Chen Q, Yang X. A Study of Damage Mode Recognition of Polypropylene Fiber-Reinforced Recycled Aggregate Concrete Based on Principal Components of Acoustic Emission Signals. Arch. Acoust. [Internet]. 2026 Jun. 30 [cited 2026 Jul. 7];51(2):283-92. Available from: https://acoustics.ippt.gov.pl/index.php/aa/article/view/4407