Comparative experiments and engineering applications were performed to examine the effects of waste rubber,cork particles and hollow floating beads on the workability,mechanical,and sound insulation performance of recycled aggregate mortar,and expands the comprehensive utilization of multi-source solid waste.Rubber and cork particles increased the fluidity of the mortar mix and reduced its water retentivity,while the hollow floating beads can improve the fluidity and water retentivity of the mortar.With the addition of various damping materials,the apparent density and strength of the recycled aggregate sound insulation mortar are significantly reduced,but it can still meet the requirements of 28-day compressive strength of not less than 5 MPa.Rubber,cork particles and hollow floating beads can significantly improve the impact noise of high frequency band,middle and low frequency band and low frequency band,respectively.The comprehensive performance of sound insulation mortar mixed with 35％multiple damping materials(15％rubber+15％cork particles+5％hollow floating beads)is better than that of single damping mate-rial,and the impact sound pressure level is 9 dB lower than that of ordinary mortar with 30 mm thick.
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