CRMB is used worldwide for the improvement of binder characteristics for use in wearing courses of flexible pavements. CRMB is prepared by the addition of reclaimed truck tires further improved by the additives.
Research worldwide has shown that addition of crumb rubber to bitumen produces binders with improved resistance to combat pavement distresses such as rutting, fatigue cracking, thermal cracking etc. It has also been demonstrated that use of crumb rubber modified binder leads to reducing of overlay thickness as well as reduce reflective cracking potential. This adequately demonstrates that CRMB is a superior binder which has immense application in highly trafficked National and State Highways of India.
Crumb Rubber can be added to the bituminous mixtures as a filler i.e., Dry Process. Research has shown that bituminous mixtures produced in this way show limited engineering benefits as compared to the mixtures produced by addition of Crumb rubber to bitumen under appropriate processing conditions i.e., Wet Process, a method used to modify asphalt with crumb rubber modifier. This process requires cooking the liquid Bitumen and Crumb rubber Modifier at high temperatures (160℃ to 175℃) for almost two and half hours. The time and temperature of digestion of Crumb rubber modifier with Bitumen are known to have an important effect on the resulting Crumb Rubber Modified Bitumen. The major effect is due to absorption by the rubber particles of aromatic oil in the Bitumen. This causes softening and swelling of rubber particles so that a comparatively large proportion of binder (CRMB) consists of soft rubber.
The most remarkable aspect of CRMB is that it produces an environment friendly product. CRMB offers a solution to the waste disposal problem of the millions of tyres produces worldwide.
The addition of waste tyres in place of costlier virgin polymers results in greater cost savings, lower energy consumption and lower environmental pollution. The highways made using CRMB have performed comparable with those produced using much costlier polymers.
CRMB reduces deformation on road, specifically true at elevated temperature (50℃ to 70℃), where
rutting is excessive.
It is achieved due to improve elastic recovery of Crumb Rubber based modified Bitumen, compared to conventional VG - 30 or VG - 10 Bitumen.
It extends life of pavement by 50% to 100% when compared to conventional VG - 30, VG - 10 or penetration grade 60/70 - 80/100 Bitumen.
CRMB improves resistance to cracking resulting stronger and more durable overlays for corridors in the area of extreme climatic conditions and heavy traffic loads.
It promotes binder adhesion and cohesion to mineral aggregates.
The striping level and reviling of aggregate from surface are reduced and offer resistant to creep deformation
|Characteristics||Grade & Requirements|
|CRMB 50||CRMB 55||CRMB 60|
|Penetration at 25℃, 0.1 mm, 100 g, 5 s.||< 70||< 60||< 50|
|Softening point (R&B), ℃, Min||50||55||60|
|Flash point, COC, ℃, Min||220||220||220|
|Elastic recovery of half thread in ductilimeter at 15 ℃, percent, Min||50||50||50|
|Separation, difference in softening point (R&B), ℃, Max||4||4||4|
|Viscosity at 150℃, Poise||1-3||2-6||3-9|
|Thin film oven test and tests on residue:|
|a) Loss in mass, percent, Max||1.0||1.0||1.0|
|b) Increase in softening point, ℃, Max||7||6||5|
|c) Reduction in penetration of residue, at 25℃, percent, Max||40||40||40|
|d) Elastic recovery of half thread in ductilimeter at 25 ℃, percent, Min||35||35||35|
Do you import Bitumen or Purchase Domestic?
We import Viscosity Grade bitumen directly from top refineries of Middle east countries packed & bulk both forms& provide to clients at reasonable price. Refineries specially produce bitumen with our label too.
Are You PWD Empanelled?
Yes, we are authorized by PWD govt. of Raj. & Uttarakhand for quality bitumen.
Where do you supply Bitumen?
We supply Bitumen from Kandla, Mumbai, Mundra, Jaipur, Jodhpur, Pipavav, Vadodara, Hazira & so on.
Do you Export Bitumen?
Yes, we export Bitumen& we are no. 1 Bitumen Exporter in India in December 2021 and Jan 2022. We are the 3rd Largest Importer in packed bitumen category in India. We have pack drums available in 156kg & 180 kg. We export bitumen packed & bulk both forms. We export bitumen in Nepal Birgunj, Biratnagar, Bhairahawa, Nepalgunj, Kakarvitta and Still Going!
Where is your Head Office?
We are located in Jaipur (Raj.) since 2017 Near PWD Office.
What Grade or viscosity Bitumen do you supply?
We supply VG10, Vg30, VG40 in Bulk & drum both forms PAN India.
How long does it take to process the order?
After getting confirmation of an order, we proceed the order further & upto24hours-48hourswe dispatch the order.
Does the Prices are inclusive transportation Charges?
We quote Bitumen price only, but we can arrange transport for buyer separately.
What is the mode of payment?
We accept Payment Through Bank Transfer, BG (Bank Guarantee), LC (letter of credit) by government approved Financer/ Bank.
What is Bitumen Terms of Delivery?
We can Provide FOB shipments/Ex Port, CFR (Cost Freight Rate), CIF (cost Insurance & freight)
What are the benefits / advantages of VG Bitumen over Penetration Grade?
VG bitumen is globally preferred to penetration grades (30/40, 60/70, 80/100, and soon), mainly because it is tested and classified more accurately.
Do we have a ready-made chart to use various Bitumen Grades as per the temperature zones?
Yes, we have chart or test reports of every shipment as per viscosity, Penetration, Grade temperature & require product details.
How would you assure about the quality of Bitumen?
Our Bitumen is certified by Refineries & NABL& IIT Roorki laboratory also. We have in house Laboratory also & we do test of every shipment.