9 results about "River sand" patented technology

The invention discloses repairing mortar for a concrete floor, and relates to the technical field of building materials. The preparation of the repairing mortar comprises the steps that silicate cement and quartz sand or river sand are adopted as basic materials to be matched with a certain amount of sulphur aluminate cement, and various functional auxiliary materials such as coarse whiting powder, an expansive agent, a water-reducing agent, a water retaining agent, a waterproof agent, a retarding agent, an antifoaming agent, redispersion rubber powder, engineering fibers and inorganic pigments are added. According to the invention, the silicate cement and the sulphur aluminate cement are matched for use, so that the material cost is reduced, waterproofness and durability of the repairing mortar are increased, the service life is prolonged, the viscosity of the repairing mortar is reduced, the construction performance is improved, and the integrity of the construction surface is improved; and meanwhile, the inorganic pigments are added, accordingly, the attractiveness of the repairing mortar is improved, and the repairing mortar can be used for repairing thin layers and holes.

The invention relates to the technical field of soil remediation, in particular to a tea planting land soil remediation agent and a preparation method thereof. The tea planting land soil remediation agent is a semi-wet and semi-dry powdery mixture and is prepared from substances in parts by weight as follows: 10-30 parts of livestock and poultry excrement, 20-32 parts of a biomass material, 5-12 parts of humic acid, 5-15 parts of river sand, 3.2-9.5 parts of bentonite, 30-45 parts of charcoal, 2-12 parts of diatomite, 2-8 parts of a plant nutrient solution and 2-12 parts of starch. The soil remediation agent is uniformly mixed with a mixed fermentation bacterium solution in the volume ratio being 1:(0.1-0.5) before use, and the mixed fermentation bacterium solution contains nitrogen-fixing bacteria, nitrobacteria and saprophytic bacteria; the soil remediation agent contains rich mixed fermentation bacteria, has significant effects on improving soil hardening and character worsening caused by overuse of nitrogen, phosphorus and potassium, makes soil recover to the original ecological structure and promotes the soil structure to recover to the sufficient fertility state more quickly in combination with multiple nutrients contained in the soil remediation agent.

The invention discloses an energy-saving and environment-friendly high-strength epoxy resin concrete material, and particularly relates to the technical field of build concrete. According to the energy-saving and environment-friendly high-strength epoxy resin concrete material, main materials are prepared from, by weight, 70-100 parts of epoxy resin, 30-40 parts of a basic material, 8-12 parts ofriver sand and 10-15 parts of asbestos fibers; auxiliary materials are prepared from, by weight, 10-12 parts of corn starch, 8-10 parts of a reactive diluent, 2-4 parts of an antifoaming agent, 15-25parts of a curing agent and 6-8 parts of a toughening agent; the base material is prepared from coal gangue and limestone through mixing. According to the energy-saving and environment-friendly high-strength epoxy resin concrete material, the coal gangue and the river sand are smashed for replacing cement, the production cost is low, energy saving and environment protection are facilitated, the water absorption effect of the limestone is good, the viscosity of the material is increased through the reactive diluent and the corn starch, the antifoaming agent is added, shocking antifoaming is conducted through a vibration machine, the material is even in texture, pores are shrunk, the hardness and the strength of the concrete material are improved through ingredients of the calcium carbonateand microcrystals of the river sand, and the toughness and the resistance of concrete are improved through the asbestos fibers and the toughening agent.

The invention relates to a treatment method of Acer mandshuricum Maxim. for seedling emergence in a dormancy-breaking year. The invention aims to solve the problems in the prior art that after Acer mandshuricum Maxim. seeds are sown, the seeds need to stay in nurseries for winter, thus the seedling raising time is long, the seedling emergence rate is low, and the management and protection costs are high. The treatment method comprises the following steps: (1) selecting seeds, and soaking the seeds repeatedly; (2) conducting disinfection and conducting cleaning; (3) mixing the cleaned seeds and wet river sand in proportion, and placing the mixture for 7-10 days at a temperature of 10-15 DEG C; (4) conducting stratification treatment; (5) conducting freezing, conducting unfreezing after freezing, and storing the unfrozen seeds in a cellar; and (6) placing the seeds and the river sand which are stored in the cellar to outdoor shady places for vernalization, and sieving the river sand out of the seeds for seed sowing. The treatment method provided in the invention breaks the comprehensive dormancy of the Acer mandshuricum Maxim. seeds, seedlings can normally emerge in the current year after sowing, and the seedling emergence is ordered, the seedling emergence rate can reach 82% or more, seedling raising time is shortened, the seedling survival rate is improved, the management and protection costs are reduced, and the method is suitable for breaking dormancy of the Acer mandshuricum Maxim. seeds.

