PRECAST CONCRETE UNITS USED AS FORMS FOR CAST-IN-PLACE CONCRETE

PRECAST CONCRETE UNITS, UNREINFORCED, REINFORCED, OR PRESTRESSED ARE USED AS FORMS FOR BOTH CAST-IN-PLACE AND PRECAST CONCRETE. THIS REPORT DEALS WITH PRECAST UNITS AS FORMS FOR CAST-IN-PLACE WORK, SHOWING HOW SUCH UNITS ARE USED: (1) AS STRUCTURALLY ADEQUATE FOR APPLIED LOADS AND CONCRETE PRESSURES WITHOUT SUPPORT EXCEPT TIES AND ALIGNMENT BRASES, OR (2) AS LINERS FOR FORMS MADE OF OTHER MATERIALS. THESE CONCRETE FORMS MAY EITHER BE REMOVED AFTER OR REMAIN IN PLACE AS A PERMANENT PART OF THE STRUCTURE. A PRINCIPAL APPLICATION OF STAY-IN-PLACE FORMS HAS BEEN AS ARCHITECTURAL FACING, BUT SOME STAY-IN-PLACE FORMS ALSO BECOME STRUCTURALLY COMPOSITE WITH THE CAST-IN-PLACE CONCRETE. THIS REPORT SURVEYS DEVELOPMENT OF VARIOUS TYPES OF PRECAST FORMS INCLUDING FERROCEMENT AND FACING SLABS FOR MASS CONCRETE AND HYDRAULIC STRUCTURES, BUT CONCENTRATES ON STRUCTURAL AND ARCHITECTURAL USES WHICH HAVE BEEN MOST PREVALENT IN THE UNITED STATES AND CANADA. TYPICAL FRAMEWORK INSTALLATIONS ARE DESCRIBED AND FACTORS INFLUENCING THEIR USE ARE DISCUSSED. ALSO, DESIGN AND CONSTRUCTION REQUIREMENTS FOR THIS TYPE OF FORMWORK ARE OUTLINED AND SUGGESTIONS ARE MADE FOR HANDLING, ERECTION, AND USE OF PRECAST FORMS. RECOMMENDATIONS ARE GIVEN FOR TREATMENT OF JOINT AND CONNECTION DETAILS AND FOR BOND ANCHORAGE OF THE FORM UNITS. /ACIJP/

• Supplemental Notes:
  • Vol 66, No 10, PP 798-813, 11 FIG, 32 REF
• Publication Date: 1969-10

Media Info

• Serial:
  • Am Concrete Inst Journal & Proceedings

Subject/Index Terms

• TRT Terms: Anchorages; Bonds; Cast in place structures; Concrete forms; Formwork; Frames; Hydraulic structures; Mass concrete; Precast concrete; Prestressed concrete; Slabs
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213445
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 9 1970 12:00AM