Low-Density Concrete Backfills for Lined Tunnels

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Title: Low-Density Concrete Backfills for Lined Tunnels

Author(s): George C. Hoff

Publication: Special Publication

Volume: 29

Issue:

Appears on pages(s): 221-252

Keywords: backfilling; cellular concretes; concrete construction; construction joints, density (mass/volume); formwork (construction); heat of hydration; high temperature; permeability; placing; pumped concrete; temperature; temperature rise (in concrete)

Date: 1/1/1971

Abstract:
Low-density concretes having an oven-dry unit weight of 50 lb per cu ft or less have been successfully used as backfills for lined tunnels. . .Because of the permeable nature of these concretes, free water contact situations should be avoided. Suggestions for avoiding most problem areas are provided.