No matter SMA or Superpave pavement technology is adopted, asphalt road surface of high way has a high requirement for aggregate shape and size proportion, especially for content of thin and flaky grain. Under this condition the traditional technics adopting impact crusher can not meet the requirement, new crushing and screening techinics adopting VSI sries vertical shaft impact crusher is developed by our company, which can meet highway pavement perfectly.

High aggregate quality, content of thin and flaky grains less than 5%. Jaw crusher and cone crusher crushing technics is used in a dolerite mine in Africa, among finished products content of thin and flaky grains is more than 10%, thus bag sales is resulted.After technology reconstruction using VSI vertical shaft impact crusher in this time, content of thin and flaky grains be reduced to 4.7%.

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