construction, cement, concrete
In the US, the predominate method for testing concrete strength is ASTM C31 and C94. C94 provides the general procedures necessary as C31 provides field methods. Generally speaking, concrete strength is directly related to water / cement ratios. The less water in the mix, the greater the strength. However, more water makes the concrete easier to place and finish. Superplasticizers are admixtures that improve concrete workability without adding water. There are also a variety of materials that can be added to concrete to increase strength in addition to a low water/cement ratio (0.35 or less). The number and explanation behind those materials and methods are beyond the scope of what can be covered here. But let it be understood the standard 3000psi concrete can be formulated to provide compressive strengths of 6000psi and more.
...do the concrete cube test.....different countries have different standards... ,,generally...the cement acts as the bonding agent for the concrete mixture..and thus the main factor that determines the resistant factor to resist compression...
