Effect of Internal Reinforcement on the Tensile Characteristics of the UHP-SHCC Material

Baraghit, Ahmed; Afefy, Hamdy; Hussein, Mohamed; Elnagar, Amira

doi:10.21608/asge.2022.153613.1026

Effect of Internal Reinforcement on the Tensile Characteristics of the UHP-SHCC Material

Document Type : Original Article

Authors

¹ Structural Engineering Department, Faculty of Engineering, Tanta University.

² Structural Engineering Department, Faculty of Engineering, Tanta University, Egypt.

10.21608/asge.2022.153613.1026

Abstract

Ultra-High-Performance Strain-Hardening Cementitious Composites (UHP-SHCC) is one form of fiber

reinforced composites, which has high compressive and tensile strengths along with high strain capacity

in tension with strain hardening plateau. Obviously, proper selection of strengthening/retrofitting material

plays an important role in restoring the lost capacity of the strengthened/retrofitted member. This paper

investigated experimentally the effect of internal reinforcement in the UHP-SHCC specimens on the

tensile strength as well as the cracking characteristics. Seven UHP-SHCC specimens with identical

dimensions of 500 x 150 x 50 mm were tested under pure axial tension. Different configurations of the

internal reinforcement were considered; namely, internal orthogonal mesh of clear spacing of 50 mm in

both directions, or smooth bars of 6 mm diameter. For both configurations, different reinforcement ratios

were considered. The experiential results showed that the internal mesh configuration enabled the

specimen to develop better crack distribution along with higher tensile capacity compared to those of

specimens having internal smooth bars configurations. In addition, increasing the internal reinforcement

ratio resulted in increase the tensile strength of the UHP-SHCC as well as reduce the average crack

spacing.

Keywords