Title:
Flowable Backfill for Pipeline Bedding at the Denver International Airport
Author(s):
D. A. Clem, K. D. Hansen, and J. B. Kowalsky
Publication:
Symposium Paper
Volume:
150
Issue:
Appears on pages(s):
87-96
Keywords:
backfilling; bedding; mix proportioning; pipes (tubes); quality control; slurries; soil cement; tests; Construction
DOI:
10.14359/4609
Date:
6/1/1994
Abstract:
The new Denver International Airport (DIA) has used the world's greatest volume of flowable backfill, estimated at 450,000 yd 3. For one of the initial projects, more than 70,000 yd 3 of flowable backfill were utilized as a bedding material for a concrete pipe drainage system located beneath the taxiways at DIA. The project is unique due to the large volume of flowable backfill required for a single contract, use of on-site sand, and the efficiency of the mixing and placing operation. Paper presents a case study of the project, including mix designs, cost, mixing operation, placing, quality control, and properties of the in-place material.