In the present study, a new method for retrofitting reinforced concrete beam is introduced in which steel-concrete composite jackets containing steel fiber is used. For this purpose, 75% of the peripheral surface of reinforced concrete beams was initially reinforced using steel plates and bolts, and steel fiber reinforced concrete was used between the steel plates and the peripheral surfaces of...

semiconducting carbon nanofibers (cnf) are prepared from three different sources, i.e., acetylene, ethanol, and cotton by the chemical vapor deposition (cvd) process. these fibers are having rich elastic, engineering and conductivity properties. fresh self-compacting concrete (scc) flows into place and around obstructions under its own weight to fill the formwork completely and self-compact, wi...

In this paper, modeling of high speed projectiles with different nose shapes, penetrating into steel fiber reinforced concrete is investigated. This is a novel study because it considers the length to diameter ratio of steel fiber as well as projectile length to diameter ratio and volume fraction of fiber used in concrete matrix on the impact resistance of steel fiber reinforced concrete fibers...

there is a worldwide interest in using fibers of different types in concrete mixtures. in this regard, as the use of pet fibers has gradually increased during the last decade, this study aims to investigate the effects of pet fibers on the mechanical properties of hardened concrete and the workability of fresh concrete. to this end, different contents of pet fibers (pc= %0, %0.5, %1 and %1.5) a...

The use of Steel Fiber Reinforced Self-Compacting Concrete (SCFRC) as structural elements is seen favorable alternative to solve typical issues complex reinforcing spacing and compaction in normal reinforced concrete. primary benefit SCFRC that it can be easily poured in-situ, filling corners formwork gaps between bars reinforcement with its own weight. SCFRC's performance constantly being inve...

Abstract Freeze–thaw damage and the lack of aggregate resources have become two major problems facing construction industry. The use recycled to produce concrete has good social economic value. In this study, author used coarse as a substitute for stone mix concrete. order enhance performance concrete, microwave heating modification process was introduced 0.10% volume fraction polypropylene fib...