Accession Number:

ADA023968

Title:

Comparison of 4-1/2- and 7-In. (6-In. Nominal) Maximum Size Aggregate Mixtures for New Lock and Dam No. 26, Mississippi River.

Descriptive Note:

Final rept.,

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s):

Report Date:

1976-04-01

Pagination or Media Count:

20.0

Abstract:

Three sets of concrete mixtures were proportioned with each of the three water-cement WC ratios 0.5, 0.7, and 0.8 by weight of cement plus pozzolan. Each set consisted of two mixtures, one containing 4-12-in. and the other one 7-in. 6-in. nominal maximum size aggregate MSA. The slump of each mixture was 1-12 plus or minus 12 in., and the air content was 5.0 plus or minus 1 percent on the minus 1-12-in. portion of the mixtures. Two batches of concrete were made for each mixture with a 0.7 and 0.8 WC ratio, and one batch was made for each mixture with a 0.5 WC ratio by weight. Six- by twelve-in. cylindrical specimens were cast and tested for strength at 28, 90, and 365 days age, and block specimens 3 by 3 by 1.5 ft were made to compare workability.

Subject Categories:

  • Civil Engineering
  • Construction Equipment, Materials and Supplies

Distribution Statement:

APPROVED FOR PUBLIC RELEASE