The failure of asphalt and because it has repeatedly raised by experts not once but many times, the media have repeatedly said and wrote it, but the result did not change. Indeed, what's the problem?
Nazar beygy engineer says: "In the world, more than 7 types of bitumen that is produced depends on the weather and the conditions used in our country after the revolution was limited to two types of its production due to high cost. Currently bitumen 100/85 and 70/60 with low permeability, with permeability of less than is produced. According to this classification in cold areas, and tropical tar bitumen 100/85 to 70/60. "
He added: "The current production is not enough. We need to diversify our bitumen production. In the southern regions of Ahwaz and Khorramshahr bitumen 50/40 or 30/20 should be applied not produced in the country. "
Rigid asphalt and bitumen would lose their resistance against heat and cold. In regional cold desert nights, asphalt, and heat shrink material from days apart and full of cracks and holes that we see. Mr. Nazar beygy flexibility in increasing endurance asphalt bitumen considers important. In this section there is a lot of information "in other countries to increase the flexibility of the polymer bitumen is added.
The bitumen to increase flexibility. Great multi bitumen production in the developed countries and not extraordinary hard work, they know that asphalt for 5 years should be repaired or carving, so that in 20 years increases pavement life, the restoration and maintenance and repair are also not missing . "
Head of road bitumen Petroleum Industry Research Unit, says: "Apart from infrastructure and asphalt pavement bed preparation is also important.
Production of it in the asphalt 4 to 5 percent and 96 percent other materials used in many of the errors drainage, inadequate infrastructure, lack of attention to the traffic load and inconsistent implementation of returns projects. The asphalt is not very principled performance, profit has prompted many criteria be ignored. "
And why not objected to the manner of the performance of contractors? A question that the answer is not complicated. Nazar beygy engineer says: "No accountability, oversight principles do not."
Perhaps this is true, according to Engineer Nazar beygy sharing and group work in our country will not be without its drawbacks. When several contractors are working to road to be paved streets and no way to guess the outcome in advance. "The streets are full of small and large cracks that experts have different names for it."
Head of road bitumen Petroleum Industry Research Unit, says: "We have 20 left, including left transverse, longitudinal, flexibility, alligator and reflection that there is a specific reason."
Tehran, has long experience of the Turks and their work was deep pits that should be thought about her sooner; city streets should not be forgotten. "Asphalts demand attention." It's to remember