Effects of Short Fibers and Pre-tension on Tensile Behaviors of Basalt Textile Reinforced Concrete (BTRC)
Tensile behaviors of basalt textile reinforced concrete (BTRC) with five layers of textile and different volume contents of short carbon, glass and steel fibers (0.5 vol.%, 1.0 vol.% and 1.5 vol.% for carbon and steel fibers;and 0.5 vol.% for glass fiber) are investigated under uniaxial tensile loading by using a MTS load frame, also pre-tensioned BTRC with 0.5vol.% short carbon and steel fibers are tested.The reinforcing mechanisms of different short fibers and pre-tension are illustrated in details, and digital image correlation (DIC) analysis is performed in order to obtain full-field strain and cracks distribution.First-crack stress, ultimate load and toughness are significantly improved by short fibers and pre-tension, while the improving.trend with increasing volume fractions of various short fibers are different.Short glass, steel fibers and pretension can increase crack numbers with reduced crack spacing and crack width, while there is no obvious effect caused by short carbon fiber.In addition, the shape of cracks changes from linear pattern to curved form due to the addition of short fibers.The critical crack widens quickly, while other non-critical cracks diminish when the strain level beyond the ultimate strain.
Basalt textile reinforced concrete (BTRC) Short fibers Pre-tension Volume fraction Digital image correlation (DIC)
Sai Liu Deju Zhu
Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province, College of Civil Engineering, Hunan University, Changsha, China
国际会议
福州
英文
91-100
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）