Production of steel fiber reinforced concrete, the main question is how effective the fiber material is uniformly dispersed in the concrete, the fibers into a group or just avoid dense knot. This has the feeding order a lot of concrete, aggregate and should generally be the first fine aggregate dry mix, white aluminum oxide then add the fibrous material has been evacuated by adding cement and stir in the water. If the cement and water join prematurely, the fibers absorb water, under water adsorption force between the surface tension and fiber, combined with bonding of the cement, steel fiber agglomerate into groups, directly affect the uniformity of steel fiber reinforced concrete, this will greatly reduce the performance of steel fiber reinforced concrete.Ordinary concrete with high compressive Glass beads strength, but the tensile strength, toughness and crack resistance are poor. In general the amount of concrete mixed with steel fiber concrete preparation called steel fiber reinforced concrete. Tensile strength, crack, toughness and compressive strength, flexural strength, flexural strength of steel mold for grinding wheel fiber concrete would have greatly improved. As a new type of steel fiber reinforced concrete concrete, has its unique advantages and performance.
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2014年7月24日星期四
2014年7月22日星期二
alluvial garnet gbrasives Fused brick
Fused Fused zirconia corundum brick brick brick , also known as the abbreviation is AZS, is based on three chemical composition Al2O3-Zr02-Sio2 ternary phase diagram , according to their order of how much content , Al2O3 take A, Zr02 take Z, Sio2 take S, using the abbreviation for national standards , such as 33 cast AZS bricks, abbreviated as AZS-33 #, 36 cast AZS bricks, abbreviated as AZS-36 #, 41 cast alluvial garnet gbrasives AZS bricks, abbreviated as AZS- 41 # .
Fused brick manufacturing process will be a selection of zircon sand and industrial alumina powder with 1:1 , plus a small amount of NaZO ( in the form of sodium carbonate is added ), B20: ( in the form of boric acid or borax added ) flux , mixed uniform , after the 1900 ~ 2000 ℃ melt cast molding , can be prepared containing zr0233% of the cast slabs . On this basis , the use of part desilication zircon sand as raw material , can brown fused aluminum oxide be obtained with ZrO2 36% ~ 41% of the cast slabs . gaogangyuzhuan corundum brick (z irconia-eorundumrefraetory brick) using industrial alumina powder and a selection of zircon sand as raw material , ZrO2 content is made ??of 33% to 45 % of the refractory Fused zirconia mullite products . Fused zirconia corundum brick is mainly used in the glass industry furnaces , electric glass furnace, the steel industry 's slide, sodium silicate industry kilns and other high temperature erosion -resistant refractory kiln
2014年7月20日星期日
alluvial garnet gbrasives Liquid relative
Liquid relative to the dry blasting machine blasting machine, the biggest feature is the good control of the blasting process dust pollution and improve the working environment for blasting operations.
General composition
A complete liquid blasting machine alluvial garnet gbrasives generally consists of five components, namely the structure of the system, medium power systems, piping systems, control systems and auxiliary systems.
Works
Sandblasting machine is grinding pump liquid as the liquid feed mill powered by the alluvial garnet gbrasives the liquid (abrasive and water mixture) into CBN abrasive grit the gun. Compressed air as the driving force to accelerate the grinding fluid through the pipeline into the gun in the gun, the gun into the air to accelerate the grinding fluid, and after the injection nozzle, spray the surface to be processed to achieve the desired processing purposes. In liquid blasting machines, grinding brown fused aluminum oxide pump to feed power, compressed air to accelerate momentum.That cleanliness, representative of international standards, there are two: one is the United States 85 years to develop "SSPC-"; second is 76 years in Sweden developed "Sa-", which is divided into four grades were Sa1, Sa2 , Sa2.5, Sa3, the usual common international standards. 
2014年7月18日星期五
CBN abrasive grit prohibit close
Must wear protective equipment before working good, are not allowed to work naked arm. Shall not be less than two at work.
Tank, pressure gauge, safety valve to regularly check. Gas tank once every two weeks emissions of dust, sand filter tank checked once a month.
CBN abrasive grit the vent pipe and blasting CBN abrasive grit machine door is sealed. The first five minutes of work required to start the ventilation and dust removal equipment, ventilation and dust removal equipment failure when the ban sandblasting machine work.
Compressed air to slowly open the valve, pressure must not exceed 0.8MPa.
Sand grain size should be green silicon carbide adapted to the requirements of work, usually between ten to twenty numbers apply, sand should be kept dry.
