Compaction Study of Zero-Slump Concrete.

摘要

Tests were conducted at the U. S. Army Engineer Waterways Experiment Station in September 1975 to determine the effectiveness of vibratory and static compaction rollers in the compaction of zero-slump portland cement concrete pavements. It was determined that heavy vibratory rollers were very effective in compacting the dry-mix concrete and that the strength properties (compressive strength and flexural strength) were somewhat higher than would have been obtained with a conventional mix of the same cement content having a slump in excess of 1 in. The surface smoothness, surface texture, and riding quality of the pavement were considered adequate for wearing surfaces of secondary roads and streets, haul roads, service entrances, tank trails, etc., and as a base for any pavement system. Indications are that considerable cost reductions in the construction of portland cement concrete pavements can be realized by use of dry (zero-slump) concrete mixtures placed and spread by base course or asphalt spreaders and compacted with heavy vibratory rollers. (Author)