Asphaltic Sheet1.pptx
- 2. Introduction • A Asphalt also known as bitumen is a sticky, black and highly viscous liquid or semi-solid form of petroleum. • The primary use (70%) of asphalt/bitumen is in road construction. • It is used as the glue or binder mixed with aggregate particles to create asphalt concrete for roads. • Its other main uses are for bituminous waterproofing products
- 3. Asphalt shingles come in two varieties: 1. Fiberglass 2. Organic. Fiberglass shingles are made of a woven fiberglass base mat, covered with a waterproof asphalt coating, and topped with ceramic granules that shield the product from harmful UV rays Types Of Asphaltic sheet The traditional organic mat-based shingles are made from a recycled layer of felt paper, asphalt-saturated for waterproofing, and coated with adhesive asphalt into which the ceramic granules are embedded.
- 4. Asphalt shingles are available in 2 profiles: 1. 3-Tab 2. Laminated (Architectural) ASPHALT SHINGLE STYLES
- 5. CHARACTERISTICS Light - weight • Easier to handle, fix and transport • Avoids the use of strong base material, thereby reducing the complexity of all the structures. Flexibility • Ease of handling and fixing • Right choice for curved roof-tops and irregular surfaces. Durability • High stress-bearing capacity and • Resistance against extremes of weather • Most reliable material. • Leakproof, rust proof and termite-proof Safety & Hygiene • It is very safe to handle and work with, and poses no health hazards to humans.
- 6. Manufacturing process The production of asphalt roofing products consists of six major operations: Felt saturation Coating Mineral surfacing (top and bottom), Cooling and drying Product finishing (seal-down strip application, cutting and trimming, and laminating of laminated shingles), and Packaging
- 7. ADVANTAGES • Affordable • Durability -12 to 15 years • Asphalt sheet covering is easily repaired without solvents or adhesives. DISADVANTAGES • Asphalt shingles get damaged if installed at below freezing temperatures. • Asphalt shingles are not resistant to extreme temperature variations, which causes expansion and contraction of the shingle and subsequent cracking. • extreme heat causes shingles to crack and loose color • Regular maintenance and repairs are required and are better done before it rains • The main drawback of asphalt sheet covering is the risk of fire during installation.
- 8. Installation method • Glue in place with bitumen/solvent mix • Torch on - underside of felt melted with a torch and pressed in place
- 9. • Nail in place - relies on the clout nail head being driven slightly under the surface for a pressure seal. Waterproofing not quite perfect, a water durable timber layer is used under the felt, usually plywood. • Hot bitumen
- 10. Uses • As damp proofing material in building construction. • For waterproofing layer on top of roof Used in 1. Theaters 2. Dairy - farms 3. Poultry- farms 4. Schools 5. Factories 6. Canteens 7. Motor-sheds 8. Garages 9. Commercial and residential buildings
- 11. Failures • A common problem in asphalt sheet coverings includes wrinkles or bubbles. • Granule loss and exposure of "bald spots" or cracking are common signs that is asphalt sheet at the end of its life
- 12. Failures • Wear From Walking-on • Inadequately Heated asphalt sheet • asphalt sheet Edge Bending & Wear
- 13. DIFFERENT MANUFACTURERS IN INDIA • Linhoff India Private Limited- situated in Mumbai. • Vinayak Construction Equipments- situated in valva gidc Ahemdabad • Stroke Equipments & Instrumentation Pvt Limited – situated in Bengaluru • Hindustan Industries Naraina – situated in New Delhi Market form available in rolls having width 1m or 60 cm(2ft) length may be 20 to 25 m according to manufacturer . 80 rs per metre MARKET RATE