When sandblasting machine work, CBN abrasive grit. When cleaning and adjusting operation of the site should be shut down.
Who are not allowed to use compressed air to blow dust or joking.
After work, ventilation and dust removal steel fiber for concrete reinforcement equipment should continue to operate for five minutes and then off to exhaust indoor dust and keep clean.
Occurrence of personal, equipment accidents, should protect the site and report the authorities.
2014年7月11日星期五
alluvial garnet gbrasives Garnet
Garnet is a mineral garnet crystal with pomegranate seeds shapes, colors are very similar, hence the name "garnet." Good color and transparency can be a gem garnet, garnet English name for the Garnet, from the Latin "Granatum" evolved, meaning "as a seed." Common garnet red, but the color alluvial garnet gbrasives is very broad kind enough to cover the entire spectrum of color. Common Garnet recognized for its chemical components into six were red garnet (Pyrope), almandine garnet (Almandine), manganese aluminum garnet (Spessartite), calcium and iron garnet (Andradite), calcium aluminum garnet (Grossular) and uvarovite (Uvarovite).
Garnet common garnet red, but the color is very broad kind enough to cover the entire spectrum of color. Garnet Product "Garnet" from the Latin "granatus" ("grain", i.e. grain), may be green silicon carbide provided by "Punica granatum" ("pomegranate", i.e., pomegranate) from [3], which is a red plant seeds the shape, size and color are similar portion garnet crystal.
Garnet common response to Glass beads its chemical composition and confirmed into six types [4], respectively, red garnet (Pyrope), almandine (Almandine), manganese aluminum garnet (Spessartite), andradite (Andradite) calcium aluminum garnet (Grossular, variants have tsavorite (tsavorite) and cinnamon Stone (hessonite)) and uvarovite (Uvarovite). Garnet form two solid solution series: a red garnet - almandine - spessartine and 2 uvarovite - grossular - andradite.
waterjet abrasives Mechanism of action of fiber reinforced concrete
Mechanism of action of fiber reinforced concrete
According to theoretical and experimental results at home and abroad, compared with ordinary concrete, mechanical properties of steel fiber reinforced concrete significantly improved tensile strength and can be increased by about 2-fold, bending strength is 2.5-3.5 times that of ordinary concrete Fused zirconia mullite flexural strength, improve the impact strength is more obvious, generally up to 5 times more than ordinary concrete, and even up to 20 times.
Currently, the mechanism of steel fiber reinforced concrete, there are two different interpretations. One is the fiber spacing mechanism proposed by the United States Rmuald; One is composite mechanism brown fused aluminum oxide England Swamy, Manga and others made. Here we analyze the main fiber spacing mechanism.
Fiber spacing mechanism is based on the basis of linear elastic fracture mechanics description of a constraint fiber up to the occurrence and development of cracks. mold for grinding wheel The mechanism that in the concrete originally flawed, desire to improve the strength of this material, it must be possible to reduce the level of defects, improve toughness and reduce stress concentration factor inside the crack tip.
2014年7月9日星期三
CBN abrasive grit Refractoriness
Refractoriness is the material reaches a certain degree of softening temperature under high temperature, high temperature performance characterization of the material to resist.
Significance of refractoriness and different CBN abrasive grit melting points indicated. The crystalline melting point of the liquid to the solid phase at body temperature equilibrium. Refractoriness multiphase body reaches a certain degree of softening temperature. The vast majority of ordinary refractories, for both the multiphase heterogeneous materials, without necessarily melting point, it began to appear liquid to completely melt is a gradual process, in a fairly wide temperature range, solid-liquid phase coexistence. Gu Yu Characterization softening and melting characteristics of this material at high temperature can be measured in refractoriness.
Refractory material is not a specific absolute quantities, the material is measured under specified test conditions to achieve the particular degree of softening of the relative time specification. The test mold for grinding wheel material made according to the method prescribed truncated triangular pyramid (referred to as test cone), and has a fixed bend down at a specific temperature, heating rate standard temperature truncated triangular cone (referred to as standard cone) of servers in a given heating rate and a certain heating under atmospheric conditions, in order to test the degree of bending down cone with a standard cone bend down quite a contrast method for determining the degree of refractoriness. Under the sea bottom truncated cones, long 8mm, on the sea bottom 2mm, height 30mm. When measured, the cone angle may be in the liquid phase at elevated temperatures. With increasing temperature, increasing the amount of liquid, the liquid viscosity is reduced, the cone softened. When softened to a certain extent, the effect of its own weight cone gradually bend down. When synthetic diamond tested with a standard taper cone while bending down until its apex in contact with the chassis, then this standard inverted cone curved determined temperature prevail, as the test cone refractoriness. Our general standard cones and cone bent down to WZ temperature tenth bid. If the test standard taper cone and WZ171 No. bend down simultaneously, the refractoriness of the sample is 1710 ℃. Many other countries Seck cone (SK) as a standard cone, specific measurement method is slightly different.