The invention discloses an energy-saving phase-transformation anti-cracking polymer special mortar comprising the following components in parts by weight: 20-40 parts of cement, 40-60 parts of river sand, 30-50 parts of fly ash, 3-8 parts of a carboxyl modified butyl benzene latex, 4-10 parts of an epoxy resin modified styrene-acrylic latex, 10-18 parts of paraffin, 10-20 parts of expanded perlite, 3-5 parts of a polypropylene fiber, 1-2 parts of a water reducing agent, 0.5-1.2 parts of a set retarder, 2-3 parts of a silane coupling agent, and 40-60 parts of deionized water. The invention also discloses a preparation method of the polymer special mortar. The polymer special mortar has the advantages of good anti-cracking performance, excellent water resistance, excellent high-temperature resistance, good mechanical properties, low preparation cost and no harm to the environment.

The invention discloses a sleeve valve pipe for reinforcing the pit bottom of a water-rich pebble bed deep foundation pit and a construction process, and the sleeve valve pipe is used for reinforcingthe pit bottom of the water-rich pebble bed deep foundation pit, preventing the pit bottom from bulging and improving the stability of the foundation pit. The sleeve valve pipe is characterized by comprising a sleeve valve pipe body (1), a grouting pipe (2), grouting liquid (7), a manual sand filling layer (6), a drainage plate (5), a grout stopping plug (3), a connector (8), a rubber raft (4) anda conical plug (9). The construction process comprises the following steps: after surveying and setting out, positioning a drilling machine in place, drilling holes, preparing sand, installing the sleeve valve pipe, constructing a manual sand filling layer, conducting grouting in sections and sealing holes. The sleeve valve pipe is fixed through manual sand filling, river sand in the manual sandfilling layer can be flushed into a pebble stratum through high grouting pressure and grouting liquid and is effectively packed into gaps of the pebble stratum after being mixed with the grouting liquid, the gradation of the pebble stratum is changed, a better grouting effect is achieved, the manufacturing cost is low, and economic benefits are high.

The invention discloses a resource utilization method of dehydrated and desilted bottom mud. The resource utilization method comprises the following steps: drying the dehydrated and desilted bottom mud until the water content is less than or equal to 25 percent, crushing the obtained dried and desilted bottom mud until the particle size is less than or equal to 1.0 mm, sieving, and screening out particles with different particle sizes, wherein the particles with different particle sizes can be used as a clay raw material or a gravel raw material, and therefore, resource utilization of the dehydrated and desilted bottom mud is realized. According to the resource utilization method of the dehydrated and desilted bottom mud, the dehydrated and desilted bottom mud is prepared into particles with different particle sizes, resource utilization of the dehydrated and desilted bottom mud can be achieved, meanwhile, the problem of shortage of river sand resources and clay resources can be solved, and the resource utilization method has the advantages of being easy to operate, low in cost, high in economic benefit and the like; and the prepared particles with different particle sizes have wide application markets, high use value and good application prospects.

The invention discloses single-size-fraction coal gangue self-compacting concrete. The single-size-fraction coal gangue self-compacting concrete comprises he following components in parts by weight: 592 to 761 parts of natural aggregate, 85 to 254 parts of coal gangue, 700 to 800 parts of river sand, 100 to 130 parts of fly ash, 400 to 500 parts of cement, 1 to 3 parts of a water reducing agent and 190 to 210 parts of water, wherein the coal gangue is single-size-fraction coal gangue with a particle size ranging from 10 mm to 20 mm. According to the single-size-fraction coal gangue self-compacting concrete provided by the invention, the adopted single-size-fraction coal gangue aggregate is convenient to screen compared with the existing continuous-grade coal gangue aggregate, so preparation cost is greatly reduced; the characteristics of large porosity and strong water absorption of the crushed coal gangue are utilized, and the coal gangue is used as an internal curing material, so the later hydration of the concrete is promoted, and the strength of the concrete is favorably improved; and the coal gangue is used for replacing a part of natural aggregate, so the problem of environmental pollution is effectively solved, the problem of scarcity of natural coarse aggregate in China is overcome, and high economic benefits are achieved.

The invention discloses a high-strength material for manufacturing sanitary wares and a manufacturing method thereof. The material is prepared from the following components (by weight): 100 parts of cement, 100-150 parts of river sand, 20-50 parts of calcium carbonate powder, 10-25 parts of silicon powder, 1-3 parts of a pigment, 3-20 parts of fibers, 3-5 parts of a high-performance water reducer,and 15-25 parts of water. The invention has the following advantages: the sanitary wares are solid and durable in use, crack-resistant, fine and natural; and compressive strength of the product is greater than 80 MPa, bending strength is greater than 6 MPa, and water absorption is less than 2%. Through optimized combination of the common building materials, the material of the invention can become a high-quality material with low energy consumption, low cost, low pollution and high performance for the sanitary ware product.