Application and Technology of Gradation Adjusting for Asphalt Mixing Units

The gradation of asphalt mixture is fundamental performance characteristic. The key techniques are proportion control in gradation adjusting and effective operation, such as cold bin gradation control depending on scientific target proportion, hot bin gradation control depending on accurate production proportion. Through the analysis of principle for asphalt mixing units gradation, the potential varieties and adjusting measures of gradation are studied. The advantages of analytical method using computer program in gradation design compared with traditional trial method and graphic method are given.