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Features Specifications: Microsilica

We have  deal with microsilica products for many years , our products often shipment to Mid-east ,products pass ASTM-C 1240 , 920D , 
When added to precast and ready-mixed concrete, silica fume produces high-performance, high-strength concrete with an increased life-span and improved structural economics. Silica fume is available in its as-produced, undensified form. For greater convenience, we produce densified silica fume, with twice the bulk density, provides many benefits. It is dustless, uniform, smooth, free of lumps and flows readily for bulk handling applications. Dry densified silica fume is the most economical product form for transportation, as its higher density allows bulk handling methods, and reduced shipping costs.
BENEFITS
Prevents reinforcing steel corrosion in concrete, due to its extremely low permeability to chloride-ion intrusion and high electrical resistivity.
Greater impermeability, barring the ingress of moisture, chemicals and other contaminants.
High early strengths, assuring increased efficiency and greater cost effectiveness in production of prestressed and precast concrete.
High ultimate compressive strengths (8, 000-20, 000 psi) , proportionate to amount of silica fume and the water-to-cementitious ratio.
Substantially greater resistance to corrosion, abrasion and erosion, chemical attack and freeze / thaw damage.
APPLICATIONS: Silica fume is ideal for use in structures exposed to chemical and environmental attack.
Parking garages
Bridge decks
Marine structures
Slabs
Roadways
In precast concrete (made in a manufacturing environment) it is more efficient, and results in cost and time savings.
Specifications:
Composition SiO2   Al2O3 Fe2O3 CaO MgO Na2O K2O C I. L ph h2o
Weight%      >85    <1. 5 <2 <3 <4 <3 <4 <8. 5 <2
Weight%     >90     <1. 5 <2 <1. 5 <1. 5 <2. 5 <4 <7. 5 <2
Weight%     >95    <1. 5 <2 <1. 5 <1. 5 <2 <4 <6. 5 <2
1) H2O<1% , moisture content <3%
2)  densified: 500-600kg / cbm

Packing:
1) 850kg / bag, 20 bags / carton,   Or per customer's requirement