Bitumen RC-70

Cutback RC70

Introduction 

Cutback Bitumen, specifically RC70, is a form of asphalt cement that incorporates a solvent or distillate to achieve liquid form at ambient temperatures, enhancing its coating ability on aggregates. 

Properties of Cutback Bitumen RC70

Cutback Bitumen RC-70 contains a specific percentage of distillate and exhibits unique characteristics.

Solvent Percentage and Types

It can contain between 12 and 40 percent distillate, with gasoline or naphtha commonly used as flux agents. The solvent content influences the curing time and application properties of RC-70.

Declining Use and Environmental Impact

High demand for distillates in energy sectors and air quality regulations have led to a decrease in the use of cutback asphalt, including RC-70, in construction projects.

Types of Cutback Asphalt

Various types of cutback asphalt exist, with RC-70 falling under the rapid curing category with specific ASTM specifications.

Rapid Curing (RC) Cutback Asphalt

RC cutback asphalt, including RC-70, is designed for rapid curing and is suitable for certain pavement construction and maintenance tasks.

Uses of Cutback Bitumen RC-70

It has several practical applications in construction projects.

Penetrating Prime Coats

It is used for penetrating prime coats on surfaces, enhancing adhesion and durability.

Patching Mixtures

RC-70 is incorporated into patching mixtures for repairing damaged asphalt surfaces.

Tack Coats

Ideal for tack coats, RC-70 improves bonding between layers during pavement construction and maintenance.

Packing and Safety Measures

Details regarding the packaging of RC-70 and essential safety precautions are outlined.

Packaging Details

RC-70 is packaged in bulk tankers and new steel drums on pallets to prevent leaks and ensure safe transportation.

Safety Precautions

Safety data sheets should be consulted before use, and precautions such as eliminating ignition sources, wearing appropriate PPE, and avoiding contact with skin or vapors must be followed.

Specification of Cutback Bitumen RC-70

Property

specification limit

 Test method

Min

Max

Kinematic viscosity at 60°c ,cST

70

140

ASTM D2170

Flash point(tag open cup), °c

— 

 —

ASTM D3143

Distillation test
Distillate, volume percent of total Distillate to 680°f(360°c)

to 437°f(225°c)
To 500°f(260°c)
to 600°f(316°c)
Residue from distillation to
680°f(360°c), percent volume by difference

50

ASTM D402

70

85

55

 

Test on Residue from distillation test

Penetration 77°f(25°c) 100g,5s mm

80

120

ASTM D5

Ductility 77°f(25°c) 5cm/min cm

100

 —

ASTM D113

Solubility in trichloroethylene %

99

— 

ASTM D2042

Water, percent volume

 —

0.2

ASTM D95

 

Download the MSDS fo Bitumen RC70

msdsd ownload