SAND SLURRY APPROACH OFFERS SOUND SOLUTION TO SMALL ROADWAY CUTS

A project is described in which sand slurry and sand combination used as trench backfill, restored smooth pavement following a utility installation. The technique typical for narrow, shallow slits for water or other utility lines on busy streets, is sand/water jetted to 95 percent compaction. Normally, the sand is capped with about 6 in. of concrete and resurfaced with 1/2 to 3/4 in. of asphalt. When sand slurry is used, slots 4 to 6 in. wide and about 12 in. deep are saw-cut. After installation of the conduit or small pipe, these are backfilled with a slurry consisting of about one sack of cement for every yard of sand. The slurry is placed from the chute of a transit mix truck. For trenches up to approximately 30 in. wide, water jetted sand backfill offers a fast job that requires no post-job follow-up to compensate for settling. Sand is jetted with water through a 4 ft. length of 1-1/2 to 2 in. pipe. The botton of the pipe is swaged into the form of a slit-like opening. This is forced randomly into the trench until the desired saturation is achieved. backfill sand specifications call for granular material.

• Corporate Authors:

  McGraw-Hill, Incorporated

  330 West 42nd Street
  New York, NY  United States  10036
• Publication Date: 1975-8

Media Info

• Features: Figures; Photos;
• Pagination: p. 59
• Serial:
  • Construction Methods and Equipment
  • Volume: 57
  • Issue Number: 8
  • Publisher: McGraw-Hill, Incorporated

Subject/Index Terms

• TRT Terms: Asphalt; Compaction; Concrete; Conduits; Excavations; Granular materials; Pipe; Public utilities; Sand; Slurry; Trench backfill; Underground structures; Urban areas; Water
• Uncontrolled Terms: Utilities
• Old TRIS Terms: Slurries
• Subject Areas: Bridges and other structures; Construction; Highways;

Filing Info

• Accession Number: 00127483
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 10 1976 12:00AM