AN INTRODUCTION TO CONCRETE IN THE FAR EAST. PART 1: AGGREGATES

This, the first of a series of articles deals with the properties of aggregates in areas east of Pakistan with an annual rainfall greater than 100 mm. The land is generally young and principally composed of young volcanic, igneous rocks, deeper seated igneous rocks and marine sedimentary rocks often completely folded and faulted in mountain chains. Three types of borrow pit or quarry are produced: rock quarries in bedrock, river sands and gravel pits and coastal plain sand and gravel pits. Reasonable aggregates can be found in most locations but care must be taken in testing and selecting because of the high proportion of weak and porous materials occurring in all sources. This is due to rock weathering of otherwise good rocks or naturally weak tuffs, pumices or young coral limestones. Sources may be contaminated by clay and organic materials and gap grading is common especially in the fine fractions. Hand crushing tends to produce a shortage in sand to 10 mm range and mechanically crushed sands are often very harsh. Tables are given to summarise suitable investigatory tests; suggested limits are given on aggregates for structural concrete under exposed conditions. (TRRL)

  • Availability:
  • Corporate Authors:

    Plenum Publishing Corporation

    233 Spring Street
    New York, NY  United States  10013
  • Authors:
    • FOOKES, P G
  • Publication Date: 1984-7

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 38-41
  • Serial:
    • CONCRETE
    • Volume: 18
    • Issue Number: 7
    • Publisher: THE CONCRETE SOCIETY
    • ISSN: 0010-5317

Subject/Index Terms

Filing Info

  • Accession Number: 00391215
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jan 30 1985 12:00AM