Silica Fumes Silica fume, also known as microsilica, is a by- - - PowerPoint PPT Presentation

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Jul 20, 2023 1.12k likes •1.3k views

Silica Fumes Silica fume, also known as microsilica, is a by- product of the reduction of high purity quartz with coal in electric furnaces in the production of silicon and ferrosilicon alloys. Silica Fume is also collected as a by-product in

SLIDE 1

Silica Fumes

Silica fume, also known as microsilica, is a by- product of the reduction of high purity quartz with coal in electric furnaces in the production of silicon and ferrosilicon alloys. Silica Fume is also collected as a by-product in the production

f
ther

silicon alloys such as ferrochromium, ferromanganese, ferro magnesium, and calcium silicon.

SLIDE 2

Need for recycling and reuse of Tires

Threat to human health and the environment

(poisonous gas production)  tire fires Collection of rainwater (Mosquito breeding) Land Pollution

Recycling or Reuse
Stockpiled or landfilled

Unsightly

SLIDE 3

Civil Engineering Applications of Scrap Tires

Sub-grade Insulation for Roads Road embankments Asphalt Rubber Pavement

SLIDE 4

Pavement Requirements

Durability (Flexible/ Rigid)
Deformation/ Modulus
Thermal Resistance
Rutting Resistance
Wearing
Shrinkage Resistance
Skid Resistance

Rubber Tire with Steel Mesh meets all above requirements

SLIDE 5

Splicing

Side-walls Schematic diagram of spliced and flattened Tire

Prof. R C Joshi
Univ. of Calgary, Canada

SLIDE 6

Longitudinal Direction of Pavement Width of Pavement

SLIDE 7

Growing plants without soil)

Beneficial Use of Glass Aggregates

SLIDE 8

www.deme.be/projects/malaysia_pulauindah.html http://www.deme.be/projects/maldive_hulhumale.html

Application of Dredged Material

SLIDE 9

Beneficial Use of Dredged Material

Beach nourishment
Shore protection
Soil creation/enhancement
Land reclamation
Habitat restoration
Construction materials

SLIDE 10

Characterization of waste

1. Water content
2. Density
3. Granulometry (fractions of gravel, sand, silt and clay)
4. The following constituents:

a) Total organic carbon b) Carbonate content c) Mercury, arsenic, cadmium, copper, lead, zinc, chromium, nickel, iron, manganese. d) Organochlorines e) Total extractable hydrocarbons f) Tributyltin (TBT) and dibutyltin (DBT) g) Polycyclic aromatic hydrocarbons (PAH) h) Toxicity tests (Microtox or whole sediment bioassay) i) Thermal & Chemical stability

SLIDE 11

Characterization of waste

Need for a complete Physico-chemico-Mineralogical Thermal & Electrical Characterization To understand their behavior and recommending a proper utilization scheme