title: Mechanical properties of recycled concrete in marine environment.
abstract: Experimental work was carried out to develop information about mechanical properties of recycled concrete (RC) in marine environment. By using the seawater and dry-wet circulation to simulate the marine environment, specimens of RC were tested with different replacement percentages of 0%, 30%, and 60% after immersing in seawater for 4, 8, 12, and 16 months, respectively. Based on the analysis of the stress-strain curves (SSCs) and compressive strength, it is revealed that RC' peak value and elastic modulus decreased with the increase of replacement percentage and corroding time in marine environment. And the failure of recycled concrete was speeded up with more obvious cracks and larger angles of 65° to 85° in the surface when compared with normal concrete. Finally, the grey model (GM) with equal time intervals was constructed to investigate the law of compressive strength of recycled concrete in marine environment, and it is found that the GM is accurate and feasible for the prediction of RC compressive strength in marine environment.
authors.affiliation: College of Civil Engineering, Tongji University, Shanghai 200092, China. 260070860@qq.com
authors.forename: Jianxiu
authors.initials: J
authors.lastname: Wang
authors.forename: Tianrong
authors.initials: T
authors.lastname: Huang
authors.forename: Xiaotian
authors.initials: X
authors.lastname: Liu
authors.forename: Pengcheng
authors.initials: P
authors.lastname: Wu
authors.forename: Zhiying
authors.initials: Z
authors.lastname: Guo
mesh_terms: D019245:Compressive Strength; D003252:Construction Materials / Q000032:analysis*; D003343:Corrosion; D017753:Ecosystem; D055119:Elastic Modulus; D008422:Materials Testing; D009792:Oceans and Seas; D016062:Porosity; D059027:Recycling; D012623:Seawater / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties