Study on Damage Properties of Recycled Concrete Based on Acoustic Emission Technology
In order to explore the axial compression damage process of recycled concrete,considering basalt fiber and aggregate as the main factors,one natural concrete mix ratio and six recycled concrete mix ratios were designed.The severity of compression damage was evaluated by two indexes of concrete acoustic emission signal intensity HI and Sr,and the main factors affecting the acoustic emission b value of concrete were discussed.Additionally,the damage type of concrete was explored according to the acoustic emission RA-AF correlation analysis.The results show that the HI and Srvalues in J-1 and J-6 are low during the compression process of concrete.When the load level is0%-10%,the Srof concrete increases rapidly,and the HI and Srof basalt fiber to recycled concrete show a different law.The size of b value is greatly affected by coarse aggregate and aggregate mixture;the addition of basalt fiber reduces the early damage of concrete,but improves the shear-tensile activity of recycled concrete in the later damage.
recycled concretebasalt fiberthe degree of injuryacoustic emission(AE)
NETL
NSTL
万方数据
