Flexural behaviour of reinforced concrete beams strengthened by NSM technique using ECC

Abstract

Bendable concrete is also defined as engineered cementitious composites (ECC) because of its excellent flexibility and tight fracture width limitation. ECC is a mixture of the addition of Portland cement, silica sand, fly ash, and fiber types (polypropylene (PP) and polyvinyl alcohol (PVA)). The main objective of the research is to investigate the bending performance of a series of reinforced concrete (RC) beams. Which were externally bonded (EB) with steel bars using a near-surface mounted technique with ECC or Epoxy, and we came out with a result, which is the best method of strengthening used in this test. A total of 5 RC beams of 1500 mm in length, 150 mm in width, and 200 mm in height - including one control and four - were strengthened, prepared, and tested. The varied test parameters are the ECC mortar, Epoxy, and the different shapes of strengthening cross-section. The test results revealed that ECC is an ideal cement matrix for reinforcement applications where ECC mortar bonded with steel bars is used as external reinforcement. As a result, ECC has many attractive properties, such as high tensile ductility compared to ordinary concrete while maintaining compressive strength.

Keywords

• rc beam
• flexural strengthening
• engineered cementatious composites (ecc)
• near surface mounted (nsm)
• ansys
• ductility