Wikipedia entity: Concrete
Topics: construction; proportion; dosage
Original sentence: In normal use, admixture dosages are less than 5% by mass of cement and are added to the concrete at the time of batching/mixing.
Quantified sentence: In normal use, admixture dosages are tiny amount by mass of cement and are added to the concrete at the time of batching/mixing.
Quantifier: tiny
Percentage: 5%
Specificity: unable