CC Field Test—Floor Placement #2

For every 100 yards of concrete delivered, a sample is taken for testing purposes. Shown here, workers are measuring the slump of the concrete by packing a slump cone, removing it when full, and measuring how much the concrete spreads. Measuring the amount of air in the concrete also is required so an air pot is packed with concrete and consolidated with a rod used for the slump cone, one third of the pot at a time. After the top is put on the pot and the air removed above the concrete, a known amount of air pressure is applied and the air content of the concrete can be determined. For this project, all air readings came in between 1% and 2%. Four cylinders also were packed with concrete. Compression strength was checked at seven days and 28 days.

Category:

Education

Tags:

• concrete construction
• concrete
• testing
• curling
• shrinking
• building
• construction
• loading docks
• cement
• cement construction
• concrete building
• floor
• setting floor