Blogs

Knowledge-based recognition goes beyond modern equipment or technical expertise. This article explains how technology capability, R&D, innovation, technical evidence, and commercialization shape the evaluation of knowledge-based companies—and what this recognition means for industrial companies such as Dejpa.

The cheapest bitumen is not always the lowest-priced product. This guide explains how buyers can evaluate bitumen prices by considering grade, quality specifications, packaging, transportation, supplier reliability and total procurement cost to make better purchasing decisions.

Bitumen does not have one universal shelf-life period. Its condition during storage depends on factors such as temperature, exposure to air, contamination, packaging integrity and product type. This guide explains how proper storage and packaging can help protect bitumen quality before use.

Learn how to choose the right bitumen export packaging method. This guide compares bulk bitumen, drums, and jumbo bags based on transportation, storage, handling, and international supply requirements.

Selecting the right bitumen grade is critical for asphalt pavement performance and durability. This guide explains the differences between penetration grades such as 40/60, 60/70, and 80/100, as well as Polymer Modified Bitumen (PMB) and Performance Grade (PG) systems, helping buyers and engineers choose the most suitable binder based on climate, traffic, and project requirements.

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.

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.

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.

Crumb Rubber Modified Bitumen, commonly known as CRMB, is a modified asphalt binder produced by combining base bitumen with processed crumb rubber from end-of-life tyres. This guide explains CRMB production through wet and dry processes, its potential benefits and limitations, common applications, quality-control tests, storage requirements, pricing factors and differences from polymer modified bitumen.