AIR VOID SYSTEMS IN READY-MIXED CONCRETE

CONCRETE PRODUCED IN TRUCK MIXERS AT A COMMERCIAL BATCH PLANT WAS SUBJECTED TO EXTENSIVE TESTING FOR THE PROPERTIES OF THE ENTRAINED AIR SYSTEM, FROST RESISTANCE, AND COMPRESSIVE STRENGTH. SIXTY 6-CUBIC YARD BATCHES OF SILICEOUS AGGREGATE CONCRETE WERE INCLUDED IN THE PROGRAM. THE VARIATIONS IN THE PROPERTIES UNDER INVESTIGATION COULD BE ATTRIBUTED TO DIFFERENT CHEMICAL TYPES OF AIR-ENTRAINING ADMIXTURES AND RETARDERS AND TO DIFFERENT MIXING METHODS. THE POWERS SPACING FACTOR, PHILLEO SPACING FACTOR, VOID SPACING INDICATOR (VSI) SPACING FACTOR, AND SPECIFIC SURFACE WERE USED AS INDICATORS OF THE QUALITY OF THE ENTRAINED AIR SYSTEM. IN ADDITION TO THE EFFECTS OF THE THREE VARIABLES ON THE AIR VOID SYSTEM AND FROST RESISTANCE, SIGNIFICANT EFFECTS ON COMPRESSIVE STRENGTH WERE ALSO SHOWN. THE COMPARISON OF THE VSI SPACING FACTOR WITH FROST RESISTANCE SHOWS THAT THE VSI CAN BE A SIGNIFICANT AID IN DIFFERENTIATING BETWEEN FROST-RESISTANT AND NONFROST RESISTANT CONCRETE. /AUTHOR/

• Supplemental Notes:
  • Vol 5, No 2, PP 492-522
• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Ivey, D L
  • Torrans, P H
• Publication Date: 1970-6

Media Info

• Serial:
  • Journal of Materials
  • Publisher: American Society for Testing and Materials (ASTM)

Subject/Index Terms

• TRT Terms: Admixtures; Air entrainment; Air voids; Chemicals; Compressive strength; Frost; Mix design; Ready mixed concrete; Retarders (Concrete); Spacing; Testing
• Old TRIS Terms: Air voids content; Resistance; Retarders
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213744
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 21 1970 12:00AM