Properties of concrete incorporating fine recycled aggregates from crushed concrete wastes

• Published in: Construction & building materials Vol. 112; pp. 708 - 715
• Main Authors: Fan, Cheng-Chih, Huang, Ran, Hwang, Howard, Chao, Sao-Jeng
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2016; Elsevier B.V
• Subjects: Aggregates (Building materials); Analysis; By-products; Compressive strength; Concrete; Fine recycled aggregate; Initial surface absorption; Mechanical properties; Production management; Properties; Recycled concrete; Resistivity; Ultrasonic pulse velocity; Waste management; United States; Compressive strength; Recycled concrete; Ultrasonic pulse velocity; Resistivity; Fine recycled aggregate; Initial surface absorption
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2016.02.154

•Two types of FRAs (R1 and R2) from crushing concrete wastes were used in the study.•Crushing processes have significantly influence on the quality of FRAs.•FRA replacement ratio is an important factor affecting the properties of the resulting concrete.•Concrete specimens containing R2 have a superior quality than that containing same amount of R1. Fine recycled aggregates produced by crushing concrete wastes can be used as a replacement for fine natural aggregates for manufacturing concrete. Two methods were adopted for production of fine recycled aggregates from crushed concrete wastes: first, produces coarse as well as fine aggregates (R1); second, produces only fine aggregate (R2). Test results demonstrate that the fine recycled aggregate replacement ratio is an important factor affecting the physical, mechanical and durability of resulting concrete. Furthermore, concrete specimens containing R2 have a superior quality than concrete specimens containing same amount of R1.