What are the most common tests for fresh concrete ?

Slump , air content , unit weight and compressive strength test are the most common tests

• Slump is a measure of consistency , or relative abiliry of the concrete to flow , If the concrete can't flow because the consistency or the slump is too low , there are potential problems with proper consolidation . If the concrete won't stop flowing because the slump is too high , there are potential problems with mortar loss throught the formwork , excessive formwork pressures , finishing delays and segregation
• Air content measures the total air content in a sample of fresh concrete , but does not indicate what the final in-place air content will be , because a certain amoint of air is lost in transportation , consolidating , olacement and finishing . THree field tests are widely specified : the pressure meter and volumetric method are ASTM standards and the chace Indicator is an AASHTO procedure .