The uniformity of concrete mixture

The uniformity of concrete mixture directly affects the performance of hardened concrete, and the poor uniformity of concrete mixture inevitably leads to the uneven distribution of each component of hardened concrete. From the point of view of strength, the concrete with good homogeneity is evenly distributed, and the water-glue ratio of each part is not very different, and the strength of each part is evenly distributed. If concrete mixes content evenly qualitative sex is poor, so that produce segregation, when stratification, the water glue ratio of different place is not identical, water glue ratio of some areas is obviously larger, the strength of its concrete may also be under design strength. For a concrete project, the damage often starts from the weakest part, and the area with large water gel has become the weakest area. The performance of concrete in this area determines the performance of concrete project. Poor uniformity of concrete mixture, segregation, stratification of concrete hardening process caused by inconsistent shrinkage deformation is an important reason for concrete cracking. The concrete mixture with poor uniform quality is mixed, in pouring, vibrating process, aggregate sinks, moisture moves up, in hardening process, the lower part with more aggregate falls in aggregate constraint, contraction deformation is smaller. On the contrary, the upper concrete due to less aggregate and more water, dry shrinkage deformation is larger, in the tensile area will produce cracks.