After decades of development, both the mix proportion and production process of concrete are relatively mature.
However, the uneven quality and frequent fluctuations of raw materials, as well as the frequent occurrence of concrete quality problems caused by untimely or inadequate adjustment of concrete mix proportion, are the current difficulties in concrete quality control.
For example, the phenomenon of pipe blockage caused by poor aggregate wrapping, segregation, bleeding, or significant loss of slump over time in concrete mixtures is rampant.
The problem of unqualified engineering quality caused by fluctuations in raw materials, such as insufficient strength of concrete test blocks to meet design requirements or large strength dispersion, is not uncommon.
With the increasing efforts in environmental protection, unstable raw material quality has become the norm.
Understanding the current status of concrete raw materials, adapting concrete production to fluctuations in raw material properties, and improving concrete quality are of great significance.
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