As early as 2014, it was explicitly stated in the document “Notice on Further Strengthening Concrete Quality Control” (Quality Assurance Letter [2014] No.
169) that the use of experience mix proportions is strictly prohibited.
.
Construction Precast Development
Precast News From China
As early as 2014, it was explicitly stated in the document “Notice on Further Strengthening Concrete Quality Control” (Quality Assurance Letter [2014] No.
169) that the use of experience mix proportions is strictly prohibited.
.