Rhino Bitumen

After the private sector started bitumen production from 1998 to 2005, exports continuously increased. Iran’s bitumen exports gradually increased to 1 million tons throughout these years, and reached over 3 million tons . 80 countries currently demand bitumen.
In order to compete with larger companies on price, small producers have degraded bitumen quality before export by mixing the main bitumen with products such as mineral bitumen, sulfur, and others. This resulted in countries such as China, Malaysia, African countries and others, who were once Iran’s main consumers, restricting their imports from Iran or conditioned it on stringent tests and sampling.
Since branding in Iran associates the product with Iran instead of the producer, the country’s export market was seriously harmed and brought about conditions in which importers were unwelcoming of the bitumen from the largest and oldest producers, and concluded that Iran’s bitumen lacked quality, which tainted the Iranian brand.
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Bitumen emulsion is a two-phase mixture of bitumen and water made using emulsion material. In this mixture, bitumen does not dissolve in water but rather is suspended in very small globules. In some cases, a stabilizer could be used in addition to the emulsifier. Bitumen color before use is brown, and turns black after curing and water evaporation.
Bitumen Emulsion Types
Bitumen emulsion can be categorized according to setting speed and electrical charge of suspended particles:
A) classifying bitumen emulsions in terms of demulsification speed
After using the bitumen emulsion on the intended surface, the water present in the mixture separates and evaporates and the bitumen gradually coats the road surface and around the aggregates, which is known as demulsification. Bitumen emulsion are divided into three main groups in terms of stability, namely rapid-setting (unstable), medium-setting (semi-stable), and slow-setting (unstable), each with various subcategories.

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