Open AccessAcoustic emission properties of different mineral admixture concrete
Author(s) -
Jiapeng Li,
Lei Qin,
Pingping Sha,
Shidong Sun
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/612/2/022105
Subject(s) - acoustic emission , compressive strength , fly ash , materials science , mineral , durability , composite material , amplitude , metallurgy , optics , physics
To study the different mineral admixtures on the mechanical behavior of concrete, in this paper, three groups C20 concrete cubes made of different mineral admixtures were cast. The size of the cubes are all 150×150×150mm. Acoustic emission by uniaxial compressive test to study the different mineral admixtures on concrete mechanics performance and acoustic emission parameters (amplitude, energy, frequency) were studied. The results show that the addition of mineral powder to the concrete surface will increase the compressive strength of the early age (before 56d). Adding fly ash to the concrete will increase the compressive strength of the late age (after 90d). By combining fly ash and mineral powder, the compressive strength and durability can be better improved; and as the age goes by, the acoustic emission amplitude and dominant frequency of different mineral admixture concretes are increased. The dominant frequency of the compound concrete is greater than the dominant frequency of the single concrete.