If you’re like most people, you probably don’t know and don’t even care about concrete and how it affects building construction. But if you are in the construction industry or program building services, you already know that concrete is important and concrete testing by CSI Concrete Testing Services, even more.
Why do we need to do concrete testing? Concrete is tested to ensure that the concrete that was bought from the manufacturer/supplier is the same material brought to the job site. There are a dozen different test methods for concrete that is freshly-mixed. There are at least another dozen tests that are unique to groups like the Army’s engineering, among others, for concrete.
The Slump Test
One of the most frequent tests for freshly-mixed concrete is the slump test. Other common tests include unit weight, air content, and comprehensive strength tests.
Slump refers to consistency or the concrete’s ability to flow. In case the concrete is unable to flow because the slump or consistency is not too high, there are possible issues with proper consolidation. In case the concrete won’t stop flowing, there are possible difficulties with mortar loss.
Air content quantifies the total air content in a sample but is not an indicator of the final in-place air content, because air is lost during handling. According to current building codes, an of concrete can be used for construction as long as no test is below 500 psi below the prescribed design strength or that three consecutive test show that the concrete is equal in strength or exceeds the design strength.
However, the strength of concrete can be reinforced by adding cement. Cement binds the concrete aggregates together. Adding more water can adversely affect the physical property of the concrete.
The strength of concrete can be measured 28 days after being poured. At this time, the construction company needs to write to the authorities.