash is used for adjusting power of hydrogen of the planting soil, by the slow-release fertilizer, the planting soil has low-concentration fertility in a long-acting manner, in conclusion, requirements of growth of succulent plants can be met by the succulent plant planting soil formula, and the succulent plant planting soil formula is breathable, cannot be hardened easily, is good in water draining effect and water holding effect, and is suitable to be popularized widely.
Owner:NINGBO RUIER ECOLOGICAL GARDEN CO LTD
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