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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 30/45 Bitumen? Specifications, Applications and Comparison with 40/50 and 60/70

What Is 30/45 Bitumen? Specifications, Applications and Comparison with 40/50 and 60/70

30/45 bitumen is a penetration-grade paving binder identified by its penetration range under specified test conditions. This guide explains what the 30/45 designation means, the key quality tests used to evaluate the binder, its use in asphalt and road construction, and how it differs from 40/50, 60/70 and Performance Grade bitumen.
September 27 2026 More
How to Select the Right PG Bitumen Grade: Climate, Traffic and Project Conditions

How to Select the Right PG Bitumen Grade: Climate, Traffic and Project Conditions

Selecting a PG bitumen grade requires more than choosing a familiar product designation. The correct Performance Grade depends on expected pavement temperatures, traffic conditions, project specifications and pavement requirements. This guide explains how PG numbers work, how climate and loading affect binder selection, and what information buyers should provide before requesting a suitable grade.
September 20 2026 More
Bitumen vs Asphalt: What’s the Difference? Composition, Uses, Grades and Applications

Bitumen vs Asphalt: What’s the Difference? Composition, Uses, Grades and Applications

Bitumen and asphalt are often confused, but they are not the same material. Bitumen is the binder used to hold aggregates together, while asphalt is the finished paving mixture made from aggregates and bitumen. This guide explains their composition, applications, key differences and the role of bitumen grades in asphalt production.
September 12 2026 More