Steel Steel Microsilica at Best Price in Zhejiang, Zhejiang

Microsilica By Flyup Material Resource Corporation

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Product Specifications

BET fineness	15-27 m²/g
Density	600-700 kg/m³
Pozzolanic activity	85-105%
Water requirement	<125%
Sieve retention	<8%
Moisture content	<3%
Loss on ignition	<3%
Features	Strength enhancement, High durability, Improved workability, Corrosion resistance, Water impermeability, Early strength gain, Increased density

Product Overview

Key Features

Silica Fume/Microsilica Definition

The American Concrete Institute (ACI) defines silica fume/microsilica as very fine noncrystalline silica produced in electric arc furnaces as a by-product of the production of elemental silicon or alloys containing silicon (ACI 116R). It is usually a gray colored powder, somewhat similar to portland cement or some fly ashes. Figure1 shows a typical silica fume/microsilica as it appears after being collected from a furnace.

How is Microsilica/Silica fume Produced?

Microsilica/Silica fume is by-product of producing silicon metal or ferrosilicon alloys in smelters using electric arc furnaces. These metals are used in many industrial applications to include aluminum and steel production, computer chip fabrication, and production of silicones, which are widely used in lubricants and sealants. While these are very valuable materials, the by-product microsilica/silica fume is of more importance to the concrete industry.

Physical character:

Existing form: Powder
Typical color: Brown
B.E.T Fineness: 15-27m2/g
Density: 600-700kg/m³
Pozzolanic activity index: 85% of 28days ; 105% of 7days
Water requirement ratio: Less than 125%
Retained on 45 micron sieve: Less than 8%
Moisture: Less than 3%
Loss on Ignition: Less than 3%

Chemical component:

SiO2 85(85%-97%) ; CI 0.02 ; MgO 2.0 ; Fe2O3 0.9:
Al2O3 0.8 ; CaO 2.0 ; K2O 2.0

USAGE

Micro silica in concrete

Making high-grade concrete (upwards C70) effectively enhances the strength and pumpability of strong concrete.
Making high seep-resistant, self water-proof concrete, be used in underground, tunnel and the cellar of high- rise structure.
Used in maritime works and chemical industry. Because of the compact design, it can effectively prevent sulphate and chlorine ion from osmosizing and eroding.. Avoid the steel corroding in armored concrete(RC), and prolong being of the concrete.
In project item for Iwater conservancy, high speed and bridge, the concrete not only needs basic quota mentioned above, but its wear-resistant quality and abrasion resistance. So adding the micro silica is necessary
Because of its high activity and buck performance, it is used as a kind of additional ion and has effects on high -early strength concrete and strong concrete . Such the concrete can be used quickly in project. As additional ion, micro silica can be timbering the concrete excelling in and jetting, and also used in the concrete of underwater projects such as pier, huge dam and drilling platform.

Micro silica in the building project

Road building: The concrete mixing micro silica has been stronger, made the best of its characteristic, and be used in building some high speed, airdrome runway, road tunnel and rush to repair the road surface.. YIZHENG CHEMICAL FINE FACTORY built the road in using the concrete mixing micro silica, strutting intensity is up to 25Mpa within 12 hours, resisted eroding being improved again, and the strutting intensity is up to 37 Mpa with in 24 hours and so exceeding the request of designing concrete C20.
Building in port, bridge, salt water projects: Micro silica concrete has strong compact performance and high resistance rate, so it can not form into breaking electrochemistry, however building up resisted eroding. It is used in many successful buildings, for example, HONGKONG QINGMA BRIDGE, JIANGSU LIANYUNGANG WOOD DOCK, CHENGQING BIG BUDDHA TEMPLE YANGTSE RIVE BRIDGE.
Jetting concrete projects: Micro silica improves the concretes adhesive and cohesion performance after it is filtered into concrete. And so mostly having decreased back-flipping performance, augmenting the thickness of resisted concrete being formed once. If so, project time would be shortened and project cost would be saved. In some accident country, 75% resisted concrete mixing micro silica, and in Norway and in Sweden, micro silica is the necessary material in the resisted concrete.

Micro silica in fire-resistant material

The traditional fire-resistant materials have many holes. If micro silica is filtered into the fire-resistant materials, it can enhance its volume and density , decrease its air vent rate, buildup its intention.
Micro silica has strong activity and can form into colloid ion in water, and then buildup fluidity and improve moulding if it is added into some proper detraction ion.
Micro silica can easily form into SI-OH group, and such it has stronger hydrophile performance and activity, buildups fire-resistant materials cohesion, improves high temperature and prolongs being of the fire resistant goods.