Bond strength and flexural capacity of normal concrete beams strengthened with no-slump high-strength, high-ductility concrete

Tian Feng Yuan, Se Hee Hong, Hyun Oh Shin, Young Soo Yoon

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

This study investigates the flexural behavior of normal-strength concrete (NSC) beams that were strengthened with no-slump, high-strength, high-ductility concrete (NSHSDC). A set of slant shear tests was performed to investigate the initial performance of the NSC substrate strengthened with NSHSDC. Slant shear tests considered two types of roughness of interface and five angles of the interface between NSC and NSHSDC. The test results showed that except for specimens with a 75° interface angle, the specimens with high roughness were conformed to the properties (14-21 MPa for 28 days) of the ACI Committee 546 recommendation. For flexural strength tests, NSC beams strengthened with an NSHSDC jacket on the top and bottom sides, three sides, and four sides resulted in strength increments of about 8%, 29%, and 40%, respectively, compared to the beams without NSHSDC jacket. Therefore, the use of NSHSDC is an effective method to improve the performance of NSC beams and is recommended for strengthening reinforced concrete members.

Original languageEnglish
Article number4218
JournalMaterials
Volume13
Issue number19
DOIs
Publication statusPublished - 2020 Oct

Keywords

  • Flexural strengthening
  • Interfacial shear strength
  • No-slump, high-strength, high-ductility concrete
  • Normal-strength concrete beams
  • Roughness

ASJC Scopus subject areas

  • Materials Science(all)

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