博文

Basalt Rebar – the alternative to steel and fiberglass

图片
  Basalt rebar reinforcement is an alternative to steel and fiberglass for reinforcing concrete. Made from volcanic rock, basalt rebar is tougher and stronger than steel with a higher tensile strength. Much lighter than steel, 89% percent in fact! One man can easily lift a 100 meter / 328 foot coil of 10 mm basalt rebar.     Features of basalt rebar Basalt rebar  is naturally resistant to alkali, rust and acids. Moisture penetration from concrete does not spall. Needs no special coating like fiberglass rods.   Basalt rebar has the same thermal coefficient expansion as concrete! Allowing thinner, lighter panels and decks, basalt rebar reduces the thickness and spacing between the rods and the concrete and surface. Much more flexible design! Smaller rods allow for more critical spacing and designs.   Basalt rebar is easily cut to length with regular tools. Basalt rebar does not conduct electricity or induce fields when exposed to RF energy, great for MRI or data buildings. Basalt rebar r
发表评论
阅读全文

Fall sulfur application: Selecting the best product

图片
  Sulfur has become an important crop nutrient applied to corn fields across Minnesota. Recent research has shown a benefit from applying sulfur in fields low in organic matter and in high residue situations where mineralization and release of sulfate sulfur from organic matter are limited. What can make sulfur application challenging is that the form of sulfur available for crop uptake is sulfate. Sulfate is an anion and, like nitrate, can leach deep in the soil profile where crop roots cannot reach. The addition of sulfur fertilizers to fall phosphorus and potassium applications leads to questions about what the best form of sulfur is. Choosing the right form is critical to ensure crops are not short of this necessary nutrient early in the growing season. Commercial sulfur fertilizer   sources include either elemental or sulfate forms of sulfur. The difference between the two is that sulfate sulfur forms, such as gypsum or ammonium sulfate, contain readily available sulfur, while ele
发表评论
阅读全文

What is Urea 46?

图片
  In common with most commercial nitrogen fertilizers, urea is manufactured from anhydrous ammonia (NH3). The high analysis of urea — 46% N — is the main reason for the low cost of this form of nitrogen fertilizer. Freight costs and storage and handling are all lower than with lower analysis fertilizers such as ammonium nitrate (34-0-0) or ammonium sulfate (21-0-0). Urea 46% Nitrogen a white crystalline solid containing 46% nitrogen, is widely used in the agricultural industry as an animal feed additive and fertilizer.  Fertilizer urea   can be purchased as prills or as a granulated material. In the past, it was usually produced by dropping liquid urea from a “ prilling tower ” while drying the product. The prilled formed a smaller and softer substance than other materials commonly used in fertilizer blends. Today, though, considerable urea is manufactured as granules. Granules are larger, harder, and more resistant to moisture. As a result, granulated urea has become a more suitable m
发表评论
阅读全文

What is Urea 46?

图片
  In common with most commercial nitrogen fertilizers, urea is manufactured from anhydrous ammonia (NH3). The high analysis of urea — 46% N — is the main reason for the low cost of this form of nitrogen fertilizer. Freight costs and storage and handling are all lower than with lower analysis fertilizers such as ammonium nitrate (34-0-0) or ammonium sulfate (21-0-0). Urea 46% Nitrogen a white crystalline solid containing 46% nitrogen, is widely used in the agricultural industry as an animal feed additive and fertilizer.  Fertilizer urea   can be purchased as prills or as a granulated material. In the past, it was usually produced by dropping liquid urea from a “ prilling tower ” while drying the product. The prilled formed a smaller and softer substance than other materials commonly used in fertilizer blends. Today, though, considerable urea is manufactured as granules. Granules are larger, harder, and more resistant to moisture. As a result, granulated urea has become a more suitable m
发表评论
阅读全文

Application of Basalt Fiber Reinforcing Bar in Construction Engineering

图片
  Application of basalt fiber rebar   in construction engineering, and comparison of rebar 1. Physical properties of basalt fiber composite bars 1. Density: The density of fiber composite bars is between 1.9-2.1g/cm ³ , which is only 1/4 of that of steel bars. 2. Thermal expansion coefficient: The longitudinal and lateral thermal expansion coefficients of fiber-reinforced composite bars are different, mainly depending on the type of fiber, resin and fiber volume ratio. The longitudinal coefficient of thermal expansion is affected by the fiber properties, while the transverse coefficient is mainly affected by the resin. The table below lists the transverse and longitudinal coefficients of thermal expansion of steel bars and different types of fiber composite bars. 2. Application of Basalt Fiber Reinforcing Bar   in engineering 2.1 Application of underground engineering Underground engineering refers to: underground parking lots, underground pedestrian passages, subway stations, tunnels,
发表评论
阅读全文

Exposure to printing inks is grossly underestimated

图片
  Frequent detection of the photoinitiator isopropylthioxant (ITX) in baby milk, dairy products and cloudy fruit juices packaged in beverage cartons highlights the need for more regular screening of food products packaged in paper and cardboard. UV filters have been associated with exposure to sensitization, endocrine activity and cancer. In this study, researchers from the Technical University of Dresden (TU Dresden) and the German Food Law Enforcement Agency of Baden-Württemberg (CVUA) analyzed 310 packaging materials containing dry food products for the presence of 11 photoinitiators and amine synergists. Ultraviolet (UV) filters such as ITX and   benzophenone (BP) , previously found in food, are used in UV-curable printing inks and varnishes. Some UV filters such as BP require amine synergists to improve curing. BP has shown a positive response in uterine nutrition tests for estrogenic activity and is classified as a high yield chemical. Printing inks are currently not specifically
发表评论
阅读全文

Synthesis and Application of Benzophenone

图片
  Benzophenone is an organic compound with the molecular formula (C6H5)2C=O, which can be abbreviated as Ph2CO. Diphenyl ketone, as the nucleus of diaryl ketone, is an important synthetic intermediate in organic chemistry. use Benzophenone can be used as a photoinitiator for UV curing of varnishes in the ink, imaging and printing industries. Diphenyl ketone prevents the damaging effects of UV light on fragrances or colorants in products such as perfumes and soaps. It can also be added to plastic bags as a UV shielding agent. By using benzophenone, manufacturers can dispense the product into clear glass bottles or plastic. If benzophenone is not available, opaque or black outer packaging is required. synthesis Diphenyl ketone can be prepared by reacting benzene with carbon tetrachloride to obtain diphenyl dichloromethane, and then continue to undergo hydrolysis reaction. [1] Or prepared by Friedel-Crafts acylation of benzene with benzoyl chloride in the presence of a Lewis acid catalyst
发表评论
阅读全文