Damping Properties of Recycled Aggregate Concrete and Simply-Supported Recycled Aggregate Concrete Slabs

doi:10.11908/j.issn.0253-374x.19183

Home > Archive>Volume 48, Issue 4, 2020 >498-505. DOI:10.11908/j.issn.0253-374x.19183

Damping Properties of Recycled Aggregate Concrete and Simply-Supported Recycled Aggregate Concrete Slabs
DOI:
                        10.11908/j.issn.0253-374x.19183
                    
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Author:
                        XIAO Jianzhuang1,2XIAO Jianzhuang
College of Civil Engineering, Tongji University, Shanghai 200092, China;State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
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XU Hao1XU Hao
College of Civil Engineering, Tongji University, Shanghai 200092, China
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LI Tan1LI Tan
College of Civil Engineering, Tongji University, Shanghai 200092, China
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WANG Chunhui1WANG Chunhui
College of Civil Engineering, Tongji University, Shanghai 200092, China
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XUE Songtao1XUE Songtao
College of Civil Engineering, Tongji University, Shanghai 200092, China
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Affiliation:1.College of Civil Engineering, Tongji University, Shanghai 200092, China;2.State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
Clc Number:TU375.2
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Abstract:

The effects of recycled coarse aggregate(RCA) replacement percentage, polymer damping material, boundary conditions and damage level on the damping properties of recycled aggregate concrete (RAC) material and slabs were studied by using suspension, cantilever, and simply-supported tests. On the material level, the test results show that the damping ratio of RAC increases with the increase of the replacement percentage of RCA. The damping ratio of RAC with 100% replacement of the RCA is increased by 30% compared with the referenced natural aggregate concrete. Adding rubber particles can significantly improve the damping ratio of RAC in the elastic stage. Adding polypropylene fiber has no remarkable effect on the damping ratio of RAC in the elastic stage. On recycled aggregate concrete slabs, it is found that the damping ratios of recycled concrete slabs increase first and then decrease with the increase of the damage degree. The relationship between the cracking behaviors and the change in damping ratios are identified by observing the development of cracks. It shows that the damping ratio of RAC slabs is related to the crack behaviors, thus the interface friction damping caused by the crack is an important factor affecting the damping ratio of RAC slabs.

Key words:recycled concrete;damping ratio;damping modified material;damage

Reference

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XIAO Jianzhuang, XU Hao, LI Tan, WANG Chunhui, XUE Songtao. Damping Properties of Recycled Aggregate Concrete and Simply-Supported Recycled Aggregate Concrete Slabs[J].同济大学学报(自然科学版),2020,48(4):498~505

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Received:May 13,2019
Revised:February 14,2020
Adopted:February 12,2020
Online: April 24,2020
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