high volume fly ash concrete (hvac ) for infrastructure
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High Volume Fly ash Concrete(HVAC ) for Infrastructure development
Applications:• Power (Hydro, Thermal & Nuclear) sector.• Dams, Barrages & Irrigation Projects.• Marine Projects (Underwater Concreting).• Environmental Engineering Projects.
• High volumes of fly ash• Low water content• Low Portland cement content
Environmental Geomechanics Lecture No. 8 D N Singh
Slide 6IIT Bombay
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 of other silicon alloys such as ferrochromium, ferromanganese, ferro magnesium,and calcium silicon.
Environmental Geomechanics Lecture No. 8 D N Singh
Slide 7IIT Bombay
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
IIT Bombay
Unsightly
Environmental Geomechanics Lecture No. 8 D N Singh
Slide 8
Civil Engineering Applications of Scrap Tires
Sub-grade Insulation for Roads
Road embankments Asphalt Rubber Pavement
Environmental Geomechanics Lecture No. 8 D N Singh
IIT Bombay Slide 9
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
Environmental Geomechanics Lecture No. 8 D N Singh
Slide 10IIT Bombay
Splicingof
Side-walls
Schematic diagram of spliced and flattened TireEnvironmental Geomechanics Lecture No. 8 D N Singh
Slide 11IIT Bombay
Prof. R C JoshiUniv. of Calgary, Canada
Longitudinal Direction of PavementW
idth
of
Pav
emen
t
Environmental Geomechanics Lecture No. 8 D N Singh
Slide 12IIT Bombay
Environmental Geomechanics Lecture No. 8 D N Singh
Slide 13IIT Bombay
Growing plants without soil)
Beneficial Use of Glass Aggregates
www.deme.be/projects/malaysia_pulauindah.html
http://www.deme.be/projects/maldive_hulhumale.html
Application of Dredged Material
Environmental Geomechanics Lecture No. 8 D N Singh
Slide 14IIT Bombay
Beneficial Use of Dredged Material
• Beach nourishment • Shore protection • Soil creation/enhancement• Land reclamation • Habitat restoration • Construction materials
Environmental Geomechanics Lecture No. 8 D N Singh
Slide 15IIT Bombay
Characterization of waste
1. Water content2. Density3. Granulometry (fractions of gravel, sand, silt and clay)4. The following constituents:
a) Total organic carbonb) Carbonate contentc) Mercury, arsenic, cadmium, copper, lead, zinc, chromium, nickel, iron, manganese.d) Organochlorinese) Total extractable hydrocarbonsf) Tributyltin (TBT) and dibutyltin (DBT)g) Polycyclic aromatic hydrocarbons (PAH)h) Toxicity tests (Microtox or whole sediment bioassay)i) Thermal & Chemical stability
Environmental Geomechanics Lecture No. 8 D N Singh
Slide 16IIT Bombay
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