2014年7月7日星期一
alluvial garnet gbrasives fiber reinforced concrete
Ordinary concrete with high compressive strength, but the tensile strength, toughness and crack resistance are poor. In general the amount of concrete mixed with steel fiber steel fiber for concrete concrete preparation called steel fiber reinforced concrete. Tensile strength, crack, toughness and compressive strength, flexural strength, flexural strength of steel fiber concrete would have greatly improved. As a new type of steel fiber reinforced concrete concrete, has its unique advantages and performance.
Production of steel fiber reinforced concrete, the main question is how effective the fiber material is uniformly dispersed in the concrete, the fibers into mold for grinding wheel a group or just avoid dense knot. This has the feeding order a lot of concrete, aggregate and should generally be the first fine aggregate dry mix, then add the fibrous material has been evacuated by adding cement and stir in the water. If the cement and water join prematurely,Fused zirconia mullite the fibers absorb water, under water adsorption force between the surface tension and fiber, combined with bonding of the cement, steel fiber agglomerate into groups, directly affect the uniformity of steel fiber reinforced concrete, this will greatly reduce the performance of steel fiber reinforced concrete.
alluvial garnet gbrasives Steel fiber reinforced concrete
Ordinary concrete with high compressive strength, but the tensile strength, toughness and crack resistance are poor. In general the amount of concrete mixed with steel fiber concrete preparation called steel fiber reinforced concrete. Tensile strength, crack, toughness and compressive strength, flexural strength, flexural strength of steel fiber concrete would have greatly improved. As a new type of steel fiber reinforced concrete concrete, has its unique advantages and performance.
Production of steel fiber reinforced concrete, the main question is how effective the fiber material is uniformly dispersed in the concrete, the fibers into a group or just avoid dense knot. This has the feeding order a lot of concrete, aggregate and should generally be the first fine aggregate dry mix, then add the fibrous material has been evacuated by adding cement and stir in the water. If the cement and water join prematurely, the fibers absorb water, under water adsorption force between the surface tension and fiber, combined with bonding of the cement, steel fiber agglomerate into groups, directly affect the uniformity of steel fiber reinforced concrete, this will greatly reduce the performance of steel fiber reinforced concrete.
alluvial garnet gbrasives Mechanism of action of fiber reinforced concrete
Mechanism of action of fiber reinforced concrete
According to theoretical and experimental results at home and abroad, compared with ordinary concrete, mechanical properties of steel fiber reinforced concrete significantly CBN abrasive grit improved tensile strength and can be increased by about 2-fold, bending strength is 2.5-3.5 times that of ordinary concrete flexural strength, improve the impact strength is more obvious, generally up to 5 times more than ordinary concrete, and even up to 20 times.
Currently, the mechanism of steel fiber reinforced concrete, there are two different interpretations. One is the fiber spacing mechanism proposed by the Glass beads United States Rmuald; One is composite mechanism England Swamy, Manga and others made. Here we analyze the main fiber spacing mechanism.
Fiber spacing mechanism is based on the basis of linear elastic fracture mechanics description of a constraint fiber up to the occurrence and development of cracks. The mechanism that synthetic diamond in the concrete originally flawed, desire to improve the strength of this material, it must be possible to reduce the level of defects, improve toughness and reduce stress concentration factor inside the crack tip.
According to theoretical and experimental results at home and abroad, compared with ordinary concrete, mechanical properties of steel fiber reinforced concrete significantly CBN abrasive grit improved tensile strength and can be increased by about 2-fold, bending strength is 2.5-3.5 times that of ordinary concrete flexural strength, improve the impact strength is more obvious, generally up to 5 times more than ordinary concrete, and even up to 20 times.
Currently, the mechanism of steel fiber reinforced concrete, there are two different interpretations. One is the fiber spacing mechanism proposed by the Glass beads United States Rmuald; One is composite mechanism England Swamy, Manga and others made. Here we analyze the main fiber spacing mechanism.
Fiber spacing mechanism is based on the basis of linear elastic fracture mechanics description of a constraint fiber up to the occurrence and development of cracks. The mechanism that synthetic diamond in the concrete originally flawed, desire to improve the strength of this material, it must be possible to reduce the level of defects, improve toughness and reduce stress concentration factor inside the crack tip.
