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BNB Oxidized Bitumen / Blown Grade Bitumen

BNB INDUSTRIAL GRADE BITUMEN
Industrial Bitumen is dark, petroleum residue modified by the oxidation process. Oxidized Bitumen / Blown Bitumen is produced by passing air through bitumen under controlled temperature conditions. Its consistency ranges from highly viscous to solid.

Oxidized/Blown grade bitumen has technical advantages such as durability, flexibility, water resistant and chemical stability. It is easy to apply and widely available.

Product Range of BNB Blown Bitumen

  • 85/25
  • 90/15
  • 115/15
  • 85/40
  • 155/6
  • 110/120
  • 40/11
  • 135/10
  • 80/90

Uses & Application

Blown grade bitumen is widely used for water proofing, manufacture of roofing felts, electric cable joint protection, Electric cable industry, joint filling compound, sealing compound, battery sealing compound, ink industry, Pipe coating, Mastic flooring & roofing, Paint, varnish, damp proof course etc.

Application Methodology

  • Blown grade bitumen should be broken up into small pieces.
  • Heat gradually till the bitumen melts completely. Heat the required quantity only.
  • Continuously stir to prevent local overheating. A thermometer should be used to ensure that the bitumen is not overheated or it will lose much of its properties.
  • Bitumen brought up to its normal working temperature is applied with a brush or by pouring and spreading using a rubber squeegee.
  • Use goggles, gumboots, nose covers and hand gloves during application

Specification and Uses

Bitumen Straight Grade ' Industrial Grades " Method of Test
     
  30/40 20/40 10/20 80,90 110,120 85,40 85/25 90.15 115.15 1:35110 1 55/6
LS Grade 5.35 6525 75/15     8540 85/25 90/15 11515 13510 11516
Specific Gravity at 27°C minimum 0.99 1.00, 1.05 1.03 /1D5 1.03/1.08 1.04/1.09 0- 1D0 ' 15 1D1- 15 .0.0.0- 11- 1.C16 1D1 1E; .- 102 1.07 1.02- 1.07 15:1202: 1978
Flash Point. Pensky martens Cloused Type. °C minimum 173 175 200 200 200 225 225 228 225 725 228 I5:1202. 1978
softening Point, °C 30 to
65
50 to 70 65 to 60 - 60 to h( 110 to
'120
80 to
90
80 to
90
85 to
100
110 to
120
130 to
140
150 to
160
1 5:1205: 1978
Penetration at 25 °C. 100g. 5 sec. in 1.1 Aii., cm 30 to
40
20 to 30 10 to 20 IS. to 12 3 to 7 35 to
45.;
29:
30
10 to
20
. _ .
8 to 20
7 to 12 2 to 10 1S:1203: 1978
Ductility at 27 °C, in cm minimum 12 10 2.5     °
,
3 2 2 1 0 15:1208: 1978
Loss on heating. percent by weight. maximum 1 0.30 0.30 0.10 0.10 0.30 0.30 0.3C1 0.30 am 0.30 15:1212: 1978
Percent by weight scluble in carbon-disulphide. m'in 99 99 99 99 99 99 99 90 99 99 99 IS: 1216: 1978
Industrial Uses                        
water Proofing                      
Lamination Industry                      
Bituminous Paper                      
Paints, Varnishes and Japans                      
Cold Storage & Refrigeration                      
Printing Inks                      
Electrical Cable Junction Boxes                      
Electrical Cable Nlanufacture                      
Battery Containers                      
Battery Sealing Compounds                      
Rubber Industry                      
Pipe Coating                      
.Joint Filling Compounds                      
Mastic for flooring & roofing                      
Damp Proof Courses                      
C cal p,rici uetting                      
Application Per Use   * AS Per 73/2006 **AS Per IS: 702/1988 Current Production is non-ductile ** (Method A)

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