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As a creative and agile Iranian holding in the bitumen industry, DEJPA is among the first three producers in Iran with an export market, focusing on the field of bitumen and mulch. It is also known as a leading company in the field of technical and engineering services in the oil refining, bitumen and mulch industry, and it has made successful entries in the field of oil refining as business opportunities for the coming years.
Taking the lead in gaining market share in the current chain through increasing productivity, intelligence and innovation in supply, production and sales methods, as well as entering the oil refining chain in order to learn and build strategic capacity for the future of business.
43 YEARS OF COUNTINUES ACTIVITY IN BITUMEN PRODUCTION.
 
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What Is Bitumen 30/45? Technical Specifications, Applications, Difference from 40/60 and 60/70, and Buyer’s Guide

What Is Bitumen 30/45? Technical Specifications, Applications, Difference from 40/60 and 60/70, and Buyer’s Guide

Bitumen 30/45 is a hard penetration-grade paving binder commonly considered for hot-mix asphalt exposed to high pavement temperatures, heavy traffic and demanding loading conditions. This guide explains its technical specifications, applications, differences from 40/60 and 60/70, quality-control tests, COA review, storage, packaging and purchasing requirements.
July 18 2026 More
What Is Cutback Bitumen? RC, MC and SC Grades, Applications, Advantages, Limitations and Selection Guide

What Is Cutback Bitumen? RC, MC and SC Grades, Applications, Advantages, Limitations and Selection Guide

Cutback bitumen is produced by blending base bitumen with a petroleum solvent to temporarily reduce viscosity. This guide explains rapid-curing RC, medium-curing MC and slow-curing SC grades, their common applications, curing behaviour, advantages, limitations, quality-control tests, storage and safety requirements, and the information buyers should provide before ordering.
July 15 2026 More
What Is AC Bitumen? AC-10, AC-20, AC-30 and AC-40 Grades, Applications and Differences from VG and Penetration Grades

What Is AC Bitumen? AC-10, AC-20, AC-30 and AC-40 Grades, Applications and Differences from VG and Penetration Grades

AC Bitumen, or Asphalt Cement graded by viscosity, is classified mainly according to absolute viscosity at 60°C under the applicable specification. Grades such as AC-10, AC-20, AC-30 and AC-40 represent different viscosity levels and should be selected according to the project standard, climate, traffic, pavement design, asphalt-mixture requirements and construction conditions. This guide explains the AC grading system, compares the main grades, reviews the differences between AC, VG, penetration-grade and PG Bitumen, and outlines quality-control, storage, purchasing and pricing considerations.
July 13 2026 More