Title: High Strength Lightweight Aggregate Concrete for Arctic Applications--Part 1: Unhardened Concrete Properties

Author(s): George C. Hoff

Publication: Symposium Paper

Volume: 136

Issue:

Appears on pages(s): 1-66

Keywords: air entrainment; arctic concrete; blast furnace slag; silica fume; cold weather construction; compressive strength; drying; harbor structures; freeze-thaw durability; high-strength concrete; lightweight aggregates; fly ash; marine atmospheres; offshore s

DOI: 10.14359/4008

Date: 1/1/1993

Abstract:
First of a three-part paper presents the results of a joint industry project to develop high-strength lightweight aggregate concrete for use in the Arctic. Lightweight aggregate selection tests, high-strength mixture development with the selected aggregates, batching procedures, unhardened properties of the 110 batches made during the program, and the temperature development of the mixtures in large concrete sections are described. Both crushed and pelletized lightweight aggregates were used with supplementary cementing materials and high-range water reducers to produce concretes with compressive strengths from 8000 to 11,000 psi (55 to 76 MPa). Also evaluated was the influence of pumping on the aggregate moisture content, slump, unit weight, air content, and concrete strength. The effects of the air void system in the hardened pumped concrete with respect to freezing and thawing durability and the drying behavior of a large concrete section were also evaluated.