Frequently asked questions

Q: Are the protective layers applied using special machinery? 

Yes, bitumen relay tanker and sprayer and chip seal machines are used for this purpose, and the asphalt must be compacted using rubber-tire and steel-wheeled rollers.


 Q: Can protective coating be applied to all roads with worn-out asphalt? 

 The protective coating can be applied to all types of roads, however, it is recommended to be used on roads with less traffic, such as secondary and rural roadways.

Q: Does a newly installed asphalt need protection?

 No, newly installed asphalts do not require sealcoating, unless the road surface is damaged, for example due to bad installation.

Q: What is asphalt protective coating?

As its name suggests, sealcoating will protect the asphalt against further damage, thus extending the useful life of the asphalt and creating a suitable surface for the traffic.

Q: Can the bitumen emulsion be kept in tanks that were used for storing other types of bitumen?

 Yes, only after the full removal of the former bitumen from the tank.

Q: If the bitumen emulsion was to be used in winter, does the emulsion type need to be changed? 

No, but the producer must be informed to slightly increase its resistance against cold.

Q: Is it possible to restored and reused broken bitumen? 

No, this is not possible.

Q: We purchased emulsion bitumen a few months ago, how can we know whether it is spoiled or broken? 

Simply by looking at it. If the emulsion was broken, the water and bitumen would be separated.

Q: Can the bitumen emulsion be transported in long distances? 

 Yes, the distance or the jerking motions of the vehicle during transportation will not break the bitumen emulsion, rather it might increase its durability.

Q: The color of the emulsion bitumen that we purchased has tuned brown. Is it spoiled?

No, the color of bitumen emulsion is brownish black, but it will be completely black when it is broken.

Q: Are there polymer-modified bitumen emulsions?

Yes, using latex or other types of polymer, it is possible to produce polymer-modified bitumen emulsions.

Q: With respect to ionic properties, how many categories of bitumen emulsion are there?

1. Ionic emulsions, which are no more being produced in Iran and most other countries; 2. Cationic emulsions, which have wide applications, and are produced in Iran and other countries around the world.

 Q: What is bitumen cutback?

Cutbacks are produced through resolving penetration grade bitumen in solvents such as diesel fuel, oil, and gasoline.

Q: What are the uses of air blown bitumen?

Usually, they are used for isolation and waterproofing.

Q: What is vacuum bottom?

Vacuum bottom is one of the main bases of bitumen production.

Q: Can all types of penetration grade bitumen with different penetration grades be turned into bitumen emulsion or cutbacks?

Yes, this is possible for all types of penetration grade bitumen.

Q: Can gilsonite be used for production of bitumen emulsion and/or bitumen cutbacks?

No, this is not possible due to high impurity of gilsonite.

 Q: Does your company hold certificates necessary for production of bitumen emulsion? 

Yes, in addition to operation license, this company holds the European ISO, CE and mandatory standards certifications.

 Q: Do the bitumen emulsion tanks have to be galvanized to prevent rusting ?

 No, normal tanks currently in use can be used to store bitumen emulsion.

Q: Are there any aggregates used in the protective coating layers? 

It can both include aggregates (sealcoat) and not include aggregates, using only bitumen emulsion (fog seal). The type of coating depends on the condition of the asphalt.

Q: How does the asphalt surface of the roadways get damaged?

The weather conditions and the traffic will damage the asphalt surface over time, reducing its useful life. These damages can be in the form of honeycombing and small cracks. Moreover, the sunlight, heat, and other weather conditions can undermine the quality of the bitumen.

Q: What is the difference between gilsonite and natural bitumen?

 They are both the same.

Q: Considering the presence of water in bitumen emulsions, can they withstand freezing?

No, bitumen emulsion must be kept above zero degrees Celsius.

Q: Does the bitumen emulsion need to be heated before installation?

Yes, the bitumen emulsion must be heated up to 60 degrees.

Q: We used bitumen emulsion as a prime coat, but it did not penetrate the base sufficiently ?

You might have chosen the wrong bitumen emulsion ,The fine grading of the base might have left little or no space for the emulsion to fill ,Water spraying the base can help increase permeability.