The aggregate industry must produce the sizes in demand in such a way that they meet specified requirements and also satisfy environmental and labour safety standards. In spite of mechanisation measures, costs will rise due to increasingly stringent standards and higher maintenance costs. Function and efficiency of the screens are vital for the quality of aggregate. Tests have been made in conjunction with computer programs to evaluate the various factors. It is found that, with a satisfactory raw material, good screening results are possible over short screen lengths. Charge thickness has an upper limit above which results rapidly deteriorate. In the case of poor raw materials it is practically impossible to obtain good results even if capacity is reduced or screen length increased, and the flow sheet must be revised. Since most planning is done by means of a special computer program, alternatives can be tested quickly and experience from these tests compared with screen size calculations. Most crusher plants face the problem of adapting total production to variations in market demand. Development work in the crusher industry would be assisted by standardisation with a view to cutting the number of surfacing and concrete grades. /TRRL/

  • Corporate Authors:

    Svenska Vagforeningen

    Fridhemsgatan 15
    11240 Stockholm K,   Sweden 
  • Authors:
    • Hagtorn, B
  • Publication Date: 1975


  • Swedish

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00129982
  • Record Type: Publication
  • Source Agency: Swedish National Road and Traffic Research Institute
  • Files: ITRD, TRIS
  • Created Date: Apr 7 1976 12:00AM