now danesh bayan company is recycling asphalt by making a product called jovansaz asphalt. exactly the same old asphalt with these ingredients, the percentage is very low. we do a little mixing and apply the same asphalt. again , the road surface, by making this product, in addition to protecting the environment , the consumption of fine sand is saved a lot. approximately 40 million tons of fine sand are used annually for the road construction project. these 40 million tons are used. shenu maseh is preserved in the country and the same old asphalt with exactly the same asphalt with the quality of new asphalt. it can be recycled and the other product of this company is a polymer that improves the quality of bitumen. it reacts with any type of bitumen and increases the quality of others. we have problems in many places. in barts, due to the braking and the weight of the cars , the asphalt surface changes its shape. this is because it returns to its original state. after an unlimited period of time, no change in shape can be seen. this polymer has been used in some road constr