It became clear when I first entered the site to re-test the concrete admixtures.

items for on-site re-inspection of concrete admixtures: should be determined according to relevant standards. usually, the on-site re-inspection items for different admixtures are not exactly the same. generally common re-inspection items are:(1)ph value, density (or fineness), water reduction rate, etc. (2) early-strength superplasticizer increases the corrosion of steel bars and the ratio of 1d and…