Understanding Its Meaning, Properties, and Specifications

Introduction

Cutback Bitumen MC70 plays a crucial role in road construction, with different grades serving specific purposes. One such grade, MC-70 bitumen, is widely used as a primer and for dust control on unpaved roads. In this detailed guide, we’ll delve into its applications, properties, and proper usage to enhance your understanding of this essential construction material.

Applications of Cutback Bitumen MC70 

MC-70 bitumen, also known as MC-70 asphalt, acts as a primer in road coating processes. It is heated and sprayed onto the road base before the final asphalt layer is applied. With a kinematic viscosity ranging from 70 to 140, MC-70 effectively coats and bonds loosely bonded and fine-grained soils like well-graded sand. However, it’s crucial to note that for densely graded base courses, MC-30 cutback bitumen is more suitable.

Additionally, MC-70 Asphalt is utilized for dust control on unpaved roads. It’s important to be aware that some countries prohibit its use due to the hazardous solvents present in cutback bitumen.

Proper Handling and Usage of Bitumen MC70 

Before proceeding with the application, it’s essential to consider the following points:

Recommended Application Temperature: MC-70 should be applied at a temperature of 50°C.

Surface Preparation: Ensure that the surface is clean before applying it as a prime coat. Heat the primer adequately for efficient spraying.

Road Base Application: When using MC-70 Asphalt on a road base, maintain the surface temperature at 10°C and ensure cleanliness for optimal results.

Pricing and Packing of  Cutback MC-70

When focusing solely on MC-70, it presents specific characteristics and considerations regarding pricing, packing, and handling. It is known for its competitive pricing, making it an economical option for a wide range of road construction endeavors. In terms of packaging, MC-70 is available in user-friendly options that facilitate easy transportation and storage convenience. Contact our dedicated sales team for quotes and placing orders

Comparison with Other Bitumen Grades

When comparing MC-70 Asphalt with other grades such as MC-30, it’s important to note that each grade offers unique advantages and considerations. While MC-30 bitumen may excel in pricing, packaging, and handling aspects, MC-70 stands out for its specific applications in road construction, particularly as a primer and for dust control. The choice between these grades often depends on the specific requirements of the project, with factors such as climate, soil conditions, and intended usage playing a significant role in decision-making. By understanding the distinct characteristics of each grade, construction professionals can make informed choices to ensure optimal performance and cost-effectiveness in their projects.

Specification of Cutback Bitumen MC70

Property	specification limit		Test method
	Min	Max
Kinematic viscosity at 60°C ,cST	70	140	ASTM D2170
Flashpoint(tag open cup), °C	38	—	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	—	20	ASTM D402
	10	70
	65	93
	55	—
Test on Residue from distillation test
Viscosity at 140°F (60°C)	30	120	ASTM D2170
Penetration 77°F (25°C) 100g,5s mm	120	300	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