GLASS FIBERS REINFORCE CONCRETE STRUCTURES

A HIGHLY ALKALI-RESISTANT GLASS COMPOSITION DEVELOPED IN THE UNITED KINGDOM MAY MAKE POSSIBLE THINNER HIGH-STRENGTH STRUCTURAL SHAPES AND PIPING FROM PRECAST CONCRETE. A COMPLEX SILICATE OF CALCIUM, ALUMINUM, AND MAGNESIUM MAY BE THE PRACTICAL REINFORCING GLASS. IT IS EASILY SPUN INTO FIBER AND IS COMPATIBLE WITH PORTLAND CEMENT. THE GLASS COMPOSITION BEING TESTED RESISTS ALKALI ATTACK. THIS GLASS CONTAINS NO BORON. SOME CEMENT SLABS HAVE BEEN TESTED WHICH CONTAIN ABOUT 5% GLASS FIBER. PRODUCED AS A CONTINUOUS FILAMENT 10 MICRONS IN DIAMETER, THE FIBER IS FED THROUGH A CHOPPER AND PLACED IN THE MOLD AS A MORE OR LESS PARALLEL DISTRIBUTION OF 2- TO 3-INCH LENGTHS. CEMENT MIX, OVER-MOIST TO ENSURE THOROUGH FIBER WETTING, IS THEN ADDED. THE FIBERS REMAIN PARTLY ORIENTED IN THEIR CEMENT MATRIX, ADDING FURTHER STRENGTH TO THE COMPOSITE. THESE SLABS SHOW A MODULUS OF RUPTURE OF 15,000 P.S.I. AFTER A MONTH'S HARDENING. THE FIBERS ARE DISTRIBUTED FAIRLY EVENLY THROUGHOUT THE SLAB CROSS SECTION IN THESE THIN SLABS. THICKER STRUCTURAL MEMBERS MIGHT BE REINFORCED BY ADDING GLASS FIBER TO A THIN LAYER AT THE SURFACE OF THE TENSION SIDE. PRODUCTION METHODS NEED TO BE DEVELOPED FOR INCORPORATING THE FIBER INTO SLABS AND INTO MORE COMPLEX SHAPES.

  • Supplemental Notes:
    • pp 53-54, 1 PHOT
  • Publication Date: 1966-10-24

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00213310
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 23 1994 12:00AM