2014年7月4日星期五
CBN abrasive grit Meaning and effect of high temperature refractory
Meaning and effect of high temperature refractory Refractoriness is the material reaches a certain degree of softening temperature under high temperature, high temperature performance characterization of the material to resist.
Significance of refractoriness and different melting brown fused aluminum oxide points indicated. The crystalline melting point of the liquid to the solid phase at body temperature equilibrium. Refractoriness multiphase body reaches a certain degree of softening temperature. The vast majority of ordinary refractories, for both the multiphase heterogeneous materials, without necessarily melting point, it began to appear liquid to completely melt is a gradual process, in a fairly wide temperature range, solid-liquid phase coexistence. Gu Yu Characterization softening and melting characteristics of this material at high temperature can be measured in refractoriness.
Refractory material is not a specific absolute quantities, the material is measured under specified test conditions to achieve the particular degree of softening of the relative time specification. The test material made according to the method prescribed truncated triangular pyramid (referred to as test cone), and has a fixed bend down at a specific temperature, heating rate standard temperature truncated triangular cone (referred to as standard cone) of servers in a given heating rate and a certain heating under atmospheric conditions, in Glass beads order to test the degree of bending down cone with a standard cone bend down quite a contrast method for determining the degree of refractoriness. Under the sea bottom truncated cones, long 8mm, on the sea bottom 2mm, height 30mm. When measured, the cone angle may be in the liquid phase at elevated temperatures. With increasing temperature, increasing the amount of liquid, the liquid viscosity is reduced, the cone softened. When softened to a certain extent, the effect of its own weight cone gradually bend down. When tested with a standard taper cone while bending down until its apex in contact with the chassis, then this standard inverted cone curved determined temperature prevail, as the test cone refractoriness. Our general steel fiber for concrete standard cones and cone bent down to WZ temperature tenth bid. If the test standard taper cone and WZ171 No. bend down simultaneously, the refractoriness of the sample is 1710 ℃. Many other countries Seck cone (SK) as a standard cone, specific measurement method is slightly different.
[1] refractoriness refractory is an important technology assessment indicators. However, not as a product temperature limit. Polycrystalline refractory material composed of a single phase, which is generally lower than the melting point of the crystal refractoriness. However, some refractory material, such as when high viscosity liquid form, which can be higher than the melting point of refractoriness.
Significance of refractoriness and different melting brown fused aluminum oxide points indicated. The crystalline melting point of the liquid to the solid phase at body temperature equilibrium. Refractoriness multiphase body reaches a certain degree of softening temperature. The vast majority of ordinary refractories, for both the multiphase heterogeneous materials, without necessarily melting point, it began to appear liquid to completely melt is a gradual process, in a fairly wide temperature range, solid-liquid phase coexistence. Gu Yu Characterization softening and melting characteristics of this material at high temperature can be measured in refractoriness.
Refractory material is not a specific absolute quantities, the material is measured under specified test conditions to achieve the particular degree of softening of the relative time specification. The test material made according to the method prescribed truncated triangular pyramid (referred to as test cone), and has a fixed bend down at a specific temperature, heating rate standard temperature truncated triangular cone (referred to as standard cone) of servers in a given heating rate and a certain heating under atmospheric conditions, in Glass beads order to test the degree of bending down cone with a standard cone bend down quite a contrast method for determining the degree of refractoriness. Under the sea bottom truncated cones, long 8mm, on the sea bottom 2mm, height 30mm. When measured, the cone angle may be in the liquid phase at elevated temperatures. With increasing temperature, increasing the amount of liquid, the liquid viscosity is reduced, the cone softened. When softened to a certain extent, the effect of its own weight cone gradually bend down. When tested with a standard taper cone while bending down until its apex in contact with the chassis, then this standard inverted cone curved determined temperature prevail, as the test cone refractoriness. Our general steel fiber for concrete standard cones and cone bent down to WZ temperature tenth bid. If the test standard taper cone and WZ171 No. bend down simultaneously, the refractoriness of the sample is 1710 ℃. Many other countries Seck cone (SK) as a standard cone, specific measurement method is slightly different.
[1] refractoriness refractory is an important technology assessment indicators. However, not as a product temperature limit. Polycrystalline refractory material composed of a single phase, which is generally lower than the melting point of the crystal refractoriness. However, some refractory material, such as when high viscosity liquid form, which can be higher than the melting point of refractoriness.
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